Patent ID: 7780903
Filing Date: 2010-08-24
Classification: D01D,D01F,D04H,Y10T

Abstract:
1. A method of making thermoplastic polymer fibers, the method comprising: a) providing a thermoplastic polymer material that exhibits a slow crystallization rate; b) forming a plurality of molten polymer fibers from said thermoplastic polymer material; c) subjecting said molten polymer fibers immediately upon extrusion to anneal-quenching at an anneal-quench temperature that is at least 10° C. greater than the glass transition temperature (Tg) of said thermoplastic polymer material but less than a melting temperature thereof, and which approximates a prime temperature at which can achieve an amount of crystallinity in the thermoplastic polymer material of about 45% or greater as determined by differential scanning calorimetry (DSC).