Pressure sensitive adhesive optical film and image viewing display

Abstract

A pressure sensitive adhesive optical film that has good reworkability, and further has excellent moisture heat resistance, and that gives neither foaming nor peeling under heated and humidified treatment is provided. A pressure sensitive adhesive optical film with a pressure sensitive adhesive layer laminated on at least one surface of an optical film, wherein a P0 gives a value of no more than 5 N/25 mm, (where the pressure sensitive adhesive layer is attached on a glass plate, it is given an autoclave processing under a condition of 50° C.×5 atm×15 minutes, it is left under 23° C. ambient atmosphere for 30 minutes, and subsequently, the P0 of initial 90° peel strength at 23° C. and by a peeling speed of 300 mm/minute is determined), and a ratio (P1/P0) of a P1 to a P0 is no less than 2 (where after the pressure sensitive adhesive layer is given the above-mentioned autoclave processing, it is furthermore given a heat-treatment at 80° C. for 2 hours, subsequently, it is left in 23° C. ambient atmosphere for 30 minutes, and the P1 of 90° peel strength after heating by a peeling speed of 300 mm/minute and at 23° C. is determined).

Dependencies are inferred from the claim text.