Patent ID: 7998562
Filing Date: 2011-08-16
Classification: B01J,B05D,D06N,Y10T

Abstract:
1. A photocatalyst sheet comprising: a substrate made of glass fiber; a first fluorocarbon resin layer made of polytetrafluoroethylene (PTFE) coated on said substrate; a second fluorocarbon resin layer made of copolymer of tetrafluoroethylene-hexafluoropropylene (FEP), or copolymer of tetrafluoroethylene-perfluoroalkylvinylether (PFA) coated on said first fluorocarbon resin layer; and a third fluorocarbon resin layer consisting of copolymer of tetrafluoroethylene-hexafluoropropylene (FEP) containing photocatalysts at least of titanium oxide (TiO of which said photocatalysts have the part exposed on said third fluorocarbon resin layer; the ratio of said photocatalysts in said third fluorocarbon resin layer is 10-60 weight %; and the surface of the fluorocarbon resin layer containing said photocatalysts of said photocatalyst sheet is water repellent upon ultraviolet light irradiation, and when said photocatalyst sheets are thermally welded to each other, and if a welded part is peeled off at the rate of 20 mm/min, then the first fluorocarbon resin layer, the second fluorocarbon resin layer and the third fluorocarbon resin layer as a whole layer is completely peeled off from said substrate.