阅读说明：本技术 地板装饰材料 (Floor decoration material ) 是由 河野晴彦 于 2020-03-12 设计创作，主要内容包括：本发明提供一种地板装饰材料,具备增强层、基材层和表面层,上述增强层由含浸有合成树脂的机织物或无纺布构成,上述基材层和上述表面层由聚氯乙烯系树脂组合物构成。(The invention provides a floor decorative material, comprising a reinforcing layer, a base material layer and a surface layer, wherein the reinforcing layer is made of woven fabric or nonwoven fabric impregnated with synthetic resin, and the base material layer and the surface layer are made of polyvinyl chloride resin composition.)

1. A floor finishing material comprising a reinforcing layer, a base material layer and a surface layer, wherein the reinforcing layer is composed of woven or nonwoven fabric impregnated with synthetic resin, and the base material layer and the surface layer are composed of a polyvinyl chloride resin composition.

2. The floor finishing material according to claim 1, wherein the flexural rigidity measured according to JIS K7106 is 50MPa or more.

3. The floor finishing material according to claim 1 or 2, wherein the weight is 1000g/m²～2300g/m²。

4. The floor finishing material according to any one of claims 1 to 3, wherein the base material layer and the surface layer contain a plasticizer.

5. The floor finishing material according to claim 4, wherein the plasticizer is a polyester-based plasticizer.

6. The floor finishing material according to any one of claims 1 to 5, further comprising a second reinforcing layer made of a nonwoven fabric or a woven fabric.

7. The floor finishing material according to any one of claims 1 to 6, wherein a combustion fuming test (Ds (max)) measured by ASTM E662 is 200 or less, and a combustion toxic gas test (HCl (ppm)) is 150 or less.

8. The floor finishing material according to any one of claims 1 to 7, wherein the reinforcement layer is composed of a woven fabric impregnated with a synthetic resin.

9. The floor finishing material of claim 8, wherein the woven fabric is comprised of glass or carbon.

10. The floor finishing material according to claim 8 or 9, wherein the tex of the yarn for the woven fabric is 30g/1000m to 300g/1000m, and the weaving density of the woven fabric is 10 pieces/25 mm to 30 pieces/25 mm.

11. The floor finishing material according to any one of claims 1 to 10, wherein the synthetic resin is a thermosetting resin.

12. The floor finishing material according to any one of claims 1 to 11, wherein an impregnation amount of the synthetic resin of the reinforcing layer is 20g/m²～60g/m²。

Technical Field

The present invention relates to a floor finishing material used as a finishing material for a floor of a vehicle such as an airplane for transporting various people.

Background

In the floor finishing material for vehicles and airplanes, by using a material which is light in weight while maintaining good physical properties, fuel economy is improved and running cost is reduced.

In general, the floor finishing material is composed of a plurality of layers combined at the same time. In particular, a floor finishing material for an aircraft requires a certain degree of rigidity in order to suppress deformation that may occur during flight, formation of air bubbles on the back surface of the finishing material, and the like, and therefore can be composed of a reinforcing layer that ensures the rigidity of the product. As such a floor finishing material, a multilayer floor finishing material having two reinforcing layers, a layer of reinforcing fibers and a reinforcing layer made of a thermoplastic polymer which is a polyester resin, an acrylic resin or a mixture thereof and which is free of reinforcing fibers, is disclosed (patent document 1).

However, the multi-layer floor finishing material has a complicated manufacturing process because a plurality of resin layers of different kinds are laminated.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016 & 163995.

Disclosure of Invention

The invention provides a floor finishing material which has rigidity capable of enduring impact and deformation, is light and can be easily manufactured.

In order to solve the above problems, the present invention employs the following means.

[1] A floor finishing material comprising a reinforcing layer, a base material layer and a surface layer, wherein the reinforcing layer is composed of woven or nonwoven fabric impregnated with synthetic resin, and the base material layer and the surface layer are composed of a polyvinyl chloride resin composition.

