Thin-wall article

摘要

Provided is a thin-wall article formed from a polyamide resin which can be stably produced with little variation in mechanical properties such as flexural strength, flexural modulus and impact resistance. A thin-wall article formed by molding a polyamide resin (C) obtained by polycondensing a diamine (A) and a dicarboxylic acid (B) or a polyamide resin composition containing the polyamide resin, wherein 70 mol % or more of a diamine structural unit is derived from xylylenediamine and the polyamide resin has a melt viscosity (i) of 50 to 200 Pa·s as measured at a temperature of the melting point plus 10° C. for a holding time of 6 minutes at a shear rate of 122 sec−1.

主权项

1. A thin-wall article, which has a thin-wall region of 1 mm or less in thickness wherein a total mass of the thin-wall region is 10% or more of a mass of the thin-wall article,
wherein the thin-wall article is formed by molding (i) a polyamide resin obtained by polycondensing a diamine and a dicarboxylic acid, or (ii) a polyamide resin composition comprising the polyamide resin, the polyamide resin has a diamine structural unit 70 mol % or more of which is derived from xylylenediamine, the polyamide resin has a first melt viscosity of 50 to 200 Pa·s as measured at a temperature of a melting point plus 10° C. for a holding time of 6 minutes at a shear rate of 122 sec−1, the polyamide resin has a crystallization heat of 5 to 50 J/g, and 0.5 to 5% by mass of the polyamide resin has a molecular weight of 1,000 or less.