阅读说明：本技术 一种耐高温的铝塑复合膜 (High temperature resistant plastic-aluminum complex film ) 是由 张茜 于 2019-08-30 设计创作，主要内容包括：本发明提供一种耐高温的铝塑复合膜,包括：从上往下依次设置的哑光层、尼龙层、第一接着剂层、铝箔层、第二接着剂层和PP层,哑光层中设有多个中空玻璃微珠,各个中空玻璃微珠通过胶黏剂连接。本发明提出的耐高温的铝塑复合膜,在尼龙外层再加一层哑光层,该涂层的填充物是一种中空粒子,其具有耐高温性能同时使尼龙表面有球形凸起,在冲深成型时减少与模具的接触面积,进而减少摩擦提高冲深性能。该产品适用于所有现有的铝塑膜,其操作方法简单易行,不仅提高了电池生产商的效率而且提升了铝塑膜的产品性能。(The invention provides a high-temperature-resistant aluminum-plastic composite film, which comprises: the matte layer, the nylon layer, the first adhesive layer, the aluminum foil layer, the second adhesive layer and the PP layer are arranged from top to bottom in sequence, a plurality of hollow glass beads are arranged in the matte layer, and the hollow glass beads are connected through an adhesive. The high-temperature-resistant aluminum-plastic composite film provided by the invention is characterized in that the matte layer is additionally arranged on the outer layer of the nylon, and the filler of the coating is hollow particles, so that the nylon surface has spherical protrusions while the high-temperature-resistant aluminum-plastic composite film has high-temperature resistance, the contact area with a die is reduced during deep drawing forming, and further, the friction is reduced, and the deep drawing performance is improved. The product is suitable for all the existing aluminum-plastic films, the operation method is simple and easy to implement, the efficiency of a battery manufacturer is improved, and the product performance of the aluminum-plastic film is improved.)

1. The utility model provides a high temperature resistant plastic-aluminum complex film which characterized in that includes: from last matte layer, nylon layer, first adhesive layer, aluminium foil layer, second adhesive layer and the PP layer that down sets gradually, be equipped with a plurality of cavity glass microballons in the matte layer, each cavity glass microballon passes through the gluing agent and connects, cavity glass microballon includes casing portion and air portion, casing portion is confined ball-type, the center of casing portion is hollow structure, and the intussuseption is filled with the air, is air portion.

2. The high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the matte layer is coated on the nylon layer by a gravure roller, the thickness of the matte layer is 3-4um, the adhesive comprises a main agent and a hardener, the main agent is polyester polyol or acrylic acid series, the hardener is HDI or a mixture of IPDI and HDI, and when the hardener is a mixture of IPDI and HDI, the mass ratio of IPDI to HDI is 9: 1.

3. The high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the volume of the shell part of the hollow glass bead accounts for 10% -30% of the volume of the hollow glass bead.

4. the high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the wall thickness of the shell part of the hollow glass bead is 1.2-2.2 microns, and the shell part is made of any one of SiO2, Al2O3 and MgO.

5. The high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the volume of the air part of the hollow glass bead accounts for 85% of the volume of the hollow glass bead.

6. The high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the nylon layer is made of nylon-6, and the thickness of the nylon layer is 20-30 microns.

7. The high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the thickness of the aluminum foil layer is 36-44 μm.

8. The high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the first adhesive layer is made of any one or more of acrylic adhesives, polyurethane adhesives, epoxy adhesives and polyester adhesives, and is 10-15g/m 2.

9. The high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the second adhesive layer is made of any one or more of acrylic adhesives, polyurethane adhesives, epoxy adhesives and polyester adhesives, and is 25-30g/m 2.

10. the high temperature resistant aluminum-plastic composite film according to claim 1, wherein: the thickness of the PP layer is 10-30 mu m.

