Mold-in touch fastening product
View Patent ↗A male touch fastener strip includes an elongated base and a field of male fastener elements each having a stem extending from a broad face of the base and a head for engaging fibers. The fastener element stems and broad face of the base together form a unitary mass of resin, such as a resin containing a magnetically attractable substance. Wings extend from respective longitudinal edges of the base and define discrete corrugations extending in a series along the fastener strip and forming corresponding undulations in the rear face of the strip along its longitudinal edges. The corrugated wings can also support a foam gasket.
1. A male touch fastener strip having a front fastening face and a rear face, the strip comprising:
an elongated base of a material comprising a magnetically attractable substance dispersed throughout a synthetic resin; and
a field of exposed male fastener elements each having a stem extending from the base on the front fastening face of the strip;
wherein the base has an areal heat capacity of between about 15 and 65 milli-Joules per square centimeter degree C.
2. The touch fastener strip of claim 1 , wherein the magnetically attractable substance comprises between about 30 and 40 percent of the material, by weight.
3. The touch fastener strip of claim 1 , wherein the areal heat capacity is between about 45 and 65 milli-Joules per square centimeter degree C.
4. The touch fastener strip of claim 1 , wherein the magnetically attractable substance is in a form of discrete particles of the substance dispersed throughout the synthetic resin.
5. The touch fastener strip of claim 1 , further comprising a pair of wings, each wing extending from a respective longitudinal edge of the base and angled, in an unloaded state, toward the rear face of the strip.
6. The touch fastener strip of claim 5 , further comprising longitudinal walls rising from the base on either side of the field of male fastener elements and inboard of the wings.
7. The touch fastener strip of claim 5 , wherein each wing defines discrete corrugations extending in a series along the fastener strip and forming corresponding undulations in the rear face of the strip along longitudinal edges of the fastener strip.
8. The touch fastener strip of claim 7 , wherein the corrugations define a corrugation amplitude, at outer edges of the wings, of at least twice a nominal edge thickness of the wings.
9. The touch fastener strip of claim 7 , wherein the corrugations feature a saw tooth profile at outboard edges of the wings.
10. The touch fastener strip of claim 7 , wherein each wing carries a respective strip of foam adhered to the wing on a same side of the fastener strip as the fastener elements.
11. The touch fastener strip of claim 10 , wherein the strips of foam overlay the corrugations.