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Title:
DOUBLE-SIDED ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2014/156335
Kind Code:
A1
Abstract:
This double-sided adhesive sheet has an adhesive layer comprising a first surface and a second surface, a first release film adhered to the first surface of the adhesive layer, and a second release film adhered to the second surface of the adhesive layer. The storage elastic modulus of the adhesive layer at 23° is 0.3 MPa or greater. The release force for releasing the second release film from the adhesive layer is less than the release force for releasing the first release film from the adhesive layer. The second release film is configured such that the arithmetic average roughness Ra2 of the surface in contact with the adhesive layer is 30nm or less, and greatest protrusion height Rp2 is 250nm or less. Such a double-sided adhesive sheet has excellent durability and precludes the occurrence of air bubbles between the second release film and the adhesive layer (laminate bubbles).

Inventors:
KUROKAWA ATSUSHI (JP)
KAMO MASAYASU (JP)
ENDO YUKI (JP)
Application Number:
PCT/JP2014/052965
Publication Date:
October 02, 2014
Filing Date:
February 07, 2014
Export Citation:
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Assignee:
LINTEC CORP (JP)
International Classes:
B32B27/00; C09J7/10; C09J201/00
Foreign References:
JP2009242562A2009-10-22
JP2013001817A2013-01-07
JP2012184327A2012-09-27
JP2003096414A2003-04-03
JPS6487683A1989-03-31
JP2002327152A2002-11-15
JP2013231137A2013-11-14
JP2013203958A2013-10-07
JP2013133370A2013-07-08
Attorney, Agent or Firm:
ASAHI, Kazuo et al. (JP)
Morning ratio One husband (JP)
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