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Mold release film

A release film and curing technology, which is applied in the direction of electrical components, circuits, layered products, etc., can solve the problems of poor air exposure due to transfer, different material expansion and contraction, and reduced productivity, and achieve air exposure resistance and Excellent non-transferability, high industrial value, excellent retention effect

Active Publication Date: 2011-02-02
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when cutting, perforating or storing polarizers, the degree of expansion and contraction of the material varies due to changes in temperature and humidity during storage, and curling and floating are likely to occur, which will lead to a decrease in productivity.
[0005] For existing films, it is not necessarily sufficient to simultaneously satisfy the two aspects of light peeling when peeling at high speed and heavy peeling at low speed that is closely related to holding force. In addition, for this purpose, the release type is changed. In the design of the layer, the performance may not be sufficient due to the transferability caused by the component that cannot be fixed with the polymer, and the air exposure that causes heavy peeling due to the contact between the release surface and the air.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0071] On a 38 μm thick biaxially stretched PET film (manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.: Diafoil T100-38), the coating weight (after drying) is about 0.12 (g / m 2 ) to apply a release agent comprising the following composition, and heat-treat at 150° C. for 10 seconds to obtain a release film.

[0072] "Release agent composition"

[0073] The following three components (i) to (iii) were diluted with a mixed solvent of toluene / MEK / isooctane (mixing ratio 1:1:1) to prepare a coating liquid having a solid content concentration of 2% by weight.

[0074] (i) The viscosity of a 30% toluene solution is 15,000 mPa·s, and a solvent-type silicone (manufactured by Shin-Etsu Chemical Co., Ltd.: KS-830, non-volatile) containing about 5% vinyl groups in terms of siloxane units in the main polymer Ingredient 30%)...100 parts by weight

[0075] (ii) with (CH 3 ) 3 SiO(-SiH(CH 3 )-O) m -Si(CH 3 ) 3 Indicated silicone (manufactured by Gelest: HMS-991, viscosity...

Embodiment 2A

[0078] Except having changed the release agent composition in Example 1A into the following release agent composition, it manufactured similarly to Example 1A, and obtained the release film.

[0079] "Release agent composition"

[0080] The following three components (i) to (iii) were diluted with a mixed solvent of toluene / MEK / isooctane (mixing ratio 1:1:1) to prepare a coating liquid having a solid content concentration of 2% by weight.

[0081] (i) The viscosity of a 30% toluene solution is 15,000 mPa·s, and a solvent-type silicone (manufactured by Shin-Etsu Chemical Co., Ltd.: KS-830, non-volatile) containing about 5% vinyl groups in terms of siloxane units in the main polymer Ingredient 30%)...100 parts by weight

[0082] (ii) with (CH 3 ) 3 SiO(-SiH(CH 3 )-O) m -Si(CH 3 ) 3 Indicated silicone (manufactured by Gelest: HMS-991, viscosity about 20mPa·s)...1 part by weight

[0083] (iii) Platinum-containing catalyst (manufactured by Shin-Etsu Chemical Co., Ltd.: catP...

Embodiment 3A

[0085] Except having changed the release agent composition in Example 1A into the following release agent composition, it manufactured similarly to Example 1A, and obtained the release film.

[0086] "Release agent composition"

[0087] The following three components (i) to (iii) were diluted with a mixed solvent of toluene / MEK / isooctane (mixing ratio 1:1:1) to prepare a coating liquid having a solid content concentration of 2% by weight.

[0088] (i) The viscosity of a 30% toluene solution is 8000 mPa·s, and the main polymer contains about 8% of vinyl groups in terms of siloxane units (Shin-Etsu Chemical Co., Ltd.: KS-3601, non-volatile Ingredient 30%)...100 parts by weight

[0089] (ii) with (CH 3 ) 3 SiO(-SiH(CH 3 )-O) m -Si(CH 3 ) 3 Indicated silicone (manufactured by Gelest: HMS-991, viscosity about 20mPa·s)...3 parts by weight

[0090] (iii) Platinum-containing catalyst (manufactured by Shin-Etsu Chemical Co., Ltd.: catPL-50T)...1 part by weight

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Abstract

Disclosed is a mold release film which has such a peel force as to permit light peeling and exerts excellent holding power in storage and which has excellent atmospheric exposure resistance and excellent migration resistance. A mold release film produced by coating at least one side of a polyester film with a curable silicone-based coating material, wherein the vinyl-containing polysiloxane chain of the curable silicone constituting the coating material has a vinyl content of 3% or above in terms of siloxane unit and the SiH / Vi ratio of the coating material is 2.5 to 7.

Description

technical field [0001] The invention relates to a release film. Background technique [0002] Release films based on polyester films are used in the manufacture of liquid crystal polarizers, phase difference plate components, PDP components, organic EL components, etc., and various display structures due to their excellent characteristics. For parts manufacturing, etc., various optical applications, etc. Among them, especially the release film for liquid crystal polarizing plate, its production volume has increased rapidly along with the remarkable growth of the LCD market in recent years. In addition, with the reduction in the cost of LCDs, in order to achieve a reduction in the cost of components, it is currently a major issue to improve the production yield and to speed up the production. [0003] The need for high-speed manufacturing has reached the process of attaching polarizers to liquid crystal panels. In order to shorten the takt time when attaching the LCD polar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00G02B5/30
CPCH01L21/566H01L2924/0002Y10T428/31663H01L2924/00
Inventor 林崎惠一
Owner MITSUBISHI CHEM CORP
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