Back to results
US 6,211,295 B1Granted
Polyolefin compositions and blown films obtained therefrom
AssigneeMontell Technology Company by Hoofddorp
InventorsEmanuele Burgin, Claude Palate, Pierre Coosemans
Life of this patent
Estimating the term…
Abstract
Polyolefin compositions comprising: A) a heterogeneous polyolefin composition itself comprising a fraction (A1) which is insoluble in xylene at room temperature and a fraction (A2) which is soluble in xylene at room temperature; and B) a branched propylene polymer. The said compositions are particularly processable when used in the process for the preparation of blown films. The films obtained by the said process are moreover characterized by excellent mechanical properties.
Claims10
Blown films, comprising a polyolefin composition comprising:
- (A) from 70% to 99% of a polyolefin composition having:
- (A1) 35-85 parts by weight of a fraction which is insoluble in xylene at room temperature, comprising a substantially linear propylene homopolymer and/or a substantially linear copolymer of propylene with ethylene and/or another α-olefin CH2=CHRI, where RI is an alkyl radical having 2-10 carbon atoms, this fraction containing more than 85% by weight of units derived from propylene;
- and
- (A2) 20-65 parts by weight of a fraction which is soluble in xylene at room temperature, comprising a substantially liner amorphous copolymer of ethylene with propylene and/or another α-olefin CH2=CHRI, where RI has the meaning described above, this fraction optionally containing smaller proportions of a diene, and containing more than 15% by weight of units derived from ethylene;
- and
- (B) from 1 to 30% by weight of a propylene polymer with a branching number less than 1.
3 more elements
Dependencies are inferred from the claim text.