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Protective film for the back of a light-enhancing film and its preparation method

A protective film and a selected technology, applied in the field of protective film for the back of the brightening film and its preparation, can solve the problem of difficult peeling of the protective film, and achieve the stability of adhesion and surface adhesion, good initial adhesion, and easy separation. Effect

Active Publication Date: 2022-06-07
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing protective film is difficult to peel off, the invention provides a protective film for the back of the brightness enhancement film and its preparation method

Method used

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  • Protective film for the back of a light-enhancing film and its preparation method
  • Protective film for the back of a light-enhancing film and its preparation method
  • Protective film for the back of a light-enhancing film and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The protective film provided by the present invention sequentially includes a surface layer, a core layer and an adhesive layer. The surface layer is composed of ethylene-propylene block copolymer and low-density polyethylene in a weight ratio of 85:15 (ie, the surface layer includes 85% of ethylene-propylene block copolymer and 15% of low-density polyethylene). The density of the ethylene-propylene block copolymer is 0.90 g / cm 3 , the melt index is 9.0g / 10min. The density of low density polyethylene is 0.92g / cm 3 , the melt index is 4.0g / 10min.

[0038] The core layer is an ethylene-propylene block copolymer with a density of 0.90g / cm 3 , the melt index is 9.0g / 10min.

[0039] The adhesive layer is made of hydrogenated styrene-butadiene block copolymer, ethylene-octene copolymer and stress absorbing polymer in a weight ratio of 15:80:5 (that is, the adhesive layer includes hydrogenated styrene-butylene) Diene block copolymer 15%, ethylene-octene copolymer 80%, and...

Embodiment 2

[0042]As the protective film provided in Example 1, the difference is:

[0043] The surface layer is made of ethylene-propylene block copolymer and low-density polyethylene in a weight ratio of 80:20.

[0044] The adhesive layer is made of hydrogenated styrene-butadiene block copolymer, ethylene-octene copolymer and propylene and tetramethylpentene copolymer in a weight ratio of 18:84:8. where the density of the hydrogenated styrene-butadiene block is 0.90 g / cm 3 . The density of ethylene-octene copolymer is 0.88g / cm 3 , the melt index is 5.0g / 10min.

Embodiment 3

[0046] As the protective film provided in Example 1, the difference is:

[0047] The surface layer is made of ethylene-propylene block copolymer and low-density polyethylene in a weight ratio of 75:25. The density of the ethylene-propylene block copolymer is 0.91 g / cm 3 , the melt index is 4.0g / 10min. The density of low density polyethylene is 0.93g / cm 3 , the melt index is 6.0g / 10min.

[0048] The adhesive layer is made of hydrogenated styrene-butadiene block copolymer, ethylene-octene copolymer and propylene and tetramethylpentene copolymer in a weight ratio of 22:68:10. The content of styrene in the hydrogenated styrene-butadiene block copolymer is 10%, and the density is 0.94g / cm 3 . The density of ethylene-octene copolymer is 0.90g / cm 3 , the melt index is 9.0g / 10min.

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Abstract

The invention relates to the field of protective film materials, in particular to a light-enhancing back protective film and a preparation method thereof. In order to solve the problem that the existing brightness-increasing back protection film is difficult to peel off, the invention provides a brightness-enhancing back protection film and a preparation method thereof. The protective film includes a skin layer, a core layer and an adhesive layer, the skin layer includes polypropylene resin, the core layer is selected from polypropylene resin, and the adhesive layer includes styrene-based thermoplastic elastomer, polyolefin resin and stress-absorbing polymer thing. The brightness-enhancing back protective film provided by the invention has good initial adhesion, the end of the protective film and the back is easy to peel off, the peeling force of the protective film is moderate, and the viscosity changes little with time and pressure, and is suitable for use as a brightness-enhancing back protective film.

Description

technical field [0001] The invention relates to the field of protective film materials, in particular to a protective film for the back surface of a brightening film and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the electronic industry, the demand for ultra-thin displays such as liquid crystal displays is also increasing. The liquid crystal display is mainly composed of a combination of various optical films. In order to prevent the optical film from being stained or scratched during handling and assembly, its surface needs to be protected. As a protective film for the back of the enhancement film, the protective film is required to have good initial adhesion, and after the protective film is attached to the back of the enhancement film and rolled up and tightened, it is stored under specific temperature and pressure conditions, and there will be no difficult peeling, Peel force serious climb and other proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/29C09J7/30C09J123/08C09J153/02C08L53/00C08L23/06
CPCC09J7/29C09J7/30C09J123/0815C09J153/025C09J2203/318C09J2453/006C09J2423/046C08L53/025C08L23/14C08L23/0815
Inventor 唐海江陈强胡金福袁思锐夏寅郭俊超李刚张彦
Owner NINGBO EXCITON TECH
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