[2] The floor finishing material according to [1], wherein the flexural rigidity measured according to JIS K7106 is 50MPa or more.

[3]According to [1]Or [2]]The floor decorating material has a weight of 1000g/m²～2300g/m²。

[4] The floor finishing material according to any one of [1] to [3], wherein the base material layer and the surface layer contain a plasticizer.

[5] The floor finishing material according to [4], wherein the plasticizer is a polyester plasticizer.

[6] The floor finishing material according to any one of [1] to [5], further comprising a second reinforcing layer made of a nonwoven fabric or a woven fabric.

[7] The floor finishing material according to any one of [1] to [6], wherein a result of a combustion fuming test (Ds (max)) measured according to ASTM E662 is 200 or less, and a result of a combustion toxic gas test (HCl (ppm)) is 150 or less.

[8] The floor finishing material according to any one of [1] to [7], wherein the reinforcing layer is formed of woven fabric impregnated with synthetic resin.

[9] The floor finishing material according to [8], wherein the woven fabric is made of glass or carbon.

[10] The floor finishing material according to [8] or [9], wherein the tex of the yarn for the woven fabric is 30g/1000m to 300g/1000m, and the weaving density of the woven fabric is 10 pieces/25 mm to 30 pieces/25 mm.

[11] The floor finishing material according to any one of [1] to [10], wherein the synthetic resin is a thermosetting resin.

[12]According to [1]～[11]The floor finishing material of any one of the above, wherein the synthetic resin of the reinforcing layer has an impregnation amount of 20g/m²～60g/m²。

The floor finishing material of the present invention has moderate rigidity, is light and has a simple layer structure, and therefore, the floor finishing material can be easily manufactured.

Since the resin layer is composed of 2 layers of the base layer and the surface layer composed of the polyvinyl chloride resin composition, the number of production steps is reduced, and the resin layer can be easily produced.

Drawings

Fig. 1 is a sectional view of a floor finishing material according to an embodiment of the present invention.

Fig. 2 is a sectional view of a floor finishing material according to another embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail. The floor finishing material of the present invention comprises at least a reinforcing layer, a base material layer and a surface layer. The reinforcement layer, the base material layer and the surface layer are laminated to form a whole, thereby forming the floor finishing material.

The floor finishing material of the present invention is characterized by being lightweight and having appropriate rigidity, and is preferable as a floor finishing material for vehicles such as airplanes. As the floor finishing material for such applications, flame resistance, a reduction in the amount of smoke generated during combustion, a reduction in the amount of toxic gas generated, and the like are considered.

The respective configurations of the floor finishing material of the present invention will be explained.

Fig. 1 shows one embodiment of the floor finishing material of the present invention.

The reinforcing layer 1 is made of a composite material of woven or nonwoven fabric and thermosetting or thermoplastic synthetic resin. The reinforcing layer 1 is impregnated with a synthetic resin in a woven fabric or a nonwoven fabric, and gives sufficient rigidity to the floor finishing material.

The woven or nonwoven fabric of the reinforcing layer 1 is composed of natural or synthetic fibers as inorganic or organic substances. Preferably, the fibers are selected from glass, carbon, aramid, polyethylene, sialon, nylon, polyester, acrylic, vinylon, linen, cotton, hemp, and the like. Among these, glass and carbon are more preferable.

Examples of the synthetic resin of the reinforcing layer 1 include thermosetting or thermoplastic synthetic resins selected from polyester resins, phenol resins, epoxy resins, polysulfone resins, vinyl ester resins, acrylic resins, polyamide resins, polycarbonate resins, and mixtures thereof. Among these, thermosetting resins are preferable, and unsaturated polyester resins, phenol resins, epoxy resins, and the like are more preferable.

