Patent ID: 7072112
Filing Date: 2006-07-04
Classification: B29C,B29D,B29K

Abstract:
1. A polarizing filter comprising: a polarized film having a first surface and a second surface in a side opposite to said first surface; a first protective film having a rigidity less than 320 kPa·m and being curled with a degree of curl more than 10 mm so as to form a concave surface and a convex surface; wherein said degree of curl is an averaged height of four corners of a curling test film tip from a horizontal stage when said curling test film tip is settled on said horizontal stage in atmosphere at 25° C. and 65% RH for a predetermined time so as to curl upwards, and said curling test film is obtained by cutting said protective film to have a size 305 mm×254 mm, a second protective film whose rigidity is more than 320 kPa·m, said second protective film being adhered to said second surface of said polarized film, and an adhesive agent applied to said concave surface of said first protective film, said adhesive agent adhering said protective film to said polarized film.