| 摘要 |
A multilayer hose for compressed air, comprising: an inner layer in contact with the compressed air, chosen from polyamides, polyamide/polyolefin blends with a polyamide matrix, copolymers having polyamide blocks and polyether blocks, a nd blends of polyamides with copolymers having polyamide blocks and polyether blocks; an outer layer made of polyamide chosen from PA-11, PA-12, aliphatic polyamides resulting from the condensation of an aliphatic diamine having fr om 6 to 12 carbon atoms and of an aliphatic diacid having from 9 to 12 carbon atoms, and 11/12 copolyamides either having more than 90% nylon-11 units or more than 9 0% nylon-12 units. At least one interlayer may be placed between the inner laye r and the outer layer chosen from polyamide/polyolefin blends with a polyamide matrix, copolymers having polyamide blocks and polyether blocks, and blends of polyamides with copolymers having polyamide blocks and polyether blocks. A reinforcing braid may be placed between the inner layer and the interlayer and/or between the interlayer and the outer layer. |
