Molded, hook-shaped fastening

摘要

A mold for forming hook-shaped members has hook shaped cavities located at its surface. The cavities have a height of 0.020 in. or less, and contiguous pedestal chambers and crook chambers. The pedestal chamber is shaped to allow the member to return to its original shape as it is pulled out of the cavity before it is completely removed from the cavity. A fastener element of a hook and loop fastener is formed by delivering moldable heated material to such a mold. A method of making surface elements includes delivering moldable resin to the surface of a mold and forcing the resin into cavities at the surface. The mold comprises a series of plates aligned face-to-face. Cut-outs in at least three adjacent plates are aligned to define the cavity. The resin is set in the cavity and removed from the mold. A method of manufacturing plates used to form fastener elements includes applying a photoresist material to at least one side of the plate. The photoresist material is exposed to light. Portions of the photoresist material are removed based on the light exposure. Acid is applied to the plate, dissolving portions of the plate exposed to the acid and creating cut-outs. A hook member has an integrally-formed pedestal and crook. In side profile, the pedestal forms a truncated pyramid. Projections of leading and trailing edges of the pedestal intersect near the top of the hook. At least 40% of the crook projects laterally from the pedestal.