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:
Jul. 05, 1988
Filed:
May. 14, 1986
Applicant:
Inventors:
Martin H Deeg, Maplewood, NJ (US);
Norman J Bond, Matthews, NC (US);
Assignee:
Hoechst Celanese Corporation, Somerville, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01F / ; D01F / ;
U.S. Cl.
CPC ...
264103 ; 264168 ; 2642104 ; 2642105 ; 2642108 ; 26421115 ; 26421117 ; 264234 ; 264237 ; 264345 ; 264348 ; 525444 ;
Abstract
A process is provided wherein a polymer blend of a poly(butylene terephthalate) and about 5 to 25% by weight of poly(ethylene terephthalate) is melt spun to form a fiber or yarn which is then drawn at an elevated temperature resulting in the poly(butylene terephthalate) having a stable beta crystal form in relaxed condition. The fiber or yarn may then be subjected to a heat relaxation treatment which changes the crystal form of the poly(butylene terephthalate) from the beta to the alpha form resulting in some shrinkage of the fiber or yarn and causing it to have a greater degree of stretchability.