TH27197B - Multilayer films and packaging - Google Patents

Abstract

DC60 (19/08/41) This invention provides a five-layer, multilayer film, with each layer made up of dense resin. in the following order: Layer 1: ethylene-alpha-olefin copolymer with a density of 0.930 to 0.950 g/cm3, class 2: ethylene-alpha. - Olefin copolymer with a density of 0.890 to 0.920 g/cm3, layer 3: polypropylene with a density of 0.900 to 0.930 g/cm3, layer 4: ethylene. - Alpha-Olefin Copolymer with density 0.890 to 0.920 g/cm3, class 5: ethylene-alpha-olefin. Copolymers with a density of 0.915 to 0.950 g/cm3, and packaging made from this film. This packaging is useful for containing liquid medicine, blood or similar medical applications. This invention provides A five-layer multilayer film, where each layer is made up of resins of the following order density: Layer 1 ethylene-(formula)- olefin copolymer with a density of 0.930 to 0.950 g/cm3 second layer ethylene-(formula)- olefin copolymer with a density of 0.890 to 0.920 g/cm3 layer 3 polypropylene. with a density of 0.900 to 0.930 g/cm3, 4th layer ethylene-(formula)-olefin Copolymer with a density of 0.890 to 0.920 g/cm3 and the 5th layer ethylene-(formula)-olefin. Copolymers with a density of 0.915 to 0.950 g/cm3 and packaging made from this film. This packaging is useful for liquid medicine, blood or similar medical applications:

Claims (1)

1. A five-layer multilayer film, where each layer is made up of dense resins in the following order: layer 1 ethylene - (formula) - dense olefin copolymer. 0.930 to 0.950 g / cm 3 layer 2 ethylene - (formula) - olefin copolymer with a density of 0.890 to 0.920 g / cm 3 layer 3 polypropylene Lean with a density of 0.900 to 0.930 g / cm 3, layer 4 ethylene - (formula) - olefin. A copolymer with a density of 0.890 to 0.920 g / cm 3.and class 5 ethylene - (formula) - olefin. A copolymer with a density of 0.915 to 0.950 g / cm3 2. Multilayer film according to claim 1, where the resin used in layer 5 is a composite resin obtained by mixing ethylene - (Recipe) - olefin A copolymer with a density of 0.915 to 0.950 g / cm3 with polypropylene with a density of 0.900 to 0.930 g / cm 3 in a weight ratio of 1: 3 to 9: 1. Class according to claim 1, where the resin in layer 3 is a composite resin obtained by mixing polypropylene with a density of 0.900 to 0.930 g / cm3 with ethylene - (formula). - olefin copolymer with a density of 0.860 to 0.930 g / cm3 not more than 60% by weight 4. Multilayer film according to claim 3 where the resin in layer 3 is a composite resin obtained by A combination of polypropylene with a density of 0.900 to 0.930 g / cm 3 with ethylene - (formula) - olefin copolymer with a density of 0.860 to 0.930 g / cm 3. 5-20% by weight 5. Multilayer films according to any claim 1 to 4, where the second and fourth resins are mixed resins containing Ethylene - (Formula) - Olefin A copolymer with a density of 0.910 to 0.930 g / cm 3 30-60% by weight, ethylene - (formula) - olefin. Copolymer with a density of 0.860 to 0.900 g / cm3 not more than 35-65% by weight and polyethylene density 0.955 to 0.970 g / cm3 not more than 1-10% by weight 6. .Multilayer film according to any claim 1 to 5, where the polypropylene layer 3 is used with a melting flow rate of 1 to 40 g / min (230 ° C) and melting point 140 to. 170 degrees Celsius 1. Multilayer films according to claim 7, where the total thickness of the film ranges from 200 to 300 microns; 9. Packaging obtained by forming a multilayer film in accordance with any claim 1 to 8, the packaging consists of the first layer of this multilayer film as the outer layer and the fifth layer as the inner 1 0. Packaging according to claim 9, obtained by separating the polyethylene pipe between the film and connecting it to the film.