Self-rolling adhesive film

A film-bonding and winding technology, applied in pressure-sensitive films/sheets, film/sheet-like adhesives, adhesives, etc., can solve the problems of difficulty in recycling and easy deformation, and achieve uniform peeling stress and reliable surface protection effect of function

Inactive Publication Date: 2013-09-11
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because, in order to recover the film deformed into a cylindrical shape by a practically useful method, it is conceivable to use the recovery of the release film, pick up with a robot arm, etc., and blow it away with the wind (Patent Document 6), but in either In the method, when the cylindrical shape is easily deformed due to the stress in these recycling operations, there is a concern that the adhesive film will reattach to the workpiece, etc., making it difficult to recycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0172] One side of a 50 μm thick PET film "LUMIRROR S10" manufactured by Toray Industries, Inc. was coated with a 1% silicone release agent diluted with heptane (manufactured by Shin-Etsu Silicone Co., Ltd., trade name: Molding agent "KS-774" and catalysts "CAT PLR-1", "PLR-2" and "CAT PL-50T") were dried to obtain separator 1. The arithmetic mean roughness Ra of the release agent coated surface was 0.03 μm.

[0173] Production example of separator 2

[0174] One surface of a 50-μm-thick PET film "LUMIRROR S10" manufactured by Toray Industries, Inc. was sandblasted, and a silicone mold release agent (manufactured by Shin-Etsu Silicone Co., Ltd., trade name: mold release) was applied to the treated surface. agent "KS-774" and catalysts "CAT PLR-1", "PLR-2" and "CAT PL-50T"), and dried to obtain a separator 2. The arithmetic mean roughness Ra of the release agent coated surface is 0.12 μm.

[0175] Production example of separator 3

[0176] One surface of a 50-μm-thick PET f...

Embodiment 1

[0217] Using a die coater, apply the UV-curable adhesive mixture obtained in the adhesive production example to a dry film thickness of 30 μm on the release agent-applied surface of the separator 1, and then attach it to the production example The self-winding adhesive film 1 was obtained on the organic coating side of the obtained self-winding adhesive film film. In addition, the adhesive drying was pre-dried at 70°C and then completely dried at 120°C.

Embodiment 2

[0219] A self-winding adhesive film 2 was obtained in the same manner as in Example 1 except that the separator 2 was used instead of the separator 1 .

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Abstract

The invention provides a self-rolling adhesive film. An easily detachable adhesive film, which is deformed into a cylindrical shape by heating to facilitate collection, fails to be sufficiently bonded to the surface of a workpiece, if the surface of the adhesive layer is roughened by the presence of irregularities. Because of this, when water penetrates in dicing, the adhesive layer peels off from the surface of the workpiece and may fail to achieve a surface-protection purpose. In addition, when the easily detachable adhesive film is deformed into a cylindrical shape by heating, detachment stress may not uniformly applied to a workpiece, with the result that the film cannot be smoothly deformed into a cylindrical shape; at the same time, a larger amount of glue remains in the surface of a workpiece than a conventional peel-detachment. A self-rolling adhesive film composed of a multi-layered substrate including at least one thermal contraction film, an adhesive layer and a separator, in which the surface of the adhesive layer after the separator is detached has an arithmetic average roughness Ra of 1.0 [mu]m or less.

Description

technical field [0001] The present invention relates to an adhesive film using a film that is deformed into a cylindrical shape by heating and retains the deformed shape. Background technique [0002] The following patent documents 1 to 3 describe that when the release sheet for the adhesive film is smooth, the surface of the opposing adhesive layer is also smooth, and by using such an adhesive film, it can be adhered to the workpiece and can fully exert its function as an adhesive. function of the composite film. [0003] In addition, the present inventors have been developing an easily peelable adhesive film based on a laminate of heat-shrinkable film layer / adhesive layer (adhesive layer) / rigid resin film layer (Patent Document 4 and 5). [0004] This film is characterized in that the shrinkage stress generated by heating the substrate is converted into torque through the laminate, and the adhesive film can be peeled from the workpiece just like peeling by hand (peel pee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J7/29
CPCH01L21/6836H01L2221/68327H01L2221/6834H01L2221/68381H01L2221/68386C09J7/29Y10T428/14C09J7/22C09J7/401C09J7/38C09J2203/326B32B38/0004B32B38/10
Inventor 木内一之西尾昭德川西道朗
Owner NITTO DENKO CORP
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