The reinforcement layer 1 is preferably from 0.2mm to 0.4mm thick. Sufficient bending rigidity can be obtained by setting the thickness to 0.2mm or more, and increase in weight can be easily suppressed by setting the thickness to 0.4mm or lessThe reduction in flexibility is combined with the increase in the degree of difficulty in production. The weight of the reinforcing layer 1 is preferably from 200g/m²To 400g/m²。

The reinforcement layer 1 is preferably disposed at the lowermost layer of the floor finishing material as in the floor finishing material a (floor finishing material a1) of fig. 1. When the floor finishing material a is laid on the floor of the airplane, the reinforcing layer is attached to the floor structure of the main body by an adhesive or an adhesive.

The reinforcing layer 1 is made of a composite material including woven or nonwoven fabric and thermosetting or thermoplastic synthetic resin, and the woven or nonwoven fabric is impregnated with the synthetic resin, and is not particularly limited as long as it is in a cured state. The mesh size of the composite material must not be too small, and forming a mesh of an appropriate size makes it possible to reduce the weight of the reinforcing layer 1 and suppress an increase in the weight of the floor finishing material a. Further, since appropriate flexibility can be provided, it is not easy to limit the manufacturing process of the floor finishing material a.

The reinforcing layer 1 is preferably formed of woven fabric impregnated with synthetic resin. In addition, the woven fabric is preferably made of glass or carbon.

The woven fabric is not particularly limited, and is preferably a plain weave.

Here, the mesh of the woven fabric depends on the tex of the yarn used for the woven fabric, the number of yarns per unit length (25mm), i.e., the weaving density, and the amount of synthetic resin used. The tex of the yarn for the woven fabric is preferably 30g/1000m to 300g/1000m, more preferably 50g/1000m to 200g/1000m, and still more preferably 100g/1000m to 150g/1000 m. The number of threads per unit length (25mm), i.e., the knitting density, is preferably 10 threads/25 mm to 30 threads/25 mm, and more preferably 15 threads/25 mm to 25 threads/25 mm. When the warp and weft knitting densities of the woven fabric are different from each other, it is preferable that either one of the warp knitting density and the weft knitting density is in the above range.

The tex of the yarns used in the woven fabric is 30g/1000m to 300g/1000m, and the weaving density of the woven fabric is preferably 10 yarns/25 mm to 30 yarns/25 mm.

In addition, the amount of the synthetic resin impregnated also affects the flexibility and weight of the floor finishing material A, and therefore the amount of the synthetic resin impregnated into the reinforcing layer 1 is preferably 20g/m²～60g/m²More preferably 30g/m²～50g/m²。

The base layer 2 and the surface layer 3 are made of a polyvinyl chloride resin composition. Polyvinyl chloride resins have flame retardancy among general thermoplastic resins, and are suitable as materials for floor finishing materials for vehicles. The polyvinyl chloride resin composition constituting the base layer 2 and the surface layer 3 may contain a plasticizer because it imparts appropriate flexibility.

Examples of the polyvinyl chloride resin used in the polyvinyl chloride resin composition include a polyvinyl chloride homopolymer resin, a chlorinated polyvinyl chloride resin, a polyvinyl chloride copolymer resin (e.g., a vinyl acetate-vinyl chloride copolymer, an ethylene-vinyl chloride copolymer, etc.), a vinyl chloride graft copolymer (e.g., an ethylene-vinyl acetate-vinyl chloride graft copolymer, a polyurethane-vinyl chloride graft copolymer, etc.), and the like, and these may be used alone or in combination of two or more.

Examples of the plasticizer used in the polyvinyl chloride resin composition include phthalate plasticizers, polyester plasticizers, sulfonate plasticizers, phosphate plasticizers, adipate plasticizers, and epoxy plasticizers. Among these, polyester-based plasticizers are preferable, and the amount of smoke generated during combustion can be suppressed by using polyester-based plasticizers which are polycondensates of aliphatic dibasic acids and glycols.

