Reclosable mechanical fastener based on a composite article

A fastening component of a reclosable mechanical fastener, which fastening component comprises:

• (a) a substrate, and
• (b) a fastening layer having a first major surface and a second major surface, said first major surface being adhered to said substrate, said second major surface being non-tacky, substantially flat, and comprising a crosslinked polymer formed from radiation-curable, addition-polymerizable, oligomers or prepolymers having one or more like or different hard segments of mono- or poly-valent moieties containing one or more carbocyclic or heterocyclic groups or both said moieties, wherein each of said moieties of said hard segments, when their valences are satisfied by protons, has at least one major transition temperature above 250.degree. K., one or more like or different soft segments of mono- or poly-valent moieties, wherein each of said moieties of said soft segments has a number average molecular weight in the range of about 500 to 5000 and each of which in the form of homopolymer has a glass transition temperature below 250.degree. K., one or more like or different monovalent moieties containing a radiation-sensitive, addition-polymerizable, functional group selected from the group consisting of acrylyl, methacrylyl, allyl, and vic-epoxy, said second major surface capable of releasably adhering to an identical second major surface of a second fastening layer.