Process for producing molding product

Details Process for producing molding product Process for producing molding product

1993-08-27

1995-10-17

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264235, 264346, 264494, B29C 7100

Patent

active

054588456

ABSTRACT:
A process for producing a hollow or sheet molded product having a superior appearance is provided, which process is characterized in that a multi-layer molded product having a surface layer (A) of a propylene random polymer of m.p. of 100.degree. to 150.degree. C. having a thickness of 1 to 20% of that of the molded product, and a substrate layer (B) of a thermoplastic resin of a m.p. higher than that of the propylene random polymer is formed and the surface layer (A) is heat-treated into a molten state, followed by immediately cooling to form a smooth surface.

REFERENCES:
patent: 3555135 (1971-01-01), Paul
patent: 4594204 (1986-06-01), Heidenreich et al.
patent: 4933123 (1990-06-01), Yoshida et al.
patent: 5259999 (1993-11-01), Iwakiri et al.

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