PRESSURE-SENSITIVE ADHESIVE LAYER FOR OPTICAL FILM, PRESSURE-SENSITIVE ADHESIVE TYPE OPTICAL FILM, AND IMAGE DISPLAY DEVICE

摘要

Disclosed is a pressure-sensitive adhesive layer for optical films which is formed by applying an aqueous dispersion type pressure-sensitive adhesive comprising an aqueous dispersion that comprises water and, dispersed therein, a polymer obtained by polymerizing a monomer in the presence of a surfactant and a free-radical polymerization initiator, and then drying the applied adhesive. The amount of the surfactant is 0.3-5 parts by weight per 100 parts by weight of the monomer. When the pressure-sensitive adhesive layer is allowed to stand in water at 23ºC for one week and to separate into water-insoluble components and water-soluble components, then the amount of the water-insoluble components is 95-99 wt.% of the pressure-sensitive adhesive layer and the amount of the surfactant contained in the water-soluble components is not more than 50 wt.% of the water-soluble components. The pressure-sensitive adhesive layer for optical films has high durability whereby the adhesive layer can be inhibited from foaming or peeling off even in a high-temperature high-humidity environment.