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A kind of protective film and preparation method thereof

A technology of protective film and adhesive layer, which is applied in the direction of film/flaky adhesives, adhesives, conductive adhesives, etc. It can solve the problems of antistatic agent precipitation in protective films and easy generation of a large amount of static electricity, so as to speed up static electricity consumption Dissipation speed, maintain physical properties, fast electrostatic dissipation effect

Active Publication Date: 2022-02-22
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 a large amount of static electricity is easily generated between the adhesive layer of the protective film and the surface of the optical film when the existing protective film is torn off from the optical film, the invention provides a protective film and its preparation method
The protective film provided by the present invention realizes that in the process of tearing off the protective film from the optical film by adding an antistatic component in the adhesive layer formula, less static electricity is generated between the adhesive layer of the protective film and the surface of the optical film (abbreviated as tearing static electricity) Small), fast static dissipation, excellent physical properties, and solve the serious problem of antistatic agent precipitation in the existing protective film, the sticky layer of the protective film does not have problems such as antistatic agent precipitation

Method used

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  • A kind of protective film and preparation method thereof
  • A kind of protective film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The protective film provided by the invention sequentially includes a surface layer, a core layer and an adhesive layer. The surface layer is made of ethylene-propylene block copolymer and stearic acid amide in a weight ratio of 99.5:0.5. The density of ethylene-propylene block copolymer is 0.90g / cm 3 , The melt index is 9.0g / 10min.

[0039] The core layer is made of ethylene-propylene block copolymer with a density of 0.90g / cm 3 , The melt index is 9.0g / 10min.

[0040] The adhesive layer is made of hydrogenated styrene-butadiene block copolymer, ethylene-octene copolymer and antistatic agent (a mixture of polyether ester amide and glyceride) in a weight ratio of 60:39:1 . The styrene content in the hydrogenated styrene-butadiene block copolymer is 13%, and the density is 0.90g / cm 3 . The density of ethylene-octene copolymer is 0.86g / cm 3 , The melt index is 5.0g / 10min. The weight ratio of polyether ester amide and glyceride is 1:1.

[0041] The surface layer h...

Embodiment 2

[0043] As the protective film provided in Example 1, the difference is:

[0044] The surface layer is made of ethylene-propylene block copolymer and stearic acid amide in a weight ratio of 98.5:1.5.

[0045] The adhesive layer is made of a mixture of hydrogenated styrene-butadiene block copolymer, ethylene-octene copolymer and antistatic agent (polyether ester amide and glycerol ester) in a weight ratio of 65:33:2 .

Embodiment 3

[0047] As the protective film provided in Example 1, the difference is:

[0048] The surface layer is made of ethylene-propylene block copolymer and stearic acid amide in a weight ratio of 98:2.

[0049] The adhesive layer is made of hydrogenated styrene-butadiene block copolymer, ethylene-octene copolymer and antistatic agent (a mixture of polyether ester amide and glyceride) in a weight ratio of 68:29:3 .

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Abstract

The invention relates to the field of protective film materials, in particular to a protective film and a preparation method thereof. In order to solve the problem that a large amount of static electricity is easily generated between the adhesive layer of the protective film and the surface of the optical film when the existing protective film is torn off from the optical film, the invention provides a protective film and a preparation method thereof. The protective film includes a surface layer, a core layer and an adhesive layer from top to bottom; the surface layer includes 97-99.5% of polypropylene resin, and 0.5-3% of an anti-blocking agent; the core layer includes 100% of polypropylene resin; The adhesive layer includes 60-82% styrene thermoplastic elastomer, 15-39% polyolefin resin, and 1-3% antistatic agent; the antistatic agent is selected from the mixture of polyether ester amide and glyceride; the Said percentages are percentages by weight. The protective film provided by the invention has low static electricity when torn off immediately, has fast static electricity dissipation after tearing off, and has no precipitation problem, and is suitable for optical protective films with low static electricity requirements.

Description

technical field [0001] The invention relates to the field of protective film materials, in particular to a protective film and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the electronics industry, the protection requirements for the protective film used for optical films are also getting higher and higher. At present, the optical protective film produced is mainly made of polypropylene, because polypropylene film has good electrical insulation Once it is triboelectrically charged, it is difficult to eliminate. Therefore, in the process of tearing the protective film from the optical film, a large amount of static electricity is likely to be generated between the adhesive layer of the protective film and the surface of the optical film, resulting in adsorption on the surface of the optical film product. Dust will affect performance, and it will also cause electrostatic damage to production line assemblers. In ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/29C09J7/24C09J7/30C09J153/02C09J123/08C09J9/02
CPCC09J7/29C09J7/30C09J153/025C09J9/02C08L2201/04C08K2201/017C09J2453/006C08K5/20
Inventor 唐海江陈强胡金福李刚张彦
Owner NINGBO EXCITON TECH
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