Self-rolling adhesive film

A film-bonding and winding technology, applied in the direction of bonding method, pressure-sensitive film/sheet, film/sheet release liner, etc., can solve the problems of easy deformation, difficult to recycle, etc., to prevent damage and improve productivity , the effect of reducing peel stress
CN103289585AInactive Publication Date: 2013-09-11NITTO DENKO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NITTO DENKO CORP
Publication Date
2013-09-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a self-rolling adhesive film. In detachment by self-rolling, if the leading end of the rolling adhesive layer comes into contact with the rear surface thereof, which is not an adhesive layer side of an easily detachable adhesive sheet, the diameter of the circular cross section of a roll cannot be reduced. If so, the detachment angle is lowered. Because of this, it becomes difficult to minimize detachment stress and the amount of remaining glue increases. Furthermore, if rolling into a cylindrical roll is stopped in the middle, for example, the shape of a roll becomes unstable. Consequently, it is difficult to smoothly deform into a cylindrical roll and subsequently collect an easy detachable adhesive sheet. Besides these, since stress is concentrated to a local point, there is a high possibility of breaking a workpiece. A self-rolling adhesive film formed by laminating a substrate film formed of a laminate having at least one thermal contraction film and an adhesive layer on a surface of the substrate film, not formed of a thermal contraction film, in which shear stress between the surface of the thermal contraction film of the substrate film and the adhesive layer thereof is 240 g / mm 2 or less.
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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 inventors of the present invention have been developing an easily peelable adhesive sheet based on a laminate of heat-shrinkable film layer / adhesive layer (adhesive layer) / rigid resin film layer (Patent Documents 1 and 2)

[0003] This sheet is characterized in that shrinkage stress generated by heating the base material is converted into torque through the laminate, and the PSA sheet can be peeled from the workpiece just like peeling by hand (peel peeling). In addition, the tape shape after peeling was cylindrical.

[0004] In order for the sheet to be practically useful, it is necessary to collect the cylindrical object easily, and more specifically, it is necessary to maintain the state in which the sheet is peeled off into a cylindrical shape. This is because, in orde...

Claims

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