| 摘要 |
<p>A pipe (1) comprises an inner tube (2) made of a polymer material and an outer layer (3), which is enveloped on the inner tube. The outer layer comprises a mixture of repulsive-active component and other components in extract. An intermediate layer is also arranged between the inner tube and outer layer. The outer layer and the intermediate layer are formed as a heat insulation layer. A barrier layer (4) is additionally arranged at interior and/or exterior wall of the inner tube.</p> |
