COEXTRUSION BINDER, ITS USE FOR A MULTILAYER STRUCTURE AND THE STRUCTURE THUS OBTAINED

摘要

the present invention relates to a binder consisting of 5 to 30 parts of extruding a polymer (a) comprising a mixture of (a1) a polyethylene density between 0910 and 0.- and a polymer (a2) selected from elastomers, very low density polyethylene, metallocene polyethylenes.the polymer (a1) and (a2) is cogreffu00e9s by unsaturated carboxylic acid; and 95 to 70 parts of a polyethylene (b) density between 0910 and 1010.the mixture of polymers (a) and (b) is such that its density is between 0910 and 1010, the content of unsaturated carboxylic acid grafted from 30 to 10 ppm.and the index of flow in the molten state, measured according to astm d 1238 to 190c under a load of 2.16 kg, is between 0.1 and 3 g / 10 minutes.the binder according to the invention is particularly useful for fuel tank structure: hdpe / binding / evoh and pa / binding / hdpe.