| abstract |
The present invention relates to a structure successively comprising: a first layer of high density polyethylene (HDPE), a layer of binder, a second layer of EVOH or of an EVOH-based mixture, optionally a layer of binder, a third layer of a mixture comprising by weight, the total being 100%: 50 to 90% of polyamide (A) having a transformation temperature of at most 230 ° C, 1 to 30% of high density polyethylene (HDPE), 30% of a shock modifier selected from elastomers and very low density polyethylenes, at least one of the HDPE and the impact modifier being functionalized in whole or in part, the layers being coextrudable.The present invention also relates to devices for transferring or storing fluids and more particularly pipes, tanks, chutes, bottles and containers made of the above structure and in which the layer of the polyamide (A) and HDPE mixture is in contact with each other. act directly with the fluid contained or transported. These devices can be manufactured by the usual techniques of the thermoplastic polymer industry such as coextrusion and coextrusion blow molding. |