Polyolefin fibres

摘要

A polyolefin composition comprising:
A) 20-95 wt % of a propylene homo-polymer or a crystalline co-polymer of propylene with ethylene and/or an alpha-olefin having 4-10 carbon atoms, containing 85 wt % or more of propylene, having an isotactic index equal to or higher than 80;B) 5-80 wt % of a copolymer of butene-1 with ethylene and/or an alpha-olefin having 3-10 carbon atoms having:
a content of butene-1 derived units of 80 wt % wt or more,molecular weight distribution Mw/Mn of less than 3flexural modulus of 60 MPa or less.;Fibres and spun bond (woven non woven), disposable sanitary items (e.g. diapers) thereof.

主权项

1. An article comprising:
a polyolefin composition comprising: A) 20-95 wt. % of a propylene homo-polymer or a copolymer of propylene, ethylene and an alpha-olefin having 4-10 carbon atoms containing 85 wt. % or more of propylene, having an isotactic index of at least 80, wherein component A) is homogenous and has a molecular weight distribution ranging from 2 to 8; and B) 5-80 wt. % of a copolymer of butene-1, ethylene and an alpha-olefin having 3-10 carbon atoms having:
(i) a content of butene-1 derived units of at least 80 wt. %,(ii) a molecular weight distribution Mw/Mn of less than 3, and(iii) a flexural modulus no higher than 60 MPa.