| 摘要 |
<p>The multi-layer material comprises an inner polymer layer (6) and at least one outer layer (5) of a polymer with a mineral filler designed to adsorb and trap hydrocarbons emitted through the inner layer and reduce the structure's permeability. The mineral filler can be of a zeolite, active carbon, carbon nanotubes and mixtures of these. The polymer of the inner layer can contain fillers that reduce permeability, e.g. micrometric fillers such as talc or metal particles, or nanometric ones, such as clays. The material, which can be shaped by extrusion, injection, blowing, rotomoulding or compression, can also contain an intermediate layer (7) and have one surface treated e.g. by fluoridation to reduce its permeability.</p> |
