High tenacity propylene polymer fiber and process for making it

Details High tenacity propylene polymer fiber and process for making it High tenacity propylene polymer fiber and process for making it

D - Textiles, Paper

01

F

D01F 6/06 (2006.01) C08L 23/10 (2006.01) D01F 6/04 (2006.01) D01F 6/46 (2006.01)

Patent

CA 2176522

Process for the production of a high tenacity propylene polymer fiber which comprises: - spinning fiber from a molten propylene polymer composition consisting essentially of an olefin polymer (I) and a high molecular weight propylene polymer (II) having a branching index less than 1 and melt strength from 5 to 40 cN; said propylene polymer (II) being present in a concentration from 0.1 to 10% by weight with respect to the total weight of the composition; and - drawing the solid fiber thus obtained with a draw ratio greater than 4.5 when the spinning step is continuous and greater than 5 when the spinning step is discontinuous.

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