Technical Field

The invention belongs to the technical field of new materials, and particularly relates to a high-temperature-resistant aluminum-plastic composite film.

background

at present, the aluminum plastic film is not only used for 3C consumer electronics but also widely used for power batteries and the like, and the reason that nylon is used as an outer layer material in the prior art is that nylon mainly protects an aluminum foil layer in a middle layer from being scratched, can be continuously operated in a processing process without damaging the appearance, and can prevent the battery from being subjected to impact shock and the like caused by falling and the like in the use process of the battery to carry out internal protection, but a battery manufacturer can increase the heat sealing temperature and shorten the heat sealing time in order to improve the production efficiency in the use process, and then the nylon surface is easy to be damaged and whitened at high temperature.

Therefore, in order to solve the above problems, it is necessary to develop a high temperature resistant aluminum-plastic composite film.

Disclosure of Invention

The invention aims to solve the technical problem of providing a high-temperature-resistant aluminum-plastic composite film to solve the problem that the nylon surface is damaged and whitened due to high temperature when a lithium battery is subjected to heat sealing.

In order to solve the above technical problems, the present invention provides a high temperature resistant aluminum-plastic composite film, comprising: from last matte layer, nylon layer, first adhesive layer, aluminium foil layer, second adhesive layer and the PP layer that down sets gradually, be equipped with a plurality of cavity glass microballons in the matte layer, each cavity glass microballon passes through the gluing agent and connects, cavity glass microballon includes casing portion and air portion, casing portion is confined ball-type, the center of casing portion is hollow structure, and the intussuseption is filled with the air, is air portion.

As a preferable embodiment of the high temperature resistant aluminum-plastic composite film according to the present invention, the matte layer is coated on the nylon layer by a gravure roll, the thickness of the matte layer is 3 to 4um, the adhesive includes a main agent and a hardener, the main agent is polyester polyol or acrylic, the hardener is HDI or a mixture of IPDI and HDI, and when the hardener is a mixture of IPDI and HDI, the mass ratio of IPDI to HDI is 9: 1.

As a preferable scheme of the high temperature resistant aluminum-plastic composite film, the volume of the shell portion of the hollow glass bead accounts for 10% -30% of the volume of the hollow glass bead.

In a preferred embodiment of the high temperature resistant aluminum-plastic composite film according to the present invention, the wall thickness of the shell portion of the hollow glass beads is 1.2 to 2.2 μm, and the material of the shell portion is any one of SiO2, Al2O3, and MgO.

As a preferable embodiment of the high temperature resistant aluminum-plastic composite film according to the present invention, the volume of the air portion of the hollow glass bead accounts for 85% of the volume of the hollow glass bead.

As a preferred scheme of the high-temperature-resistant aluminum-plastic composite film, the nylon layer is made of nylon-6, and the thickness of the nylon layer is 20-30 microns.

as a preferable scheme of the high-temperature-resistant aluminum-plastic composite film, the thickness of the aluminum foil layer is 36-44 μm.

as a preferable scheme of the high temperature resistant aluminum-plastic composite film, the first adhesive layer is made of any one or more of acrylic, polyurethane, epoxy and polyester adhesives, and is 10-15g/m 2.

As a preferable scheme of the high temperature resistant aluminum-plastic composite film, the material of the second adhesive layer is any one or more of acrylic, polyurethane, epoxy and polyester adhesives, and the second adhesive layer is 25-30g/m 2.

As a preferable scheme of the high-temperature-resistant aluminum-plastic composite film, the thickness of the PP layer is 10-30 mu m.

Compared with the prior art, the high-temperature-resistant aluminum-plastic composite film provided by the invention has the following advantages: the heat-resistant coating is added on the outer layer of the nylon, the filler of the coating is hollow particles, the coating has high temperature resistance, and spherical protrusions are formed on the surface of the nylon, so that the contact area with a die is reduced during deep drawing forming, and further, the friction is reduced, and the deep drawing performance is improved. It has solved the battery producer and has destroyed the problem that blurs in order to improve production efficiency nylon that the heat-seal leads to under the higher temperature. The product is suitable for all the existing aluminum-plastic films, the operation method is simple and easy to implement, the efficiency of a battery manufacturer is improved, and the product performance of the aluminum-plastic film is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein the content of the first and second substances,

FIG. 1 is a schematic longitudinal cross-sectional view of a high temperature resistant aluminum-plastic composite film according to the present invention; wherein: 1 is a matte layer, 2 is a nylon layer, 3 is a first adhesive layer, 4 is an aluminum foil layer, 5 is a second adhesive layer, 6 is a PP layer, and 7 is hollow glass beads.

