High-melting polyamide resin composition excellent in vibration resistance during water absorption

摘要

High resistance to vibration characteristic, that is, has a very high resonant frequency, and provides a high-melting polyamide resin compositions, particularly capable of retaining the resonant frequency high even during water absorption. Melting (Tm) is a 290 ℃ ~350 ℃, the polyamide resin heating crystallization temperature (Tc1) is 80~150 ℃ (A), the cross sectional area of 1.5~5.0 × ¹⁰ -6 cm A polyamide resin composition containing the ^two glass fibers (B), the weight ratio of the polyamide resin (A) and glass fiber (B) ((A) :( B)) is 20: 80-35: 65 There, a polyamide resin (A) is (a) constituent units from 55 to 75 mole% derived from the equivalent amount equimolar salt of hexamethylenediamine and terephthalic acid, obtained from (b) 11- aminoundecanoic acid or undecanoic lactam structure and characterized in that it is a copolyamide composed of units from 45 to 25 mol%.