Examples of the aliphatic dibasic acid of the polyester plasticizer include succinic acid, maleic acid, fumaric acid, glutamic acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, and the like. Examples of the diol include 1, 2-propanediol, 1, 2-butanediol, 1, 3-butanediol, 2-methyl-1, 3-propanediol, neopentyl glycol, 3-methyl-1, 5-pentanediol, 2-diethyl-1, 3-propanediol, 2, 4-trimethyl-1, 3-pentanediol, 2-ethyl-1, 3-hexanediol, 2-butyl-2-ethyl-1, 3-propanediol, 2-methyl-1, 8-octanediol, and 1, 12-octadecyldiol.

Among them, adipic acid-based polyester plasticizers can be suitably used. This is because it has the effect of excellent plasticizing efficiency and a small amount of smoke generated during combustion.

The preferable addition amount of these plasticizers is 15 to 75 parts by weight, more preferably 25 to 65 parts by weight, of the base material layer 2 relative to 100 parts by weight of the polyvinyl chloride resin, and 10 to 60 parts by weight, more preferably 20 to 50 parts by weight, of the surface layer 3 relative to 100 parts by weight of the polyvinyl chloride resin.

The polyvinyl chloride resin composition of the base layer 2 may contain an inorganic filler and a flame retardant in addition to the plasticizer.

Examples of the filler used in the polyvinyl chloride resin composition of the base layer 2 include carbonates such as calcium carbonate and magnesium carbonate, layered silicates such as clay, talc and mica, hollow spheres such as fly ash spheres, white sand spheres and glass spheres, and the like. By adding the filler, the dimensional stability and heat resistance are further improved, the amount of smoke generated during combustion and the amount of toxic gases such as HCl are reduced, and the cost is reduced. In particular, since the effect of reducing the amount of toxic gas and reducing the cost at the time of combustion is high, calcium carbonate is preferably added.

The amount of these fillers is preferably 5 to 100 parts by weight, more preferably 25 to 80 parts by weight, based on 100 parts by weight of the polyvinyl chloride resin.

Examples of the flame retardant used for the polyvinyl chloride resin composition of the base layer 2 include nitrogen-based materials such as molybdic acid-based compounds, zinc stannate compounds, amine carbonate and boron nitride, metal hydroxides such as magnesium hydroxide and aluminum hydroxide, antimony-based materials such as antimony oxide, halogen-based materials such as bromine-based materials, and phosphorus-based materials such as phosphate esters. By using the flame retardant, the flame retardancy is improved and the amount of smoke generated during combustion and the amount of toxic gases such as HCl are reduced. Particularly, molybdic acid-based compounds and zinc stannate compounds are preferably used because of their high effect of reducing the amount of smoke generated during combustion.

The amount of these flame retardants to be added is 5 to 100 parts by weight, preferably 25 to 80 parts by weight, based on 100 parts by weight of the polyvinyl chloride resin.

The thickness of the base material layer 2 is preferably 0.5mm to 1.1mm, and more preferably 0.6mm to 1.0 mm. The weight of the base material layer 2 is preferably 700g/m²～1550g/m²More preferably 800g/m²～1450g/m²。

The surface layer 3 is disposed on the uppermost surface of the floor finishing material, and the upper surface (the surface on the side opposite to the base material layer 2 side) of the surface layer 3 is exposed on the floor surface after construction. Therefore, it is desired to impart design properties by coloring or providing unevenness on the surface by embossing or the like by adding various pigments to the polyvinyl chloride resin composition of the surface layer 3.

Further, by providing transparency to the surface layer 3 and printing a pattern, decoration, or the like on the lower surface of the surface layer 3 (the surface on the substrate layer 2 side) and the upper surface of the substrate layer 2 (the surface on the surface layer 3 side), a floor finishing material having excellent design properties and capable of protecting the appearance from abrasion of the surface layer 3 due to application to the floor surface can be formed.

