阅读说明：本技术 复合容器和塑料制部件 (Composite container and plastic part ) 是由 宫胁琢磨 须贺勇介 于 2015-12-04 设计创作，主要内容包括：本申请涉及复合容器和塑料制部件。本发明提供能够对容器赋予各种功能和特性的复合容器及其制造方法、预塑形坯以及复合预塑形坯。本发明的复合容器的特征在于,其具备塑料材料制容器主体、以及设置在容器主体外面的塑料制部件,容器主体和塑料制部件通过吹塑成型作为一体来膨胀,塑料制部件具备着色层和/或施有印刷的印刷层。(The present application relates to composite containers and plastic parts. The invention provides a composite container capable of providing various functions and characteristics to the container, a manufacturing method thereof, a preform and a composite preform. The composite container of the present invention is characterized by comprising a container body made of a plastic material and a plastic member provided on the outer surface of the container body, wherein the container body and the plastic member are expanded as a single body by blow molding, and the plastic member comprises a colored layer and/or a printed layer on which a print is applied.)

1. A composite container, characterized in that,

the composite container is provided with:

container body made of plastic material, and

a plastic component arranged outside the container body,

the container body and the plastic member are expanded as a single body by blow molding,

the plastic member is provided with a coloring layer and/or a printed layer on which printing is applied,

the plastic member has a function of heat-shrinking with respect to the container body,

the plastic member is provided so as to be peelable from the container body without being welded or bonded to the container body.

2. A composite container, characterized in that,

the composite container is provided with:

container body made of plastic material, and

a plastic component arranged outside the container body,

the container body and the plastic member are expanded as a single body by blow molding,

the container body includes a colored layer containing a resin material and a colorant,

the plastic member has a function of heat-shrinking with respect to the container body,

the plastic member is provided so as to be peelable from the container body without being welded or bonded to the container body.

3. A plastic member which is assembled so as to surround the outer side of a preform and is heated together with the preform to produce a composite container comprising the preform and a plastic member which is bonded to the outer side of the preform in a peelable manner, wherein the plastic member is not bonded to the outer surface of the preform,

which has a cylindrical body part covering at least the body part of the preform,

which comprises a coloring layer and/or a printed layer on which printing is applied,

it has heat shrinkage effect.

Technical Field

The present invention relates to a composite container, a composite preform, a plastic member, and a method for manufacturing a composite container.

Background

In recent years, plastic bottles have become popular as bottles for containing content liquids such as foods and drinks, and such plastic bottles contain content liquids.

A plastic bottle containing such a content liquid is manufactured by inserting a preform into a mold and performing biaxial stretch blow molding.

In the conventional biaxial stretch blow molding method, for example, a preform made of a single-layer material such as PET or PP, a multi-layer material, a blend material, or the like is molded into a container shape. However, in the conventional biaxial stretching blow molding method, only the preform is usually molded into a container shape. Therefore, when the container is provided with various functions or characteristics (barrier property, heat retaining property, etc.), for example, the material constituting the preform is changed, and the means therefor is limited. In particular, it is difficult to provide the container with different functions or characteristics depending on the location (e.g., body portion, bottom portion) of the container.

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese laid-open patent publication No. 2009-241526

The present invention has been made in view of such circumstances, and an object thereof is to provide a composite container, a composite preform, and a plastic member which can impart various functions and characteristics to the container.

Disclosure of Invention

The composite container of the present invention is characterized by comprising:

container body made of plastic material, and

a plastic member disposed outside the container body,

the container body and the plastic member are expanded as a single body by blow molding,

the plastic member includes a colored layer and/or a printed layer on which printing is applied.

The composite container of the present invention is characterized by comprising:

container body made of plastic material, and

a plastic member disposed outside the container body,

the container body and the plastic member are expanded as a single body by blow molding,

the container body is provided with a colored layer containing a resin material and a colorant.

In the above aspect, the plastic member preferably has a function of shrinking with respect to the container body.

The composite preform of the present invention is characterized by comprising:

preform made of plastic material, and

a plastic member disposed so as to surround the outer side of the preform,

the plastic part is closely connected with the outer side of the pre-molding blank,

the plastic member includes a colored layer and/or a printed layer on which printing is applied.

The composite preform of the present invention is characterized by comprising:

preform made of plastic material, and

a plastic member disposed so as to surround the outer side of the preform,

the plastic part is closely connected with the outer side of the pre-molding blank,

the preform includes a colored layer containing a resin material and a colorant.

In the above aspect, the plastic member preferably has a function of shrinking with respect to the preform.

The plastic part of the present invention is used for manufacturing a composite container having a preform and a plastic part closely adhered to the outside of the preform by assembling the plastic part so as to surround the outside of the preform and heating the plastic part together with the preform,

which has a cylindrical body part covering at least the body part of the preform,

the color filter comprises a colored layer and/or a printed layer on which printing is applied.

The method for manufacturing a composite container according to the present invention includes the steps of:

preparing a plastic material to prepare a preform;

a step of arranging a plastic member on the outer side of the preform;

a step of providing a printing region on the surface of the plastic component;

a step of inserting the preform and the plastic member into a blow mold while heating them; and

and a step of expanding the preform and the plastic member as a single body by performing blow molding on the preform and the plastic member in a blow molding die.

The method for manufacturing a composite container according to the present invention includes the steps of:

preparing a plastic material to prepare a preform;

a step of providing a plastic member, which is provided with a printing region on the surface thereof in advance, on the outer side of the preform;

a step of inserting the preform and the plastic member into a blow mold while heating them; and

and a step of expanding the preform and the plastic member as a single body by performing blow molding on the preform and the plastic member in a blow molding die.

The method for manufacturing a composite container according to the present invention includes the steps of:

preparing a plastic material to prepare a preform;

a step of arranging a plastic member on the outer side of the preform;

inserting the preform and the plastic member into a blow mold while heating;

a step of expanding the preform and the plastic member as a single body by performing blow molding on the preform and the plastic member in the blow molding die; and

and a step of providing a printing region on the surface of the plastic member.

In the above aspect, the printing region is preferably formed by an inkjet method.

Drawings

Fig. 1 is a partial vertical sectional view showing the composite vessel of the present invention in one embodiment.

Fig. 2 is a horizontal sectional view (sectional view of line II-II of fig. 1) showing the composite vessel of the present invention in one embodiment.

Fig. 3 is a partial vertical sectional view showing the composite vessel of the present invention in one embodiment.

Fig. 4 is a vertical sectional view showing the composite preform of the present invention in one embodiment.

Fig. 5 is a partial vertical sectional view showing the composite vessel of the present invention in one embodiment.

Fig. 6 is a partial vertical cross-sectional view illustrating a labeled composite container of the present invention in one embodiment.

Fig. 7 is a partial vertical sectional view showing the composite vessel of the present invention in one embodiment.

Fig. 8 is a partial vertical cross-sectional view illustrating a labeled composite container of the present invention in one embodiment.

Fig. 9 is a vertical sectional view showing the composite preform of the present invention in one embodiment.

Fig. 10(a) to (f) are sectional views showing various plastic parts on which printing is applied.

Fig. 11(a) to (d) are schematic views showing an embodiment of printing on a plastic member.

Fig. 12(a) to (d) are perspective views showing various plastic components.

Fig. 13(a) to (f) are schematic views showing a method for manufacturing a composite container of the present invention in one embodiment.

Fig. 14(a) to (f) are schematic views showing a method for manufacturing a composite container of the present invention in one embodiment.

Fig. 15(a) to (g) are schematic views showing a method for manufacturing a composite container of the present invention in one embodiment.

Fig. 16 is a partial vertical sectional view showing the composite vessel of the present invention in one embodiment.

Fig. 17 is a vertical sectional view showing the composite preform of the present invention in one embodiment.

Fig. 18(a) to (f) are schematic views showing a method for manufacturing a composite container of the present invention according to one embodiment.

FIG. 19 is a partial vertical sectional view showing the composite vessel of the present invention in one embodiment.

Fig. 20 is a horizontal sectional view (XX-XX ray sectional view of fig. 11) showing a composite container according to a second embodiment of the present invention.

Fig. 21 is a vertical sectional view showing the composite preform of the present invention in one embodiment.

Fig. 22(a) to (d) are perspective views showing various inner label members and various plastic members.

Fig. 23(a) to (f) are schematic views showing a method for manufacturing a composite container of the present invention in one embodiment.

Fig. 24(a) to (f) are schematic views showing a method for manufacturing a composite container of the present invention in one embodiment.

Fig. 25(a) to (g) are schematic views showing a method for manufacturing a composite container of the present invention in one embodiment.

FIG. 26 is a partial vertical sectional view showing the composite container of the present invention in one embodiment.

Fig. 27 is a vertical sectional view showing a modification of the composite preform of the present invention in one embodiment.

Fig. 28(a) to (f) are schematic views showing a method for manufacturing a composite container of the present invention in one embodiment.

Detailed Description

First embodiment

A first embodiment of the present invention will be described below with reference to the drawings. Fig. 1 to 18 are views showing a first embodiment of the present invention.

(composite container 10A)

First, an outline of a composite container 10A manufactured by the blow molding method according to the present embodiment will be described with reference to fig. 1 and 2.

In the present specification, "upper" and "lower" refer to upper and lower, respectively, in the upright state (fig. 1) of the composite container 10A.

As described below, the composite container 10A shown in fig. 1 and 2 is obtained as follows: a composite preform 70 (see fig. 4) including the preform 10A and the plastic member 40A is subjected to biaxial stretching blow molding using a blow mold 50, and the preform 10A and the plastic member of the composite preform 70 are expanded as one body 40A to obtain a composite container 10A.

The composite container 10A may have the shape shown in fig. 3.

The composite container 10A of the present invention includes: a plastic container body 10 located inside, and a plastic member 40 closely attached to the outside of the container body 10.

The container body 10 includes: the mouth portion 11, a neck portion 13 provided below the mouth portion 11, a shoulder portion 12 provided below the neck portion 13, a body portion 20 provided below the shoulder portion 12, and a bottom portion 30 provided below the body portion 20.

The plastic member 40 is attached in a state of being thinly spread on the outer surface of the container body 10, and not easily moved or rotated with respect to the container body 10.

In one embodiment, as shown in fig. 5, a surface protective layer 80 may be provided on the surface of the plastic member 40.

In one embodiment, as shown in fig. 6, the label 43 may be attached to the container body 10 and/or the plastic member 40.

(Container main body 10)

Next, the container body 10 will be described in detail. As described above, the container body 10 has the mouth portion 11, the neck portion 13, the shoulder portion 12, the body portion 20, and the bottom portion 30.

The mouth portion 11 has a threaded portion 14 screwed to a cap portion, not shown, and a flange portion 17 provided below the threaded portion 14. The shape of the mouth portion 11 may be a conventionally known shape.

The neck portion 13 is located between the flange portion 17 and the shoulder portion 12, and has a substantially cylindrical shape with a substantially uniform diameter. The shoulder portion 12 is located between the neck portion 13 and the body portion 20, and has a shape in which the diameter gradually increases from the neck portion 13 side toward the body portion 20 side.

The body portion 20 has a cylindrical shape having a substantially uniform diameter as a whole.

However, the shape of the body portion 20 is not limited to this, and may have a polygonal tubular shape such as a quadrangular tubular shape or an octagonal tubular shape. Alternatively, the main body 20 may have a tubular shape having a non-uniform horizontal cross section from the top to the bottom. In the present embodiment, the main body portion 20 has a substantially flat surface without forming irregularities, but is not limited thereto. For example, the main body 20 may be formed with irregularities such as a surface plate (パネル) and a groove.

