Patent ID: 6746738
Filing Date: 2004-06-08
Classification: B32B,C08F,C08L,C09J,Y10T

Abstract:
A multilayer structure comprising a layer comprising a coextrusion binder comprising a blend comprising:5 to 30 parts of a cografted polymer (A) comprising 60-95 parts by weight of a high density polyethylene (A1) of relative density 0.940-0.965 and a MFI of 0.1-3 g/10 min under 2.16 kg at 190Â° C. and 40-5 parts by weight of a polymer (A2) of a metallocene polyethylene with 600 ppmâˆ’6% by weight of an unsaturated carboxylic acid or its functional derivative with respect to the weight of grafted (A1) and (A2); and 95 to 70 parts of a polyethylene (B) of relative density 0.930-0.940 and a MFI of 5-100 g/10 min under 2.16 kg at 190Â° C.; wherein a blend of the polymer (A) and the polyethylene (B) having: a relative density of 0.930-0.940, and melt flow index measured according to ASTM D 1238 at 190Â° C./2.16 kg of between 5 and 100 g/10 min; directly attached to said binder, a layer (E) selected from the group consisting of a layer of a nitrogen-containing or oxygen-containing polar resin, a layer of polyamide resin, a layer of an aliphatic polyketone, a layer of a saponified ethylene-vinyl acetate copolymer (EVOM), a layer of a polyester resin, and a metal layer.