The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2025
Filed:
Mar. 24, 2022
Nitto Denko Corporation, Ibaraki, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Abstract
A radiation curable pressure-sensitive adhesive sheetof the present invention has a pressure-sensitive adhesive layerthat is cured by irradiation with radiation. The pressure-sensitive adhesive layercontains a photopolymerization initiatorand a crosslinking agent, and the curing by irradiation with radiation is curing by a reaction between the photopolymerization initiatorand the crosslinking agent. In the radiation curable pressure-sensitive adhesive sheetof the present invention, when the pressure-sensitive adhesive layeris stored at 50° C. for 4 weeks, a rate of change in residual stress (N/cm) expressed by the following equation is 70% or less.Residual stress change rate (%)=(residual stress after storage at 50° C. for 4 weeks−initial residual stress)/(initial residual stress)×100