Verfahren zur Herstellung eines Verbundwerkstoffes sowie Verbundwerkstoff und dessen Verwendung

(A1) Die Erfindung betrifft ein Verfahren zur Herstellung eines Verbundwerkstoffes, bei dem thermoplastische Verstaerkungsfasern beim Herstellungsprozess mit Vernetzungsadditiv versehen werden und bei dem dann anschliessend eine Orientierung der Molekuele der Verstaerkungsfaser durch Recken erfolgt. Die so behandelte Verstaerkungsfaser wird dann in eine thermoplastische Matrix eingearbeitet. Die Erfindung betrifft weiterhin den Verbundwerkstoff als solches 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.