Mushroom-type hook strip for a mechanical fastener
AssigneeMinnesota Mining and Manufacturing Company
InventorsPhilip Miller, William L. Melbye, Susan K. Nestegard, Leigh E. Wood, Marvin D. Lindseth, Dale A. Bychinski
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Abstract
A mushroom-type hook strip that can be used in a hook-and-loop mechanical fastener. The hook strip comprises a homogeneous backing of thermoplastic resin and, integral with the backing, a high density array of hooks including stems projecting from the backing and circular disc shaped heads at the ends of the stems opposite the backing. The large number, small size, and shape of the heads on the hooks allow them to engage the fibers in conventional types of fabrics and non-woven materials that are not normally used as the loop portions of hook and loop fasteners.
Claims12
A mushroom-type hook strip that can be used in a hook-and-loop mechanical fastener, said strip comprising a homogeneous backing of thermoplastic resin and, integral with said backing, a high density array of hooks including stems projecting from the backing and circular disc shaped heads at the ends of the stems opposite the backing, said heads having generally slightly spherically concave end outer surfaces opposite said backing, and inner surfaces adjacent said backing generally parallel to said outer surfaces, said stems having a molecular orientation as evidenced by a birefringence value of at least 0.001.
Dependencies are inferred from the claim text.