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Title:
STRUCTURE, ADHESIVE SHEET, SET AND METHOD
Document Type and Number:
WIPO Patent Application WO/2022/137924
Kind Code:
A1
Abstract:
The present invention provides a structure wherein two adherends are able to be separated by means of water peeling that utilizes an aqueous liquid such as water even in cases where the surfaces of the two adherends to be bonded with each other are hydrophobic. The present invention provides a structure which sequentially comprises a first adhesive layer, an intermediate layer and a second adhesive layer in this order. With respect to this structure, at least one surface of the intermediate layer is a hydrophilic surface. In addition, at least one of the first adhesive layer and the second adhesive layer has a layer A that is arranged on the hydrophilic surface of the intermediate layer. With respect to this structure, the water peel strength decrease rate, which is calculated from the water peel strength A1 (N/10 mm) of the adhesive layer that has the layer A with respect to the intermediate layer and the peel strength A0 (N/10 mm) of the adhesive layer that has the layer A with respect to the intermediate layer by formula (1 – (A1/A0)) × 100, is 70% or more.

Inventors:
KOSAKA NAOFUMI (JP)
SHIMIZU YOSUKE (JP)
KUMAKURA KENTA (JP)
Application Number:
PCT/JP2021/042522
Publication Date:
June 30, 2022
Filing Date:
November 19, 2021
Export Citation:
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Assignee:
NITTO DENKO CORP (JP)
International Classes:
B32B27/00; B32B38/18; C09J5/00; C09J7/38; C09J201/00
Domestic Patent References:
WO2019151194A12019-08-08
WO2019225649A12019-11-28
WO2020027033A12020-02-06
WO2018211850A12018-11-22
WO2021024741A12021-02-11
Foreign References:
JP2010180367A2010-08-19
JP2021095450A2021-06-24
Attorney, Agent or Firm:
OI, Michiko (JP)
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