Process for the production of foam cushions from different fluid

Details Process for the production of foam cushions from different fluid Process for the production of foam cushions from different fluid

1988-08-01

1991-05-28

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 464, 264 466, B29C 6722

Patent

active

050193040

ABSTRACT:
A process for the production of foam cushions from different fluid reaction mixtures comprising introducing a first reaction mixture and at least one other reaction mixture into a mold cavity and leaving the mixtures to react to form a cushion having zones of differing elasticity or firmness, characterized in that one of the two reaction mixtures is not introduced into the mold cavity until it has creamed up and is already viscous, and in that the second reaction mixture, which has not creamed up, is introduced at the same time or later.

REFERENCES:
patent: 3786122 (1974-01-01), Berg
patent: 4190697 (1980-02-01), Ahrens
patent: 4246361 (1981-01-01), Yukuta et al.
patent: 4405681 (1983-09-01), McEvoy
patent: 4714574 (1987-12-01), Tenhagen

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