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:
Apr. 26, 2016
Filed:
Dec. 03, 2012
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Reifenhäuser Gmbh & Co. KG Maschinenfabrik, Troisdorf, DE;
Jeanne Marie MacDonald, Sugar Land, TX (US);
Antonios K. Doufas, Baytown, TX (US);
Jerome Sarrazin, Sint Stevens Woluwe, BE;
William Michael Ferry, Houston, TX (US);
Rahul Ravindra Kulkarni, Houston, TX (US);
Derek Wade Thurman, Houston, TX (US);
Cynthia Ann Mitchell, Houston, TX (US);
Detlef Frey, Niederkassl, DE;
Peter Schlag, Troisdorf, DE;
Hans-Georg Geus, Niederkassel, DE;
Claudio Cinquemani, Köln, DE;
EXXONMOBIL CHEMICAL PATENTS INC., Baytown, TX (US);
REIFENHAUSER GMBH & CO. KG MASCHINENFABRIK, Troisdorf, DE;
Abstract
This invention relates to polypropylene fibers and fabrics containing polypropylene fibers, the fibers comprising propylene polymers comprising at least 50 mol % propylene, said polymers having: a) a melt flow rate (MFR, ASTM 1238, 230° C., 2.16 kg) of about 10 dg/min to about 25 dg/min; b) a dimensionless Stress Ratio/Loss Tangent Index R[defined by Eq. (8)] at 190° C. from about 1.5 to about 30; c) an onset temperature of crystallization under flow, T, (as determined by SAOS rheology, 190° C., 1° C./min, where said polymer has 0 wt % nucleating agent present), of at least about 123° C.; d) an average meso run length determined byC NMR of at least about 55 or higher; and e) optionally, a loss tangent, tan δ, [defined by Eq. (2)] at an angular frequency of 0.1 rad/s at 190° C. from about 14 to about 70.