PRESSURE SENSITIVE ADHESIVE SHEET

WIPO Patent Application WO/2012/132520

A1

The present invention relates to a pressure sensitive adhesive sheet having a pressure sensitive adhesive layer on at least one surface of a backing, wherein: the pressure sensitive adhesive layer has a two-layer configuration of a first pressure sensitive adhesive layer and a second pressure sensitive adhesive layer, in order from the backing; the first pressure sensitive adhesive that configures the first pressure sensitive adhesive layer has a loss tangent (tan δ) value at 0°C of 0.25 or more, and a storage modulus value at 0°C of 0.01 - 0.80 MPa; and the resin component contained in the second pressure sensitive adhesive that configures the second pressure sensitive adhesive layer contains 10 - 100 mass% of an acrylic copolymer having cross-linking functional groups. This pressure sensitive adhesive sheet has excellent adhesive strength even when the pressure sensitive adhesive layer is made thin.

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INAO YOUICHI (JP)
YAMAGUCHI SEITARO (JP)
KASHIO MIKIHIRO (JP)
KAWADA SATOSHI (JP)

PCT/JP2012/051474

October 04, 2012

January 24, 2012

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LINTEC CORP (JP)
INAO YOUICHI (JP)
YAMAGUCHI SEITARO (JP)
KASHIO MIKIHIRO (JP)
KAWADA SATOSHI (JP)

C09J7/38; B32B27/00; B32B27/30; C09J123/22; C09J133/00; C09J175/04; C09J201/00

JP2009114394A	2009-05-28
JPH0532943A	1993-02-09
JPH11189753A	1999-07-13
JP2011042777A	2011-03-03
JP2008274163A	2008-11-13
JP2003238908A	2003-08-27
JP2006082465A	2006-03-30
JP2008208310A	2008-09-11

OHTANI, Tamotsu et al. (JP)
Tamotsu Otani (JP)

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