On the other hand, the bottom portion 30 has a concave portion 31 located at the center and a land portion 32 provided around the concave portion 31. The shape of the bottom 30 is not particularly limited, and may have a conventionally known bottom shape (for example, a petal-bottom shape, a round-bottom shape, etc.).

In one embodiment, the container body 10 is made of a resin material. In one embodiment, the container body 10 includes a colored layer including a resin material and a colorant.

Examples of the resin material contained in the container body 10 include PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PC (polycarbonate), and the like.

In addition to these resins, nylon resins such as nylon-6, nylon-11, nylon-12, nylon-6, nylon-6, 10, nylon-6/12, nylon-6/11, nylon-6/9, nylon-6/6, 6, nylon-6/6, 6/6,10, polyhexamethylene isophthalamide (MXD-6), and a hexamethylene terephthalamide/hexamethylene isophthalamide copolymer (nylon-6T/6I) can be contained.

Among them, the container body 10 preferably contains nylon-6, MXD-6, and nylon-6/6, 6 having good gas barrier properties.

The container body 10 may contain a polyvinyl alcohol resin. The polyvinyl alcohol resin is obtained by saponifying a vinyl ester homopolymer or a copolymer of a vinyl ester and another monomer (for example, a copolymer of a vinyl ester and ethylene) with an alkali catalyst or the like. Vinyl acetate is a typical compound, and other vinyl esters of fatty acids such as vinyl propionate and vinyl pivalate can also be used. Among the polyvinyl alcohol resins, an ethylene-vinyl alcohol copolymer (EVOH) is particularly preferable because it is easily melt-molded and exhibits good gas barrier properties even under high humidity.

In addition, the container body 10 may contain an ionomer resin.

The container body 10 may contain a resin material obtained by blending the various resins described above.

Examples of the blended resin material include a material obtained by mixing a thermoplastic resin and a nylon resin.

The container body 10 includes the blended resin material obtained by mixing the thermoplastic resin and the nylon resin, so that the molding stability of the resin material can be improved, and the gas barrier property of the container body 10 can be improved, and the composite container 10A having excellent gas barrier property as a whole can be provided even in a mode in which the plastic member 40 does not cover the entire container body.

As the colorant, a colorant such as brown, black, green, white, blue or red may be used.

The colorant may be a pigment or a dye, and is preferably a pigment in terms of light resistance.

By including the colorant in the container body 10, the colored composite container 10A can be produced even when the plastic member 40 does not include the colorant.

Further, by coloring the entire composite container 10A in a predetermined color, visible light in a desired wavelength region can be cut off (absorbed or reflected), and the content liquid filled in the composite container 10A can be prevented from being denatured by the visible light.

In addition, when the plastic member 40 contains a colorant, the composite container 10A can be made of various designs such as a color different from the colorant contained in the container body 10, and visibility can be improved.

In addition, when a white pigment such as titanium white, aluminum powder, mica powder, zinc sulfide, zinc white, calcium carbonate, kaolin, or talc is included as a light-reflective pigment, and a color pigment such as carbon black, ceramic black, or bone char is included as a light-absorbing pigment as a colorant, in addition to the above-described effects, the visible light transmittance of the plastic member 40 after blow molding can be further reduced, and the quality of the content liquid filled in the composite container 10A can be prevented from changing. The content of the colorant is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 10 parts by mass, and still more preferably 0.2 to 5 parts by mass, based on 100 parts by mass of the resin material contained in the colored layer.

The container body 10 may be formed of a single layer or a plurality of layers.

In this case, the main components constituting the innermost and outermost layers may be the same or different.

Specific examples of the layer structure include a layer structure of PET/MXD-6/PET, PET/PET + MXD-6/PET, PET/EVOH/PET from the innermost surface.

The intermediate layer is formed of a resin material having gas barrier properties and light-shielding properties such as MXD6, MXD6+ fatty acid salt, PGA (polyglycolic acid), EVOH, or PEN, whereby a multilayer bottle having gas barrier properties and light-shielding properties can be produced.

At least 1 of these layers may be made to contain a coloring agent to form a colored layer.

In the body 20, the thickness of the container body 10 may be as thin as about 50 μm to 250 μm, for example, but is not limited thereto. The weight of the container body 10 may be, for example, 10g to 20g when the volume is 500ml, but is not limited thereto. By reducing the thickness of the container body 10 in this manner, the container body 10 can be reduced in weight.

In one embodiment, the container body 10 may be made as follows: the container body 10 is manufactured by injection molding a resin material or a mixture including a resin material and a colorant to manufacture a preform 10a (described later), and biaxially stretch blow molding the manufactured preform 10 a.

In the case where the container body 10 is formed of 2 or more layers including colored layers, the composite container 10 can be manufactured by co-injection molding a mixture of a resin material and a colorant and an arbitrary resin material.

Alternatively, the container body 10 may be produced by mixing an inert gas (nitrogen or argon) into a melt of a thermoplastic resin to form an expanded preform having an expanded pore diameter of 0.5 to 100 μm, and blow molding the expanded preform. Since the container body 10 has the foam cells built therein, the light shielding property of the entire container body 10 can be improved.

Such a container body 10 may be constituted by a bottle having a full volume of 100mL to 2000mL, for example. Alternatively, the container body 10 may be a large bottle having a full capacity of, for example, 10L to 60L.

(Plastic component 40)

Next, the plastic member 40 will be described.

The plastic member 40 can be obtained by blow molding the plastic member 40 a. More specifically, the plastic member 40 can be obtained by providing the plastic member 40a so as to surround the outside of the preform 10a as described below, closely adhering the plastic member to the outside of the preform 10a, and then biaxially stretch blow molding the plastic member together with the preform 10 a.

The plastic member 40 is attached so as not to adhere to the outer surface of the container body 10, and is closely adhered to the container body 10 to such an extent that it does not move or rotate with respect to the container body 10.

The plastic member 40 is thinly spread on the outside of the container body 10 to cover the container body 10. As shown in fig. 2, the plastic member 40 is provided so as to surround the entire circumferential region of the container body 10, and has a substantially circular horizontal cross section.

In this case, the plastic member 40 is provided so as to cover the shoulder 12, the body 20, and the bottom 30 of the container body 10 except for the mouth portion 11 and the neck portion 13. Thereby, desired functions and characteristics can be imparted to the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10.

The plastic member 40 may be provided in the entire region or a partial region of the container body 10 excluding the mouth portion 11.

For example, the plastic member 40 may be provided so as to cover the entire region of the neck portion 13, the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11.

For example, the plastic member 40 may be provided so as to cover only the bottom 30.

The number of plastic members 40 is not limited to 1, and a plurality of plastic members may be provided. For example, 2 plastic parts 40 may be provided outside the shoulder 12 and outside the bottom 30, respectively. The plastic member 40 may be formed of a single layer or a plurality of layers.

The plastic member 40(40a) may contain a resin material.

For example, PE, PP, PET, PEN, poly-4-methyl-1-pentene, polystyrene, AS resin, ABS resin, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, diallyl phthalate resin, fluorine-based resin, polymethyl methacrylate, polyacrylic acid, polymethyl acrylate, polyacrylonitrile, polyacrylamide, polybutadiene, poly-1-butene, polyisoprene, polychloroprene, ethylene propylene rubber, butyl rubber, nitrile rubber, acrylic rubber, silicone rubber, fluororubber, nylon 6, nylon MXD6, aromatic polyamide, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, U polymer, polyvinyl acetate, polyvinyl alcohol, polyvinyl butyral, polyvinyl acetate, polyvinyl alcohol, polyvinyl butyral, polyvinyl alcohol, liquid crystal polymers, modified polyphenylene ethers, polyether ketones, polyether ether ketones, unsaturated polyesters, alkyd resins, polyimides, polysulfones, polyphenylene sulfides, polyether sulfones, silicone resins, polyurethanes, phenol resins, urea resins, polyoxyethylene, polypropylene oxides, polyacetals, epoxy resins, ionomer resins, and other resin materials.

Among them, thermoplastic non-elastic resin materials such as PE, PP, PET, PEN, and the like are preferably contained.

By including PE, PP, and/or PET, the wettability of the layer to be printed can be easily improved, and the quality of the printed matter can be improved.

Further, the inclusion of PEN can improve gas barrier properties against oxygen, water vapor, carbon dioxide, carbonic acid gas, and the like, and light barrier properties against ultraviolet rays and the like, and can further prevent carbonic acid gas from permeating through the container.

Further, the inclusion of PEN can improve mechanical strength.

The content of PEN in the plastic member 40a is preferably 20 mass% or more, more preferably 50 mass% or more, and still more preferably 90 mass% or more, with respect to the total mass of the resin material, in the case where the plastic member 40a is a single layer. When the plastic member 40a has a plurality of layers, the content of PEN is preferably 20 mass% or more, more preferably 50 mass% or more, and still more preferably 90 mass% or more, based on the total mass of the resin material contained in the layer containing PEN.

The plastic member 40(40a) may contain, as a resin material, a copolymer obtained by polymerizing 2 or more monomer units constituting the resin. The plastic member 40(40a) may contain 2 or more types of the above resin materials.

Further, the light-shielding property can be improved by mixing an inert gas (nitrogen gas, argon gas) into a melt of the thermoplastic resin and molding the foamed preform using a foaming member having a foaming pore diameter of 0.5 to 100 μm.

In one embodiment, the plastic member 40(40a) may also contain an ultraviolet absorber. The ultraviolet absorber may be contained in a colored layer described later or in a printed layer.

Examples of the ultraviolet absorber include benzotriazole-based ultraviolet absorbers, triazine-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, and benzoate-based ultraviolet absorbers.

When the plastic member 40 is formed of a single layer, the content of the ultraviolet absorber is preferably 0.01 to 10 parts by mass, and more preferably 0.1 to 3 parts by mass, based on 100 parts by mass of the resin material contained in the plastic member 40. When the plastic member 40 is formed of a plurality of layers, the content of the ultraviolet absorber is preferably 0.01 to 10 parts by mass, and more preferably 0.1 to 3 parts by mass, based on 100 parts by mass of the resin material contained in the layer of the plastic member 40 containing the ultraviolet absorber.

The plastic member 40 preferably has an ultraviolet transmittance of 5% or less, more preferably 3% or less, and still more preferably 1% or less.

Ultraviolet rays refer to light having a wavelength of 10nm to 400 nm. The ultraviolet transmittance of 5% or less means that the transmittance is 5% or less in the entire ultraviolet wavelength region (10nm to 400 nm).

The transmittance of visible light and ultraviolet light can be measured by a method according to JIS a 5759. For example, the transmittance of visible light and ultraviolet light can be determined by measuring the wavelength of light at intervals of 0.5nm in a range of 10nm to 400nm using a spectrophotometer (UV 3100, manufactured by Shimadzu corporation).

In addition, in one embodiment, the plastic member 40(40a) may be made of the same material as the container body 10 (preform 10 a).

In this case, in the composite container 10A, for example, the plastic member 40 having the layer is disposed in a portion where the strength is desired to be improved, and the strength in that portion can be selectively improved. For example, the plastic member 40 is provided around the shoulder 12 and the bottom 30 of the container body 10, and the strength of the portions can be improved. Examples of such a material include thermoplastic resins (particularly PE, PP, PET, PEN, and PC), ionomer resins, and the like.

