Optical adhesive layer, manufacturing method of optical adhesive layer, optical film with adhesive layer, and image display device

Abstract

The purpose of the present invention is to provide: an optical pressure-sensitive adhesive layer which can suppress the occurrence of foaming, peeling, lifting or the like on an adherend (an optical film) under heating and humidification conditions, and which has high adhesion reliability and excellent durability at high temperatures; a pressure-sensitive adhesive layer attached optical film, having the aforementioned optical pressure-sensitive adhesive layer on at least one surface of the optical film; and further a liquid crystal display device using the aforementioned pressure-sensitive adhesive layer attached optical film. An optical pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition containing a (meth)acrylic polymer, wherein the optical pressure-sensitive adhesive layer has a gel fraction of 70% or more and a creep value of 55 μm or more when a load of 500 g is applied to the optical pressure-sensitive adhesive layer for 1 hour under an environment of 115° C.

Dependencies are inferred from the claim text.