Patent ID: 8541056

Claim:
A method of making a fiber-containing substrate comprising the sequential steps of: (a) providing a fiber-containing substrate, said substrate having a first surface and a second surface; (b) face-finishing at least said first surface of said substrate by exposing said first surface to one or more abrasive surfaces coated with diamond grit having an average grit size of between about 600 and about 1200, thereby forming integral microscopic surface structures upon said first surface, wherein (i) said integral microscopic surface structures have projections substantially normal to the plane of said fiber-containing substrate; and (ii) said at least first surface is comprised of portions having a plurality of substantially unbroken fibers comprising surface structures along at least part of the length of said fibers, and wherein said fibers have a Roughness Factor greater than or equal to about 1.10; and (c) applying a chemical mixture to at least said first surface of said substrate, said chemical mixture comprising a repellent component.