For example, the container body 10 may contain 80 mass% of PET and 20 mass% of PP, and the plastic member 40 as the thickness increasing member may contain 75 mass% of PET and 25 mass% of PP.

The plastic member 40(40a) may include a material having gas barrier properties such as oxygen barrier properties and water vapor barrier properties. In this case, the gas barrier property of the composite container 10A can be improved, the deterioration of the content liquid due to oxygen can be prevented, and the decrease in the content due to the transpiration of water vapor can be prevented without using a multilayer preform or a preform containing a blend material as the preform 10A. For example, the plastic member 40 may be provided over the entire regions of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container body 10 to improve the gas barrier property at these portions. As such a material, PE, PP, MXD-6 (nylon), EVOH (ethylene vinyl alcohol copolymer) or an oxygen absorbent such as a fatty acid salt mixed in these materials is considered.

The plastic member 40(40a) may include a material having light-blocking properties such as ultraviolet rays. In this case, the light-blocking property of the composite container 10A can be improved and the content liquid can be prevented from being deteriorated by ultraviolet rays or the like without using a multilayer preform or a preform containing a blend material as the preform 10A. For example, the plastic member 40 may be provided over the entire regions of the shoulder portion 12, the neck portion 13, the body portion 20, and the bottom portion 30 of the container body 10 to improve the ultraviolet blocking property at these portions. As such a material, a material obtained by blending PET, PE, and PP with a light-shielding resin is considered. In addition, a foamed member having a foamed cell diameter of 0.5 to 100 μm produced by mixing an inert gas (nitrogen or argon) into a melt of a thermoplastic resin may be used.

The plastic member 40(40a) may include a material (material with low thermal conductivity) having a higher heat retaining property or cold retaining property than the plastic material constituting the container body 10 (preform 10 a). In this case, the temperature of the content liquid can be made less likely to be transmitted to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. This improves the heat retaining property or the cold retaining property of the composite container 10A. For example, the plastic member 40 may be provided on all or a part of the body portion 20 of the container body 10 to improve the heat retaining property or the cold retaining property of the body portion 20. In addition, when the user holds the composite container 10A, it is possible to prevent the composite container 10A from being difficult to grasp due to overheating or overcooling. As such a material, there are considered foamed polyurethane, polystyrene, PE, PP, phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like. Further, a foamed member having a foamed pore diameter of 0.5 to 100 μm produced by mixing an inert gas (nitrogen or argon) into a melt of a thermoplastic resin may be used. It is preferable to mix hollow particles in a resin material containing these resins. The average particle diameter of the hollow particles is preferably 1 to 200. mu.m, more preferably 5 to 80 μm. The "average particle diameter" refers to a volume average particle diameter, and can be measured by a known method using a particle size distribution/particle size distribution measuring apparatus (for example, a nanosrac particle size distribution measuring apparatus, manufactured by japan ltd., and the like). The hollow particles may be organic hollow particles made of a resin or the like, or inorganic hollow particles made of a glass or the like, and organic hollow particles are preferable because of excellent dispersibility. Examples of the resin constituting the organic hollow particles include styrene resins such as crosslinked styrene-acrylic resins, (meth) acrylic resins such as acrylonitrile-acrylic resins, phenol resins, fluorine resins, polyamide resins, polyimide resins, polycarbonate resins, and polyether resins. Commercially available hollow particles such as Ropaque HP-1055, Ropaque HP-91, Ropaque OP-84J, Ropaque Ultra, Ropaque SE, Ropaque ST (manufactured by Rohm and Haas Co., Ltd.), Nipol MH-5055 (manufactured by Zeon corporation, Japan), SX8782, and SX866 (manufactured by JSR corporation) can also be used. The content of the hollow particles is preferably 0.01 to 50 parts by mass, and more preferably 1 to 20 parts by mass, based on 100 parts by mass of the resin material contained in the layer of the plastic member 40 containing the hollow particles.

The plastic member 40(40a) may be made of a material that is less likely to slip than the plastic material constituting the container body 10 (preform 10 a). In this case, the user can easily hold the composite container 10A without changing the material of the container body 10. For example, the plastic member 40 may be provided on all or a part of the body portion 20 of the container body 10 to facilitate grasping of the body portion 20.

In addition, in the plastic member 40(40a), various additives may be added in addition to the above-described resin as a main component within a range not impairing the characteristics thereof. As the additives, for example, a plasticizer, an ultraviolet stabilizer, a stain-proofing agent, a delustering agent, a deodorizing agent, a flame retardant, a weather-proofing agent, an antistatic agent, a yarn friction-reducing agent, a slipping agent, a releasing agent, an antioxidant, an ion exchanger, a lubricant, a coloring pigment, and the like can be added.

In one embodiment, the plastic member 40 includes a colored layer and/or a printed layer having a printed region (printing region).

(colored layer)

The colored layer may contain the above-mentioned resin material and a coloring agent.

As the colorant, a colorant such as brown, black, green, white, blue or red may be used.

The plastic member 40(40A) can cut off (absorb or reflect) the visible light in a desired wavelength range by including the colorant of a predetermined color, and can prevent the content liquid filled in the composite container 10A from being denatured by the visible light.

For example, when beer is filled as the content, visible light having a cutoff wavelength of 400nm to 500nm is required. In this case, by incorporating a brown colorant in the colored layer of the plastic member 40(40a) and coloring the entire plastic member into a brown color, visible light having a wavelength of 400nm to 500nm can be cut off, and beer as a content can be prevented from being denatured.

In the present specification, the visible light refers to light having a wavelength of 380nm to 800 nm. The visible light transmittance can be measured by a method according to JIS a 5759. For example, the transmittance of visible light at a wavelength of 220nm to 800nm can be determined by measuring the wavelength at 0.5nm intervals using a spectrophotometer (UV 3100, manufactured by Shimadzu corporation).

The colorant may be a pigment or a dye, and is preferably a pigment in view of light resistance. Among the pigments, light-reflective pigments and light-absorbing pigments are preferable.

Examples of the light-reflective pigment include titanium white, aluminum powder, mica powder, zinc sulfide, zinc white, calcium carbonate, kaolin, talc, and the like, and examples of the light-absorbing pigment include carbon black, ceramic black, bone char, and the like.

By including the light-reflective coloring agent and/or the light-absorptive coloring agent in the plastic member 40(40A), visible light in a wider wavelength range can be cut off, and the content filled in the composite container 10A can be prevented from being denatured. Among the above colorants, black light absorbing pigments, brown light absorbing pigments, and the like are more preferable in order to significantly reduce the visible light transmittance of the plastic member 40.

The colored layer may contain 2 or more kinds of the above colorants, and the plastic member 40 may have 2 or more colored layers.

The content of the colorant in the colored layer is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 3.0 parts by mass, and still more preferably 0.5 to 2.0 parts by mass, based on 100 parts by mass of the resin material contained in the colored layer. When the content of the colorant is within the above numerical range, the change in the resin properties of the colored layer can be suppressed as much as possible, and the molding can be performed with a stable color tone.

(printing layer)

The printing layer is printed by design or printing, as shown in fig. 7, that is, has a printing region 44(44 a). In fig. 7, printing is performed on the outer surface of the outer surface layer of the plastic member 40, but the printing is not limited to this, and may be performed on the inner surface or the outer surface of any layer constituting the plastic member 40.

By providing the plastic member 40 with the printed layer, images and characters can be displayed on the composite container 10A without separately providing a label or the like to the container body 10. For example, the plastic member 40 may be provided on the entire or a part of the body portion 20 of the container body 10, and an image or characters may be displayed on the body portion 20.

The print region 44(44a) may be formed outside or inside each layer of the plastic member 40.

The printing can be performed by a printing method such as an ink jet method, a gravure printing method, an offset printing method, or a flexographic printing method.

The printing may be applied to the plastic part 40 of the blow molded composite container 10A.

The resin film before lamination described later may be printed, or the single-layer plastic resin pipe before lamination may be printed. The plastic member 40a may be printed before being assembled to the preform 10a, or the plastic member 40a may be printed in a state of being disposed outside the preform 10 a.

It is preferable to perform surface treatment such as corona treatment, low-temperature plasma treatment, flame treatment, or the like on the position where the printing region of the plastic member 40 is formed. By performing such surface treatment, wettability of the surface of the resin film or resin tube is improved, and print quality can be improved.

Additionally, in one embodiment, the anchor coating is preferably preformed on the plastic component 40. When the anchor coat layer is provided, the adhesion of the ink to the plastic member 40(40a) is improved. Therefore, it is not necessary to perform a pretreatment such as corona treatment. Furthermore, ink bleeding of printing can also be reduced by providing the anchor coating layer.

As described above, the plastic member 40 may be formed of a single layer or a plurality of layers, and the resin materials forming the innermost and outermost layers may be the same or different.

Specifically, the adhesive layer may be composed of a low-density PE +/adhesive layer/EVOH/adhesive layer/low-density PE, PP/adhesive layer/EVOH/adhesive layer/PP, low-density PE/adhesive layer/low-density PE + colorant (coloring layer), or the like.

At least 1 of these layers may contain a colorant to form a colored layer, or may be printed to form a printed layer.

Examples of the adhesive constituting the adhesive layer include a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, a polyamide adhesive, a polyimide adhesive, an amino resin adhesive, a phenol resin adhesive, an epoxy adhesive, a urethane adhesive, a rubber adhesive, and a silicone adhesive.

Further, since the plastic member 40 is not welded or bonded to the container body 10, it can be peeled and removed from the container body 10.

Specifically, for example, the plastic member 40 may be cut off with a blade or the like, or a cutting line, not shown, may be provided in advance on the plastic member 40, and the plastic member 40 may be peeled off along the cutting line. Thus, the plastic member 40 on which printing is applied can be separated and removed from the container body 10, and thus, the colorless and transparent container body 10 can be recycled as in the conventional case.

The thickness of the plastic member 40 may be, for example, about 5 to 50 μm in a state of being assembled to the container body 10, but is not limited thereto.

(surface protective layer 80)

In one embodiment, as shown in fig. 5, the composite container 10A may be provided with a surface protective layer 80 on the surface of the plastic component 40. The surface protection layer 80 plays a role of protecting the plastic component 40.

The surface protective layer 80 may be provided so as to cover not only the plastic member 40 but also the entire or a part of the container.

The surface protection layer 80 may be colored or may not be colored. The surface protection layer 80 may be a transparent layer or an opaque layer, and is preferably transparent in terms of maintaining print quality when printing or the like is performed on the plastic member 40.

In one embodiment, the surface protective layer 80 is thinly spread on the outer surface of the plastic component 40, covering at least the plastic component 40. The surface protective layer 80 may be provided over the entire circumferential region so as to surround the plastic member 40 and the container body 10, and may have a substantially circular horizontal cross section.

In one embodiment, the surface protective layer 80 is provided in such a manner as to cover the shoulder portion 12, the body portion 20 and the bottom portion 30, and the plastic member 40 in the container body 10 except for the mouth portion 11 and the neck portion 13.

It should be noted that the surface protective layer 80 may be provided on the entire area or a partial area of the container body 10 and the plastic member 40.

For example, the plastic member 40 may be provided so as to cover only a portion to which printing is applied and a portion to be colored. The surface protection layer 80 is not limited to 1 layer, and may be provided in 2 or more layers.

