Patent ID: 7867610
Filing Date: 2011-01-11
Classification: C08L,C09J,Y10T

Abstract:
1. A double-sided pressure-sensitive adhesive sheet comprising a substrate composed of a nonwoven fabric and a pressure-sensitive adhesive layer formed on each side of the substrate, wherein at least one pressure-sensitive adhesive layer is a layer of a water-dispersion acrylic pressure-sensitive adhesive containing a water-dispersion acrylic polymer and a tackifying resin-containing emulsion, and has a thickness of 2 to 150 μm, wherein the water-dispersion acrylic polymer contains 80% by weight or more of an alkyl (meth)acrylate having an alkyl group having 2 to 10 carbon atoms based on the total amount of monomer component constituting the acrylic polymer, wherein the tackifying resin-containing emulsion contains 10 to 100 parts by weight of the tackifying resin having a softening point of 130° C. or higher, relative to 100 parts by weight of the acrylic polymer in the water-dispersion acrylic polymer, wherein a diffusing amount of formaldehyde is less than 3 μg/m wherein the pressure-sensitive adhesive sheet has a 180° peel pressure-sensitive adhesive force with respect to stainless (SUS) plate of 11 N/20 mm or more.