Structure, useful in devices (e.g. pipes) to transfer/store fluids, comprises first layer of polyethylene, binding layer, second layer of ethylene vinyl alcohol and third layer comprising polyamide, polyethylene and modifying agent

摘要

Structure (I) comprises a first layer of high-density polyethylene (HDPE) (B), binding layer, second layer of ethylene vinyl alcohol (EVOH) or its mixture, optionally a binding layer, and a third layer of a mixture (comprising polyamide A; (B); and modifying shock (C) (elastomers or polyethylenes)) (where (B) and (C) are functionalized as whole or part, and the layers are coextrudable). Structure (I) comprises a first layer of high-density polyethylene (HDPE) (B), binding layer, second layer of ethylene vinyl alcohol (EVOH) or its mixture, optionally a binding layer, and a third layer of a mixture (comprising polyamide A (50-90 wt.%) (having transformation temperature of 230[deg]C); (B) (1-30 wt.%); and modifying shock (C) (5-30 wt.%) (elastomers or polyethylenes)) (where (B) and (C) are functionalized as whole or part, and the layers are coextrudable). An independent claim is also included for devices for transfer or storage of fluids (preferably pipes, reservoirs, chutes, bottles and containers) comprising (I), in which the third layer is in direct contact with the contained or transported fluid.