Patent ID: 6024813
Filing Date: 2000-02-15
Classification: A62D,B01D,B01J,B32B,D04H,D21H,Y10T

Abstract:
A process for making a fibrous structure comprising the steps of(a) dry forming on a fibrous support structure, an open first fibrous web comprising composite fibers comprising a structural component and a lower melting component;(b) thereafter dispersing adsorptive particles into, and entrapping said adsorptive particles within, said first fibrous web;(c) thereafter dry forming on said first fibrous web, a second fibrous web likewise comprising composite fibers comprising a structural component and a lower melting component;(d) thereafter dispersing functional particles into said second fibrous web;(e) thereafter heating the structure of steps (a)-(d) prior to any application of pressure to said first fibrous web and said second fibrous web, whereby said lower melting component of said composite fibers provides for fusion of said adsorptive particles to said first fibrous web and of said functional particles to said second fibrous web, and for fiber-fiber bonding in said first fibrous web and said second fibrous web at fiber cross-over points, and for bonding of said first fibrous web to said second fibrous web and to said fibrous support structure; and(f) thereafter compressing the structure of step (e); wherein the dry-forming is selected from carding and air-laying.