Verstärkte Polyamidformmassen

摘要

Preparation of highly-rigid but viscous, reinforced polyamide molding mass, by pultrusion (strand-forming) process, comprises melting the polymeric portion and completely impregnating an endless fiber strand with the polymer melt, followed by cooling and cutting to give a long-fiber-reinforced, rod-shaped granulate. Preparation of highly-rigid but viscous, reinforced polyamide molding mass, by pultrusion (strand-forming) process, comprises melting the polymeric portion and completely impregnating an endless fiber strand with the polymer melt, followed by cooling and cutting to give a long-fiber-reinforced, rod-shaped granulate, where the polyamide molding mass exhibit a thermostability value HDT/A (heat deflection temperature at a load A of 1.8 MPa) (according to ISO 75) of above 242[deg]C, preferably 245[deg]C, HDT/C (heat deflection temperature at a load C of 8 MPa) of above 150[deg]C, preferably 170[deg]C, and a polyamide matrix; and the polyamide molding compound contains a blend of polyamide 66 (A); copolyamide (B), obtained from (b1) 50-80 wt.%, preferably 50-70 wt.% of an equimolar combination of terephthalic acid and hexamethylene diamine and (b2) 50-20 wt.%, preferably 50-30 wt.% of an equimolar combination of isophthalic acid and hexamethylene diamine (where the parts by weight of (b1) and (b2) is 100 wt.%) and a filler component containing a mixture of glass fibers (C) and carbon and/or carbon fibers (D), where the sum of the weight percentage of the components (A) to (D) is 100%, the sum of (A) and (B) is 20-60 wt.%, weight ratio of (A) to (B) is 50/50 to 95/5, the sum of (C) and (D) is 40-80 wt.%, weight ratio of (C) to (D) is 80/20 to 95/5, the polyamide molding mass optionally contains an additive, and the quantity adds to the sum of the components (A) to (D). Independent claims are included for: (1) a long-fiber-reinforced rod-shaped granulate (with a granulate length of 4-25 mm, preferably 5-12 mm), obtained by the process; (2) a procedure for the production of molded articles and/or hollow bodies from long-fiber-reinforced rod-shaped granulates comprising extruding, injection molding or pressing; and (3) a molded product obtained from the long-fiber-reinforced rod-shaped granulate.