FIG. 2 is a high temperature resistant schematic diagram of a high temperature resistant aluminum-plastic composite film according to the present invention;

FIG. 3 is an electron microscope image of hollow glass microspheres of the high temperature resistant aluminum-plastic composite film of the present invention;

FIG. 4 is an electron microscope image of the prior art aluminum-plastic composite film and the high temperature resistant aluminum-plastic composite film of the present invention magnified 100 times under the heat sealing conditions of 210 ℃ and 3s at 0.3 MPa;

FIG. 5 is an electron microscope image of the prior art aluminum-plastic composite film and the high temperature resistant aluminum-plastic composite film of the present invention magnified 100 times under the heat sealing conditions of 230 ℃ and 3s at 0.3 MPa.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.

First, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Next, the present invention will be described in detail by using schematic structural diagrams, etc., and for convenience of explanation, the schematic diagrams illustrating the structure of the high temperature resistant aluminum-plastic composite film will not be enlarged partially according to the general scale in describing the embodiments of the present invention, and the schematic diagrams are only examples, which should not limit the scope of the present invention. In addition, the actual fabrication process should include three-dimensional space of length, width and depth.

As shown in fig. 1, the high temperature resistant aluminum-plastic composite film has the following structures from top to bottom: a polyurethane coating filled with hollow glass beads 7, namely a matte layer 1; a nylon layer 2; a first adhesive layer 3; an aluminum foil layer 4; a second adhesive layer 5; a PP layer 6. The polyurethane coating filled with the hollow glass beads 7 is coated on the nylon layer 2 by a gravure roller to form a matte layer 1, and the thickness of the matte layer 1 is 3-4 mu m. The volume fraction of the shell part of the hollow glass bead 7 in the whole is preferably 10-30%, and under the condition that the doping volume percentage of the hollow glass bead 7 is small, the surface of the material is compact, and the hollow glass bead 7 is hardly damaged or aggregated and agglomerated. Preferably, the volume fraction of air in the hollow glass beads 7 is basically kept at about 85%, the wall thickness of the hollow glass beads 7 is preferably 1.2-2.2, and the wall thickness of the hollow glass beads 7 is increased along with the increase of the particle size. The hollow glass beads 7 are inorganic materials, and can be selected from SiO2, Al2O3 and MgO. As shown in fig. 2, the sizes of the hollow glass microspheres 7 may be different from each other. The nylon layer 2 is made of nylon-6, and the thickness is preferably 20-30 μm. The adhesive selected by the first adhesive layer 3 and the second adhesive layer 5 is one or more of acrylic, polyurethane, epoxy, polyester and adhesive. The thickness of the aluminium foil layer 4 is preferably between 36 and 44 μm. The thickness of the PP layer 6 is preferably 10 to 30 μm.

The composition of matte layer 1 was as follows:

First, high temperature resistance test

1. Sample preparation: coating a matte layer 1 on the surface of the finished aluminum-plastic film by using a No. 5 winding bar;

2. Sample size: heat seal length 75mm x Heat seal width 10mm

3. As shown in fig. 2, the high temperature principle: when the heat sealing head is hot-pressed on the outer surface layer of the material, heat is dispersed by the heat conduction through the hollow glass beads, and the temperature reaching the surface of the base material cannot cause damage to the base material.

TABLE 1

The NG ratio is shown in Table 1, and the matte layer has obvious improvement on the high-temperature heat resistance of nylon as can be seen from Table 1; the heat-resisting effect formula M1 more than the formula M2 more than the prior art.

TABLE 2

As can be seen from table 2, the matte layer had no effect on the heat seal strength; the increase of temperature, time and pressure can improve the heat sealing strength.

As shown in fig. 4 and 5, the prior art exhibited poor heat sealing at high temperatures, and neither formulation M1 nor formulation M2 exhibited any abnormalities.