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Mold release film

A release film and release layer technology, applied in applications, coatings, household appliances, etc., can solve problems such as failures and residues of precision electronic equipment, and achieve the effect of good peelability and good solvent resistance.

Pending Publication Date: 2020-04-21
TORAY ADVANCED FILM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Silicone-based compounds are generally used in the release layer of the release film. However, if silicone-based compounds are used in applications related to precision electronic equipment, the low-molecular-weight silicone-based compounds contained in the release layer Will be transferred to the adhesive layer and remain in precision electronic equipment, which may cause failure of precision electronic equipment

Method used

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  • Mold release film
  • Mold release film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0183] The following release layer coating solution p1 (active energy ray curable composition) was applied to one side of the polyester film 1 with a gravure coater, dried at 100°C, and then irradiated at 300 mJ / cm 2 Ultraviolet rays are used to cure it and form a release layer to make a release film. The thickness of the release layer was 200 nm.

[0184]

[0185] 25 parts by mass of the polymerizable long-chain alkyl compound (α1) synthesized below, 75 parts by mass of dipentaerythritol hexaacrylate (trade name "DPHA" of DAICEL-CYTEC Co., Ltd.) as the polymerizable compound (β), After heating up to 100 degreeC and 10 mass parts of photoinitiators (Ciba Specialty Chemicals Co., Ltd. product Irgacure 184), it mixed for 1 hour, and obtained the active energy ray curable composition. This composition was made into the solid content concentration of 4 mass % with the mixed solvent of toluene and isopropanol (toluene:IPA=3:1 (mass ratio)), and the coating liquid was prepared. ...

Embodiment 2

[0189] Except having changed into the following release layer coating liquid p2 (active energy ray curable composition), it carried out similarly to Example 1, and produced the release film.

[0190]

[0191] 15 parts by mass of the polymerizable long-chain alkyl compound (α2) synthesized below, 85 parts by mass of dipentaerythritol hexaacrylate (trade name "DPHA" of DAICEL-CYTEC Co., Ltd.) as the polymerizable compound (β), After heating up to 100 degreeC and 10 mass parts of photoinitiators (Ciba Specialty Chemicals Co., Ltd. product Irgacure 184), it mixed for 1 hour, and obtained the active energy ray curable composition. This composition was made into the solid content concentration of 4 mass % with the mixed solvent of toluene and isopropanol (toluene:IPA=3:1 (mass ratio)), and the coating liquid was prepared.

[0192]

[0193] Into a flask equipped with a stirrer and a thermometer, 100 parts by mass of 2-hydroxyethyl acrylate (Nippon Shokubai Co., Ltd. "BHEA" as a (...

Embodiment 3

[0195] Except having changed into the following release layer coating liquid p3 (active energy ray curable composition), it carried out similarly to Example 1, and produced the release film.

[0196]

[0197] Using a mixed solvent of toluene and isopropanol (toluene:IPA=3:1 (mass ratio)), 10 parts by mass of the non-polymerizable long-chain alkyl compound synthesized below, aminomethyl as the polymerizable compound (β) 66 parts by mass of ester acrylate ("UA-306T" manufactured by Kyoeisha Chemicals Co., Ltd.), 33 parts by mass of tricyclodecane dimethanol acrylate, and 3 parts by mass of photopolymerization initiator (Irgacure 184 manufactured by Ciba Specialty Chemicals Co., Ltd.) The solid content concentration of mass % was prepared as a coating liquid.

[0198]

[0199] To a 4-necked flask equipped with a stirrer, a nitrogen introduction tube, a condenser tube, and a rubber diaphragm, 50 parts by mass of octadecyl acrylate and 1.2 parts by mass of 2,2'-bipyridine were ...

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Abstract

The purpose of the present invention is to provide a mold release film simultaneously satisfying the following: a defect inspection of a film to be transferred can be suitably performed; the mold release film can be easily identified; solvent resistance is good; and separability after heating is good. This mold release film for achieving the above purpose has the following configuration. Specifically, the mold release film has a mold release layer on at least one surface of a substrate film, wherein the haze value of the mold release film is 1.5% to 8.0%, and the mold release layer is a curedlayer of an active energy ray curable composition including a compound that has an alkyl group containing 8 or more carbon atoms.

Description

technical field [0001] The present invention relates to release films. Specifically, it relates to a release layer provided with a release layer formed of a cured layer of an active energy ray-curable composition containing a long-chain alkyl compound (a compound having an alkyl group having 8 or more carbon atoms) on a base film membrane. Background technique [0002] The release film is used for the purpose of protecting the surface of the adhesive layer used in the manufacturing process of precision electronic devices such as ceramic capacitors, hard disk drives, and semiconductor devices. Moreover, a release film is also used as a carrier film at the time of manufacture of an adhesive sheet. Furthermore, the release film is used as a carrier film when molding a green sheet, an optical resin sheet, a photosensitive resin sheet, or the like. [0003] A release layer for the purpose of improving peelability is usually provided in a release film. [0004] Silicone-based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00B32B7/02B32B7/023B32B7/06B32B27/36B32B27/16B32B33/00B29C67/02B29L7/00
CPCB32B7/02B32B7/06B32B27/00B32B27/08B32B27/36C08J7/04C08J2367/02
Inventor 辻内直树中垣贵充
Owner TORAY ADVANCED FILM CO LTD