METHOD OF STRIPPING OPTICAL FILM OF PRESSURE-SENSITIVE ADHESIVE TYPE AND OPTICAL FILM OF PRESSURE-SENSITIVE ADHESIVE TYPE

摘要

Provided is a method by which a pressure-sensitive adhesive type optical film adherent to a glass substrate is easily stripped from the substrate without damaging the glass substrate and without leaving any adhesive residue on the glass substrate. Also provided is a pressure-sensitive adhesive type optical film which is for use in the method of stripping. The method of stripping a pressure-sensitive adhesive type optical film is for stripping the pressure-sensitive adhesive type optical film from an optical-film-bearing glass substrate, which comprises a glass substrate and a pressure-sensitive adhesive type optical film adherent thereto. The method of stripping a pressure-sensitive adhesive type optical film is characterized in that the pressure-sensitive adhesive type optical film has a pressure-sensitive adhesive layer formed from an aqueous dispersion type pressure-sensitive adhesive. The method is further characterized by exposing the optical-film-bearing glass substrate to an environment having a temperature of 40°C or higher and a relative humidity of 80% or higher or having a temperature of 50°C or higher and a relative humidity of 70% or higher and then stripping the pressure-sensitive adhesive type optical film from the glass substrate.