High-temperature polyamide molding compounds reinforced with flat glass fibers

A reinforced polyamide molding compound having a high notched impact strength, consisting of:

• (A) 20 to 60 wt % of at least one partially aromatic polyamide with a DSC melting point (ISO 11357) of at least 270° C., having a solution viscosity, measured in m-cresol (0.5 wt %, 20° C.) of ηrel less than 1.9,
• the one or more polyamides selected from the group consisting of:
• polyamide 6T/6I, which contains 50 to 80 mol % hexamethyleneterephthalamide units and 20 to 50 mol hexamethyleneisophthalamide units;
• polyamide 6T/66 which contains 50 to 80 mol % hexamethyleneterephthalamide units and 20 mol % to 50 mol % hexamethyleneadipamide (66) units;
• ternary polyamide 6T/6I/66 containing 50 mol % to 70 mol % hexamethyleneterephthalamide units, 5 mol % to 45 mol % hexamethyleneisophthalamide units and 5 mol % to 45 mol % hexamethyleneadipamide (66) units;
• and mixtures, blends or alloys thereof;
• (B) 40 to 80 wt % of at least one filler consisting of:
• (B1) 20 to 80 wt % flat glass fibers with an elongated shape, where the glass fibers have a noncircular cross-sectional area and a dimension ratio of the main cross-sectional axis to the secondary cross-sectional axis of 2 to 6,
• (B2) 0-30 wt % particulate or stratified fillers,
• (B3) 0-30 wt % boron fibers and/or basalt fibers and/or aramid fibers (p- or m-aramid fibers),
• (B4) 0 to 30 wt % glass fibers with a round cross section,
• wherein the weight percent of each type of filler (B1)-(B4) is based on the entire molding compound;
• and
• (C) 0 to 20 wt % of additives and auxiliary substances, not including carbon fiber,
• wherein the amount of components (A) through (C) in wt % yields 100% together.