Process for producing polyamide blow molded product

Details Process for producing polyamide blow molded product Process for producing polyamide blow molded product

1997-05-05

1998-12-08

Woodward, Ana

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264537, 264540, 525 66, 525183, C08L 7700, B29C 4302

Patent

active

058464786

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):

REFERENCES:
patent: 3926924 (1975-12-01), Edgar et al.
patent: 4128599 (1978-12-01), Thomas et al.
patent: 5028462 (1991-07-01), Matlack et al.
patent: 5436294 (1995-07-01), Desio et al.

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