| 摘要 |
<p>Multilayer composite material comprising a core layer (10) which is formed of woven synthetic or metal yarns or fibers (12), and which is impregnated with a plastic material (14), the density of said core layer being variable in its thickness and increasing from its medial plane up to its outer faces, the material further comprising at least one outer coating layer (16, 18) formed for example by yarns or fibers (19) embedded in a plastic material compatible with that of the medial or core layer (10), the outer fibers/medial plane density ratio of the material being comprised between 3 and 13. </p> |
