POLYOLEFIN COMPOSITION COMPRISING PROPYLENE HOMOPOLYMER OF LOW VISCOSITY, FIBER AND ELASTIC NONWOVEN MATERIAL PREPARING FROM THEREOF Russian patent published in 2006 - IPC C08L23/12 D01F6/46 D04H1/00 

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to polyolefin composition comprising crystalline propylene homopolymer showing the high melt flow rate and to a fiber and nonwoven material preparing from its. Polyolefin composition comprises from 5 to 45 wt.-% of propylene homopolymer of low viscosity showing the melt flow rate value from 250 to 550 g/10 min measured according to D-1238, the condition L (230°C/2.16 kg) after polymerization immediately, and from 55 to 95 wt.-% of olefin polymeric composition being preferably statistic copolymer of propylene and ethylene and/or (C₄-C₁₀)-alpha-olefin, or their mixtures with the content of propylene in the range from 90 to 99 wt.-%. Fiber of diameter from 15 to 23 microns can be shaped from the composition. Fibers can be used in making nonwoven materials. Nonwoven materials prepared from this polyolefin composition show the desirable combination of acceptable strength limit value in stretching, the excellent relative elongation value in transverse direction, good processing capacity and improved softness and draping capacity.

EFFECT: improved and valuable properties of composition and materials.

20 cl, 4 tbl, 2 ex