US 11,891,551 B2
Double-sided pressure-sensitive adhesive tape
Takuya Fujita, Ibaraki (JP); Hiromichi Sumida, Ibaraki (JP); Masahito Niwa, Ibaraki (JP); Masataka Nishiwaki, Ibaraki (JP); and Yasushi Buzojima, Ibaraki (JP)
Assigned to NITTO DENKO CORPORATION, Ibaraki (JP)
Filed by NITTO DENKO CORPORATION, Ibaraki (JP)
Filed on Oct. 14, 2020, as Appl. No. 17/070,257.
Claims priority of application No. 2019-230737 (JP), filed on Dec. 20, 2019.
Prior Publication US 2021/0189190 A1, Jun. 24, 2021
Int. Cl. C09J 7/25 (2018.01); C09J 7/38 (2018.01)
CPC C09J 7/385 (2018.01) [C09J 7/25 (2018.01); C09J 2301/124 (2020.08); C09J 2433/00 (2013.01); C09J 2475/006 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A double-sided pressure-sensitive adhesive tape, comprising:
a base material layer formed of an unfoamed resin film containing a polyurethane-based resin as a main component; and
pressure-sensitive adhesive layers arranged on both surface sides of the base material layer,
wherein the pressure-sensitive adhesive layers are each formed from a pressure-sensitive adhesive composition,
wherein the pressure-sensitive adhesive composition contains at least one kind selected from the group consisting of a monomer component (m) and a polymer component (P) obtained by polymerizing the monomer component (m),
wherein the monomer component (m) contains 50 wt % or more of butyl (meth)acrylate,
wherein a ratio of a thickness of the base material layer to a total thickness of the double-sided pressure-sensitive adhesive tape is less than 35%, and
wherein the double-sided pressure-sensitive adhesive tape has a force, which is generated at 100% strain at 23° C. and 50% RH, of from 30 N/m to 150 N/m.