Patent ID: 7019064

Claim:
A polyamide resin composition comprising: (A) 95 to 99.0 parts by weight of a polyamide resin produced by the polycondensation of a diamine component containing 70 mol % or more of m-xylylenediamine and a dicarboxylic acid component containing 70 mol % or more of a straight-chain, aliphatic α,ω-dicarboxylic acid having 4 to 20 carbon atoms; and (B) 5 to 1.0 part by weight of a smectite treated with an organic swelling agent, the polyamide resin A meeting the requirements of (1) a terminal amino concentration of 5 to 50 μeq/g, (2) a reaction molar ratio of 0.998–0.992 when defined by a molar ratio of reacted diamine to reacted dicarboxylic acid, (3) a relative viscosity of 2.4 to 3.7 when measured at 25° C. on a 1 g/dl solution in a 96% sulfuric acid, and (4) a water content of less than 0.2%, wherein the content of the organic swelling agent in the smectite B is 20 to 50% by weight and said swelling agent is a quaternary ammonium salt having at least one alkyl or alkenyl group having 12 or more carbon atoms.