Process for producing molded products of propylene resin

Details Process for producing molded products of propylene resin Process for producing molded products of propylene resin

1993-02-12

1994-03-22

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642106, 2643281, 26433117, 264349, 26433118, 524584, 525240, B29B 748, B29C 4503

Patent

active

052961869

ABSTRACT:
A process for producing a molded product of propylene resin which includes melting and kneading at least a part of the following component (a), adding to the resulting melt the following component (b) or the component (b) and the remainder of the component (a) and kneading the resulting mixture to prepare a resin composition having a melt flow rate of 1 to 100 g/10 min, and then molding the resin composition into a molded product in which the breakage rate of the component (b) is 30% by weight or less: (a) 100 parts by weight of a crystalline propylene polymer having a melt flow rate of 1 to 300 g/10 min and (b) 3 to 80 parts by weight of a filler in the form of hollow particles having a mean particle density (true density) of 0.1 to 0.9 g/cm.sup.3, as measured according to ASTM-D2840, a mean particle diameter of 7 to 100 .mu.m and a 10%-by-weight breakage pressure resistance of 100 kg/cm.sup.2 or more, as measured according to ASTM-D3102.

REFERENCES:
patent: 4003874 (1977-01-01), Ide et al.
patent: 4997875 (1991-03-01), Geddes et al.
patent: 5013771 (1991-05-01), Guillet et al.

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