Importance

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Abstract

Improved yarns the properties of which can be altered by heat treatment for various products are disclosed, as well as product made therewith and processes thereof. The yarns of the invention comprise a multifilamentary core of a comparatively lower melting point material, such as polypropylene or polyethylene, which is wrapped in both S and Z directions (that is, both clockwise and counterclockwise) by multifilamentary strands of a higher melting point material, such as polyester. For providing cut and abrasion resistance to webbing and products made therefrom, such as cargo lifting slings and the like, on the order of 8-12 such yarns are woven into the edges of webbing material, such that they contact one another. Upon heat treatment, the material of the multifilamentary core melts to the extent that it wicks into and “wets out” the material of the multifilamentary wrappers; upon cooling, the filaments of the wrapper are disposed in a solidified matrix of the core material, forming a comparatively hard, tough material, and the adjacent yarns are bonded to one another to some degree.

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First Claim