The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2014
Filed:
Nov. 20, 2012
Applicant:
Freudenberg Nonwovens, L.p., Durham, NC (US);
Inventors:
Eberhard Link, Raleigh, NC (US);
James Frasch, Hollis, NH (US);
Assignee:
Freudenberg Nonwovens, L.P., Durham, NC (US);
Primary Examiner:
Int. Cl.
CPC ...
D04H 1/46 (2012.01); D04H 1/42 (2012.01); D04H 13/00 (2006.01);
U.S. Cl.
CPC ...
D04H 1/46 (2013.01); D04H 13/003 (2013.01); D04H 1/42 (2013.01);
Abstract
A fire blocking non-woven textile containing a first carded web of char-forming fibers containing aramid or melamine/formaldehyde fiber and a second carded web of oxygen-depleting fibers comprising a blend of polyacrylonitrile copolymer with a halogen comonomer and a polyester polymer. The webs may be needled-punched or thermally bonded and remain as separate layers separating the action of the char forming and oxygen depleting layers to optimize char strength, provide a light weight product, which may satisfy 16 CFR 1633 at thicknesses of up to 3.0 mm.