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Title:
FOAMING ADHESIVE SHEET AND ARTICLE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/145504
Kind Code:
A1
Abstract:
A foaming adhesive sheet comprising a first adhesive layer that contains a curable adhesive and a foaming agent, and a second adhesive layer that is disposed on one surface of the first adhesive layer, contains a curable adhesive, and does not contain a foaming agent, wherein: the tack of the first adhesive layer and the second adhesive layer is 0 gf to less than 10 gf; and the thickness of the first adhesive layer and the thickness from the first adhesive layer surface on the opposite side from the second adhesive layer to the second adhesive layer surface on the opposite side from the first adhesive layer are set such that, when the foaming adhesive sheet has been foamed and cured until the thickness from the first adhesive layer surface on the opposite side from the second adhesive layer to the second adhesive layer surface on the opposite side from the first adhesive layer is the distance between a first member and a second member, the foaming ratio E represented by formula (1): E=(G1-T2)/T1 (E: foaming ratio, G1: distance between the first member and the second member, T1: thickness of the first adhesive layer before foaming and curing, and T2: thickness from the first adhesive layer surface on the opposite side from the second adhesive layer to the second adhesive layer surface on the opposite side from the first adhesive layer before foaming and curing) is greater than 1.0 and at most 8.5.

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Inventors:
MORIOKA YUTAKA (JP)
SEGAWA TOSHIKAZU (JP)
HOSHI KENTARO (JP)
MAEDA NAO (JP)
Application Number:
PCT/JP2023/000950
Publication Date:
August 03, 2023
Filing Date:
January 16, 2023
Export Citation:
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Assignee:
DAINIPPON PRINTING CO LTD (JP)
International Classes:
C09J7/30; B32B27/00; C09J5/08; C09J11/06; C09J201/00
Domestic Patent References:
WO2016163514A12016-10-13
WO2021059154A12021-04-01
Foreign References:
JP2017052950A2017-03-16
JP2021155495A2021-10-07
JP2013104044A2013-05-30
Attorney, Agent or Firm:
YAMASHITA, Akihiko et al. (JP)
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