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Release film with excellent peelability

A release film and release agent technology, used in film/sheet release liners, synthetic resin layered products, coatings, etc.

Active Publication Date: 2020-07-07
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These proposals all take into account both antistatic performance and mold release performance by providing an antistatic layer between the base film and the release agent layer, but in terms of release performance, there is no big difference from the release performance of the usual release film. beyond existing technology

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

[0086] (release film of Example 1)

[0087] 5 parts by weight of addition reaction silicone (manufactured by Dow Corning Toray Co., Ltd., trade name: SRX-345), 0.75 parts by weight of lithium bis(fluorosulfonyl)imide, 1:1 of toluene and ethyl acetate 95 parts by weight of a mixed solvent of 1, 0.05 parts by weight of a platinum catalyst (manufactured by DowCorning Toray Co., Ltd., trade name: SRX-212) were blended, stirred and mixed, and the first release agent layer forming Example 1 was prepared. (hereinafter referred to as the coating material for the release agent layer A).

[0088] On the surface of a polyethylene terephthalate film having a thickness of 38 μm, the paint forming the release agent layer A of Example 1 was applied using a Meyer rod so that the thickness after drying was 0.1 μm. Then, it heated for 1 minute using the hot air circulation oven of 120 degreeC, and the mold release agent layer A was formed.

[0089] Then, 30 parts by weight of an addition reac...

Embodiment 2

[0091] (release film of Example 2)

[0092] Except that an ethyl silicate-based antistatic agent (COLCOAT (registered trademark) N-103X manufactured by COLCOAT CO., LTD.) was set to 20 parts by weight instead of 0.75 parts by weight of lithium bis(fluorosulfonyl)imide as a release agent The release film of Example 2 was obtained in the same manner as in Example 1 except that the antistatic agent contained in layer A was 75 parts by weight of a 1:1 mixed solvent of toluene and ethyl acetate.

Embodiment 3

[0093] (release film of Example 3)

[0094] In addition to setting the thickness after drying of the release agent layer A to 0.3 μm and the thickness after drying of the release agent layer B to 0.7 μm, amorphous silica ( FUJI SILYSIA CHEMICAL TD., trade name: Sylysia (registered trademark) 310P) instead of silicone resin polymer microparticles (MomentivePerformance Materials Inc., trade name: Tospearl (registered trademark) 120), the same as in Example 2 mode, the release film of Example 3 was obtained.

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Abstract

The present invention provides a release film with excellent peelability, which has small peel strength, of which the peel strength is difficult to increase even when time elapses in a state of being attached to an adhesive layer, and which does not lower adhesion of the attached adhesive layer since transition of a silicon component to the adhesive layer is low. In addition, the provided release film has a low quantity of charge when being handled, and peeled from an adherend. The release film (5) having, on at least one side surface of a base film (1), a two-layered release agent layer in which a first release agent layer (2) including an antistatic agent but not including particles, and a second release agent layer (4) including particles (3) are stacked in order. The total thickness of the first release agent layer (2) and the second release layer (4) is 0.4-2.0 μm; the protrusion height from the surface of the second release agent layer (4) to the peak of the particle (3) is greater than the above total thickness; and the release agent layers (2, 4) on both side surfaces include a silicon-based release agent.

Description

technical field [0001] The present invention relates to a release film for protecting an adhesive layer in various adhesive products or optical members having an adhesive layer. More specifically, it relates to a release film excellent in releasability, which has a small releasable force and is difficult to increase the releasable force over time even in a state where it is bonded to an adhesive layer, and the transfer of the silicone component to the adhesive layer Therefore, the adhesive force of the bonded adhesive layer does not decrease, and the charge amount when the release film is used and when the release film is peeled from the adherend is small. Background technique [0002] Traditionally, release films (sometimes also referred to as release films) have been used for various applications. Among them, it is widely used as a release film for molding green sheets used in the manufacture of various ceramic electronic components such as laminated ceramic capacitors an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/06B32B33/00B32B3/08B32B7/06C09D183/04C09D7/61C08J7/04C08L67/02
CPCB32B3/08B32B7/06B32B27/06B32B27/08B32B27/36B32B33/00B32B2255/10B32B2255/26B32B2255/28B32B2307/21C08J7/042C08J2367/02C08J2483/04C08L2205/025C08L2205/18C09D183/04C08L83/04B32B27/20B32B2405/00C09J7/40
Inventor 宫坂洋之林益史
Owner FUJIMORI KOGYO CO LTD