Back to results
US 6,830,656 B2Granted
Non-woven fiber webs with nylon binder
AssigneeFiberMark, Inc.
InventorHoman B. Kinsley, Jr.
Life of this patent
Estimating the term…
Abstract
The present invention relates to a nonwoven web comprised of metal or refractory fibers with nylon as a binder. The nonwoven web is prepared by forming a foam furnish by agitating the fibers in a foamed medium, and passing the foam furnish onto a screen and defoaming the furnish. It is preferred that the nylon binder is added to the foam furnish in the form of fibers. Once the furnish is defoamed to form a nonwoven web, the sheet is dried at a temperature sufficient to melt the nylon binder.
Claims7
A method for forming a nonwoven fibrous web comprised of metal or refractory fibers with nylon as a binder, which comprises:
- (i) forming a foam furnish by agitating metal or refractory fibers in a foamed medium with an apparatus comprising agitation means mounted for displacement within the foamed medium, said agitating means comprising a leading surface facing in a direction of displacement, the leading surface including upper and lower portions converging in the direction of displacement to form a generally convex leading surface, and said agitating means also comprising a non-convex trailing surface facing away from the direction of displacement;
- and driving means for displacing the agitating means in the direction of displacement for dispersing and separating the fibers within the foamed medium;
- and
- (ii) passing the foam furnish onto a screen and defoaming the furnish to form a nonwoven web;
- and
- (iii) drying the formed web at a temperature sufficient to melt the nylon contained in the web.
3 more elements
Dependencies are inferred from the claim text.