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A novel high-viscosity protective film and its preparation method

A protective film and high-viscosity technology, which is applied in the direction of adhesives, film/sheet adhesives, etc., can solve the problems of easy adhesion between the surface layer and the adhesive layer, and is not easy to peel off, so that the adhesion force has little influence with temperature and time. Easy to peel, good adhesion effect

Active Publication Date: 2021-10-22
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 surface layer and the adhesive layer are easy to stick and not easy to peel off during the unwinding process of the high-viscosity protective film, the present invention provides a new type of high-viscosity protective film and its preparation method

Method used

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  • A novel high-viscosity protective film and its preparation method
  • A novel high-viscosity protective film and its preparation method
  • A novel high-viscosity protective film and its preparation method

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Embodiment 1

[0029] The novel high-viscosity protective film provided by the invention sequentially comprises a surface layer, a core layer and an adhesive layer.

[0030] The surface layer is made of ethylene-propylene block copolymer and release resin at a ratio of 80%:20%. The density of ethylene-propylene block copolymer is 0.90g / cm 3 , The melt index is 9.0g / 10min. The release resin is a vinyl polymer chemically modified by styrene (produced by Mitsubishi Chemical, the brand is W200P).

[0031] The core layer adopts ethylene-propylene block copolymer with a weight percentage of 100%, and its density is 0.90g / cm 3 , The melt index is 5.0g / 10min.

[0032] The adhesive layer adopts methyl methacrylate-butyl acrylate-methyl methacrylate block copolymer with a density of 1.13g / cm 3 , The melt index is 1.2g / 10min.

[0033] The surface layer had a thickness of 10 μm, the core layer had a thickness of 30 μm, and the adhesive layer had a thickness of 10 μm.

Embodiment 2

[0035] As the novel high-viscosity protective film that embodiment 1 provides, the difference is:

[0036] The surface layer is made of ethylene-propylene block copolymer and high-density polyethylene at a ratio of 80%:20%. The density of ethylene-propylene block copolymer is 0.90g / cm 3 , The melt index is 9.0g / 10min. The density of high-density polyethylene is 0.945g / cm 3 .

Embodiment 3

[0038] As the novel high-viscosity protective film that embodiment 1 provides, the difference is:

[0039] The surface layer is made of ethylene-propylene block copolymer, high-density polyethylene and release resin at a ratio of 80%:10%:10%. The density of ethylene-propylene block copolymer is 0.91g / cm 3 , The melt index is 4.0g / 10min. The density of high-density polyethylene is 0.963g / cm 3 . The release resin is a vinyl polymer chemically modified by styrene (produced by Mitsubishi Chemical, the brand is W200P).

[0040] The adhesive layer adopts methyl methacrylate-butyl acrylate-methyl methacrylate block copolymer. Its density is 1.11g / cm 3 , The melt index is 1.5g / 10min.

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Abstract

The invention relates to the field of protective film materials, in particular to a novel high-viscosity protective film and a preparation method thereof. In order to solve the problem that the surface layer and the adhesive layer are easily adhered to and difficult to peel off during the unwinding process of the high-viscosity protective film, the invention provides a novel high-viscosity protective film and a preparation method thereof. The high-viscosity protective film sequentially includes a surface layer, a core layer and an adhesive layer, wherein the surface layer includes 55-80% of ethylene-propylene block copolymer, 0%-30% of high-density polyethylene, and 0%-30% of release resin. 20%, the total amount of the high-density polyethylene and release resin is 20%-45%. The protective film has high adhesion, good attachment effect, small change in adhesion with temperature and time, easy peeling, no adhesive residue, easy unwinding, and is suitable as a protective film for the surface of optical materials with high adhesion requirements.

Description

technical field [0001] The invention relates to the field of protective film materials, in particular to a novel 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 closely attached, and the tackifying ingredients in the adhesive layer are easy to migrate to the surface layer, causing problems such as difficulty in unwinding and insufficient adhesion of the adhesive l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/29
Inventor 唐海江陈强胡金福夏寅周鼎冯金刚李刚张彦
Owner NINGBO EXCITON TECH
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