E.i. Dupont De Nemours and Company

Claudia Schultze

James M Howell

Geoffrey David Hietpas

Ismael A Hernandez

Michelle Hoyt Watkins

James Victor Hartzog

Poly(trimethylene terephthalate) tetrachannel cross-section staple fibers, as well as yarns, fiberfill webs, batts and products, and fabrics made therewith. Also, the process of making such staple fibers, yarns, fiberfill webs, batts and products, and fabrics.

Process for preparing poly(trimethylene terephthalate) tetrachannel cross-section staple fiber

A process of making polytrimethylene terephthalate staple fibers, including (a) providing polytrimethylene terephthalate, (b) melt spinning the melted polytrimethylene terephthalate at a temperature of 245-285&deg; C. into filaments, (c) quenching the filaments, (d) drawing the quenched filaments, (e) crimping the drawn filaments using a mechanical crimper at a crimp level of 8-30 crimps per inch (3-12 crimps/cm), (f) relaxing the crimped filaments at a temperature of 50-120&deg; C., and (g) cutting the relaxed filaments into staple fibers having a length of about 0.2-6 inches (about 0.5-about 15 cm), and polytrimethylene terephthalate staple fibers, yarns and fabrics. Further, a process of optimizing the crimp take-up of a polytrimethylene terephthalate staple fiber including determining the relationship between denier and crimp take-up and manufacturing staple fibers having a denier selected based upon that determination.

Process for making poly(trimethylene terephthalate) staple fibers

Bicomponent fibers with high wicking rate

Poly(trimethylene terephthalate) tetrachannel cross-section staple fiber

Growing community of inventors

Greenville, DE, United States of America

Claudia Schultze