Patent ID: 6289841
Filing Date: 2001-09-18
Classification: A61L,B05C,C08J,C14C,D04H,D06B,D06M,D06N,D21H,Y10S,Y10T

Abstract:
System for controlling the placement of a shear-thinnable polymer composition into a porous web, having a three dimensional structure of a plurality of structural elements with interstitial spaces therebetween, comprising:means for pretreating and impregnating the porous web with a fluorochemical;means for applying tension to the porous web;means for applying a curable, shear-thinnable, polymer composition onto one surface of the tensioned web; andmeans for shear thinning the polymer composition to substantially reduce its viscosity and selectively place it into the tensioned web to encapsulate at least some of the structural elements of the porous web by enveloping exposed surface portions of the structural elements.