The surface protection layer 80 preferably contains a thermosetting resin or an ionizing radiation curable resin, and more preferably an ionizing radiation curable resin in view of high surface hardness and excellent productivity. The thermosetting resin may be used in combination with the ionizing radiation curing resin.

The ionizing radiation-curable resin is not particularly limited as long as it can undergo a polymerization crosslinking reaction by irradiation with ionizing radiation such as ultraviolet rays or electron beams, and examples thereof include polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and polyols.

More specifically, there may be mentioned: ethyl (meth) acrylate having 1 unsaturated bond, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone and the like; polyhydroxymethylpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and the like having 2 or more unsaturated bonds; or a reaction product of the above compound with a (meth) acrylate or the like.

In the present specification, "(meth) acrylate" means methacrylate and acrylate.

Further, it is preferable to use these resins in combination with a photopolymerization initiator, and examples thereof include acetophenones, benzophenones, benzoins, and the like.

Examples of the thermosetting resin include phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea-formaldehyde cocondensate resin, silicone resin, and polysiloxane resin.

Further, it is preferable to use these resins in combination with a thermal polymerization initiator, a curing accelerator, a curing agent, and the like.

The surface protective layer 80(80a) can be formed by applying a coating liquid containing the above resin composition by a printing method such as an inkjet method, a gravure printing method, an offset printing method, or a flexographic printing method and curing the coating liquid.

Among them, the coating method is preferably used because the coating area and shape of the coating liquid can be adjusted, the amount of the coating liquid used can be reduced, and a pattern based on the gloss can be reproduced.

When the ink jet method is used, printing on the surface of the plastic member 40(40a) and formation of the surface protective layer 80(80a) can be performed in the same apparatus, and thus the number of steps can be reduced, which is preferable.

Specifically, the surface protective layer 80(80a) can be formed by applying a coating liquid to at least the surface of the plastic member 40(40a) by an ink jet method, and then irradiating ionizing radiation thereto for curing.

As the ionizing radiation, electromagnetic waves or charged particles having energy capable of causing a curing reaction of molecules in the ionizing radiation-curable resin are used. Ultraviolet rays or electron rays are generally used, but visible rays, X rays, ion rays, and the like may also be used.

The surface protection layer 80a (80) may be formed on the plastic part 40a before being assembled to the preform 10a, for example.

The surface protective layer may be formed on the plastic member 40a and/or the preform 10a included in the composite preform 70 before blow molding.

The surface protective layer may be formed on the plastic member 40 and/or the container body 10 included in the blow-molded composite container.

Further, the surface protective layer may be formed on the resin sheet before molding into the plastic member 40 a.

The thickness of the surface protection layer 80 is not limited to this, and may be, for example, about 1 μm to 20 μm in a state of being attached to the container body 10.

(Label 43)

In one embodiment, as shown in fig. 6, in the composite container 10A, a label 43 is mounted on the container body 10 and/or the plastic member 40 thereof.

Examples of the label 43 include a shrink label, an elastic label, a roll label, an adhesive label, a paper label, and a label suspended from the neck portion 13 of the composite container 10A by a string or the like (hereinafter, sometimes referred to as a "suspension label"). Among them, for the reason of high productivity, a shrink label, an elastic label, or a roll label is preferably used.

The label 43 is preferably provided with a printing area where printing is performed. Items displayed in the print area may be text information such as the name of the content liquid, the manufacturer, and the name of the material, in addition to the pattern and the product name. A part or the whole area of the label 43 may be colored in red, blue, yellow, green, brown, black, white, or the like, and may be transparent or opaque.

As an example of the composite container 10A provided with the label 43, as shown in fig. 8(a), the label 43 is attached so as to cover the composite container 10 and a part of the plastic member 40.

As shown in fig. 8(b), a label 43 may be attached so as to cover the entire area of the plastic member 40.

Further, the following structures may be mentioned: as shown in fig. 8(c), the label 43 is provided so as to cover the entire area of the plastic member 40, and the plastic member 40 is colored by making the portion where the label characters are displayed transparent.

Next, as shown in fig. 8(d), a label 43 for hanging and displaying characters from the neck portion 13 of the composite container 10A may be mentioned.

Further, the plastic member 40 and the label 43 may be printed with different patterns, and the plastic member 40 and the label 43 may be superimposed on each other to form a single screen or a three-dimensional structure (not shown), but the invention is not limited thereto.

The following describes various modes of the above-described label.

The shrink label may be wound so as to cover the entire area or a part of the container body 10 and/or the plastic member 40. The shrink label can be obtained by being attached to the container body 10 and/or the plastic member 40 and subjected to a shrink process at a temperature of 80 to 90 degrees.

Shrink labels may be made using the following materials: a polylactic acid film, a polystyrene film, a polyester film, a low-density polyethylene film, a medium-density polyethylene film, a high-density polyethylene film, a low-density straight-chain polyethylene film, a cyclic polyolefin film, or a polypropylene film; centrifugal polyolefin films made of resins such as ethylene-propylene copolymers, ethylene-vinyl acetate copolymers, ionomer resins, ethylene-acrylic acid copolymers, ethylene-methyl acrylate copolymers, and the like; polyester-polystyrene multilayer film, laminated film of non-woven fabric and shrinkage film, and polyester-polystyrene co-extruded film; polyamide membranes such as 6-nylon membranes and 6, 6-nylon membranes; a modified polyolefin film made of resins such as chlorinated polyethylene and chlorinated polypropylene; a film made of a resin of a chlorinated ethylene-vinyl acetate copolymer; resin films such as acrylic resin films.

The film obtained as follows can be used as the film: a single-layer film produced by using 1 or 2 or more of the resins constituting the film by extrusion, cast molding, T-die, cutting, inflation, other film-forming methods, or the like; or a multilayer film produced by coextrusion or the like using 2 or more resins; or various resin films formed by film formation using a mixture of 2 or more resins and uniaxially or biaxially stretched by a tenter system, a tubular system or the like, are preferable as uniaxially stretched films in the transport direction (direction of flow れ) of the stretched films. In addition, these films may be foamed films.

In the present invention, from the viewpoint of high heat insulation properties, a stretched polyester film, a stretched polystyrene film, a stretched polyolefin film, a polylactic acid film, a foamed polyolefin film, a stretched polyester-polystyrene co-extruded film, a foamed polystyrene film, a polyester-polystyrene multilayer film, or the like may be suitably used, or a laminated film of a nonwoven fabric and the above-described films may be used. The stretched film may be uniaxially stretched or biaxially stretched, and in the case of the uniaxially stretched film, it may be uniaxially stretched in the longitudinal direction or uniaxially stretched in the transverse direction.

The thickness of the shrink label may be, for example, about 10 μm to 80 μm in a state of being attached to the composite container 10A, but is not limited thereto.

The elastic label may be wound so as to cover the entire area or a partial area of the container body 10 and/or the plastic member 40, as in the shrink label. The elastic label is fitted to the composite container 10A in a state stretched in the circumferential direction, and then contracted by removing the stretching force, and wound from the composite container 10A, whereby the elastic label can be obtained.

The elastic label can be produced using a thermoplastic resin film having appropriate flexibility, for example, a single-layer or multilayer resin film made of a polyolefin resin such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, low-density linear polyethylene, or polypropylene. Among them, it is preferable to use a single-layer film made of low-density linear polyethylene and a multilayer film having a layer made of low-density linear polyethylene. These films can be made using the methods described above.

The thickness of the elastic label may be, for example, about 5 μm to 50 μm in a state of being attached to the composite container 10A, but is not limited thereto.

The roll label and the adhesive label may be wound so as to cover the entire area or a partial area of the container body 10 and/or the plastic member 40, as in the shrink label. The roll label can be obtained by winding a resin film around a composite container and bonding or welding the ends of the resin film. The adhesive label can be obtained by directly adhering a resin film to the composite container with an adhesive or the like.

The roll label and the adhesive label can be produced by using the above-described resin film. Examples of the adhesive include a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, a polyamide adhesive, a polyimide adhesive, an amino resin adhesive, a phenol resin adhesive, an epoxy adhesive, a urethane adhesive, a rubber adhesive, and a silicone adhesive.

The thickness of the roll label and the adhesive label may be, for example, about 5 μm to 100 μm in a state of being attached to the composite container 10A, but is not limited thereto.

The paper label may be wound so as to cover the entire area or a partial area of the container body 10 and/or the plastic member 40, as in the shrink label. The paper label can be obtained by directly sticking a resin film to the composite container with an adhesive or the like, as in the case of the adhesive label.

The paper label is preferably made of paper containing a polyisocyanate compound or the like and having excellent water resistance.

The thickness of the paper label may be, for example, about 50 μm to 300 μm in a state of being attached to the composite container 10A, but is not limited thereto.

The hanging label can be obtained by hanging a resin film label or a paper label from the neck portion 13 of the composite container 10A with a string or the like. The size, thickness, and the like of the label are not particularly limited, and a label having any size and thickness can be used.

(Compound preform 70)

Next, the structure of the composite preform 70 in the present embodiment will be described with reference to fig. 4.

As shown in fig. 4, the composite preform 70 includes a preform 10a made of a plastic material and a bottomed cylindrical plastic member 40a provided outside the preform 10 a.

In one embodiment, as shown in fig. 9, a surface protective layer 80a may be provided on the surface of the plastic member 40 a.

(preform 10a)

The preform 10a includes a mouth portion 11a, a body portion 20a connected to the mouth portion 11a, and a bottom portion 30a connected to the body portion 20 a.

The mouth portion 11a corresponds to the mouth portion 11 of the container body 10 and has substantially the same shape as the mouth portion 11.

The body portion 20a has a substantially cylindrical shape corresponding to the neck portion 13, the shoulder portion 12, and the body portion 20 of the container body 10.

The bottom 30a corresponds to the bottom 30 of the container body 10 and has a substantially hemispherical shape.

(Plastic component 40a)

The plastic member 40a is attached so as not to adhere to the outer surface of the preform 10a, and is closely attached to the preform 10a to such an extent that it does not move or rotate, or to such an extent that it does not fall down due to its own weight. The plastic member 40a is provided so as to surround the preform 10a over the entire circumferential region thereof, and has a circular horizontal cross section.

In this case, the plastic member 40a is provided so as to cover the entire region of the body portion 20a except for the portion 13a corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30 a.

The plastic member 40a may be provided in the entire area or a partial area other than the mouth portion 11 a. For example, the plastic member 40a may be provided so as to cover the entire region of the body portion 20a and the bottom portion 30a except for the mouth portion 11 a. The number of plastic members 40a is not limited to 1, and may be 2 or more. For example, 2 plastic members 40a may be provided at 2 positions outside the main body portion 20 a.

The plastic member 40a (40) may be a member having no action of shrinking with respect to the preform 10a (container body 10) or may be a member (shrink tube) having an action of shrinking with respect to the preform 10 a. The plastic member 40a (40) is preferably a member (shrink tube) having a function of shrinking with respect to the preform 10a (container body 10) in view of a small amount of air entering between the container body 10 and the plastic member 40 after blow molding, that is, high adhesion.

In the former case, as the plastic member 40a, for example, a blow pipe manufactured by blow molding, a sheet molding pipe (シート molding チューブ) manufactured by a sheet molding method such as deep drawing, an extrusion pipe manufactured by extrusion molding, a blow molding pipe manufactured by molding a resin sheet obtained by blow molding, an injection molding pipe manufactured by injection molding, and the like can be used, but the plastic member is not limited to these, and molding methods other than the above-described methods can be used.