In addition, in the case where the layer (in this case, the base material layer 2) on which the design is printed and the resin of the surface layer 3 are different from each other, if adhesion between the material used for printing and both resins is not good, the peel strength is lowered, and therefore, it is necessary to use a primer or the material used for printing is limited, but if the resins used for both layers are the same, the choice of the material that can be used for printing is greatly increased.

The surface layer 3 preferably has a thickness of 0.1mm to 0.3 mm. The weight of the surface layer 3 is preferably 100g/m²～350g/m²。

To the polyvinyl chloride resin composition of the base layer 2 and the surface layer 3, a stabilizer, a lubricant, an ultraviolet absorber, a pigment, a light stabilizer, an antioxidant, an antibacterial agent, a foaming agent, a filler, and the like may be added as necessary.

The thickness of the floor finishing material is preferably 0.8mm to 1.8mm, more preferably 1.0mm to 1.8 mm. The weight of the floor finishing material is preferably 1000g/m²～2300g/m²More preferably 1250g/m²～2300g/m²。

The floor finishing material preferably has a flexural rigidity measured according to JIS K7106 of 50MPa or more, more preferably 100MPa or more. By setting the pressure to 50MPa or more, sufficient bending rigidity can be obtained, and in the floor finishing material for an aircraft, deformation that may occur during flight, formation of air bubbles mixed in the finishing material, and the like are easily suppressed. Further, if the bending rigidity is 500MPa or less, the long floor finishing material can be wound around a paper tube or the like when formed into a long shape, and stored and transported in a roll form, and handling during construction is also easy, and therefore, it is preferably 400MPa or less.

Further, since it is difficult to refuge vehicles and airplanes during operation when a fire or the like occurs, flame retardancy, and suppression of the amount of smoke and toxic gas generated during combustion are desired. The same applies to the floor finishing material, and as specific properties, it is preferable that: the smoke amount and the concentration of a toxic gas (hydrogen chloride gas) in the flame combustion and the flameless combustion were in the following ranges based on the test method specified in ASTM E662.

The smoke generation (ds (max)) is preferably 200 or less, more preferably 150 or less. The toxic gas (hydrogen chloride gas) concentration (HCl (ppm)) is preferably 150ppm or less, more preferably 100ppm or less.

In addition, the adhesive layer 4 and the second reinforcing layer 5 may be provided in addition to the reinforcing layer 1, the base layer 2, and the surface layer 3. For example, the surface layer 3, the base material layer 2, the second reinforcing layer 5, the base material layer 2', the adhesive layer 4, and the reinforcing layer 1 may be structured as in the floor finishing material a (floor finishing material a2) of fig. 2. Fig. 2 shows another embodiment of the floor finishing material of the present invention.

The adhesive layer 4 has an effect of increasing the bonding strength of the reinforcing layer 1 and the base material layer 2. As a method of bonding the reinforcing layer 1 and the base material layer 2, there is a method of laminating the respective layers and then heating; a method of heating each layer and then performing embossing while laminating (laminate embossing); in the case where the synthetic resin for the reinforcing layer 1 is incompatible with the polyvinyl chloride resin for the base layer 2, such as a method of laminating the reinforcing layer 1 on a production line as the base layer 2 in a molten state, when the synthetic resin for the reinforcing layer 1 is incompatible with the polyvinyl chloride resin for the base layer 2, the adhesive layer 4 having compatibility with each layer is provided between the reinforcing layer 1 and the base layer 2, thereby preventing the peeling between the reinforcing layer 1 and the base layer 2.

The adhesive layer 4 is preferably a polymer selected from the group consisting of copolyamides, vinyl chloride-based copolymers, thermoplastic polyurethanes, ethylene vinyl acetate, copolyesters, and mixtures thereof. For example, when the synthetic resin used for the reinforcing layer 1 is a phenol resin, the adhesive layer 4 made of a vinyl chloride copolymer can be preferably used.

