Abstract:
A membrane comprising a base layer (A) and a top layer (B), where the base layer (A) comprises a heterophasic composition (I) containing the following polymer components, all percent amounts being by weight: a) 10-40% of a propylene homopolymer, or copolymer containing over 85% of propylene, and having a fraction insoluble in xylene at room temperature greater than 80%; and b) 60-90% of one or more α-olefin/ethylene copolymers containing less than 40% of ethylene and having solubility in xylene at room temperature greater than 70%; the amounts of (a) and (b) being referred to the total weight of (a) and (b); and the top layer (B) comprises one or more of a homopolymer and copolymer(s) of propylene containing from 65 to 99% by weight of propylene; said top layer (B) being at least partially bonded to the base layer (A).
Abstract:
Films especially suitable for the packaging of fresh foodstuff, like salad and vegetables, due to their valuable balance of high permeability to oxygen and optimal permeability to water vapour, comprising at least one layer A) and at least one layer B), wherein the layer A) comprises a copolymer of propylene with hexene-1 containing from 3 to 9% by weight of recurring units derived from hexene-1, said copolymer having a melting temperature from 125° C. to 143° C., and the layer B) comprises a polyolefin composition containing (all percentages being by weight): a) 10-40% of one or more propylene homopolymers or copolymers containing over 85% of propylene and having a fraction insoluble in xylene at room temperature greater than 80%; and b) 60-90 of one or more copolymers of ethylene with alpha-olefin(s), containing ethylene in a quantity from 20 to 80%, and having solubility in xylene at room temperature greater than 70%.
Abstract:
A polyolefin composition comprising: A) from 19 wt% to 50 wt% of a propylene ethylene copolymer having an ethylene derived units content ranging from 1.5 wt% to 6.0 wt%; B) from 50 wt% to 81 wt% of a propylene ethylene 1-butene terpolymer having an ethylene derived units content ranging from 1.5 wt% and 6.0 wt% and 1-butene derived units content of between 4.8 wt% and 12.4 wt%; the sum of the amount of component A) and B) being 100; the composition being characterized by the following features: - the ratio C2wt%/C4wt% is comprised between 0.22 and 3.0, where C2wt% is the weight per cent of ethylene derived units and C4wt% is the weight per cent of 1-butene derived units; - the content of xylene soluble fraction at 25°C is comprised between 2 and 15 wt%; - molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than 4.0; recoverable compliance at 200°C having a maximum value between 800 and 1200 seconds lower than 65x10-5 Pa-1.
Abstract:
A film made from or containing a polyolefin composition made from or containing: A) from about 19 wt % to about 50 wt %, based upon the total weight of the polyolefin composition, of a propylene ethylene copolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt %, based upon the total weight of the propylene ethylene copolymer; and B) from about 50 wt % to about 81 wt %, based upon the total weight of the polyolefin composition, of a propylene ethylene 1-butene terpolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt %, based upon the total weight of the propylene ethylene 1-butene terpolymer, and 1-butene derived units content of between about 4.8 wt % and about 12.4 wt %, based upon the total weight of the propylene ethylene 1-butene terpolymer; the sum of the amount of component A) and B) being 100.
Abstract:
Films or sheets comprising a layer of a heterophasic propylene copolymer containing up to 7.0% by weight of ethylene-derived units and comprising: (a) from 80% to 92% by weight of a matrix phase being a propylene homopolymer or a propylene copolymer containing up to 5% by weight of units derived from ethylene and/or an alpha-olefin; and (b) from 8% to 20% by weight of a rubber phase that is an ethylene-propylene copolymer containing from 20% to 60% by weight of ethylene-derived units.
Abstract:
A polymer filament comprising a polyolefin composition which comprises at least 10% by weight of one or more copolymer(s) (I) of propylene with one or more comonomers selected from ethylene, C4-C10 α-olefins and their combinations, said copolymer or copolymers (I) having MFR from 0.5 to 10 g/10 min. and containing units deriving from the said comonomers in a total amount of from 0.5 to 25% by weight with respect to the total amount of all momoner units in the copolymer, provided that, in the absence of comonomer units deriving from C6-C10 α-olefins, the amount of comonomer units deriving from ethylene or C4-C5 α-olefins or their combinations is at least 2.5% by weight.
Abstract:
An oriented monolayer or multilayer film, wherein the monolayer film comprises a copolymer (A1) of propylene with hexene-1 containing from 4 to 10% by weight of hexene-1 and having MFR from 0.5 to 10 g/10 min., and the multilayer film comprises at least 30% by weight of said copolymer (A1), both the monolayer and the multilayer film being obtainable with a process comprising a drawing step wherein the film is drawn with a draw ratio of at least 3, in at least one direction.