On the other hand, in the case where the plastic member (shrink tube) 40a has a shrinking action, for example, a member that shrinks (e.g., heat-shrinks) with respect to the preform 10a when an external action (e.g., heat) is applied may be used as the plastic member (shrink tube) 40 a. Or the plastic member (shrink tube) 40 itself has a contractibility or elasticity and can be shrunk without applying an external action.

The plastic member 40a may be formed of a single layer or a plurality of layers.

The plastic part 40a preferably includes a plurality of layers including an inner surface layer 45, an intermediate layer 46, and an outer surface layer 47. It should be noted that these layers may be bonded via an adhesive layer.

In one embodiment, the plastic member 40a includes a colored layer and/or a printed layer having a printed region (printed region 44 a).

The print region 44a may be formed outside or inside each layer of the plastic member 40 a.

For example, the printing region 44a may be formed outside the outer layer 47 (see fig. 10(a)), or the printing region 44a may be formed inside the outer layer (see fig. 10 (b)).

Further, the printing region 44a may be formed outside the middle layer 46 (see fig. 10 c), or the printing region 44a may be formed inside thereof (see fig. 10 d).

Further, the printing region 44a may be formed outside the inner layer 45 (see fig. 10(e)), or the printing region 44a may be formed inside thereof (see fig. 10 (f)).

For example, the plastic member 40a may be printed (the printed region 44a is formed) by the following method.

First, as shown in fig. 11, in the case where printing is performed on the inner side of the intermediate layer 46, before the inner layer 45 and the outer layer 47 are laminated, an ink jet nozzle 44 is inserted into the inner side of the plastic resin tube forming the intermediate layer 46, and printing is performed by an ink jet method (see fig. 11(a)), and then the inner layer 41 and the intermediate layer 46 are laminated via an adhesive (see fig. 11 (b)).

Next, the outer surface layer 47 is laminated through an adhesive (see fig. 11 c), whereby the plastic member 40a printed on the inner side of the intermediate layer 46 can be obtained (fig. 11 d).

Examples of the adhesive include a polyvinyl acetate adhesive, a polyacrylate adhesive, a cyanoacrylate adhesive, an ethylene copolymer adhesive, a cellulose adhesive, a polyester adhesive, a polyamide adhesive, a polyimide adhesive, an amino resin adhesive, a phenol resin adhesive, an epoxy adhesive, a urethane adhesive, a rubber adhesive, and a silicone adhesive.

When printing is performed on the outer side of the plastic member 40a, the printing region 44a may be formed by direct printing using an ink jet printer.

In one embodiment, a printer that performs printing on the outer side of the plastic part 40a (composite preform 70) to which the preform 10a is attached may be used. In one embodiment, a printing press has: a machine head for mounting the composite preform and simultaneously rotating (rotating and revolving) the preform; an ink spraying part for spraying ink to a plastic component 40a mounted on a machine head; and an ink curing section for curing the attached ink. In this case, the plastic member 40a of the composite preform 70 attached to the head is sprayed with the ink on the ink spraying portion while rotating and revolving. Thereafter, the composite preform 70 is raised in the head, and the ink is cured, for example, by UV, in the ink curing portion. Thereby, the printing region 44a is provided on the outer side of the plastic member 40 a.

In other embodiments, the printing press has more than 2 rollers that convey the composite preform 70 while rotating (rotating and revolving). The 2 or more rollers include an ink spraying roller that sprays ink, and an ink curing roller that cures the attached ink. In this case, the composite preform 70 is sequentially conveyed by the ink-jet rollers while being sprayed with ink by the ink-jet portions of the ink-jet rollers. And thereafter to an ink curing roller where the ink is cured, for example, by UV. Thereby, the printing region 43a is provided on the outer side of the plastic member 40 a.

The plastic member 40 included in the blow molded composite container 10A may be printed.

For example, in one embodiment, printing may be performed on the plastic part 40 by using a printer having: a head for mounting the composite container 10A while rotating (rotating and revolving); an ink spraying section for spraying ink on the surface of the plastic member 40 of the composite container 10A attached to the head; and an ink curing section for curing the attached ink.

In this case, the plastic member 40 of the composite container 10A attached to the head is sprayed with the ink on the ink spraying part while rotating and revolving. Thereafter, the composite container 10A is raised in the head, and the ink is cured, for example, by UV, in the ink curing portion. Thereby, printing is performed on the outside of the plastic member 40.

In addition, in another embodiment, the printing press has 2 or more rollers that convey the composite container 10A while rotating (rotating and revolving) the composite container 10A. The 2 or more rollers include an ink spraying roller that sprays ink containing a gas barrier ink composition, and an ink curing roller that cures the ink adhering to the composite container 10A. In this case, the composite container 10A is sprayed with the ink containing the gas barrier ink composition by the ink spraying portions of the ink spraying rollers while being sequentially conveyed by the ink spraying rollers. Thereafter, the composite container 10A is conveyed to an ink curing roller where the ink is, for example, UV cured. Thereby, printing is performed on the outer side of the plastic member 40.

The ink used for forming the printed region 44(44a) is not particularly limited, and an ink having gas barrier properties (i.e., gas permeation barrier properties) is preferable. This can improve the gas barrier properties such as oxygen barrier properties and water vapor barrier properties of the composite container. More specifically, oxygen can be prevented from entering the container to prevent the content liquid from deteriorating, and water vapor can be prevented from evaporating from the inside of the container to the outside to prevent the content amount from decreasing.

The ink may contain a colorant of brown, black, green, white, red or blue as a colorant. The colorant may be a pigment or a dye, and is preferably a pigment in terms of light resistance. Among the above colorants, white pigments such as titanium white, aluminum powder, mica powder, zinc sulfide, zinc white, calcium carbonate, kaolin, talc and the like as light-reflective pigments are preferable; as the light absorbing pigment, there are colored pigments such as carbon black, ceramic black, bone carbon and the like. By using the ink containing these pigments, the visible light transmittance of the plastic part 40 after blow molding can be reduced, and the quality of the content liquid filled in the composite container 10A can be prevented from changing. The content of the colorant in the ink is preferably 0.01 to 30% by mass, more preferably 1 to 10% by mass.

The ink preferably contains a thermosetting resin or an ionizing radiation curable resin, and an ionizing radiation curable resin is more preferred in view of high surface hardness and excellent productivity. The thermosetting resin may be used in combination with the ionizing radiation-curable resin.

Examples of the ionizing radiation-curable resin include polyester resins, polyether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and polyols, which are capable of undergoing a polymerization crosslinking reaction upon irradiation with ionizing radiation such as ultraviolet rays or electron beams.

Among them, the ultraviolet curable resin is preferable because of its high followability and low possibility of generating defects such as cracks by blow molding.

Examples of the ultraviolet curable resin include: ethyl (meth) acrylate having 1 unsaturated bond, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone and the like; trimethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and the like having 2 or more unsaturated bonds; or a reaction product of the above compound with (meth) acrylate or the like.

In the present specification, "(meth) acrylate" means methacrylate and acrylate. Further, it is preferable to use these resins in combination with a photopolymerization initiator, and examples thereof include acetophenones, benzophenones, benzoins, and the like.

Examples of the thermosetting resin include phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea-formaldehyde cocondensate resin, silicone resin, and polysiloxane resin. Further, it is preferable to use these resins in combination with a thermal polymerization initiator, a curing accelerator, a curing agent, and the like.

The total content of the thermosetting resin and the ionizing radiation curable resin in the ink is preferably 1 to 20% by mass, more preferably 1 to 10% by mass.

The printing may be repeated a plurality of times. Thus, even after the print layer 44a is spread after blow molding, printing such as design or printing can be clearly displayed.

Before printing, the plastic member 40a (40) is preferably subjected to surface treatment such as corona treatment, low-temperature plasma treatment, or flame treatment at the position where the printing region 44a (44) is formed. By performing such surface treatment, wettability of the surface of the resin film or resin tube is improved, and print quality can be improved. The surface of the plastic member 40a may be subjected to such a treatment, not limited to the resin film or the resin tube.

Further, it is preferable to form an anchor coat layer in advance in the printing region 44(44a) of the plastic member 40(40 a). When the anchor coat layer is provided, the adhesion of the ink to the plastic member 40(40a) is improved. Therefore, it is not necessary to perform a pretreatment such as corona treatment. Furthermore, ink bleeding of printing can also be reduced by providing the anchor coating layer.

The anchor coating layer may be formed using an anchor coating agent known in the art. In addition, the anchor coating may be formed, for example, as follows: the anchor coating layer can be formed by applying a coating liquid containing the anchor coating agent to the plastic member 40a (40) by an ink jet method, irradiating the coating liquid with ionizing radiation, and curing the coating liquid.

Further, it is preferable to form a surface protection layer 80a on the surface of the plastic member 40a (40) at a position where printing is applied. By forming the surface protection layer 80a on the surface of the plastic component 40a (40), it is possible to effectively prevent a trouble with time such as printing applied to the plastic component 40a (40), and to improve the durability of the composite container.

The surface protection layer 80a is preferably made of a thermosetting resin or an ionizing radiation curable resin, and an ionizing radiation curable resin is more preferable in terms of high surface hardness and excellent productivity. The thermosetting resin may be used in combination with the ionizing radiation-curable resin. As the thermosetting resin and the ionizing radiation curing resin, the above-mentioned resins can be used. The surface protection layer 80a may be formed, for example, as follows: the surface protective layer can be formed by applying a coating liquid containing the above resin to the printing portion on the surface of the plastic member 40a (40) by an ink jet method, and irradiating the coating liquid with, for example, an ionizing radiation to cure the coating liquid.

Next, the shape of the plastic member 40a will be described.

As shown in fig. 12(a), the plastic member 40a is formed in a bottomed cylindrical shape as a whole, and may have a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41.

In this case, since the bottom portion 42 of the plastic member 40A covers the bottom portion 30A of the preform 10A, various functions and characteristics can be imparted to the bottom portion 30 in addition to the main body portion 20 of the composite container 10A. Examples of the plastic member 40a include the above-mentioned blow molded tube and sheet molded tube (シート molding チューブ).

As shown in fig. 12 b, the plastic member 40a may be formed in a circular tube shape (bottomless cylindrical shape) as a whole, and may have a cylindrical barrel portion 41. In this case, as the plastic member 40a, for example, the above-described blow pipe, extrusion pipe, inflation molded pipe, and sheet molded pipe can be used.

As shown in fig. 12(c) and 12(d), the plastic member 40a may be formed by forming a film into a cylindrical shape and attaching the end portion thereof. In this case, the plastic member 40a may be formed in a tubular shape (bottomless cylindrical shape) having the main body portion 41 as shown in fig. 12 c, or may be formed in a bottomed cylindrical shape by attaching the bottom portion 42 as shown in fig. 12 d. In this case, as the plastic member 40a, for example, a blow molded tube, an extruded tube, a blow molded tube, or a sheet molded tube can be used.

Next, a method for manufacturing the plastic member 40a will be described.

In one embodiment, the plastic member 40a can be manufactured by molding a resin sheet containing a resin material and, if necessary, a colorant or the like.

Examples of the molding method include deep drawing, molding a resin sheet into a tubular shape, and welding or bonding the ends of the resin sheet.

