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Method of Making a Mechanical Fastening Strip and Reticulated Mechanical Fastening Strip Therefrom:

U.S. Patent No. 10,456,303

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By: Karen McIntyre

Editor, Nonwovens Industry

Leigh E. Wood, Woodbury, MN; Thomas J. Gilbert, St. Paul, MN; Mark A. Peltier, Forest Lake, MN; Peter Kitzer, Echt, Netherlands; Volker Hauschildt, Hilden, Germany; Andreas Urban, Cologne, Germany; William C. Unruh, Inver Grove Heights, MN; and Kristopher K. Biegler, Minneapolis, MN.
Assigned to 3M Innovative Properties Company, St. Paul, MN.

Filed: 9/21/15
Issued: 10/29/19

A method of making a mechanical fastening strip, the method comprising: providing a thermoplastic backing having multiple rows of upstanding posts; slitting through the thermoplastic backing to provide a slit backing having interrupted slits between at least some pairs of adjacent rows of the upstanding posts, wherein each interrupted slit is interrupted by at least one intact bridging region of the slit backing, and wherein the interrupted slits do not slit the upstanding posts; spreading the slit backing to provide multiple strands of the thermoplastic backing attached to each other at least at some of the bridging regions and separated from each other between at least some of the bridging regions to provide at least one opening; and fixing the multiple strands of the thermoplastic backing in a spread configuration to maintain the at least one opening between the multiple strands of the thermoplastic backing.

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