Patent ID: 10072137

Abstract:
The present invention provides a polyamide resin composition having high melt point which can produce a molded product having high anti-vibration property or, in other words, having very high resonance frequency and, in particular, being capable of retaining high resonance frequency even upon water absorption. A polyamide resin composition, comprising a polyamide resin (A) having melt point (Tm) of 290° C. to 350° C. and having crystallization temperature upon temperature rise (Tc1) of 80 to 150° C., and glass fibers (B) having cross-sectional area of 1.5 to 5.0×10−6 cm2, characterized in that, ratio by weight of the polyamide resin (A) to the glass fibers (B) [(A):(B)] is from 20:80 to 35:65, and that the polyamide resin (A) is a copolymerized polyamide consisting of 55 to 75 molar % of a constituent unit (a) obtained from an equimolar salt of hexamethylenediamine and terephthalic acid, and 45 to 25 molar % of a constituent unit (b) obtained from 11-aminoundecanoic acid or undecane lactam.