The plastic component 40a having a multilayer structure can be obtained by molding a laminated resin sheet in which 2 or more layers of resin sheets are laminated with the adhesive.

Examples of the adhesive used include polyvinyl acetate adhesive, polyacrylate adhesive, cyanoacrylate adhesive, ethylene copolymer adhesive, cellulose adhesive, polyester adhesive, polyamide adhesive, polyimide adhesive, amino resin adhesive, phenol resin adhesive, epoxy adhesive, urethane adhesive, rubber adhesive, and silicone adhesive. The adhesive can be applied by a coating method such as a roll coating method, a gravure roll coating method, or a kiss coating method, a printing method, or the like.

The resin sheet may be a commercially available resin sheet or may be produced by a conventionally known method. In the present invention, it is preferably produced by extrusion molding, and the extrusion molding is preferably performed by a T-die method or an inflation method.

In one embodiment, the plastic member 40a may be manufactured by extruding a mixture containing a resin material melted by heating and, if necessary, a coloring agent or the like into a tubular shape.

In this case, the plastic member 40a having a multilayer structure can be obtained by co-extruding 2 or more kinds of resin materials. Further, the plastic member 40a can also be obtained as follows: the mixture is extruded in a die, and blow molding is performed in the die so as to expand the diameter along the inner surface of the die, thereby obtaining a plastic member 40 a.

Further, the plastic member 40a having shrinkability can also be obtained as follows.

First, a mixture containing the above resin material and the like is extruded, and one end of the pipe thus obtained is sealed by adhesion, welding, or the like. A tube having one end closed is placed in a tubular mold having an inner diameter larger than an outer diameter of the tube, and a blow-out device is placed at the other end of the tube. In this case, the blow-out device is preferably closely attached to the pipe so that gas does not leak from between the blow-out device and the pipe.

Then, the tube, the mold and the blow-spray device were directly fed into a heating furnace in this arrangement, and heated at 70 to 150 ℃ in the heating furnace. As the heating furnace, a hot air circulation type heating furnace may be used in order to make the inside of the heating furnace uniform in temperature. Alternatively, the tube, die and blow-out device may be heated by passing them through a heated liquid. Next, the tube, the mold, and the blow-out device are taken out of the heating furnace, and a gas is blown out of the blow-out device into the tube, thereby pressurizing and stretching the inner surface of the tube. This expands the tube and expands the diameter along the inner surface shape of the mold. Thereafter, the tube was cooled in cold water while keeping the gas ejected from the blow-out device, and the tube was taken out of the mold. By cutting the plastic material into a desired size, a plastic part 40a having shrinkability is obtained.

In one embodiment, the plastic member 40a may be obtained by injection molding. Specifically, the resin material is first heated and melted. Next, the resin material melted by heating is injected into a mold. The plastic part 40a can also be obtained by cooling and removing the plastic part from the mold.

(method of manufacturing composite Container 10A)

Next, a method for manufacturing the composite container 10A (blow molding method) according to the present embodiment will be described with reference to fig. 13(a) to (f).

First, a preform 10a made of a plastic material is prepared (see fig. 13 (a)). In this case, the preform 10a can be produced by an injection molding method using, for example, an injection molding machine not shown. As the preform 10a, a conventionally used preform may be used.

Next, by providing the plastic member 40a on the outer side of the preform 10a, a composite preform 70 having the preform 10a and the plastic member 40a closely adhered to the outer side of the preform 10a is produced (see fig. 13 (b)).

In this case, the plastic member 40a is formed of a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member 40a is attached so as to cover the entire region of the body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30 a.

In this case, the plastic member 40a having an inner diameter equal to or slightly smaller than the outer diameter of the preform 10a is pushed into the preform 10a, whereby the plastic member 40a can be brought into close contact with the outer surface of the preform 10 a.

Alternatively, as described later, the plastic member 40a having heat shrinkability may be provided on the outer surface of the preform 10a, and the plastic member 40a may be heated at 50 to 100 ℃ to be heat-shrunk and brought into close contact with the outer surface of the preform 10 a.

In this way, by previously bonding the plastic member 40A to the outside of the preform 10A to produce the composite preform 70, a series of steps (fig. 13(a) to (b)) for producing the composite preform 70 and a series of steps (fig. 13(c) to (f)) for producing the composite container 10A by blow molding can be performed at different places (factories, etc.).

Next, the composite preform 70 is heated by the heating device 51 (see fig. 13 (c)). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the heating device 51 while being rotated with the mouth 11a facing downward. In this heating step, the preform 10a and the plastic member 40a may be heated at a temperature of, for example, 90 to 130 ℃.

Next, the composite preform 70 heated by the heating device 51 is sent to the blow mold 50 (see fig. 13 (d)).

The composite container 10A is molded using the blow mold 50. In this case, the blow mold 50 is constituted by a pair of body molds 50a, 50b and a bottom mold 50c which are separated from each other (see fig. 13 (d)). In fig. 13(d), the pair of body molds 50a and 50b are separated from each other, and the bottom mold 50c is lifted upward. In this state, the composite preform 70 is inserted between the pair of body molds 50a and 50 b.

Next, as shown in fig. 13(e), the bottom mold 50c is dropped, and then the pair of body molds 50a and 50b are closed, thereby forming the blow mold 50 closed by the pair of body molds 50a and 50b and the bottom mold 50 c. Subsequently, air is pressed into the preform 10a to perform biaxial orientation blow molding of the composite preform 70.

Thus, the container body 10 is obtained from the preform 10a in the blow mold 50. Meanwhile, the body molds 50a and 50b are heated to 30 to 80 ℃ and the bottom mold 50c is cooled to 5 to 25 ℃. At this time, the preform 10a of the composite preform 70 and the plastic member 40a are expanded into an integral body in the blow mold 50. Thereby, the preform 10a and the plastic member 40a are integrated and shaped into a shape corresponding to the inner surface of the blow mold 50.

This provides a composite container 10A including the container body 10 and the plastic member 40 provided on the outer surface of the container body 10.

Next, as shown in fig. 13(f), the pair of body molds 50A and 50b and the bottom mold 50c are separated from each other, and the composite container 10A is taken out from the blow mold 50.

(modification of the method for manufacturing composite Container 10A)

Next, a modification of the blow molding method (the method of manufacturing the composite container 10A) according to the present embodiment will be described with reference to fig. 14(a) to (f).

In the modification shown in fig. 14(a) to (f), the plastic member 40a is a member (shrink tube) having a function of shrinking with respect to the preform 10a, and the other configurations are substantially the same as those shown in fig. 13(a) to (f). In fig. 14(a) to (f), the same portions as those in fig. 13(a) to (f) are denoted by the same reference numerals, and detailed description thereof is omitted.

First, a preform 10a made of a plastic material is prepared (see fig. 14 (a)).

Next, a plastic member (shrink tube) 40a composed of 2 or more layers, at least 1 of the 2 or more layers being a colored layer, is provided on the outer side of the preform 10a (see fig. 14 (b)).

In this case, the plastic member (shrink tube) 40a is formed in a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member (shrink tube) 40 is attached so as to cover the entire region of the body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30 a.

Next, the preform 10a and the plastic member (shrink tube) 40a are heated by the heating device 51 (see fig. 14 (c)).

At this time, the preform 10a and the plastic member (shrink tube) 40a are uniformly heated in the circumferential direction by the heating device 51 while being rotated with the mouth 11a facing downward. In this heating step, the preform 10a and the plastic member (shrink tube) 40a may be heated to, for example, 90 to 130 ℃.

Thus, the plastic member (shrink tube) 40a is heated, whereby the plastic member (shrink tube) 40a is thermally shrunk and closely contacts the outside of the preform 10a (see fig. 14 (c)).

In the case where the plastic member (shrink tube) 40a itself has a contractibility, the plastic member (shrink tube) 40a can be brought into close contact with the outside of the preform 10a at the time when the plastic member (shrink tube) 40a is disposed outside the preform 10a (see fig. 14 b).

Next, the preform 10a and the plastic part (shrink tube) 40a heated by the heating device 51 are sent to the blow mold 50 (see fig. 14 (d)).

The preform 10A and the plastic member (shrink tube) 40A are molded by using the blow mold 50, and a composite container 10A including the container body 10 and the plastic member (shrink tube) 40 provided on the outer surface of the container body 10 is obtained substantially in the same manner as in the cases of fig. 13(a) to (f) (see fig. 14(d) to (f)).

(other modification of the method for manufacturing composite Container 10A)

Next, another modification of the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment will be described with reference to fig. 15(a) to (g).

In the modification shown in fig. 15(a) to (g), the plastic member 40a is a member (shrink tube) having a function of shrinking with respect to the preform 10a, and the preform 10a and the plastic member (shrink tube) 40a are heated in two stages, and the other configurations are substantially the same as the configurations shown in fig. 13(a) to (f). In fig. 15(a) to (g), the same portions as those in fig. 13(a) to (f) are denoted by the same reference numerals, and detailed description thereof is omitted.

First, a preform 10a made of a plastic material is prepared (see fig. 15 (a)).

Next, a plastic member (shrink tube) 40a is provided outside the preform 10a (see fig. 15 (b)). In this case, the plastic member (shrink tube) 40a is formed in a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 41 and a bottom portion 42 connected to the body portion 41. The plastic member (shrink tube) 40 is attached so as to cover the entire region of the body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30 a.

Next, the preform 10a and the plastic member (shrink tube) 40a are heated by the first heating device 55 (see fig. 15 (c)). In this case, the heating temperature of the preform 10a and the plastic member (shrink tube) 40a may be, for example, 50 to 100 ℃.

By heating the plastic member (shrink tube) 40a, the plastic member (shrink tube) 40a is thermally shrunk and is brought into close contact with the outside of the preform 10 a. A composite preform 70 having the preform 10a and the plastic member (shrink tube) 40a closely attached to the outside of the preform 10a is thus obtained (see fig. 15 (c)).

In this manner, by producing the composite preform 70 by heating and closely bonding the plastic member (shrink tube) 40A to the outside of the preform 10A in advance using the first heating device 55, a series of steps (fig. 15(a) to (c)) for producing the composite preform 70 and a series of steps (fig. 15(d) to (g)) for producing the composite container 10A by blow molding can be performed at different places (factories, etc.).

Next, the composite preform 70 is heated by the second heating device 51 (see fig. 15 (d)). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the second heating device 51 while being rotated with the mouth portion 11a facing downward. In this heating step, the preform 10a and the plastic member (shrink tube) 40a may be heated at a temperature of, for example, 90 to 130 ℃.

Next, the composite preform 70 heated by the second heating device 51 is sent to the blow mold 50 (see fig. 15 (e)).

The composite preform 70 is molded using the blow mold 50, and a composite container 10A including the container body 10 and the shrinkable tube 40 provided on the outer surface of the container body 10 is obtained in substantially the same manner as in the cases of fig. 13(a) to (f) (see fig. 15(e) to (g)).

As described above, according to the present embodiment, the composite preform 70 is blow molded in the blow mold 50, whereby the preform 10A of the composite preform 70 and the plastic member 40A are expanded integrally, and the composite container 10A including the container body 10 and the plastic member 40 is manufactured. Thus, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be formed of different members. Therefore, by appropriately selecting the type and shape of the plastic member 40, various functions and characteristics can be arbitrarily given to the composite container 10A.

In addition, according to the present embodiment, since a normal blow molding apparatus can be used as it is when producing the composite container 10A, it is not necessary to prepare a new molding facility in order to produce the composite container 10A.

