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Adhesive material having redetachability

A technology of adhesive materials and peel strength, applied in the direction of film/sheet adhesives, adhesives, thin material processing, etc., can solve problems such as foaming, interface foaming, and adhesive sheets cannot withstand air pressure, etc., to achieve Satisfies the effect of re-peelability and

Active Publication Date: 2012-05-02
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, there are problems as follows: if there is a defect at the adhesive interface of the adherend and the adhesive sheet, foaming, peeling, etc. will occur at the interface.
The reason for this phenomenon is that under high temperature (humidity) conditions or rapid temperature changes, the adhesion strain and defects existing in the adhesive sheet or at the adhesive interface with the adherend are the center, and the internal Air will condense, and the adhesive sheet whose cohesion and adhesive force have changed due to environmental changes cannot withstand the pressure of the air after condensation, and foaming and peeling will occur

Method used

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  • Adhesive material having redetachability
  • Adhesive material having redetachability
  • Adhesive material having redetachability

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0045] Such as figure 1 As shown, the adhesive material 101 (referred to as "this adhesive material 101") of the first embodiment includes at least two adhesive layers 101a, 101b, and the adhesive material has the following configuration: These adhesive layers 101a Between , 101b is an interface (internal peeling interface 101g) that can be peeled on a surface different from the bonding surface of the adhesive material and the adherend.

[0046]In this adhesive material 101, by making the interlayer peeling strength between the adhesive layers 101a, 101b smaller than the peeling strength at the sticking surface of the adherend X and the adhesive layer 101a, and the peeling strength between the adherend Y and the adhesive The peeling strength at the sticking surface of the mixture layer 101b can make the internal peeling interface 101g between the adhesive layers 101a, 101b.

[0047] More specifically, it can be modified by, for example, coating a known release agent on the su...

no. 2 Embodiment approach

[0052] The adhesive material 102 (referred to as "this adhesive material 102") according to the second embodiment is a material having the following structure: having at least two adhesive layers 102a, 102b, and at least one or more adhesive layers bonded to these adhesive layers. One of the interfaces between the layer 102d and the adhesive layers 102a, 102b becomes an internal peeling interface.

[0053] For example, it may be the following structure: at least two layers of adhesive layers 102a, 102b, and at least one base material layer 102d, between the base material layer 102d and at least one layer of adhesive layer 102a, a The interface (internal peeling interface 102g) that is peeled is performed on a surface different from the adhesive surface of the adherend.

[0054] As an example, it can be as figure 2 In the shown configuration, a base material layer 102d exists between two adhesive layers 102a and 102b, and an internal peeling interface 102g is provided between...

no. 3 Embodiment approach

[0073] Such as Figure 4 As shown, the adhesive material 103 according to the third embodiment (referred to as "this adhesive material 103") is provided with at least two adhesive layers 103a, 103b and at least two base material layers 103c, 103d, and is equipped with An adhesive material having a structure in which a peelable interface (internal peeling interface 103g ) is provided between the base material layer 103c and the base material layer 103d is provided on a surface different from the adherend surface.

[0074] In this adhesive material 103, in order to provide the internal peeling interface 103g between the base material layer 103c and the base material layer 103d, the peel strength between the base material layer 103c and the base material layer 103d should be lower than that of the adherend X and the adhesive. The peel strength of the agent layer 103a, the peel strength of the adherend Y and the adhesive layer 103b, the peel strength of the base material layer 103...

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Abstract

Disclosed is an adhesive material which has redetachability and also achieves the reliability of an adhesive surface with respect to detachment, the occurrence of foaming, etc. Specifically disclosed is an adhesive material to be used for bonding two adherends and having an interface (internal detachment interface), which is different from bonding surfaces of the adhesive material with the adherends, in the inside. Since the adhesive material has the internal detachment interface in the inside, the reliability of the adhesive surfaces with the adherends can be increased independent of the internal detachment interface.

Description

technical field [0001] The present invention relates to a releasable adhesive material capable of bonding two members (adhered bodies) together, and an image display device using the adhesive material. , and can be peeled off after bonding. Background technique [0002] In flat-panel image display devices used in mobile phones, PHS machines, PDA terminals, portable game machines, computers, car navigation systems, digital cameras, etc., in order to achieve the purpose of protecting the surface of the image display unit and giving touch panel functions, etc., in most cases Next, a light-transmitting protective member is provided on the light-emitting side of the image display unit. At this time, if there is a gap (that is, an air layer) between the light-transmitting protective member and the image display unit, not only will the outgoing light from the image display unit be reflected at the interface with the air layer, and then cause the light to reach the user. The loss ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J201/00G09F9/00C09J7/20
CPCC09J7/02C09J2203/318C09J2201/134C09J7/20Y10T428/2848C09J2301/1242C09J7/403C09J7/30C09J7/22C09J7/40B32B7/06C09J201/00G09F9/00C09J2301/16C09J2301/124
Inventor 新美嘉穗儿稻永诚
Owner MITSUBISHI CHEM CORP
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