| 摘要 |
The invention concerns a tube having in its radial direction, from inside outwards, an inner layer, based on fluorinated resin (or polymer) and designed to be in contact with a circulating fluid, characterised in that the inner layer consists of a mixture comprising a semicrystalline thermoplastic fluorinated resin and a block copolymer ABC, the three blocks A, B and C being linked together in that order, each block being either a homopolymer, or a copolymer obtained from two or more monomers, block A being linked to block B and block B to block C by a covalent bond or an intermediate molecule linked to said blocks by a covalent bond and to the other block by another covalent bond. The invention is further characterised in that block A is compatible with the fluorinated resin, block B is incompatible with the fluorinated resin and is incompatible with block A, block C is incompatible with the fluorinated resin, block A and block B. The tube is shock-proof and hardly permeable to gasoline. |