Modification of the first embodiment

Next, a modification of the first embodiment of the present invention will be described with reference to fig. 16, 17, and 18(a) to (f).

In the modification shown in fig. 16, 17, and 18(a) to (f), the plastic member 40a is not a member having a body portion and a bottom portion, but a cylindrical plastic member 40a is used.

In the composite container 10A shown in fig. 16, the plastic member 40 extends from the shoulder portion 12 of the container body 10 to the lower portion of the body portion 20, but does not reach the bottom portion 30. In the composite preform 70 shown in fig. 17, the plastic member 40a is closely attached so as to cover only the main body portion 20a of the preform 10a, and more specifically, the plastic member 40a covers a region of the main body portion 20a except for a portion 13a corresponding to the neck portion 13 of the container body 10 and a portion corresponding to a lower portion of the main body portion 20 a.

The other configurations in fig. 16, 17, and 18(a) to (f) are substantially the same as those of the embodiment shown in fig. 1 to 15. In the modification examples shown in fig. 16, 17, and 18(a) to (f), the same portions as those of the embodiment shown in fig. 1 to 15 are given the same reference numerals, and detailed description thereof is omitted.

The configuration and manufacturing method of the composite container 10A and the configuration and manufacturing method of the composite preform 70 are substantially the same as those of the embodiment shown in fig. 1 to 15, and thus detailed description thereof is omitted. In fig. 16, 17, and 18(a) to (f), the plastic member 40a may have a function of shrinking with respect to the preform 10 a.

Second embodiment

Next, a second embodiment of the present invention will be described with reference to the drawings. Fig. 19 to 28 are views showing a second embodiment of the present invention. In fig. 19 to 28, the same portions as those of the first embodiment are assigned the same reference numerals, and detailed description thereof is omitted.

(composite container 10A)

First, an outline of a composite container manufactured by the blow molding method according to the present embodiment will be described with reference to fig. 19 and 20.

As described below, the composite container 10A shown in fig. 19 and 20 is obtained as follows: a composite preform 70 (see fig. 21) including the preform 10A, the inner label member 60A, and the plastic member 40A is subjected to biaxial stretching blow molding using a blow mold 50, so that the preform 10A, the inner label member 60A, and the plastic member 40A of the composite preform 70 are integrally expanded, thereby obtaining a composite container 10A.

Such a composite container 10A includes: a container body 10 made of a plastic material positioned inside, an inner label member 60 provided in close contact with the outside of the container body 10, and a plastic member 40 provided in close contact with the outside of the inner label member 60.

(Container main body 10)

The container body 10 includes a mouth portion 11, a neck portion 13 provided below the mouth portion 11, a shoulder portion 12 provided below the neck portion 13, a body portion 20 provided below the shoulder portion 12, and a bottom portion 30 provided below the body portion 20.

On the other hand, the inner label member 60 is closely attached to the outer surface of the container body 10 in a thinly spread state, and is closely attached to the container body 10 to such an extent that the movement or rotation thereof is not easily generated.

The plastic member 40 is closely attached to the outer surface of the container body 10 and the outer surface of the inner label member 60 in a thinly spread state to such an extent that the movement or rotation with respect to the container body 10 is not easily generated.

It is contemplated that at least a portion of the plastic component 40 may be translucent or transparent. In this case, the inner label member 60 can be seen from the outside through the translucent or transparent portion. The plastic member 40 may be translucent or transparent as a whole, or may have an opaque portion and a translucent portion or a transparent portion (e.g., a window portion). In the present embodiment, a case where the entire plastic member 40 is transparent will be described as an example.

(inner label member 60)

The inner label member 60 will be described next. The inside label member 60 is obtained as follows: the inner label member 60 is obtained by disposing the inner label member 60a so as to surround the outer side of the preform 10a and biaxially stretch blow molding the preform 10a and the inner label member 60a into one body.

The inner label member 60 is attached so as not to adhere to the outer surface of the container body 10, and is closely adhered to the container body 10 to such an extent that it does not move or rotate. The inner label member 60 is thinly spread on the outside of the container body 10 to cover the container body 10. As shown in fig. 19, the inner label member 60 is provided so as to surround the container body 10 over the entire circumferential region thereof, and has a substantially circular horizontal cross section.

In this case, the inner label member 60 is provided so as to cover the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10 except the mouth portion 11 and the neck portion 13. This makes it possible to provide desired characters, images, and the like to the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10, and to provide the composite container 10A with decorative properties or to display information.

The inner label member 60 may be provided in the entire area or a partial area of the container body 10 excluding the mouth portion 11. For example, the inner label member 60 may be provided in such a manner as to cover the entire region of the neck portion 13, the shoulder portion 12, the body portion 20, and the bottom portion 30 of the container body 10 except for the mouth portion 11. The number of the inner label member 60 is not limited to 1, and a plurality of inner label members may be provided. The inner label member 60 may be provided in the same region as the plastic member 40 or in a region narrower than the plastic member 40. In the latter case, the inner label member 60 is preferably completely covered with the plastic member 40.

The thickness of the inner label member 60 may be, for example, about 5 μm to 50 μm in a state of being attached to the container body 10, but is not limited thereto.

(Plastic component 40)

Next, the plastic member 40 will be described. The plastic member 40 is obtained as follows: the plastic member 40a is provided so as to surround the outer side of the inner label member 60a, and the preform 10a, the inner label member 60a, and the plastic member 40a are biaxially stretch blow molded into a single body to obtain the plastic member 40.

The plastic member 40 is attached so as not to adhere to the outer surface of the inner label member 60, and is closely adhered to the container body 10 to such an extent that it does not move or rotate. The plastic member 40 is thinly spread on the outer surface of the inner label member 60 to cover the inner label member 60. As shown in fig. 20, the plastic member 40 is provided so as to surround the entire circumferential region of the container body 10, and has a substantially circular horizontal cross section.

The configurations of the container body 10 and the plastic member 40 are substantially the same as those of the first embodiment, and therefore, a detailed description thereof is omitted.

(Compound preform 70)

Next, the structure of the composite preform 70 of the present embodiment will be described with reference to fig. 21.

As shown in fig. 21, the composite preform 70 includes: the label is composed of a preform 10a made of a plastic material, a bottomed cylindrical inner label member 60a closely attached to the outside of the preform 10a, and a bottomed cylindrical plastic member 40a composed of 2 or more layers closely attached to the outside of the inner label member 60 a.

(inner label part 60a)

The inner label member 60a is closely attached to the outer surface of the preform 10a so as to be closely attached to the preform 10a in a state where it is not easily moved or rotated. The inner label member 60a is provided so as to surround the preform 10a over the entire circumferential region thereof, and has a substantially circular horizontal cross section.

The inner label member 60a may be designed or printed in advance. For example, in addition to the pattern, the product name, and the like, text information such as the name of the content liquid, the manufacturer, the name of the material, and the like may be described. In this case, after the blow molding, the composite container 10A can display images and characters without separately providing a label or the like to the container body 10. For example, the inner label member 60a may be provided on the entire or a part of the main body portion 20a of the preform 10a so that an image or a character is displayed on the main body portion 20 of the container body 10 after molding. Thus, the step of applying a label by using a labeling machine (ラベラー) is not required after the container is plugged, and thus the production cost can be suppressed and the yield can be prevented from being lowered.

As such an inner label member 60a, a film of a polyester resin, a polyamide resin, a polyaromatic polyamide resin, a polypropylene resin, a polycarbonate resin, a polyacetal resin, a fluorine resin, or the like can be used. The inner label part 60a may be formed of the same material as the preform 10a and/or the plastic part 40a, or may be formed of different materials.

As the inner label member 60a, various materials described below can be used.

For example, the inner label member 60a may be formed of a material having gas barrier properties such as oxygen barrier properties and water vapor barrier properties. In this case, the gas barrier property of the composite container 10A can be improved, and the content liquid due to oxygen and the content decrease due to transpiration of water vapor can be prevented without using a multilayer preform or a preform containing a blend material as the preform 10A. As such a material, PE, PP, MXD-6, EVOH or a mixture of these materials with an oxygen absorbing material such as a fatty acid salt may be considered.

The inner label member 60a may be formed of a material having light-blocking properties such as ultraviolet rays. In this case, the light-blocking property of the composite container 10A can be improved and the content liquid can be prevented from being deteriorated by ultraviolet rays or the like without using a multilayer preform or a preform containing a blend material as the preform 10A. As such a material, a material obtained by blending PET, PE, or PP with a light-shielding resin may be considered.

The inner label member 60a may be made of a material (material with low thermal conductivity) having a higher heat retaining property or cold retaining property than the plastic material constituting the container body 10 (preform 10 a). In this case, the temperature of the content liquid can be made less likely to be transmitted to the surface of the composite container 10A without increasing the thickness of the container body 10 itself. This improves the heat retaining property or the cold retaining property of the composite container 10A. As such a material, there may be considered foamed polyurethane, polystyrene, PE, PP, phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, and the like.

On the other hand, the plastic member 40a is attached so as not to adhere to the outer surface of the inner label member 60a, and is closely adhered to the preform 10a to such an extent that it does not move or rotate. The plastic member 40a is provided so as to surround the preform 10a over the entire circumferential region thereof, and has a substantially circular horizontal cross section.

In this case, the inner label member 60a and the plastic member 40a are provided so as to cover the entire region of the body portion 20a except for the portion 13a corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30 a.

The inner label member 60a and the plastic member 40a may be provided in the entire area or a partial area other than the mouth portion 11 a. For example, the inner label member 60a and the plastic member 40a may be provided so as to cover the entire region of the body portion 20a and the bottom portion 30a except for the mouth portion 11 a. Each of the inner label member 60a and the plastic member 40a is not limited to 1, and may be provided in an amount of 2 or more. For example, 2 inner tag parts 60a and 2 plastic parts 40a may be provided at 2 positions outside the main body part 20a, respectively.

The plastic member 40a may be a member having no action of shrinking with respect to the preform 10a or may be a member having an action of shrinking with respect to the preform 10 a.

In the latter case, the plastic member (shrink tube) 40a may have a function of shrinking the preform 10 a. It is preferable to use a plastic member (shrink tube) 40a that shrinks (e.g., thermally shrinks) with respect to the preform 10a when an external action (e.g., heat) is applied.

The composite container 10A and the composite preform 70 have substantially the same configuration as in the first embodiment, and therefore, a detailed description thereof is omitted.

Next, the shape of the plastic member 40a and/or the inner label member 60a will be described.

As shown in fig. 22 a, the plastic member 40a (inner label member 60a) may be formed in a bottomed cylindrical shape as a whole, and may include a cylindrical body portion 41 (body portion 61) and a bottom portion 42 (bottom portion 62) connected to the body portion 41 (body portion 61). In this case, since the bottom portion 42 (bottom portion 62) of the plastic member 40A (inner label member 60A) covers the bottom portion 30A of the preform 10A, various functions and characteristics can be imparted to the bottom portion 30 in addition to the main body portion 20 of the composite container 10A.

As shown in fig. 22 b, the plastic member 40a (inner label member 60a) may be formed in a circular tube shape (bottomless cylindrical shape) as a whole, and may have a cylindrical body portion 41 (body portion 61). In this case, as the plastic member 40a (inner label member 60a), for example, an extruded tube can be used.

