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:
Apr. 30, 2024
Filed:
Jan. 28, 2019
Nitto Denko Corporation, Ibaraki, JP;
Naofumi Kosaka, Ibaraki, JP;
Yosuke Shimizu, Ibaraki, JP;
Satoshi Honda, Ibaraki, JP;
Taiki Shimokuri, Ibaraki, JP;
Shou Takarada, Ibaraki, JP;
Masayuki Satake, Ibaraki, JP;
Kenichi Okada, Ibaraki, JP;
Atsushi Takashima, Ibaraki, JP;
Ginji Mizuhara, Ibaraki, JP;
NITTO DENKO CORPORATION, Ibaraki, JP;
Abstract
Provided is a method for peeling a PSA sheet adhered on a polarizing plate. The PSA sheet has a PSA layer. The PSA layer includes a layer A forming at least one surface of the PSA layer. Of the polarizing plate, the surface to which the PSA sheet is adhered is corona-treated or plasma-treated. The peeling method includes a water-peel step in which the PSA sheet is peeled from the polarizing plate, in a state where an aqueous liquid exits at the interface between the polarizing plate and the PSA sheet at the front line of peeling the PSA sheet from the polarizing plate, with the aqueous liquid allowed to further enter the interface following the movement of the peel front line.