The coating amount of the adhesive layer 4 is not particularly limited, but is preferably 3g/m²～250g/m²。

By further providing the second reinforcing layer 5, the bending rigidity and the dimensional stability can be improved. The second reinforcing layer 5 is a woven fabric or a nonwoven fabric, and is a natural fiber or a synthetic fiber, which is an inorganic substance or an organic substance. Preferably, the fiber is selected from glass, carbon, aramid, nylon, polyester, acrylic, vinylon, linen, cotton, hemp, and the like. Among them, glass, carbon, and the like are more preferable.

The thickness of the second reinforcing layer 5 is not particularly limited, and is preferably 0.03mm to 0.5 mm.

In addition, for example, when woven fabric is used as the second reinforcing layer 5, as shown in fig. 2, in the floor finishing material formed by laminating the second reinforcing layer 5 on the base material layer 2 ', the second reinforcing layer 5 is formed in a shape to be inserted into the base material layer 2'.

In the floor finishing material, each of the base material layer 2 and the surface layer 3 can be obtained by mixing predetermined materials and molding them by a molding machine such as an extruder or a roll mill. The floor finishing material can be obtained by laminating these layers on the reinforcing layer 1, laminating the layers together with the adhesive layer 4 provided on the reinforcing layer 1 if necessary, and performing heat treatment. Further, the laminate may be obtained by laminating layers formed by molding the respective layers at once using a multi-layer extruder.

The adhesive layer 4 can be formed by applying the reinforcing layer 1 by dipping, bar coating, gravure coating, reverse coating, die coating, or the like, and heat-treating the resultant with a drying furnace or the like.

Further, the floor finishing material may be obtained by subjecting the laminate to a step of heating and then pressing for printing the appearance, applying a pressure to the surface layer, and laminating the layers.

The second reinforcing layer 5 may be disposed between the base material layers 2 and 2 'as shown in fig. 2, or may be disposed between the base material layer 2 and the surface layer 3, but is preferably disposed between the base material layers 2 and 2' in which the surface roughness of the second reinforcing layer 5 does not easily affect the surface of the surface layer 3 (the surface on the side opposite to the base material layer 2). When the second reinforcing layer 5 is provided, the floor finishing material can be obtained by disposing the second reinforcing layer 5 at a desired position such as between the base material layers 2, 2' and performing heat treatment or the like. Further, the layers may be laminated by molding them at a time using a multi-layer extruder. Thereafter, the floor finishing material may be obtained through a process of heating and then pressurizing.

The adhesive layer 4 may be provided in order to improve the adhesion between the reinforcing layer 1 and the base layer 2, or an adhesive layer may be provided between the second reinforcing layer 5 and another layer as necessary, but if the adhesion between the second reinforcing layer 5 and another layer is sufficient, it is easier to manufacture a product not using these.

Examples

The present invention will be described in detail below with reference to examples. The present invention is not limited to the following examples.

The materials used in the examples and comparative examples are as follows.

Polyvinyl chloride resin: degree of polymerization of polyvinyl chloride 1000

Phthalate-based plasticizer: DOP (dioctyl phthalate)

Polyester plasticizer: the viscosity (25 ℃) of the adipic acid polyester plasticizer was 150 mPas

Phosphate-based plasticizer: TCP (tricresyl phosphate)

A stabilizer: barium-zinc stabilizer

Filling agent: light calcium carbonate

Flame retardant: mixture of Zinc hydroxystannate and molybdic acid-based Compound (mixing ratio: 3: 2 (weight ratio))

Lining material: polyester woven fabric

Adhesive: vinyl chloride copolymer (vinyl chloride-vinyl acetate copolymer) emulsion

The reinforced layers of examples 1,2 and 6 and comparative examples 1 to 5 are as follows.

Enhancement layer: the thickness of the phenolic resin impregnated glass woven fabric (plain weave) is 0.3mm

Using yarn tex 135(g/1000m)

Weaving density of 19 warp yarns/25 mm. 21 weft yarns/25 mm

The impregnation amount of the resin was 40g/m²

The second enhancement layer of example 6 is as follows.

