초록 ▼

A mushroom-type hook strip that can be used in a hook-and-loop mechanical fastener. The hook strip includes 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 end

A mushroom-type hook strip that can be used in a hook-and-loop mechanical fastener. The hook strip includes 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.

대표청구항 ▼

A method for making a mushroom-type hook strip employing a mold which has cavities recessed from a continuous surface that are negatives of an array of upstanding stems, said method comprising the steps of a) moving the continuous surface of the mold along a predetermined path, b) continuously injec

A method for making a mushroom-type hook strip employing a mold which has cavities recessed from a continuous surface that are negatives of an array of upstanding stems, said method comprising the steps of a) moving the continuous surface of the mold along a predetermined path, b) continuously injecting a molten, molecularly orientable thermoplastic resin into the cavities in excess of an amount that would fill the cavities, which excess forms a layer of resin overlying the cavities and the continuous surface around the cavities, c) allowing the injected resin to solidify, d) continuously stripping from the mold the solidified resin layer as a web including a backing and an integral array of upstanding stems having tips at ends of the stems opposite the backing, the backing having a major surface adjacent the stems, and an opposite major surface opposite the stems, e) deforming portions of the stems adjacent the tips by contact with a heated surface to produce a circular disc shaped mushroom head having an outer surface at the end of each stem opposite the backing, and f) resiliently deflecting the stems during said deforming step so that after said deforming step the outer surfaces of the heads are disposed at an angle of up to about 45 degrees with respect to the major surface of the backing adjacent the stems.