公开(公告)号：US10676649B2

公开(公告)日：2020-06-09

申请号：US15762907

申请日：2016-09-27

Applicant: LINTEC CORPORATION

Inventor： Kazue Uemura ,  Kiichiro Kato ,  Yumiko Amino ,  Koji Tsuchibuchi ,  Takamasa Kase ,  Yusuke Matsuoka

IPC: C09J7/38 ,  C09J11/02 ,  C09J7/20 ,  B32B7/06 ,  B32B27/00 ,  C09J201/00 ,  C09J7/25 ,  B32B7/12 ,  B32B27/08 ,  B32B27/36 ,  C09J11/04

Abstract: A pressure sensitive adhesive sheet including, on a substrate or a release material, a resin layer, at least a surface (α) of the resin layer on the opposite to the side on which the substrate or release material is provided having pressure sensitive adhesiveness, wherein a concave portion and a flat face exist on the surface (α) of the resin layer, and a width of the concave portion observed from the side of the surface (α) is non-uniform, and in a region (D) of 8 mm in length×10 mm in width as freely-selected on the surface (α), a concave portion having an area of 70 to 99.99% relative to 100% of a total area of the concave portions existing in the region (D) exists.

公开(公告)号：US10655036B2

公开(公告)日：2020-05-19

申请号：US15762909

申请日：2016-09-27

Applicant: LINTEC CORPORATION

Inventor： Kazue Uemura ,  Yusuke Matsuoka ,  Takamasa Kase ,  Kiichiro Kato

IPC: C09J7/38 ,  B32B3/30 ,  B32B27/00 ,  B32B7/06 ,  C08K3/36 ,  C08K3/22 ,  B32B7/12 ,  B32B27/20 ,  B32B27/36 ,  C09J11/04

Abstract: Provided is a pressure sensitive adhesive sheet including a resin layer on a substrate or a release material, at least a surface (α) of the resin layer on the side opposite to the side thereof on which the substrate or the release material is provided having pressure sensitive adhesiveness, wherein a concave portion and plural flat faces having an irregular shape exist in a region (Dc) surrounded by an arbitrarily predetermined circle on the surface (α) of the resin layer; and with respect to one or more flat faces (S) among the plural flat faces, the one or more flat faces (S) excluding flat faces having a cumulative relative frequency of 30% or less determined by adding the relative frequency from the respective flat faces with a smaller area, an rMAX value of the flat faces (S) calculated from specified operations is 0.60 or less.