| US 7,591,058 B2 | ||
| Nonwoven amorphous fibrous webs and methods for making them | ||
| Michael R. Berrigan, Oakdale, Minn. (US); Anne N. De Rovere, Woodbury, Minn. (US); William T. Fay, Woodbury, Minn. (US); Jerald W. Hall, Jr., Maplewood, Minn. (US); and Pamela A. Percha, Woodbury, Minn. (US) | ||
| Assigned to 3M Innovative Properties Company, St. Paul, Minn. (US) | ||
| Filed on Jun. 14, 2007, as Appl. No. 11/762,942. | ||
| Application 11/762942 is a division of application No. 10/151780, filed on May 20, 2002, granted, now 7,279,440. | ||
| Prior Publication US 2007/0234551 A1, Oct. 11, 2007 | ||
| Int. Cl. B23P 17/00 (2006.01); D04H 1/00 (2006.01) | ||
| U.S. Cl. 29—419.1 [442/409] | 20 Claims |
| 1. A method of making a nonwoven fibrous web, the method comprising:
providing a plurality of amorphous polymeric fibers in which amorphous polymer molecular chains are aligned lengthwise of
the fibers and the fibers are of uniform diameter along their length; and
autogeneously bonding the plurality of amorphous polymeric fibers within the web, wherein the autogeneously bonded amorphous
polymeric fibers retain a fibrous shape after bonding.
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