Polypropylene fibers and fabrics

This invention relates to polypropylene fibers and fabrics containing polypropylene fibers, the fibers comprising propylene polymers comprising at least 50 mol% propylene, said polymeis having: a) a melt flow rate (MFR, ASTM 1238, 230 DEG C, 2.16kg) of about 10 dg/min to about 25 dg/min; b) a dimens...

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Bibliographische Detailangaben
Hauptverfasser:	SARRAZIN JEROME, MITCHELL CYNTHIA ANN, KULKARNI RAHUL RAVINDRA, MACDONALD JEANNE MARIE, THURMAN DEREK WADE, GEUS HANS-GEORG, FREY DETLEF, CINQUEMANI CLAUDIO, SCHLAG PETER, DOUFAS ANTONIOS K, FERRY WILLIAM MICHAEL
Format:	Patent
Sprache:	eng
Schlagworte:	BRAIDING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL METALLURGY NON-WOVEN FABRICS ORGANIC MACROMOLECULAR COMPOUNDS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	This invention relates to polypropylene fibers and fabrics containing polypropylene fibers, the fibers comprising propylene polymers comprising at least 50 mol% propylene, said polymeis having: a) a melt flow rate (MFR, ASTM 1238, 230 DEG C, 2.16kg) of about 10 dg/min to about 25 dg/min; b) a dimensionless Stress Ratio / Loss Tangent Index R2 [defined by Eq. (8)] at 190 DEG C from about 1.5 to about 30; c) an onset temperature of crystallization under flow, Tc rheoi (as determined by SAOS rheology, 190 DEG C, 1 DEG C/min, where said polymer has 0 wt% nucleating agent present), of at least about 123 DEG C; d) an average meso run length determined by 13C NMR of at least about 55 or higher; and e) optionally, a loss tangent, tan6, [defined by Eq. (2)] at an angular frequency of 0.1 rad/s at 190 DEG C from about 14 to about 70.