COMPOSITIONS OF POLYPROPYLENE AND ETHYLENE/ALPHA-OLEFIN COPOLYMERS AND THEIR USE IN THE MANUFACTURE OF STRETCHED FILAMENTS

摘要

A combination of at least one propylene polymer and at least one ethylene/ alpha -olefin copolymer wherein the combination comprises: (a) 10 to 40 weight percent isotactic polypropylene; and (b) 60 to 90 weight percent ethylene/ alpha -olefin copolymer, wherein said alpha -olefin has at least 4 carbon atoms, and wherein said copolymer has a density between 0.905 and 0.940 g/cm3 and a melt index between 0.2 and 3 dg/min. Application to the manufacture of mono-oriented yarns.