Method for making foamed articles having a laminated structure

Details Method for making foamed articles having a laminated structure Method for making foamed articles having a laminated structure

1986-11-05

1988-08-09

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

5DIG2, 249129, 249130, 264 453, 264 464, 264 54, 264254, 264255, 26433119, 425817R, 4283099, 4283166, B29C 6722, B29C 3918, B29C 3920

Patent

active

047626542

ABSTRACT:
A method for making a foamed article having a laminated structure comprises providing a mold having a cavity therein and a rib vertically mounted from a bottom of the cavity and having a predetermined height to establish at least two blocks on the bottom, and pouring a foamable liquid compositions into the respective blocks in amounts which permit one of the foamable liquid composition to cover the other foamable liquid composition upon foaming whereby the resulting foam has a laminated structure whose boundary between the foamed layers made of the respective foamable liquid compositions is smooth and agreeable to the touch.

REFERENCES:
patent: 2827665 (1958-03-01), Rogers, Jr. et al.
patent: 3020587 (1962-02-01), Alderfer et al.
patent: 3101244 (1963-08-01), Hood et al.
patent: 3127457 (1964-03-01), Di Pinto
patent: 3257149 (1966-06-01), Fruchte et al.
patent: 3320339 (1967-05-01), Smith
patent: 3393258 (1968-07-01), Fultz et al.
patent: 3423490 (1969-01-01), Trogdon et al.
patent: 4405681 (1983-09-01), McEvoy
patent: 4541885 (1985-09-01), Caudill, Jr.

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