Polyolefin Fibres
AssigneeBasell Poliolefine Italia S.r.l.
InventorsFabio Di Pietro, Roberto De Palo
Life of this patent
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Abstract
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 3 flexural modulus of 60 MPa or less. Fibres and spun bond (woven non woven), disposable sanitary items (e.g. diapers) thereof.
Claims6
A polyolefin composition comprising:
- A) 20-95 wt % of a propylene homo-polymer or a copolymer of propylene with at least one of 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;
- and
- B) 5-80 wt % of a copolymer of butene-1 with at least one of ethylene and an alpha-olefin having 3-10 carbon atoms having:
- a content of butene-1 derived units of at least 80 wt %,
- a molecular weight distribution Mw/Mn of less than 3,
- a flexural modulus no higher than 60 MPa.
Dependencies are inferred from the claim text.