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High-barrier biaxially oriented polyamide color changing film and preparation method thereof

A technology of biaxial stretching and polyamide, applied in the field of high-barrier biaxial stretching polyamide color-changing film and its preparation, to achieve excellent mechanical properties and scratch resistance, solve uneven dispersion, and excellent hydrolysis resistance

Active Publication Date: 2021-03-26
厦门长塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a high-barrier biaxially stretched polyamide color-changing film and its preparation method, and solve the problem of both color change and performance of the polyamide film in the above-mentioned background technology

Method used

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  • High-barrier biaxially oriented polyamide color changing film and preparation method thereof
  • High-barrier biaxially oriented polyamide color changing film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this embodiment, a high-barrier biaxially stretched polyamide color-changing film is composed of a PU color film layer, an adhesive layer and a substrate layer; the thickness of the PU color film layer is 2.5 microns, and the thickness of the adhesive layer is 0.5 microns, and the thickness of the substrate layer is 15 microns.

[0055] The PU color film layer consists of 50% water-based polyurethane dispersion, 15% water, 5% alcohol, 2% film-forming aid, 1% leveling agent, 3% pH stabilizer, 20% pigment, 1% anti-scratch agent, 3% curing agent;

[0056] The bonding layer is composed of 50% water-based polyurethane dispersion, 40% water, 8% alcohol, and 2% curing agent;

[0057] The substrate layer is composed of an upper surface layer, a core layer and a lower surface layer, wherein the upper and lower surface layers are composed of 85% PA6, 13.5% PA12, 0.5% anti-blocking agent and 1.0% slip agent, and the core layer is composed of 100% The composition of EVOH.

[...

Embodiment 2

[0061] The difference between embodiment 2 and embodiment 1 is:

[0062] The PU color film layer consists of 30% aqueous polyurethane dispersion, 20% water, 8% alcohol, 3% film-forming aid, 2% leveling agent, 4.5% pH stabilizer, 25% Pigment, 2% anti-scratch agent, 5.5% curing agent;

[0063] The bonding layer is composed of 40% water-based polyurethane dispersion, 45% water, 12% alcohol, and 3% curing agent;

[0064] The substrate layer is composed of an upper surface layer, a core layer and a lower surface layer, wherein the upper and lower surface layers are composed of 70% PA6, 27% PA12, 1.0% anti-blocking agent and 2.0% slip agent, and the core layer is composed of 100% EVOH composition.

Embodiment 3

[0066] The difference between embodiment 3 and embodiment 1 is:

[0067] The PU color film layer consists of 40% aqueous polyurethane dispersion, 18% water, 6.5% alcohol, 2.5% film-forming aid, 1.5% leveling agent, 4.0% pH stabilizer, 22% Pigment, 1.5% anti-scratch agent, 4% curing agent;

[0068] The bonding layer is composed of 45% water-based polyurethane dispersion, 42.5% water, 10% alcohol, and 2.5% curing agent;

[0069] The substrate layer is composed of an upper surface layer, a core layer and a lower surface layer, wherein the upper and lower surface layers are composed of 80% PA6, 17% PA12, 1.0% anti-blocking agent and 2.0% slippery agent, and the core layer is composed of 100% EVOH composition.

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Abstract

The invention discloses a high-barrier biaxially oriented polyamide color changing film and a preparation method thereof. The color changing film is composed of a PU color film layer, a bonding layerand a base material layer. Slurry of the PU color film layer and slurry of the bonding layer both adopt waterborne polyurethane dispersion liquid, and the base material layer is sequentially composedof an upper surface layer, a core layer and a lower surface layer; the upper surface layer and the lower surface layer are made of a mixture of PA6 and PA12, and the core layer is made of EVOH. According to the invention, the PU color film layer coated on a release film is transferred to the surface of the biaxially oriented polyamide film obtained by three-layer co-extrusion casting stretching toobtain the biaxially oriented polyamide color changing film, and the film has the advantages of uniform color, good color coverage rate, high barrier property, scratch resistance, low moisture absorption and the like; and the PU color film layer is widely applied to packaging and decoration.

Description

technical field [0001] The invention belongs to the technical field of nylon packaging and decorative films, and in particular relates to a high-barrier biaxially stretched polyamide color-changing film and a preparation method thereof. Background technique [0002] With the rapid development of the flexible packaging industry and the continuous improvement of people's living standards, while people are pursuing food health and hygiene, they also pay attention to the aesthetic sense, touch sense, and artistic sense that product packaging brings to people. At present, the biaxially oriented polyamide films on the market are mainly transparent, and there are basically few nylons in other colors such as black nylon and white nylon, which makes nylon lack competition in other fields (such as automotive decorative films, etc.) sex. [0003] Although the nylon film for packaging on the market can be printed to enrich the color of the nylon film, if it is a solid-color biaxially o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/34B32B27/08B32B27/36B32B27/20B32B27/30B32B7/12B32B7/06B32B33/00C09D175/04C09J175/04B29D7/01
CPCB32B27/34B32B27/08B32B27/36B32B27/20B32B27/306B32B7/12B32B7/06B32B33/00C09D175/04C09J175/04B29D7/01B32B2255/10B32B2255/26B32B2307/306B32B2307/554B32B2307/558B32B2307/584Y02E60/10
Inventor 李智尧林新土贾露魏婕陈曦郑伟
Owner 厦门长塑实业有限公司
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