公开(公告)号：US20170174944A1

公开(公告)日：2017-06-22

申请号：US15129955

申请日：2015-04-02

Applicant: LINTEC CORPORATION

Inventor： Kiichiro KATO ,  Kazue UEMURA ,  Yumiko AMINO ,  Shigeru SAITO

IPC: C09J7/02 ,  C09J11/04

CPC classification number: C09J7/38 ,  C08K3/22 ,  C08K3/36 ,  C09J7/385 ,  C09J11/04 ,  C09J133/08 ,  C09J2201/28 ,  C09J2201/606 ,  C09J2205/102 ,  C09J2433/00 ,  C08F2220/1825 ,  C08F220/06

Abstract: Provided is a pressure sensitive adhesive sheet containing, on a substrate or a release material, a resin layer that includes a resin part (X) containing a resin as a main component, and a particle part (Y) consisting of fine particles, at least a surface (α) of the resin layer being opposite to the side thereof on which the substrate or the release material is provided having pressure sensitive adhesiveness, wherein plural concave portions having a maximum height difference of 0.5 μm or more exist in a predetermined region (P) on the surface (α), and 95% or more of the plural concave portions existing inside the region (P) have shapes differing from each other, and one or more such concave portions exist in a predetermined region (Q) on the surface (α). When attached to an adherend, the pressure sensitive adhesive sheet can readily remove air accumulation to be formed and therefore exhibits excellent air escape property, and has good blister resistance and pressure sensitive adhesion characteristics.