| 摘要 |
<p>A tube of layered material having at least a main layer and a barrier layer, for use in transporting and storage of hydrocar- bons such as petrol, kerosene, diesel oil, fuel oil, natural gas, LPG and other similar hydrocarbons, which show similar chemical and physical properties as the properties of diffusion through plastic materials, in which tube the main layer essentially comprises polyethene or polypropene, e.g. MD-polyethene and the barrier layer comprise s polyethene or polypropene, e.g. HD-polyethene, in combination with any of the following components, butyl rubber, polyamide and polyester.</p> |
