US Patent 7282251 Loop materials for touch fastening

Loop materials are provided for touch fastening. The loop materials include a web of nonwoven fibrous material defining a plane, the web including: (a) raised areas, elevated above the plane of the web, defining loops constructed for engagement with male touch fastener elements; (b) rib areas surrounding the raised areas to anchor the loops; and (c) between the rib areas, either open areas, or planar areas that are substantially in the plane of the web.