Latent contractable elastomers, composite yarns therefrom and methods of formation and use
First Claim
1. A latent contractable melt extruded segmented, inherently elastic polyester-polyester or polyester-polyether thermoplastic polymer filament characterized by containing interspersed relatively hard segments and relatively soft segments, which contracts at least 15% in length when subjected to an elevated temperature, as compared to the length of the melt extruded filament without deliberate drawing prior to contraction to yield an elastic filament.
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Abstract
This invention relates to melt extruded latent contractable elastic filaments which are formed by melt extruding certain segmented crosslinked thermoplastic polymers to form filaments, which filaments, when heat processed at elevated temperatures, significantly contract to yield an elastic filament. This invention also relates to the formation of composite covered yarn comprising said latent contractable melt extruded filaments. In addition, this invention relates to processes for forming articles from said latent contractable filaments or covered yarns comprising said contractable filaments and subsequently contracting said yarns to form an elastic article.
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Citations
14 Claims
- 1. A latent contractable melt extruded segmented, inherently elastic polyester-polyester or polyester-polyether thermoplastic polymer filament characterized by containing interspersed relatively hard segments and relatively soft segments, which contracts at least 15% in length when subjected to an elevated temperature, as compared to the length of the melt extruded filament without deliberate drawing prior to contraction to yield an elastic filament.
Specification