Heat shrinkable co-extruded film and relevant preparation procedure
AssigneeSoten S.r.l.
InventorGuido Landoni
Life of this patent
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Abstract
Three-layer heat shrinkable co-extruded film, the intermediate layer consisting of linear low density polyethylene or linear medium density polyethylene, added with hydrogenated hydrocarbon resins or other resins or low molecular weight polyethylene or polypropylene waxes, and the two external layers consisting of polypropylene or ethylene-propylene copolymer added with resins or waxes of the same group as used for the intermediate layer.
Claims10
Three-layered heat-shrinkable coextruded film, the two external layers consisting of PP (polypropylene) or EPC (ethylene-propylene copolymer) blended with resins selected from the group consisting of hydrogenated hydrocarbon resins, terpene resins, phenolic resins, pine resins, polycyclopentadiene, low molecular weight polyethylene or polypropylene waxes, very low density polyethylene (VLDPE), maleic anhydride (MA) polymer, acrylic ester (AE) polymer, ethylene-acrylic ester-maleic anhydride terpolymer and EVA/MA terpolymer and the intermediate layer consisting of linear low density polyethylene (LLDPE) or linear medium density polyethylene (LMDPE) blended with resins or waxes of the same group as used for the external layers.
Three-layered heat-shrinkable coextruded film, the two external layers consisting of PP (polypropylene) or EPC (ethylene-propylene copolymer) blended with 2 to 35 wt. percent of resins selected from the group consisting of hydrogenated hydrocarbon resins, terpene resins, phenolic resins, pine resins, polycyclopentadiene, low molecular weight polyethylene or polypropylene waxes, very low density polyethylene (VLDPE), maleic anhydride (MA) polymer, acrylic ester (AE) polymer, ethylene-acrylic ester-maleic anhydride terpolymer and EVA/MA terpolymer and the intermediate layer consisting of linear low density polyethylene (LLDPE) or linear medium density polyethylene (LMDPE) added with 1.0 to 35 wt. percent of resins or waxes of the same group as used for the external layers.
Dependencies are inferred from the claim text.