Method of producing continuous planar expanded polyurethane bloc

Details Method of producing continuous planar expanded polyurethane bloc Method of producing continuous planar expanded polyurethane bloc

1976-03-04

1978-04-04

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 48, 264 51, B29D 2700

Patent

active

040828247

ABSTRACT:
A method for producing continuous polyurethane blocks having a planar upper surface and a rectangular cross-section is disclosed. The method includes a pressure regulating stage in which pressure is gradually exerted along entire transverse directions of the foamed material to prevent a crowning thereof. The pressure is applied transversely in a plurality of longitudinally discontinuous non-fixed locations.

REFERENCES:
patent: 3208103 (1965-09-01), Voelker
patent: 3240846 (1966-03-01), Voelker
patent: 3243485 (1966-03-01), Griffin
patent: 3354503 (1967-11-01), Joseph et al.
patent: 3553300 (1971-01-01), Buff
patent: 3936518 (1976-02-01), Soda et al.
patent: 3942925 (1976-03-01), Schmitzer et al.

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