| abstract |
Co-extrusion / blow moldable structures used in pipes, tanks, infusion devices, filling pipes, bottles, containers, etc. used for transporting or storing fluids. [Solution] A structure having the following layers (1) to (5) in the following order, wherein all layers can be coextruded: (1) a first layer of high density polyethylene (HDPE), (2) a layer of binder material, (3) a second layer of EVOH or EVOH-based blend material, (4) a layer of optional binder material, (5) Third layer of blend material consisting of the following (100% by weight as a whole): polyamide (A) having a molding temperature of 230 ° C. or lower 50 to 90%, high density polyethylene (HDPE) 1 to 30%, elastomer and super 5-30% impact modifier selected from low density polyethylene, provided that at least one of the HDPE and impact modifier is partially or fully functionalized. A layer based on polyamide and HDPE is in contact with the fluid. [Selection figure] None |