Abstract: Multi-layer, gas-barrier, either cast or solid-state oriented, heat-shrinkable, annealed or heat-set, films and sheets suitable for packaging applications which comprise a microlayer sequence (a) comprising a number n of identical repeating units (a?), each comprising the sequence A/B/C, wherein A is a layer comprising a major proportion of one or more thermoplastic (co)polyamides, B is either a layer comprising a major proportion of one or more ethylene-vinyl alcohol copolymers or a layer comprising a major proportion of a (co)polyamide characterized by an OTR of less than 100 cm3.25 ?m/m2.day.bar at 23° C. and 0% of RH, C is either nil or a layer comprising a major proportion of one or more thermoplastic (co)polyamides, and n stands for an integer of 3 or more, an outer layer (b) comprising one or more polymers selected from polyolefins, modified polyolefins, and thermoplastic (co)polyesters, and a tie layer between the outer layer (b) and the microlayer sequence (a).

Abstract: A stretch film heat-sealable to polystyrene-based material comprising a first outer heat-sealing layer, a second outer layer and at least an intermediate layer, comprising in the first outer heat-sealing layer a TPE-S such as a styrene-butadiene-styrene block terpolymer (SBS) or a hydrogenated derivative thereof. Also described are packages made with the new stretch film.

Abstract: A thermoplastic multilayer packaging film has a core layer including ethylene/vinyl alcohol copolymer; two outer layers, and two adhesive layers each disposed between the core layer and a respective outer layer, characterized in that at least one of the outer layers includes a blend of A, B, and C, wherein component A is a homogeneous or heterogeneous ethylene/alpha olefin copolymer with density comprised greater than 0.915 g/cm3 and less than 0.925 g/cm3, component B is a homogeneous or heterogeneous ethylene/alpha olefin copolymer with density greater than or equal to 0.925 g/cm3, and component C is a homogeneous or heterogeneous ethylene/alpha olefin copolymer with density less than or equal to 0.915 g/cm3. The use of modified homogeneous ethylene/alpha olefin copolymers with a density of from 0.900 g/cm3 to 0.

Abstract: A method of making the a multilayer, biaxially oriented, heat shrinkable thermoplastic film includes a layer having between 50 and 100 parts by weight ethylene/alpha-olefin C4-C12 copolymer, and between 0 and 50 parts by weight of a polymer selected from polyolefin, and modified polyolefin, the layer having more than one melting point when detected by diffential scanning calorimetry according to ASTM D-3418; wherein the total thickness variation in the multilayer film is lower than ±10%.

Abstract: A heat-shrinkable film comprising a core layer comprising an ethylene-vinyl alcohol copolymer, two outer layers of blends comprising ethylene-vinyl acetate and ethylene-.alpha.-olefin copolymers, and two adhesive layers, characterized in that said film has a free shrink of at least 40%, preferably at least 45% and most preferably at least 50%, in both dimensions at 120.degree. C. and a maximum shrink force in the transversal direction, throughout its range of shrink temperatures, not exceeding 0.5. N/cm. The film is suitable to package deformable articles such as trays to give a tight package without causing deformation.

Abstract: A multilayer, biaxially oriented, heat shrinkable thermoplastic film includes a layer having between 50 and 100 parts by weight ethylene/alpha-olefin C.sub.4 -C.sub.12 copolymer, and between 0 and 50 parts by weight of a polymer selected from polyolefin, and modified polyolefin, the layer having more than one melting point when detected by diffential scanning calorimetry according to ASTM D-3418; wherein the total thickness variation in the multilayer film is lower than .+-.10%, and wherein the average deviation of the multilayer film from a straight line is lower than .+-.40 mm, and wherein the sag average of the multilayer film is lower than 25 mm. A method of making the film, and a package made with the film, are also disclosed.

Abstract: A heat shrinkable multilayer film includes a core layer including a blend having ethylene/propylene copolymer and propylene homopolymer, or ethylene/propylene/propylene/butene-1 terpolymer and propylene homopolymer; and two outer layers each including at least 50%, by weight of each respective outer layer, of ethylene/propylene/butene-1 terpolymer, ethylene/propylene copolymer, or a blend of ethylene/propylene/butene-1 terpolymer and ethylene/propylene copolymer.

Abstract: A process for the manufacture of a multilayer cross-linked, heat-shrinkable, polyolefin film, said film having at least one inner layer comprising thermo-plastic polymer sandwiched between two outer layers comprised of thermoplastic polymer different from the thermoplastic polymer of said inner layer, comprising the steps ofa) coextruding the materials into a tape;b) cross-linking it;c) converting said cross-linked tape into a heat-shrinkable film by orientation;characterized in that scrap material produced in the manufacture or in the further processing to finished articles of cross-linked films of this same structure is incorporated by recycling it into said step a) in an amount up to 50% by weight of the total film weight.

Abstract: A thermoplastic multilayer packaging film is described which has a % free shrink at 100.degree..degree. C. lower than 30 in both directions and a % free shrink at 120.degree. C. higher than 45 in at least one direction, and comprises at least the following layers:(i) an oxygen barrier core layer comprising ethylene-vinyl alcohol copolymer;(ii) two outer or skin layers and(iii) two inner adhesive layers each adhering to opposite respective surfaces of the core layer,said film being characterized in that the outer layers (ii) essentially consist of a polymeric blend of a Component A and a Component B wherein Component A is used in a major amount and is selected from the group consisting of heterogeneous ethylene-.alpha.-olefin copolymers with a density .ltoreq.0.915 g/cc, homogeneous ethylene-.alpha.-olefin copolymers with a density .ltoreq.0.

Abstract: A multi-layer heat-shrinkable film endowed with high anti-fog properties, and having a barrier layer (1), an adhesive layer (2, 2'), and an adhesive layer (3, 3'), wherein at least one external layer (3, 3') is made of a polyolefinic polymer. Said anti-fog properties are obtained by incorporating in said film from 1 to 5% by weight of a composition comprising (i) a glycerol mono-ester of a saturated or unsaturated fatty acid having from 8 to 20 carbons, (ii) a glycerol di-ester of a saturated or unsaturated fatty acid having from 8 to 20 carbons, and (iii at least one polyoxyethylene ether of a fatty alcohol having from 8 to 20 carbons.

Abstract: A process for the manufacture of a multilayer, cross-linked, heat shrinkable, polyolefin film, the film having at least one inner layer including a thermoplastic polymer sandwiched between two outer layers including a thermoplastic polymer different from the thermoplastic polymer of the inner layer, including the steps of coextruding the polymers into a tape; cross-linking the tape; and converting the cross-linked tape into a heat shrinkable film by orientation; wherein scrap material produced in the manufacture of the heat shrinkable film is incorporated by recycling the film into the coextrusion step in an amount up to 50% by weight of the total film weight.