A second enhancement layer: the thickness of the glass woven fabric (twill) is 0.1mm

The yarn tex warp 34(g/1000m) weft 69(g/1000m) is used

Weaving density warp 10X 2/25 mm weft 10/25 mm

Examples 1 and 6 and comparative examples 1 to 3

< method for producing tablet >

The compositions of the surface layer and the base layer were kneaded based on the formulation shown in table 1, and the obtained compound was formed into a sheet of each layer using 2 rolls at 175 ℃. Further, an adhesive layer was formed by coating an adhesive on one surface of the reinforcing layer used in the examples with a bar coating and then drying the coating by heating at 140 ℃ for 30 seconds. The obtained layers were laminated and press-worked at 170 ℃ to obtain floor finishing materials shown in table 1. Here, having a liner means that the liner/base material layer/surface layer are laminated in this order from below. Having a reinforcing layer means laminating in the order of reinforcing layer/adhesive layer/base material layer/surface layer from below. Having the second reinforcing layer means that the reinforcing layer/adhesive layer/base material layer (lower)/second reinforcing layer/base material layer (upper)/surface layer are laminated in this order from below.

< determination of weight >

The weight of this specification uses the electronic dayThe weight of a sample at 10cm square was measured by a flat scale, and the value obtained was converted to 1m²Weight of (g/m)²)。

< measurement of flexural rigidity (flexural rigidity) >

The flexural rigidity in the present specification is measured by a test method defined in JIS K7106. Specifically, when one end of the floor finishing material is fixed to the chuck and bent to a predetermined bending angle, the bending rigidity is determined from the bending moment applied to the other end and the bending angle thereof.

[ Table 1]

The base material layer of the corresponding embodiment 6 is composed of an upper layer and a lower layer, and the lower layer is a bag

Thick sneeze with second reinforcement layer (lamination during sheet making)

As is clear from table 1, examples 1 and 6 have a large bending rigidity value and sufficient rigidity, although the floor finishing material has a small thickness, as compared with comparative examples 1 to 3 having no reinforcing layer. As in comparative examples 1 and 2, if the thickness of the floor finishing material is thick, the weight is large, which is not preferable. In comparative example 2, in which a polyester woven fabric was used as the inner liner material instead of the reinforcing layer, no significant improvement in the bending rigidity value was observed. Further, it was confirmed that there was a significant difference in the value of the flexural rigidity depending on the presence or absence of the reinforcing layer (the phenolic resin-impregnated glass woven fabric in the present example).

Example 2, comparative examples 4 and 5

< method for producing sheet >

Based on the formulation shown in table 2, the compositions of the surface layer and the base material layer were kneaded, respectively, and the compounds were formed into sheets of each layer using 2 rolls at 175 ℃. Further, an adhesive layer was formed by coating an adhesive on one surface of the reinforcing layer used in the examples with a bar coating and then drying the coating by heating at 140 ℃ for 30 seconds. The obtained layers were laminated and press-worked at 170 ℃ to obtain floor finishing materials shown in table 2. Here, having the reinforcing layer means that the reinforcing layer/the adhesive layer/the base material layer/the surface layer are laminated in this order from below.

< measurement of Smoke amount >

The smoke amount in the present specification is measured based on the test method specified by ASTM E662 for the smoke amount in both the flaming combustion and the flameless combustion. Specifically, the sample was placed in a closed chamber and burned for 4 minutes by an electric heater and a gas burner (flame combustion only). During combustion, a dimming coefficient is obtained from the intensity of transmitted light by the photoelectric cell, a specific optical density at the time of the maximum dimming coefficient is calculated, and the smoke generation amount (ds (max)) is obtained based on the calculated value.

