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High-temperature-resistant protective film and preparation method thereof

A high-temperature-resistant protective film and high crystallization technology, applied in the direction of film/flaky adhesives, adhesives, etc., can solve the problems of warping, warping, white fog, edge melting, and edge melting of the protective film, and achieve Excellent crystallinity and improved heat resistance

Pending Publication Date: 2022-05-17
XIANGSHAN JIZHI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of warping, white fog and even edge melting in the existing protective film during the high temperature process, the present invention provides a high temperature resistant protective film and its preparation method
[0005] Furthermore, in order to solve the phenomenon of warping, white fog, and edge melting in the existing protective film in a high-temperature process environment, the present invention provides a high-temperature-resistant protective film. The protective film has good high-temperature resistance and can withstand high-temperature processes There will be no warping, white fog and edge melting in the environment, and there will be no residual glue after high-temperature baking and tearing. It is suitable for various processes that require high-temperature resistance.

Method used

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  • High-temperature-resistant protective film and preparation method thereof
  • High-temperature-resistant protective film and preparation method thereof
  • High-temperature-resistant protective film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The high temperature resistant protective film provided by the invention comprises a surface layer, a core layer and an adhesive layer in sequence.

[0042] The skin layer consisted of 80% homopolypropylene and 20% methylpentene polymer. The density of homopolypropylene is 0.90g / cm 3 , The melt index is 8.0g / 10min. The density of methylpentene polymer is 0.85g / cm 3 , The melt index is 21.0g / 10min.

[0043] The core layer adopts homopolypropylene with a weight percentage of 100%, and its density is 0.91g / cm 3 , The melt index is 4.5g / 10min.

[0044] The adhesive layer is made of 100% polypropylene and methylpentene polymer with a density of 0.83g / cm 3 , The melt index is 6.0g / 10min.

[0045] The thickness of the surface layer was 6 μm, the thickness of the core layer was 20 μm, and the thickness of the adhesive layer was 4 μm.

Embodiment 2

[0047] As the high temperature resistant protective film that embodiment 1 provides, the difference is:

[0048] The skin layer consisted of 85% homopolypropylene and 15% methylpentene polymer.

[0049] The adhesive layer adopts 5% polypropylene elastomer and 95% polypropylene and methylpentene polymer, and the density of polypropylene elastomer is 0.86g / cm 3 , The melt index is 6.0g / 10min.

Embodiment 3

[0051] As the high temperature resistant protective film that embodiment 1 provides, the difference is:

[0052] The skin layer consisted of 90% homopolypropylene and 10% methylpentene polymer.

[0053] The adhesive layer adopts 10% polypropylene elastomer and 90% polypropylene and methylpentene polymer, and the density of polypropylene elastomer is 0.88g / cm 3 , The melt index is 8.0g / 10min.

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Abstract

The invention relates to the field of protective film materials, in particular to a high-temperature-resistant protective film and a preparation method thereof. In order to solve the problems of warping, rime fog and edge melting of the protective film in a high-temperature process environment, and the problems of adhesive residue and difficulty in stripping after tearing, the invention provides the high-temperature-resistant protective film and the preparation method thereof. The protective film sequentially comprises a surface layer, a core layer and an adhesive layer, wherein the surface layer is composed of homo-polypropylene and high-crystallization resin, the core layer is polypropylene resin, and the adhesive layer is a polypropylene mixture. The protective film not only has high-temperature resistance, but also does not have the problems of warping, edge melting and the like after being torn by high-temperature baking, and is suitable for various high-temperature-resistant protection processes.

Description

technical field [0001] The invention relates to the field of protective film materials, in particular to a high temperature resistant protective film and a preparation method thereof. Background technique [0002] In recent years, with the continuous improvement of the market demand for protective film, the requirements for the function of the protective film are also getting higher and higher, especially in the process of ITO, TP and other electronic components need to have high temperature protection, which requires the protective film to have better The high temperature resistance characteristics can better protect the product surface. [0003] At present, the common high-temperature-resistant protective film on the market is an adhesive film, and the general self-adhesive film does not have high-temperature resistance. After being baked at a high temperature of 150°C, the protective film will have many problems such as warping, white fog and even edge melting. Seriously...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/24C09J7/30C09J123/12C09J123/20
CPCC09J7/29C09J7/30C09J123/12C09J123/20C09J2423/006C09J2423/106C08L23/20C08L23/12
Inventor 张彦陈强田佳乐胡金福李刚唐海江
Owner XIANGSHAN JIZHI NEW MATERIAL CO LTD
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