| 摘要 |
<p>Multilayer tubes comprise, in radial sequence from outside to inside: a polyamide layer, a bonding layer, a layer of polyamide-polyolefin blend, a bonding layer, and a polyamide layer. The polyamides are nylon 11, nylon 12, reaction products of C6-C12 aliphatic diamines and C9-C12 aliphatic diacids, or nylon 11/12 copolyamides with more than 90% nylon 11 units or more than 90% nylon 12 units.</p> |
