Non-woven material with barrier skin

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(12) United States Patent

Wenstrup et al.

(io) Patent No.: (45) Date of Patent:

US 7,696,112 B2 *Apr. 13, 2010

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(Continued)

FOREIGN PATENT DOCUMENTS

DE 202 03 427 4/2003

(Continued)

OTHER PUBLICATIONS

Additives—Reinforcing Polypropylene with Natural Fibers. Plastics Engineering / Apr. 1994. AnandR. Sanadi—Department of Forestry, University of Wisconsin, Madison, Wisconsin. Daniel F. Caulfield and Roger M. Rowell, Forest Products Laboratory—U.S. Department of Agriculture, Madison, Wisconsin.

(Continued)

Primary Examiner—Jenna-Leigh Johnson

(74) Attorney, Agent, or Firm—Cheryl J. Brickey

A non-woven material including first effect fibers, first binder fibers, second binder fibers, and second effect fibers. The non-woven material has a first planar zone and a second planar zone. The first planar zone includes a greater concentration of first effect fibers and first binder fibers. The second planar zone includes a greater concentration of second effect fibers and second binder fibers. The first planar zone can include a first surface skin associated with the first planar zone on the exterior of the non-woven material, and a second surface skin associated with the second planar zone on the exterior of the non-woven material.

9 Claims, 2 Drawing Sheets

Page 2

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