| 摘要 |
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>/=225 DEG C. and Tc</=230 DEG 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>/= mu a10>/=2,000 (I) mu a10/ mu a1000>/=3.3 (II) wherein: Tm: melting point of the polyamide ( DEG C.) mu a10: melt viscosity at a temperature of Tm+20 DEG C. and a shear rate of 10 (1/sec) (poise) mu a1000: melt viscosity at a temperature of Tm+20 DEG 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.
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