Patent ID: 11970644
Assignee: NITTO DENKO CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B  G  Y | IPC B  C

Claim 0:
1. A method for peeling a pressure-sensitive adhesive sheet adhered on a polarizing plate, wherein
the pressure-sensitive adhesive sheet has a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer includes a layer A forming at least a polarizing plate side surface of the pressure-sensitive adhesive layer;
the polarizing plate has a surface to which the pressure-sensitive adhesive sheet is adhered and corona-treated or plasma-treated;
the peeling method includes a water-peel step in which the pressure-sensitive adhesive sheet is peeled from the polarizing plate, in a state where an aqueous liquid exits at an interface between the polarizing plate and the pressure-sensitive adhesive sheet at a front line of peeling the pressure-sensitive adhesive sheet from the polarizing plate, with the aqueous liquid allowed to further enter the interface following the movement of the peel front line, and
the polarizing plate has a structure in which a polarizing film is placed between two sheets of triacetyl cellulose film, and the pressure-sensitive adhesive sheet is peeled from at least one surface of the triacetyl cellulose film that forms an outer surface of the polarizing plate in the water-peel step.