Patent ID: 6491883
Filing Date: 2002-12-10
Classification: B01D,Y10T

Abstract:
An air-cleaning photocatalytic filter comprising:a base material, and a coating layer formed on a surface of the base material, comprising 5 to 60% by weight of ultraviolet ray-transmissible solid particles having a minor axis of the particles in the range of from 0.2 to 50 &mgr;m, 20 to 80% by weight of photocatalytic solid particles having an average particle size of 0.001 to 0.02 &mgr;m and 10 to 60% by weight of fine silica particles having an average particle size of 0.002 to 0.2 &mgr;m, and having a thickness of 5 to 6.0 &mgr;m wherein at least a portion of the ultraviolet ray-transmissible solid particles located in the surface portion of the coating layer is exposed to the outside of the photocatalytic filter.