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Base-less double-sided adhesive sheet

A double-sided sticky, no-substrate technology, applied in the direction of adhesives, adhesive products, films/sheets without carriers, etc., can solve the problems of stripping electrification, difficult stripping, not necessarily sufficient, etc., and achieve the effect of good mold release.

Active Publication Date: 2015-07-15
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, when a release film is used, peeling electrification may occur when peeling it from the adhesive layer. As a result, product defects due to adhesion or entanglement of foreign matter may occur at the processing site. Occurrence and other adverse situations
Therefore, only the antistatic measures corresponding to the passing equipment in the manufacturing process are not necessarily sufficient, and the antistatic treatment from the release film itself is urgently desired.
In addition, in the release film provided with the release layer of the heavy release type, when the release film is peeled after being bonded to the adhesive layer for a long time, there is a tendency for heavy release.
As in the present invention, when the release film is bonded through the adhesive layer, when the ratio of the peeling force deviates from the desired range, when peeling is originally required, problems such as difficulty in peeling may occur.

Method used

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  • Base-less double-sided adhesive sheet
  • Base-less double-sided adhesive sheet
  • Base-less double-sided adhesive sheet

Examples

Experimental program
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Effect test

Embodiment

[0122] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to the following examples unless the gist is exceeded. In addition, the measuring method used in this invention is as follows.

[0123] (1) Determination of the intrinsic viscosity of polyester:

[0124] Accurately weigh 1 g of polyester after removing other polymer components and pigments that are incompatible in polyester, add 100 ml of mixed solvent of phenol / tetrachloroethane=50 / 50 (weight ratio) to dissolve it, and dissolve it at 30 ° C To measure.

[0125] (2) Average particle size (d 50 : μm) Determination:

[0126] The value of the cumulative (weight basis) 50% of the equivalent spherical distribution measured using a centrifugal sedimentation type particle size distribution analyzer (SA-CP3 manufactured by Shimadzu Corporation) was defined as the average particle diameter.

[0127] (3) Determination of glass transition temperature ...

manufacture example 1

[0206] Production example 1 (polyethylene terephthalate A1)

[0207]Take 100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, and 0.09 parts of magnesium acetate tetrahydrate into the reactor, heat up with heating, distill off the methanol, and carry out the transesterification reaction. It takes 4 hours to raise the temperature from the start of the reaction At 230°C, the transesterification reaction is substantially over. Next, after adding 0.04 parts of ethylene glycol slurry ethyl acid phosphate and 0.03 parts of antimony trioxide, the temperature was raised to 280° C. and the pressure to 15 mmHg over 100 minutes, and then the pressure was gradually lowered to finally reach 0.3 mmHg. After 4 hours, the inside of the system was returned to normal pressure to obtain polyethylene terephthalate A1 with an intrinsic viscosity of 0.61.

manufacture example 2

[0208] Production example 2 (polyethylene terephthalate A2)

[0209] In Production Example 1, except that 0.6 parts of silica particles having an average particle diameter of 2.5 μm was added, it was produced in the same manner as in Production Example 1 to obtain polyethylene terephthalate A2 with an intrinsic viscosity of 0.62.

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Abstract

Provided is a base-less double-sided adhesive sheet, which can exhibit good antistatic performance and releasability when used as, for example, a member for a capacitive touch panel, and in which release films contained therein have oligomer-blocking performance. A base-less double-sided adhesive sheet comprising an adhesive agent layer and release films respectively laminated on both surfaces of the adhesive agent layer and having different peel forces from each other, wherein the peel force of the first release film is smaller than that of the second release film, and at least one of the release films is produced by laminating a coating layer comprising an electrically conductive compound (A) and a binder polymer (B) on a polyester film and then laminating a release layer on the coating layer.

Description

technical field [0001] The present invention relates to a substrate-less double-sided adhesive sheet, which has good antistatic properties, mold release properties, oligomer sealing properties, and coating appearance, does not generate peeling electrification when the release film is peeled off, and can be peeled off with good sexual stripping. In addition, after application of the adhesive or after lamination of the release film, there is little fluctuation in peeling from the adhesive layer, and there is very little transfer and precipitation of oligomers to the adhesive layer. For example, there are provided substrateless double-sided adhesive sheets suitable for various applications such as production of liquid crystal polarizing plates and production of capacitive touch panels via an adhesive layer. Background technique [0002] Conventionally, various types of adhesive sheets for surface-bonding objects are known, and as one of the adhesive sheets, a double-sided adhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00B32B27/00C09D5/24C09J201/00B32B27/36C09J7/10
CPCB32B2405/00C08G2261/1424C09J2433/00C09J201/00C09J2201/134C09J2467/006C08G2261/3223C09J2467/005C09J2203/318C09J2433/005C09J7/00C08L65/00C09J7/0228B32B27/36C09J2465/005C09J2475/005C09D5/24C08G2261/794C09J7/401C09J7/10C09J2301/1242C09J7/20B32B27/00
Inventor 田中义和井崎公裕斋藤智久
Owner MITSUBISHI CHEM CORP