公开(公告)号：US11512232B2

公开(公告)日：2022-11-29

申请号：US16656985

申请日：2019-10-18

Applicant: NITTO DENKO CORPORATION

Inventor： Ryo Morioka ,  Masataka Nishiwaki ,  Toshiki Ikami ,  Yasushi Buzojima

IPC: C09J7/38 ,  C09J7/40 ,  C08K3/04 ,  B32B7/12

Abstract: The invention provides a PSA sheet having a PSA layer exhibiting superior light shielding. Provided is a PSA sheet comprising a PSA layer that includes a PSA polymer. Carbon black particles are dispersed in the PSA layer. The average particle size of the carbon black particles dispersed in the PSA layer is 300 nm or smaller. The average particle size is an average particle size determined on the basis of a number-based particle size distribution by TEM observation.

公开(公告)号：US20200148919A1

公开(公告)日：2020-05-14

申请号：US16682005

申请日：2019-11-13

Applicant: Nitto Denko Corporation

Inventor： Toshiki Ikami ,  Yasushi Buzojima ,  Kenta Jozuka ,  Naoaki Higuchi ,  Midori Segawa ,  Naohiro Kato

IPC: C09J7/38 ,  C09J133/08 ,  B32B27/06

Abstract: Provided is a PSA sheet capable of providing reliable adhesion even upon exposure to cosmetics, chemicals and the like containing polar compounds. The PSA sheet provided by this invention has a PSA layer comprising a polyester-based polymer. The PSA sheet has a 180° peel strength of 1 N/5 mm or greater after ethanol immersion.

公开(公告)号：US20200017726A1

公开(公告)日：2020-01-16

申请号：US16505814

申请日：2019-07-09

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiki Ikami ,  Naoaki Higuchi ,  Kenta Jozuka

IPC: C09J7/38 ,  C09J11/08 ,  C09J7/26 ,  B32B7/12 ,  G06F3/041

Abstract: Provided is a PSA sheet that provides reliable adhesion even upon contact with grease. Provided is an adhesively double-faced PSA sheet having a PSA layer. The PSA sheet has an initial push-peel strength of 0.5 MPa or greater. It has an adhesive strength retention rate of 25% or higher, determined as the ratio of the push-peel strength at 24 hours after artificial sebum application to the push-peel strength before the artificial sebum application.