Abstract: A sealable film is disclosed comprising (i) a base layer comprising polypropylene and a hydrocarbon resin and (ii) at least one top layer comprising (a) an ethylene/propylene copolymer having an ethylene content of not more than about 10% by weight, (b) a propylene/1-butene copolymer, (c) a propylene/ethylene/alpha-olefin terpolymer, or (d) a blend of two or more of (a), (b) and (c), wherein at least one of said base layer and said at least one top layer contains an anti-blocking agent or lubricant. The film possesses improved barrier properties with respect to permeability to water vapor and oxygen, and which at the same time exhibits favorable slip properties and low shrink values.

Abstract: A transparent, coextruded, multilayer polyolefin film which can be heat-sealed at low temperatures and comprises a base layer and at least one top layer applied on one side. The multilayer film has, at 120.degree. C., a longitudinal shrinkage of greater than about 10%, preferably from about 15% to about 35%, and a transverse shrinkage of greater than about 10%, preferably from about 15% to about 35%. The multilayer film has, at 90.degree. C., a longitudinal shrinkage of at most about 10%, preferably from about 3% to about 8%, and a transverse shrinkage of at most about 10%, preferably from about 2% to about 8%. The top layers have a minimum sealing temperature of at most about 124.degree. C., preferably from about 75.degree. C. to about 110.degree. C. The film is useful as a packaging film.

Abstract: A biaxially oriented multilayer film composed of a base layer and at least one outer layer. The base layer contains a propylene polymer. The outer layer contains two components A and B, the component A being composed of a high-density polyethylene (HDPE) and the component B of a copolymer of ethylene and propylene or ethylene and butylene or propylene and butylene or ethylene and another .alpha.-olefin containing 5 to 10 carbon atoms or propylene and another .alpha.-olefin containing 5 to 10 carbon atoms or of a terpolymer of ethylene and propylene and butylene or ethylene and propylene and another .alpha.-olefin containing 5 to 10 carbon atoms or of a mixture of two or more of the copolymers and/or terpolymers mentioned. The film has excellent properties and is useful, for example, as a packaging film, in a laminate, and as a backing film.

Abstract: A nonsealable, matt, hazy, biaxially oriented multilayer film comprising a base layer and at least one outer layer wherein the base layer contains a propylene polymer and the outer layer(s) contain(s) high-density polyethylene (HDPE) and a polypropylene polymer. The film has a haze value, measured in accordance with ASTM D 1003, of greater than 40. The film is useful, for example, in the production of laminates or as a backing film for an adhesive on coating.

Abstract: A printable, biaxially oriented polyolefin multilayer film which is low-temperature sealing on both sides and comprises a base layer and at least one sealing layer on each side of the base layer, the base layer containing a peroxide-degraded propylene homopolymer and each sealing layer containing an ethylene/propylene/butylene terpolymer and a propylene/butylene copolymer, one outer sealing layer containing a polydiorganosiloxane and silicon dioxide particles and not being corona-treated and the polydiorganosiloxane being added in the form of a masterbatch during the film production, results in a multilayer film especially useful as a packaging film.

Abstract: A polypropylene multilayer, coextruded, transparent, and metallizable film which has isotropic mechanical properties and contains a low-molecular-weight hydrocarbon resin and an antistatic agent in the base layer and an antiblocking agent in the outer layer is described. The film is free from lubricants in the outer layers. The invention furthermore relates to a process for the production of such films and to their use as, for example, packaging films or twist wrapping.

Abstract: A transparent shrink film made from propylene useful for all-round labeling of essentially cylindrical containers, such as bottles, comprises a propylene polymer and has, at 100.degree. C., a shrinkage in the longitudinal direction of at least 10% and a shrinkage in the transverse direction of less than 2%. A process for producing the film is also provided.

Abstract: A multilayered, white, biaxially-oriented polypropylene film is disclosed. The film has an at least three-layered build-up and has a base layer comprised of propylene polymers comprising up to 2% by weight of calcium carbonate having an average particle size of not more than 2.0 .mu.m and 0 to 25% be weight of titanium dioxide, an intermediate layer comprised of propylene polymers comprising 0 to 25% by weight of titanium dioxide, relative to the total weight of the intermediate layer; and a top layer comprised of a sealable raw material. The base layer and/or the intermediate layer of the film contain a total of at least 2% by weight of titanium dioxide.

Abstract: The present invention relates to a transparent, coextruded, multi-layer polyolefin film which is heat-sealable on both sides and has a base layer which comprises a peroxidically degraded polypropylene polymer and top layers which comprise heat-sealable ethylene-propylene polymers. The multi-layer film is characterized by high shrinkability in the longitudinal and transverse directions, in combination with excellent optical properties and good runability on high-speed wrapping machines and is especially useful as a packaging or wrapping film. The invention also relates to a process for the preparation of a film of this kind and to its use.

Abstract: A non-sealable, multi-layer polypropylene film which includes on top of a polypropylene base layer at least one top layer which includes a mixture of a propylene/butylene copolymer and an ethylene/propylene/butylene terpolymer, the mixture containing ethylene in an amount of about 0.1 to 7% by weight, propylene in an amount of about 68 to 95.9% by weight and butylene in an amount of about 4 to 25% by weight, relative to the total weight of the mixture. The layer thickness of the toplayer is not greater than 0.3 .mu.m. A process for producing the film is also described.

Abstract: A transparent, coextruded multilayer polyolefin film which is heat-sealable on both sides and has a base layer essentially comprising propylene polymers and outer layers essentially comprising heat-sealable olefin polymers is described. The propylene polymer of the base layer has been peroxidically degraded, its degradation factor A being in the range of about 3 to about 10. The heat-sealable olefin polymer of the outer layers is an ethylene-propylene copolymer having an ethylene content in the range of about 2 to about 8% by weight which has also been peroxidically degraded. Its degradation factor A is in the range of about 3 to 15. The film is useful as, for example, a packaging film.

Abstract: A shrink film which is comprised of a plurality of polyolefinic layers is disclosed. The base layer comprises polypropylene and a hydrogenated hydrocarbon resin admixture, and the top layers on each side of the base layer comprise polyolefinic sealable raw materials. The film possesses a shrinkability of more than 15% in the transverse direction and of less than 6% in the longitudinal direction, both measured at 90.degree. C. Also disclosed is a process for manufacturing the film comprising coextrusion followed by stretching of the film in the longitudinal and transverse directions, whereby stretching in the longitudinal direction is performed such that the double refraction value .DELTA.n of the longitudinally oriented film is not greater than 15.times.10.sup.-3.

Abstract: The biaxially oriented film based on a propylene polymer contains an inorganic particulate neutralizing agent, in particular a carbonate or magnesium oxide. To improve the slip properties, the particles have been given a hydrophobic coating, in particular a coating of wax, a fatty acid, a salt of a fatty acid or an ester of a fatty acid.

Abstract: A shrink film comprising at least one polyolefinic layer comprising polypropylene and a resin admixture is disclosed. The film processes a shrinkability of more than 20%, measured at 90.degree. C., in the transverse direction and of less than 8%, also measured at 90.degree. C., in the longitudinal direction. The film is manufactured by coextrusion followed by stretching in the longitudinal and transverse directions, whereby stretching in the longitudinal direction is performed such that the birefringence value .DELTA.n of the longitudinally oriented film does not exceed the range from 10.times.10.sup.-3 to 13.times.10.sup.-3.