MULTILAYER PLASTIC PIPE, TRANSPORT PIPE AND HOLLOW BODY CONSISTING OF SAID PLASTIC PIPE AND PRODUCTION OF INJECTION FIT PIPE AND TANK CONTAINER

摘要

PURPOSE: To provide manufacturing methods of a multilayer plastic pipe, a transport pipe and a hollow body comprising the multilayer plastic pipe, an injection fitting pipe, and a tank container. CONSTITUTION: I. An external layer comprising a molding material of which the base is polyamide. II. An intermediate layer being adjacent to the external layer and comprising a molding material of which the base is a mixture comprising (a). 95-99 wt.% of a crystalline polyester of a straight chain, and (b). 1-5 wt.% of a compound having at least two isocyanate groups (in this case, the isocyanate group of the component II.b. is contained by a concentration of 0.03-0.3 wt.% in the mixture comprising II.a. and II.b). III. An intermediate layer comprising a molding material of which the base is a polyamide. IV. An intermediate layer comprising a molding material of which the base is a mixture comprising (a). 50-90 wt.% of a polyamide and (b). 10-50 wt.% of poly(alkyl)acrylic ester, and being adjacent to an internal layer. V. The internal layer comprising a molding material of which the base is polyvinylidene fluoride. This multilayer plastic pipe comprises the external layer, the intermediate layers and the internal layer, and respective layers being adjacent are firmly combined to each other.