US 7,520,912 B2
	Air purifying filter media and process for producing the same
Nobuyuki Sakadume, Nagaoka (Japan); Toshihiko Soyama, Nagaoka (Japan); Eiko Meguro, Nagaoka (Japan); Kazuro Isomae, Tokyo (Japan); and Mikiko Gokano, Tokyo (Japan)
Assigned to Hokuetsu Paper Mills, Ltd., Nagaoka-shi (Japan); and Nikki-Universal Co., Ltd., Tokyo (Japan)
Appl. No. 10/506,520 PCT Filed Oct. 16, 2002, PCT No. PCT/JP02/10765 § 371(c)(1), (2), (4) Date Jan. 31, 2005, PCT Pub. No. WO2004/035173, PCT Pub. Date Apr. 29, 2004.
Prior Publication US 2006/0117958 A1, Jun. 08, 2006
Int. Cl. B01D 45/00 (2006.01); A61L 9/00 (2006.01); C12N 11/14 (2006.01)

U.S. Cl. 55—524  [55/527; 95/285; 96/226; 422/4; 422/28; 435/176; 435/177; 435/181]

59 Claims

1. An air purifying filter media having a dry tensile strength, a wet tensile strength in association with water resistance and water repellency and exhibiting bactericidal/sterilizing or antimicrobial means properties using enzyme reaction, obtained by applying a mixture of the modified enzyme which has an ionic polarity opposite to the ionic polarity of the whole filter media fiber having a functional group and which has sterilizing properties, and an ionic synthetic resin binder having the opposite ionic polarity similar to the modified enzyme, to the whole filter media fiber as described above.