< measurement of amount of Hydrogen chloride gas >

The amount of hydrogen chloride gas in the present specification is based on the test method specified by ASTM E662, and the amount of smoke generated by flaming combustion and flameless combustion is measured. Specifically, a sample was placed in a closed chamber, and the sample was burned for 4 minutes by an electric heater and a gas burner (flame combustion only). At the end of the test, the air in the chamber was aerated into a probe tube for 100cc, and the concentration of toxic gas (hydrogen chloride gas) (hcl (ppm)) was measured.

[ Table 2]

As is clear from table 2, the use of the polyester-based plasticizer, the phosphate-based plasticizer, and the flame retardant significantly reduced the amount of smoke and the amount of hydrogen chloride gas, and it was confirmed that the use of the reinforcing layer hardly affected the amount of smoke and the amount of hydrogen chloride gas.

Examples 3 to 5

< method for producing tablet >

Sheets were produced in the same manner as in example 2, except that the following reinforcing layers (1) to (3) having different knitting densities were used as the reinforcing layers.

Enhancement layers (1) to (3): the thickness of the glass woven fabric (plain weave) impregnated with the phenolic resin is 0.3mm

Using yarns tex 135(g/1000m) · (1) - (3) in common

Weaving Density (1) 19 warp yarns/25 mm weft yarns 18 yarns/25 mm

(2) Warp 19/25 mm, weft 21/25 mm

(3) Warp 25/25 mm, weft 25/25 mm

The impregnation amount of the resin was 40g/m²… (1) - (3) share

Measurement of peel Strength in Peel test < 90 >

The reinforcing layer was peeled from the base layer from the end of a sheet sample having a width of 25mm and a length of 200mm, to prepare a nip portion of the reinforcing layer having a length of 50 mm.

The obtained sheet sample was fixed to a 90-degree peel test jig of a Shopper type tensile tester (type: TS-1563, manufactured by Shanghai Co., Ltd.) in a standard state (23. + -. 2 ℃ C., relative humidity 50. + -. 10%), and the holding portion of the reinforcing layer was held by a chuck, and pulled at a load capacity of 100N and a tensile speed of 200 mm/min to measure the peel strength.

< measurement of flexibility >

The flexibility in the present specification is measured by a flexibility test method defined in JIS a 1454. Specifically, it was confirmed that cracking of the reinforcing layer and peeling from the base layer occurred when the reinforcing layer face of the floor covering material was set inside in the standard state (23 ± 2 ℃, relative humidity 50 ± 10%) and the mandrel with a diameter of Φ 100mm, 90mm, 80mm, 70mm, 60mm, 50mm, 40mm, or 30mm was wound and bent. The numerical values in Table 3 indicate the minimum diameter at which no cracking or peeling occurred.

[ Table 3]

In the 90 ° peel test, in example 3, the reinforcing layer was broken before the reinforcing layer and the base layer were peeled off, but the strength between the layers was still sufficient. Examples 4 and 5 did not break the reinforcing layer, and the reinforcing layer was peeled from the base material layer, and the peel strength between the reinforcing layer and the base material layer was sufficient to have a strength of the reinforcing layer and a strength between layers of 60N/25mm and 45N/25 mm. In addition, in the measurement of flexibility, example 5 produced the fracture of the reinforcing layer when wound on a mandrel of Φ (diameter) 60 mm. In examples 3 and 4, even when the mandrel having a diameter of 30mm was used, the reinforcing layer was not cracked or peeled, and the flexibility was excellent. In this way, it was confirmed that there was a difference in the strength and flexibility of the floor finish material depending on the degree of the knitting density (mesh) of the reinforcing layer.

Industrial applicability of the invention

According to the present invention, a floor finishing material which is rigid against impact and deformation, is lightweight, and can be easily manufactured can be provided.

It will be apparent to those skilled in the art that the present invention has been described in detail with reference to specific embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention.

The present application was made on the basis of the japanese patent application filed on 3/15/2019 (japanese patent application 2019-.

Description of the symbols

A floor decorative material

1 enhancement layer

2, 2' substrate layer

3 surface layer

4 adhesive layer

5 second enhancement layer