Verfahren zur Herstellung eines Verbundwerkstoffes sowie Verbundwerkstoff und dessen Verwendung

DE 102007041268 A1 UPAB: 20090407 NOVELTY - The method for the production of composite material useful for the production of endless fiber reinforced semi-finished product and/or component, comprises supplying a cross linking additive to a thermoplastic reinforcing fiber during production of the reinforcing fiber, orienting the molecules of the reinforcing fiber through stretching, fixing the molecularly oriented fiber through cross-linking (4) after stretching (3), processing the reinforcing fiber in a thermoplastic matrix or supplying heat to the fiber under formation of the fiber composite. DETAILED DESCRIPTION - The method for the production of composite material useful for the production of endless fiber reinforced semi-finished product and/or component, comprises supplying a cross linking additive to a thermoplastic reinforcing fiber during production of the reinforcing fiber, orienting the molecules of the reinforcing fiber through stretching, fixing the molecularly oriented fiber through cross-linking (4) after stretching (3), processing the reinforcing fiber in a thermoplastic matrix or supplying heat to the fiber under formation of the fiber composite. The cross linking additive is added in a concentration of 1-30 wt.% related to the thermoplastic reinforcing fiber. The cross-linking is carried out thermally, radically and/or photochemically. The radical and/or photochemical cross-linking is carried out through irradiation with ionic radiation, ultraviolet radiation and ionized radiation. The irradiation with ionized radiation and/or ionic radiation is carried out with a dose of 300-200 nm. Annealing is carried out after the cross-linking. The cross-linked reinforcing fiber is worked in a material different from thermoplastic material through melt impregnation and/or thermal extrusion in the thermoplastic matrix, and/or is mixed with the matrix polymer. The semifinished products are produced like granulates or mats. The composite material is subjected to a forming-/shaping process in a direct process after the supply of heat. The supply of heat is carried out in such a way that the temperature of the fiber and the thermoplastic matrix is 100-350 degrees C. An INDEPENDENT CLAIM is included for a composite material. USE - Method for the production of composite material useful for the production of endless fiber reinforced semi-finished product and/or component out of bone granulates, mat reinforced thermoplastic and/or fiber-filled plasticizer and for direct production of molded part (all claimed). ADVANTAGE - The method ensures simple and economical production of composite material with high strength and stiffness, low weight and good mechanical properties