The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2009
Filed:
Dec. 10, 2003
Jing Chung Chang, Boothwyn, PA (US);
Richard Lee Dommel, Lugoff, SC (US);
Ramunas L. Valteris, Seaford, DE (US);
Robert Mamoru Linek, Seaford, DE (US);
Alfred Harold Thompson, Seaford, DE (US);
Nirmal Kumas Agarwal, Columbia, SC (US);
Jing Chung Chang, Boothwyn, PA (US);
Richard Lee Dommel, Lugoff, SC (US);
Ramunas L. Valteris, Seaford, DE (US);
Robert Mamoru Linek, Seaford, DE (US);
Alfred Harold Thompson, Seaford, DE (US);
Nirmal Kumas Agarwal, Columbia, SC (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Improved staple fibers and processes for producing them are provided. The processes are particularly useful for forming staple fibers from poly(trimethylene terephthalate), especially carpet staple fibers. The processes include prewetting undrawn yarns and drawing the fibers under wet and warm conditions, thermo-fixing the texture, and drying at relatively low temperatures. Fibers produced according to the processes disclosed herein have improved properties and reduced brittleness as compared to fibers prepared using conventional processes.