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High-performance double-layer PET film

A high-performance, double-layer technology, applied in coatings, epoxy resin coatings, polyether coatings, etc., can solve the problem that the anti-scratch and wear-resistant layer cannot protect the surface of the film, surface hardness, abrasion resistance and impact resistance. , can not meet the problems of high-end electronic optoelectronic products, etc., to achieve the effect of improving weather resistance and various mechanical properties, increasing light transmittance, and increasing polarity

Inactive Publication Date: 2016-12-07
SUZHOU KECHUANG ELECTRONICS MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PET film is deficient in surface hardness, wear resistance, impact resistance, etc., and cannot meet the needs of high-end electronic optoelectronic products. Therefore, the hard coating suitable for PET materials has been developed rapidly.
[0003] However, in practical applications, since PET is a linear polymer with benzene rings on the main chain and does not contain branches, the π bond of the carbonyl group on the main chain and the π bond delocalized electrons on the adjacent benzene ring form a stable π- The π-conjugated structure has high chemical stability, which makes it difficult for coating molecules to penetrate into the PET film and form a good interface bond with the coating.
In addition, the general optical film requires that the surface of the substrate should be flat and free of defects, and the coating has fewer bonding points on the surface of the PET substrate, which leads to the coating with poor adhesion being easy to fall off when the film is rolled or used, making the PET film The anti-scratch and wear-resistant layer cannot protect the surface of the film

Method used

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  • High-performance double-layer PET film
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Examples

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example 1

[0027] A high-performance double-layer PET film, which includes a PET substrate and a scratch-resistant and wear-resistant layer coated on the PET substrate, wherein the scratch-resistant and wear-resistant layer includes: 39.5wt% epoxy acrylate; Ether Acrylate 2wt%; Trimethylolpropane Triacrylate 30wt%; Neopentyl Glycol Diethoxy Diacrylate 20wt%; BaSO 4 2.5wt%; 2-isopropylxanthone 6wt%;

[0028] Among them, the BaSO 4 First, surface treatment is required: under continuous stirring, the BaSO 4 Gradually add Na to the slurry 2 SiO 3 solution, while controlling the pH of the reaction system to be 8.7, and finally make silicon with Si(OH) 4 form precipitates wrapped in the BaSO 4 the surface of the particle.

[0029] Before the anti-scratch layer is coated on the PET substrate, the PET substrate is ultrasonically treated in an acetone solution with a pH of 10 for 15 minutes, and then placed in absolute ethanol for 20 minutes.

[0030] The BaSO 4 The particle size is 100 ...

example 2

[0032] A high-performance double-layer PET film, which includes a PET substrate and a scratch-resistant and wear-resistant layer coated on the PET substrate, wherein the scratch-resistant and wear-resistant layer includes: 43.5wt% epoxy acrylate; Ether Acrylate 8wt%; Trimethylolpropane Triacrylate 35wt%; Neopentyl Glycol Diethoxy Diacrylate 10wt%; BaSO 4 1.5wt%; Di-tert-butyl peroxide 2wt%;

[0033] Among them, the BaSO 4 First, surface treatment is required: under continuous stirring, the BaSO 4 Gradually add Na to the slurry 2 SiO 3 solution, while controlling the pH of the reaction system to be 9.2, and finally make the silicon with Si(OH) 4 form precipitates wrapped in the BaSO 4 the surface of the particle.

[0034] Before the anti-scratch layer is coated on the PET substrate, the PET substrate is ultrasonically treated in an acetone solution with a pH of 10 for 30 minutes, and then placed in absolute ethanol for 15 minutes.

[0035] The BaSO 4 The particle size ...

example 3

[0037]A high-performance double-layer PET film, which includes a PET substrate and a scratch-resistant and wear-resistant layer coated on the PET substrate, wherein the scratch-resistant and wear-resistant layer includes: 44wt% epoxy acrylate; polyether Acrylates 5wt%; Trimethylolpropane Triacrylate 30wt%; Neopentyl Glycol Diethoxy Diacrylate 15wt%; BaSO 4 2wt%; 4,4-dimethylaminobenzophenone 3wt%; benzophenone 1wt%;

[0038] Among them, the BaSO 4 First, surface treatment is required: under continuous stirring, the BaSO 4 Gradually add Na to the slurry 2 SiO 3 Solution, while controlling the pH of the reaction system to be 9, and finally make the silicon with Si(OH) 4 The form precipitates wrapped in the BaSO 4 the surface of the particle.

[0039] Before the anti-scratch layer is coated on the PET substrate, the PET substrate is ultrasonically treated in an acetone solution with a pH of 10 for 20 minutes, and then placed in absolute ethanol for 17 minutes.

[0040] Th...

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Abstract

The invention provides a high-performance double-layer PET film which comprises a PET base material and an anti-scraping wear-resistant layer coating the PET base material. The anti-scraping wear-resistant layer comprises 30-50 wt% of epoxy acrylate, 2-8 wt% of polyether acrylate, 30-40 wt% of trimethylol propyl triacrylate, 10-20 wt% of neopentyl glycol diacrylate, 1.5-2.5 wt% of BaSO4 and 2-6 wt% of photoinitiator. BaSO4 is first subject to surface treatment through SiO2. By selection of an appropriate diluent, epoxy acrylate serves as a main body prepolymer to be crosslinked with polyether acrylate and filled with inorganic particle barium sulfate, a prepared coating has good performance of adhering to base material PET, the obtained double-layer PET film is excellent in various mechanical properties, and development of the high-performance organic film is promoted.

Description

technical field [0001] The present invention relates to a PET protective film. More specifically, the present invention relates to a high performance bilayer PET film. Background technique [0002] Polyethylene terephthalate (PET) has excellent optical properties, electrical properties and thermal properties, such as high light transmittance, good insulation, excellent heat resistance and dimensional stability when heated. It is widely used in the field of surface protection of optoelectronic products, especially the protection of the surface of plasma displays and thin film liquid crystal displays. However, PET film is deficient in surface hardness, wear resistance, impact resistance, etc., and cannot meet the needs of high-end electronic and optoelectronic products. Therefore, hard coatings suitable for PET materials have been developed rapidly. [0003] However, in practical applications, since PET is a linear polymer with benzene rings on the main chain and does not co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D163/10C09D171/02C09D7/12C09D7/00C08L67/02
CPCC08J7/0427C08J2367/02C08J2463/10C09D7/20C09D7/65C09D7/68C09D163/10C08L71/02C08K9/10C08K2003/3045
Inventor 李彦
Owner SUZHOU KECHUANG ELECTRONICS MATERIAL CO LTD
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