| 摘要 |
<p>A panel element of a compound structure comprises at least one layer (1, 2) comprising a polymeric material and at least one further layer (3, 4). The further layer is constituted by a relatively rigid surface layer (3, 4) provided on at least a part of the surface of the panel. The polymeric material layer (1, 2) is formed by a foam composite material comprising a hardened resin, a fibrous material and a thermoplast, which is in the form of expanded particles.</p> |