As shown in fig. 22 c and 22 d, the plastic member 40a (inner label member 60a) can be produced by forming a film into a cylindrical shape and attaching the end portion thereof. In this case, the plastic member 40a may be formed in a tubular shape (bottomless cylindrical shape) having the body portion 41 (body portion 61) as shown in fig. 22 c, or may be formed in a bottomed cylindrical shape by attaching the bottom portion 42 (bottom portion 62) as shown in fig. 22 d.

(method of manufacturing composite Container 10A)

Next, a method for manufacturing the composite container 10A (blow molding method) according to the present embodiment will be described with reference to fig. 23(a) to (f).

First, a preform 10a made of a plastic material is prepared (see fig. 23 (a)).

Next, an inner label member 60a is provided on the outer side of the preform 10a, and a plastic member 40a is provided on the outer side of the inner label member 60a, the plastic member 40a being composed of 2 or more layers, at least 1 of the 2 or more layers being a colored layer. In this way, a composite preform 70 is produced (see fig. 23(b)), the composite preform 70 having the preform 10a, the inner label member 60a closely attached to the outer side of the preform 10a, and the plastic member 40a closely attached to the outer side of the inner label member 60 a. In this case, the inner label member 60a is formed in a bottomed cylindrical shape as a whole, and includes a cylindrical body portion 61 and a bottom portion 62 connected to the body portion 61.

At this time, the inner label member 60a and the plastic member 40a having the same or slightly smaller inner diameter as the outer diameter of the preform 10a can be closely attached to the outer surface of the preform 10a by pushing the inner label member 60a and the plastic member 40a into the preform 10 a. Alternatively, the inner label member 60a and the plastic member 40a having heat shrinkability may be provided on the outer surface of the preform 10a, and the inner label member 60a and the plastic member 40a may be heated at 50 to 100 ℃ to be heat-shrunk and brought into close contact with the outer surface of the preform 10 a.

Alternatively, the plastic member 40a may be provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member 40a may be integrally assembled to the outside of the preform 10 a. Alternatively, the inner label member 60a may be provided on the outer side of the preform 10a, and the plastic member 40a may be provided on the outer side of the inner label member 60 a.

Thus, by previously bonding the plastic member 40A to the outsides of the preform 10A and the inner label member 60A to produce the composite preform 70, a series of steps (fig. 23(a) to (b)) for producing the composite preform 70 and a series of steps (fig. 23(c) to (f)) for producing the composite container 10A by blow molding can be performed at different places (factories, etc.).

Next, the composite preform 70 is heated by the heating device 51 (see fig. 23 (c)).

Subsequently, the composite preform 70 heated by the heating device 51 is fed to the blow mold 50. The composite container 10A is molded using the blow mold 50, and the composite container 10A including the container body 10, the inner label member 60 provided on the outer surface of the container body 10, and the plastic member 40 provided outside the inner label member 60 is obtained substantially in the same manner as in the case of the first embodiment (see fig. 23(d) - (f)).

Note that the method of manufacturing the composite container 10A (blow molding method) according to the present embodiment is substantially the same as that of the first embodiment, and therefore, a detailed description thereof is omitted here.

(modification of the method for manufacturing composite Container 10A)

Next, a modified example of the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment will be described with reference to fig. 24(a) to (f). In the modification shown in fig. 24(a) to (f), the plastic member 40a is a member (shrink tube) having a function of shrinking with respect to the preform 10a, and the other configurations are substantially the same as those shown in fig. 23(a) to (f). In fig. 24(a) to (f), the same portions as those in fig. 23(a) to (f) are denoted by the same reference numerals, and detailed description thereof is omitted.

First, a preform 10a made of a plastic material is prepared (see fig. 24 (a)).

Next, an inner label member 60a is provided on the outer side of the preform 10a, and a plastic member (shrink tube) 40a is provided on the outer side of the inner label member 60 (see fig. 24 (b)). The inside label member 60 and the plastic member (shrink tube) 40a are assembled so as to cover the entire region of the body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30 a. At least a part of the plastic member (shrink tube) 40a may be translucent or transparent.

In this case, a plastic member (shrink tube) 40a may be provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (shrink tube) 40a may be integrally attached to the outside of the preform 10 a. Alternatively, the inner label member 60a may be provided on the outer side of the preform 10a, and thereafter the plastic member (shrink tube) 40a may be provided on the outer side of the inner label member 60.

Next, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a are heated by the heating device 51 (see fig. 24 (c)). At this time, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a are uniformly heated in the circumferential direction by the heating device 51 while being rotated with the mouth 11a facing downward. In this heating step, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a may be heated to, for example, 90 to 130 ℃.

Thus, the plastic member (shrink tube) 40a is heated, whereby the plastic member (shrink tube) 40a is thermally shrunk and closely contacts the outside of the preform 10a (see fig. 24 (c)). When the plastic member (shrink tube) 40a itself has a shrink property, the plastic member (shrink tube) 40a can be brought into close contact with the outside of the inner label member 60a at the time when the plastic member (shrink tube) 40a is disposed outside the inner label member 60a (see fig. 24 b).

Next, the preform 10a, the inner label member 60a and the plastic member (shrink tube) 40a heated by the heating device 51 are fed into the blow mold 50 (see fig. 24 (d)).

The preform 10A, the inner label member 60A, and the plastic member (shrink tube) 40A are molded by using the blow mold 50, and a composite container 10A including the container body 10, the inner label member 60 provided on the outer surface of the container body 10, and the plastic member (shrink tube) 40 provided outside the inner label member 60 is obtained substantially in the same manner as in the cases of fig. 23(a) to (f) (see fig. 24(d) to (f)).

(other modification of the method for manufacturing composite Container 10A)

Next, another modification of the method for manufacturing the composite container 10A (blow molding method) according to the present embodiment will be described with reference to fig. 25(a) to (g). In the modification shown in fig. 25(a) to (g), the plastic member 40a has a function (shrink tube) of shrinking with respect to the preform 10a, and the preform 10a and the plastic member (shrink tube) 40a are heated in two stages, and other configurations are substantially the same as the configurations shown in fig. 23(a) to (f). In fig. 25(a) to (g), the same portions as those in fig. 23(a) to (f) are denoted by the same reference numerals, and detailed description thereof is omitted.

First, a preform 10a made of a plastic material is prepared (see fig. 25 (a)).

Next, an inner label member 60a is provided on the outer side of the preform 10a, and a plastic member (shrink tube) 40a is provided on the outer side of the inner label member 60 (see fig. 25 (b)). The plastic member (shrink tube) 40a is attached so as to cover the entire region of the body portion 20a except for the portion corresponding to the neck portion 13 of the container body 10 and the entire region of the bottom portion 30 a. The plastic member (shrink tube) 40a may be at least partially translucent or transparent.

In this case, a plastic member (shrink tube) 40a may be provided around the inner label member 60a in advance, and the inner label member 60a and the plastic member (shrink tube) 40a may be integrally attached to the outside of the preform 10 a. Alternatively, the inner label member 60a may be provided on the outer side of the preform 10a, and then the plastic member (shrink tube) 40a may be provided on the outer side of the inner label member 60.

Next, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a are heated by the first heating device 55 (see fig. 25 (c)). In this case, the heating temperature of the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a may be, for example, 50 to 100 ℃.

By heating the plastic member (shrink tube) 40a, the plastic member (shrink tube) 40a is thermally shrunk and is brought into close contact with the outside of the preform 10 a. A composite preform 70 having a preform 10a, an inner label member 60a closely fitted to the outer side of the preform 10a, and a plastic member (shrink tube) 40a closely fitted to the outer side of the inner label member 60a is thus obtained (see fig. 25 (c)).

Thus, by using the first heating device 55 to heat and closely adhere the plastic member (shrink tube) 40A to the outside of the preform 10A and the inner label member 60A in advance to produce the composite preform 70, a series of steps (fig. 25(a) to (c)) for producing the composite preform 70 and a series of steps (fig. 25(d) to (g)) for producing the composite container 10A by blow molding can be performed at different places (factories, etc.).

Next, the composite preform 70 is heated by the second heating device 51 (see fig. 25 (d)). At this time, the composite preform 70 is uniformly heated in the circumferential direction by the second heating device 51 while being rotated with the mouth portion 11a facing downward. In this heating step, the preform 10a, the inner label member 60a, and the plastic member (shrink tube) 40a may be heated to, for example, 90 to 130 ℃.

Next, the composite preform 70 heated by the second heating device 51 is sent to the blow mold 50 (see fig. 25 (e)).

The composite preform 70 is molded using the blow mold 50, and a composite container 10A including the container body 10, the inner label member 60 provided on the outer surface of the container body 10, and the plastic member (shrink tube) 40 provided outside the inner label member 60 is obtained in substantially the same manner as in the cases of fig. 23(a) to (f) (see fig. 25(e) to (g)).

As described above, according to the present embodiment, the composite preform 70 is blow molded in the blow mold 50, whereby the preform 10A, the inner label member 60A, and the plastic member 40A of the composite preform 70 are integrally expanded to produce the composite container 10A including the container body 10, the inner label member 60, and the plastic member 40. Therefore, in the stage of manufacturing the composite container 10A using the preform 10A, the inner label member 60 can be provided in the composite container 10A in advance. Thus, it is not necessary to provide a step of applying a label by using a labeling machine after the composite container 10A is filled with the content liquid and the stopper is plugged. This can suppress the manufacturing cost in the manufacture of the final product.

In addition, a reduction in yield in the production of the final product due to a failure of the labeling machine or the like can be prevented.

In addition, according to the present embodiment, the preform 10a (container body 10) and the plastic member 40a (plastic member 40) can be formed of different members. Therefore, by appropriately selecting the type and shape of the plastic member 40, various functions and characteristics can be arbitrarily given to the composite container 10A.

In addition, according to the present embodiment, since a normal blow molding apparatus can be used as it is when producing the composite container 10A, it is not necessary to prepare a new molding facility in order to produce the composite container 10A.

Modification of the second embodiment

Next, a modified example of the present invention will be described with reference to fig. 26, 27, and fig. 28(a) to (f).

In the modification shown in fig. 26, 27 and 28(a) to (f), the inner tag member 60a and the plastic member 40a are not members having a body portion and a bottom portion, but cylindrical inner tag members 60a and plastic members 40a are used.

In the composite container 10A shown in fig. 26, the inner label member 60 and the plastic member 40 extend from the shoulder portion 12 of the container body 10 to the lower portion of the body portion 20, but do not reach the bottom portion 30. In the composite preform 70 shown in fig. 27, the inner label member 60a and the plastic member 40a are closely attached so as to cover only the body portion 20a of the preform 10a, and more specifically, the inner label member 60a and the plastic member 40a cover the body portion 20a except for the portion 13a corresponding to the neck portion 13 of the container body 10 and the portion corresponding to the lower portion of the body portion 20 a.

The other configurations in fig. 26, 27, and 28(a) to (f) are substantially the same as those of the embodiments shown in fig. 19 to 25. In the modification examples shown in fig. 26, 27, and 28(a) to (f), the same portions as those in the embodiment shown in fig. 19 to 25 are given the same reference numerals, and detailed description thereof is omitted.

The configuration and manufacturing method of the composite container 10A and the configuration and manufacturing method of the composite preform 70 are substantially the same as those of the embodiment shown in fig. 19 to 25, and thus detailed description thereof is omitted. In fig. 26, 27 and 28(a) to (f), the plastic member 40 may be a member having a function of shrinking with respect to the preform 10 a.