Building construction felt paper with biocide/anti-microbial...

Details Building construction felt paper with biocide/anti-microbial... Building construction felt paper with biocide/anti-microbial...

2005-03-04

2008-08-12

Ruddock, Ula C (Department: 1794)

Paper making and fiber liberation

Processes and products

C162S161000, C162S189000, C162S231000, C427S359000, C427S361000, C442S123000

Reexamination Certificate

active

07410553

ABSTRACT:
A nonwoven web has a weight sufficient for construction industry use and comprises at least forty percent (40%) recycled waste paper. At least one surface of the web bears a biocide, e.g., has a biocide applied thereto. Preferably the weight of the web is greater than fifteen pounds per thousand square feet (15-lbs/MSF). Preferably the biocide is zinc pyrithione. The web preferably bears at least 50-grams of biocide per thousand square feet per side of said web. One example use of the web is as builders felt, with other uses including as a facer for a laminate board and for asphalt-impregnated webs. The biocide-bearing nonwoven web is specifically directed to use in building construction. One example use of the web is as builders felt, with other uses including as a facer for a laminate board and for asphalt-impregnated webs. Because building construction products must be tough, but priced as low as possible, this web is made largely from recycled waste paper (as opposed to virgin cellulose fiber, as a cost-reducing measure), and optionally clarifier sludge.

REFERENCES:
patent: 6413531 (2002-07-01), King et al.
patent: 6572736 (2003-06-01), Bush et al.
patent: 6734157 (2004-05-01), Radwanski et al.
patent: 2002/0059990 (2002-05-01), Bush et al.
patent: 2002/0062934 (2002-05-01), Bush et al.
patent: 2002/0099125 (2002-07-01), Akkapeddi et al.
patent: 2005/0126430 (2005-06-01), Lightner et al.
patent: 2005/0170721 (2005-08-01), Toas et al.

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