A female member of a mechanical fastener includes a fibrous layer and a plurality of strips. A plurality of ridges are intermittently shaped from a bottom side toward a top side of the fibrous layer. A plurality of strips are bonded to the bottom side of the fibrous layer so as to be spaced one from...http://www.google.es/patents/US6146738?utm_source=gb-gplus-sharePatente US6146738 - Female member of mechanical fastener
