| 摘要 |
The fibers are artificial and natural. An Independent claim is included for the corresponding method of manufacture, by passing fibers through an impregnator fed with liquid plastic, to form the matrix. Preferred features: The artificial fibers are allocated to selected regions of the cross section, preferably the outer regions. Natural fibers of finite length are allocated to the remaining cross section. Artificial fibers extend longitudinally, preferably continuously. All fibers are embedded in the plastic matrix, saturated or impregnated by it. In the method, fibers are drawn through the impregnators, in stranded or band form, initially separated but closing towards each other. More than one impregnator may be used. A heated die forms the final cross section. Tension is accepted and exerted by the fibers as necessary, in drawing them through the impregnators and mold or die. |
