Process for producing polyamide blow molded product

Abstract

A process for producing a molded product having excellent heat resistance, which including forming a composition including a crystalline polyamide by mixing together (a) 50-90% by weight of a hexamethylene adipamide component, (b) 5-40% by weight of a hexamethylene terephthalamide component, (c) 5-30% by weight of a hexamethylene isophthalamide component, components (a), (b) and (c) being based on the weight of the crystalline polyamide, and (d) 1-150 parts by weight of an elastomer, based upon 100 parts by weight of the crystalline polyamide; forming a melt polymer from the composition and applying shear to the melt polymer, the melting point (Tm) and crystallization temperature (Tc) of the crystalline polyamide being Tm.gtoreq.225.degree. C. and Tc.ltoreq.230.degree. C., respectively, and the melt viscosity of the crystalline polyamide varying greatly depending on the shear rate applied to the melt polymer and satisfying formulae (I) and (II): 2,000,000.gtoreq..mu.a10.gtoreq.2,000 (I) .mu.a10/.mu.a1000.gtoreq.3.3 (II) wherein: Tm: melting point of the polyamide (.degree.C.) .mu.a10: melt viscosity at a temperature of Tm+20.degree. C. and a shear rate of 10 (1/sec) (poise) .mu.a1000: melt viscosity at a temperature of Tm+20.degree. C. and a shear rate of 1000 (1/sec) (poise); and forming a parison from the melt polymer and blow molding the parison to form the molded product.

Dependencies are inferred from the claim text.