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

摘要

the present invention relates to a binder consisting of coto 30 parts of a polymer (a) comprising a mixture of a polyethylene.(a) density between 0935 and 0.980 and a polymer (a) selectedthe elastomers, very low density polyethylene andcopolymers of ethylene, polymer (a1) and (a2) is cogreffu00e9s byunsaturated carboxylic acid; and 95 to 70 parts of a polyethylene (b)between 0930 and density analysis. the mixture of polymers (a) and(b) is such that its density is between 0930, 0950, contentthe unsaturated carboxylic acid grafted from 30 to 10000 ppm, andthe index of flow in the molten state, measured according to astm d 1238 to 190c- 21.6 kg is between 5 and 100. the binder is particularly usefulthe fuel tank structure: hdpe / binding / evoh and pa /binding / hdpe.