Patent ID: 8399086

Claim:
A mold-in fastening member which comprises a strip of substrate, engaging elements formed on one surface of the substrate, and an elastomer layer completely surrounding the engaging elements of the fastening member, the substrate having slits or notches which extend from a widthwise central portion of the substrate to a widthwise end portion of the substrate, wherein the fastening member having independent engaging elements on its surface is produced by melt-extruding a thermoplastic resin into a tape form from a nozzle having a predetermined slit having a shape corresponding to the lengthwise cross section of each of the substrate and the engaging elements, thereby forming a tape having ridges of the engaging elements which are continuous in the lengthwise direction of the tape on the surface of the substrate; slitting down the continuously projecting ridges of the engaging elements formed on the surface at small intervals; and then stretching the tape in the lengthwise direction, wherein the thermoplastic resin comprises a mixture of at least one non-elastomer resin and at least one elastomer resin and the elastomer resin is added in an amount of 2 to 30% by weight of the non-elastomer resin.