Patent ID: 6921459
Filing Date: 2005-07-26
Classification: D21F,D21H

Abstract:
1. A method for forming a non-woven fibrous web comprised of aramid fibers, and aramid fibrid, which comprises: (i) forming a foam furnish by agitating aramid fibers in a foamed medium, the furnish also containing aramid fibrid, with an apparatus comprising agitating means mounted for displacement within the foamed medium and including 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 driving means for displacing the agitating means in the direction of displacement for dispersing and mutually separating the fibers within the foamed medium; and (ii) passing the foam furnish onto a screen and defoaming the furnish to form the web.