Process for producing compositely reinforced polypropylene resin

Details Process for producing compositely reinforced polypropylene resin Process for producing compositely reinforced polypropylene resin

1992-10-01

1993-11-23

Hoke, Veronica P.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264211, 524449, 524494, C08K 514

Patent

active

052641740

ABSTRACT:
According to the present invention, there is provided a process for stably producing a compositely reinforced polypropylene composition having less warpage deformation and good moldability which includes the steps of using an extruder having at least three feed inlets, feeding an organic peroxide and a polypropylene resin selected from (a) a polypropylene modified by grafting an unsaturated organic acid thereonto, (b) a mixture of the resulting modified polypropylene and an unmodified polypropylene, (c) a mixture of an unsaturated organic acid and an unmodified polypropylene or (d) mixtures of the foregoing to the extruder through the first feed inlet of the extruder, feeding the lamellar inorganic filler thereto through the second feed inlet disposed at a position where the resin mixture is sufficiently melted and kneaded, feeding the glass fiber through the third feed inlet, and then melting and kneading these materials.

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