Patent ID: 7488524
Filing Date: 2009-02-10
Classification: B01J,B32B,Y10S,Y10T

Abstract:
1. A high-durability photocatalyst film which is a laminated film having (A) an acrylic resin film or a polyethylene terephthalate film which is surface-coated with a crosslinking acrylic resin containing an anti-weathering agent as a substrate film, (B) a protective layer formed on one surface thereof and (C) a photocatalytically active material layer formed thereon and having photocatalytic functions, which uses, as said substrate film (A), a film (1) having a total light transmittance of 85% or more, a haze of 5% or less and a yellow index (YI) of 10 or less after a 3,000 hours' accelerated weather resistance test of the film having a thickness of 50 μm with a carbon arc type sunshine weatherometer (irradiance level 225 W/m and which uses, as said protective layer (B), an organic-inorganic composite graded film having an organic polymer component on the substrate film side and a metal oxide compound component on the opposite side and having contents of the two components which contents continuously change in the thickness direction, said laminated film having a total light transmittance of 85% or more, a haze of 5% or less, a yellow index (YI) of 10 or less and a water contact angle of 10° or less after a 3,000 hours' accelerated weather resistance test with a carbon arc type sunshine weatherometer (irradiance level 225 W/m