PROCESS FOR MAKING A SHEET OF ARARMID FIBERS USING A FOAMED MEDIUM

摘要

The present invention relates to a method for forming a non-woven fibrous web comprised of aramid fibers and aramid fibrid which comprises forming a foam furnish by agitating the fibers and fibrid in a foamed medium, and passing the foam furnish onto a screen and defoaming the furnish. In effectively agitating the aramid fibers in the foamed medium, the agitating means (18) is mounted for displacement within the foamed medium and includes a convex leading surface (26) facing in the direction of displacement. The leading surface includes upper and lower portions converging in the direction of displacement to form a generally convex leading surface and driving means (22) for displacing the agitating means (18) in the direction of displacement for dispersing and mutually separating the aramid fibers within the foamed medium.