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High-adhesive protective film and method of preparing same

A protective film, high-viscosity technology, applied in the direction of adhesives, film/sheet-like adhesives, etc., can solve the problems of difficult peeling, easy adhesion between the surface layer and the adhesive layer, and achieve good anti-sticking and unwinding effects.

Active Publication Date: 2019-04-02
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the surface layer and the adhesive layer are easily adhered and difficult to peel off during the unwinding process of the high-viscosity protective film, the invention provides a high-viscosity protective film and a preparation method thereof

Method used

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  • High-adhesive protective film and method of preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The high-viscosity protective film provided by the invention sequentially comprises a surface layer, a core layer and an adhesive layer.

[0039] The surface layer is compounded by polypropylene resin composition and low-density polyethylene at a ratio of 90.1%:9.9%. The polypropylene resin composition is 90% by weight of ethylene-propylene block copolymer, 2% by weight of fluorine-containing compound and 8% by weight of release resin, which are granulated through an extruder. The total weight of the ethylene-propylene block copolymer, the fluorine-containing compound and the release resin is 100%, and the low-density polyethylene accounts for 11% of the total weight of the ethylene-propylene block copolymer, the fluorine-containing compound and the release resin. The density of ethylene-propylene block copolymer is 0.90g / cm 3 , The melt index is 4.0g / 10min. Fluorochemicals are perfluoroalkyl acrylates. The release resin is a vinyl polymer chemically modified by styr...

Embodiment 2

[0044] As the high-viscosity protective film provided in embodiment 1, the difference is:

[0045]The surface layer is compounded by polypropylene resin composition and low-density polyethylene at a ratio of 83.3%:16.7%. The polypropylene resin composition is 90% by weight of ethylene-propylene block copolymer, 7% by weight of fluorine-containing compound and 3% by weight of release resin. The total weight of the ethylene-propylene block copolymer, the fluorine-containing compound and the release resin is 100%, and the low-density polyethylene accounts for 20% of the total weight of the ethylene-propylene block copolymer, the fluorine-containing compound and the release resin.

Embodiment 3

[0047] As the high-viscosity protective film provided in embodiment 1, the difference is:

[0048] The surface layer is composed of polypropylene resin composition and low-density polyethylene at a ratio of 80%:20%. The polypropylene resin composition is 90% by weight of ethylene-propylene block copolymer, 5% by weight of fluorine-containing compound and 5% by weight of release resin. The total weight of the ethylene-propylene block copolymer, the fluorine-containing compound and the release resin is 100%, and the low-density polyethylene accounts for 25% of the total weight of the ethylene-propylene block copolymer, the fluorine-containing compound and the release resin.

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Abstract

The invention relates to the field of protective film materials and especially relates to a high-adhesive protective film and a method of preparing same. For solving the problem that a high-adhesive protective film is difficult to strip off since a surface layer and an adhesive layer are liable to be adhered to each other during an unreeling process. The high-adhesive protective film includes, successively, a surface layer, a core layer and an adhesive layer; the surface layer includes a polypropylene resin component and polyethylene resin. The protective film is low in unreeling force; that is, the required force for unreeling the protective film is low. Influence on adhesion force is avoided since the surface layer is free of polluting the adhesive layer.

Description

technical field [0001] The invention relates to the field of protective film materials, in particular to a high-viscosity protective film and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the electronics industry, the demand for ultra-thin displays such as liquid crystal displays has also increased. The liquid crystal display is mainly composed of a variety of optical films. To prevent optical films from being stained or scratched during handling and assembly, their surfaces need to be protected. Since the protective film is a film composed of three layers of surface layer, core layer and adhesive layer, it is usually rolled into a roll shape, especially for high-viscosity protective films. The layers are easy to stick and not easy to peel off. At the same time, the low-molecular substances on the surface will be brought to the adhesive layer, resulting in a significant decrease in the adhesion of the adhesive la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/30C08L53/00C08L23/06C08L63/10
CPCC08L53/00C08L2205/03C09J2453/00C09J2453/006C09J7/29C09J7/30C09J2301/16C09J2301/41C08L23/06C08L63/10
Inventor 张彦陈强胡金福李刚唐海江
Owner NINGBO EXCITON TECH
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