Method for making multicolored foam and product thereof

Details Method for making multicolored foam and product thereof Method for making multicolored foam and product thereof

1990-04-24

1993-03-02

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264146, 264245, B29C 6722

Patent

active

051907062

ABSTRACT:
A method and apparatus for the preparation of multicolor, multidensity and/or multithermoplastic foam and products composed thereof. Heat-plastified foamable gels of a thermoplastic resin or resins containing blowing agents are combined and extruded simultaneously through the same orifice of a die and expanded into a foam. The color, density and/or thermoplastic resin of the secondary foamed gel or gels can form a multitude of patterns or shapes that include waves, diagonals, stripes and/or continuous coverage over the entire surface of the primary foamed gel. These patterns or shapes can be on the surface and/or within the cross-section of the primary foamed gel.

REFERENCES:
patent: 4124308 (1978-11-01), Sokolow
patent: 4248824 (1981-02-01), Hattop
patent: 4479768 (1984-10-01), Kube et al.
patent: 5110530 (1992-05-01), Havens
patent: 5125816 (1992-06-01), Morita

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