Preparation method of PET low-longitudinal-grain release film with thickness of lower than 38 [mu]m

A release film, longitudinal pattern technology, applied in the direction of film/sheet adhesive, film/sheet release liner, coating, etc., can solve the problem of release film thickness, etc. Reasonable and clear effect of the process

Pending Publication Date: 2020-06-30
扬州万润光电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of PET low longitudinal grain release film with a thickness lower than 38 microns, which solves the problem that the existing release film is thicker

Method used

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  • Preparation method of PET low-longitudinal-grain release film with thickness of lower than 38 [mu]m
  • Preparation method of PET low-longitudinal-grain release film with thickness of lower than 38 [mu]m
  • Preparation method of PET low-longitudinal-grain release film with thickness of lower than 38 [mu]m

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for a PET low longitudinal grain release film with a thickness lower than 38 microns, comprising the following steps:

[0027] Step 1) Take a PET base film with a thickness of 20 μm, and the surface of the base film is treated with corona to increase its surface dyne value and facilitate coating coating;

[0028] Step 2) Take 7 parts of polyethylene wax particles, 10 parts of epoxy-modified silicone resin, 1 part of fluoropolysiloxane, 5 parts of vinyl-terminated silicone resin and 2 parts of glycidyl methacrylate to prepare Release agent, evenly coat the prepared release agent on the front of the PET film by gravure coating;

[0029] Step 3) Vacuum drying the coated coating, the drying time is 12 hours, and the drying temperature is 60°C;

[0030] Step 4) The coating film is subjected to a surface resistance test. The test temperature is 30° C. and the humidity is greater than 50%. If the surface resistance is greater than 100Ω / m2, then proceed to...

Embodiment 2

[0036] A preparation method for a PET low longitudinal grain release film with a thickness lower than 38 microns, comprising the following steps:

[0037] Step 1) Take a PET base film with a thickness of 20 μm, and the surface of the base film is treated with corona to increase its surface dyne value and facilitate coating coating;

[0038] Step 2) Take 9 parts of polyethylene wax, 18 parts of epoxy-modified silicone resin, 5 parts of fluoropolysiloxane, 17 parts of vinyl-terminated silicone resin and 4 parts of glycidyl methacrylate to prepare Release agent, evenly coat the prepared release agent on the front of the PET film by gravure coating;

[0039] Step 3) Vacuum drying the coated coating, the drying time is 13 hours, and the drying temperature is 70°C;

[0040] Step 4) The coating film is subjected to a surface resistance test. The test temperature is 30° C. and the humidity is greater than 50%. If the surface resistance is greater than 100Ω / m2, then proceed to the nex...

Embodiment 3

[0046] A preparation method for a PET low longitudinal grain release film with a thickness lower than 38 microns, comprising the following steps:

[0047] Step 1) Take a PET base film with a thickness of 20 μm, and the surface of the base film is treated with corona to increase its surface dyne value and facilitate coating coating;

[0048] Step 2) Take 11 parts of polyethylene wax particles, 25 parts of epoxy-modified silicone resin, 8 parts of fluoropolysiloxane, 30 parts of vinyl-terminated silicone resin, and 7 parts of glycidyl methacrylate to prepare Release agent, evenly coat the prepared release agent on the front of the PET film by gravure coating;

[0049] Step 3) Vacuum drying the coated coating, the drying time is 14 hours, and the drying temperature is 80°C;

[0050] Step 4) The coating film is subjected to a surface resistance test. The test temperature is 30° C. and the humidity is greater than 50%. If the surface resistance is greater than 100Ω / m2, then procee...

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Abstract

The invention discloses a preparation method of a PET low-longitudinal-grain release film with a thickness of less than 38 [mu]m. The method comprises the following steps: respectively coating the front side surface and the back side surface of a PET base film with a thickness of 20 [mu]m with a release agent liquid and a silicone oil surface liquid, and then carrying out resistance test. According to the invention, after the characteristics of the release film are not influenced, the thickness of the release film is greatly reduced by selecting the thin base film and reducing the coating liquid on the surface of the release film.

Description

technical field [0001] The invention relates to the technical field of release films, in particular to a method for preparing a PET low longitudinal grain release film with a thickness lower than 38 microns. Background technique [0002] With the rapid development of electronic consumer products, electronic consumer products such as smartphones and IPADs are gradually developing in the direction of thinner and portable. Since the adhesion force of the release film stipulated in the electronic product industry should be greater than 5N / 25mm, in order to meet this requirement, the thickness of the glue coated on both sides of the traditional PET film is thicker, resulting in the overall thickness of the release film. It is thicker and cannot meet the requirements for the development of thin electronic products. [0003] The ordinary double-sided tapes sold on the market are thicker, and there is uneven peeling force. The release force of the upper and lower PET release films...

Claims

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Application Information

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IPC IPC(8): C09J7/40C08J7/04C09D183/06C09D123/06C09D183/08C09D183/07C09D175/04C09D7/61C09D5/20C08L67/02
CPCC08J7/04C08J2367/02C08J2423/06C08J2483/06C08J2483/07C08J2483/08C09D7/61C09D7/65C09D175/04C09D183/06C09J7/401C09J7/403C09J2467/005C08L23/06C08L83/08C08L83/04C08K3/34
Inventor 李刚
Owner 扬州万润光电科技股份有限公司
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