Exxonmobil Chemical Patents Inc.

Reifenhauser Gmbh & Co Kg Maschinenfabrik

Jindal Films Americas LLC

Jerome Sarrazin

Antonios K Doufas

Derek Wade Thurman

Cynthia Ann Mitchell

Jeanne Marie MacDonald

William Michael Ferry

Detlef Frey

Hans-Georg Geus

Charles James Ruff

Claudio Cinquemani

Peter Schlag

Rahul Ravindra Kulkarni

Etienne R H Lernoux

Rahul Rameshrao Kulkarni

William Michael Farry

Rahul Ravindra Kulkami

Cynthia A Mitchell

Etienne Rene Henri Lernoux

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&#xb0; 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&#xb0; C. from about 1.5 to about 30; c) an onset temperature of crystallization under flow, T, (as determined by SAOS rheology, 190&#xb0; C., 1&#xb0; C./min, where said polymer has 0 wt % nucleating agent present), of at least about 123&#xb0; C.; d) an average meso run length determined byC NMR of at least about 55 or higher; and e) optionally, a loss tangent, tan &#x3b4;, [defined by Eq. (2)] at an angular frequency of 0.1 rad/s at 190&#xb0; C. from about 14 to about 70.

Polypropylene fibers and fabrics

This invention relates in one aspect to propylene polymers comprising propylene, said polymers having a melt flow rate (MFR, ASTM 1238, 230&#xb0; C., 2.16 kg) of 10 dg/min to 25 dg/min; a Dimensionless Stress Ratio/Loss Tangent Index Rat 190&#xb0; C. from 1.5 to 28; an average meso run length determined byC NMR of at least 70 or higher; and an MFR MFR Ratio of at least 1.0 and optionally, a Loss Tangent, tan &#x3b4;, at an angular frequency of 0.1 rad/s at 190&#xb0; C. from 14 to 100. The inventive propylene polymer compositions are useful in in molded articles and non-woven fibers and fabrics.

Propylene polymers

This invention relates to propylene polymers comprising at least 50 mol % propylene, said polymers having: a) a melt flow rate (MFR, ASTM 1238, 230&#xb0; C., 2.16 kg) of 10 dg/min to 25 dg/min; b) a Dimensionless Stress Ratio/Loss Tangent Index Rat 190&#xb0; C. from 1.5 to 28; c) an onset temperature of crystallization under flow, T(as determined by SAOS rheology, 190&#xb0; C., 1&#xb0; C./min, where said polymer has 0 wt % nucleating agent present), of at least 131&#xb0; C.; d) an average meso run length determined byC NMR of at least 90 or higher; and e) optionally, a loss tangent, tan &#x3b4;, (defined by Eq. (2)) at an angular frequency of 0.1 rad/s at 190&#xb0; C. from 14 to 70.

A multi-layer film including a cavitated core layer, two skin layers and at least one tie layer between the core layer and one of the skin layers, said tie layer including from about 1 to about 25 wt % of a soft polymer having a density in the range of 0.850 g/cmto 0.920 g/cmand a Differential Scanning Calorimetry (DSC) melting point in the range of 40&#xb0; C. to 125&#xb0; C., said multi-layer film having a density between 0.50 to 0.85 g/cm.

Multi-layer opaque films, articles including such films, and uses thereof

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Sint Stevens Woluwe, Belgium

Jerome Sarrazin