Air-cleaning photocatalytic filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 10, 2002
Grant Date -
Aug 16, 2001
app pub date -
Dec 26, 2000
filing date -
Dec 27, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A photocatalytic filter having a coating layer formed in a thickness of 5 to 60 .mu.m on a base material and including 5 to 60% by weight of ultraviolet ray-transmissible particles (such as glass particles or fibers) having a minor axis of 0.2 to 50 .mu.m, 20 to 80% by weight of photocatalytical particles (TiO.sub.2) having an average particle size of 0.001 to 0.02 .mu.m, 10 to 60% by weight of fine silica particles having an average particle size of 0.002 to 0.2 .mu.m and optionally 0.2 to 20% by weight of a clay mineral material, preferably a portion of the ultraviolet ray-transmissible particles being exposed to the outside of the coating layer, exhibits a high air-cleaning activity, a high adhesion of the coating layer to the base material and a high durability in the air-cleaning activity.
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