Mushroom-type hook strip for a mechanical fastener

Details Mushroom-type hook strip for a mechanical fastener Mushroom-type hook strip for a mechanical fastener

A - Human Necessities

44

B

A44B 18/00 (2006.01) B29C 59/02 (2006.01) B29C 67/00 (2006.01)

Patent

CA 2090221

2090221 9204839 PCTABS00011 A mushroom-type hook strip for a hook-and-loop fastener has a flexible backing of thermoplastic resin and, integral with backing, an array of upstanding stems distributed across at least one face of the backing, each having a mushroom head. The stems have a molecular orientation as evidenced by a birefringence value of at least 0.001. The mushroom-type hook strip can be produced continuously by injecting resin into cavities of a cylindrical mold while evacuating and cooling the cavities so that the cooled resin becomes molecularly oriented, thus affording to the stems excellent stiffness, durability, and tensible and flexural strength.

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