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Release film with excellent peelability

A release film and release agent technology, applied in film/sheet adhesives, synthetic resin layered products, chemical instruments and methods, etc. The ketone peeling layer is discontinuous and other problems, and the effect of excellent release property and small peeling force is achieved.

Active Publication Date: 2020-06-05
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the silicone release layer becomes discontinuous due to the inert particles, if it comes into contact with a solvent, the solvent will permeate to the interface between the inert particles and the silicone, and there is a concern that the silicone will fall off
In addition, when a release film is used to protect the surface of the adhesive layer in order to add inert particles having a larger particle size than the thickness of the silicone release layer, the inert particles may adhere to the adhesive layer side, causing the adhesive layer adhesion is reduced

Method used

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  • Release film with excellent peelability
  • Release film with excellent peelability
  • Release film with excellent peelability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (release film of embodiment 1)

[0065] Corona treatment is applied to one surface of a substrate film made of a polyester film with a thickness of 38 μm, and the corona-treated surface is coated with a Meyer bar so that the thickness after drying is 0.1 μm. Reactive silicone release agent A (formed by mixing 0.1 parts by weight of platinum catalyst SRX212 and 90 parts by weight of toluene / ethyl acetate 50 / 50 mixed solvent with 10 parts by weight of SRX-211 manufactured by Toray Dow Corning Corporation) , heated for 1 minute using a hot air circulation dryer at 120°C. After that, on the silicone release agent coated surface, apply the addition reaction silicone release agent B using a Meyer rod so that the thickness of the addition reaction silicone release agent B after drying becomes 0.9 μm. Release agent B (combined with 30 parts by weight of LTC-1056L manufactured by Toray Dow Corning Co., Ltd. by mixing 1 part by weight of platinum catalyst SRX212 and 70 parts by ...

Embodiment 2

[0066] (release film of embodiment 2)

[0067] The dry thickness of the addition reaction type silicone release agent A is 0.3 μm, the dry thickness of the addition reaction type silicone release agent B is 0.7 μm, and the silicone resin polymer particles (Momentive High-Tech Materials Co., Ltd., trade name: Tospearl (registered trademark) 120) was replaced with amorphous silica (manufactured by Fuji Silysia Co., Ltd., trade name: Sylysia (registered trademark) 310P) with a volume-based average particle diameter of 2.7 μm), and other , In the same manner as in Example 1, the release film of Example 2 was obtained.

Embodiment 3

[0068] (release film of embodiment 3)

[0069] The release film of Example 3 was obtained in the same manner as in Example 1 except that the thickness after drying of the addition reaction type silicone-based release agent B was 0.4 μm.

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Abstract

The present invention provides a release film with excellent peelability, which has a small peeling force, and does not easily increase the peeling force even after a long period of time in the state pasted on the adhesive layer, and is due to the silicone component transferred to the adhesive layer. Less, does not reduce the adhesive force of the pasted adhesive layer. The release film is characterized in that it is on at least one surface of the base film (1), and the first release agent layer (2) containing no particles, the inorganic particles containing particles (3) are sequentially laminated. And / or the release film (5) formed by the second release agent layer (4) of polymer particles, the thickness of the first release agent layer (2) is the same as the thickness of the second release agent layer (4) The added total thickness is 0.4-2.0 μm, the average protruding height of the microparticles (3) protruding from the surface of the second release agent layer (4) reaching the apex is above the total thickness, and the second release agent Layer (4) contains a silicone type release agent.

Description

technical field [0001] The present invention relates to a release film used for the protection of an adhesive layer in an optical part having various adhesive products and an adhesive layer. More specifically, it relates to a release film excellent in releasability, which has a small releasable force, and does not easily increase the releasable force even after a long period of time in a state attached to an adhesive layer. The silicone component is small and does not reduce the adhesive force of the pasted adhesive layer. Background technique [0002] Conventionally, release films (also referred to as release films) have been used in various applications. Among them, it is widely used as a release film for forming green sheets used in the manufacture of various ceramic electronic components such as laminated ceramic capacitors and ceramic substrates, and has an adhesive film used in the manufacture of polarizers, optical films, flat panel displays, etc. A release film for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/06B32B27/14B32B27/36
CPCB32B5/16B32B7/06B32B27/14B32B27/36C09J7/20C09J7/201C09J7/22C09J7/255
Inventor 宫坂洋之林益史
Owner FUJIMORI KOGYO CO LTD