Process for production of large dimension polyester-derived poly

Details Process for production of large dimension polyester-derived poly Process for production of large dimension polyester-derived poly

1978-09-01

1980-04-08

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264216, 264331, 264DIG84, 521163, B29D 2704

Patent

active

041972694

ABSTRACT:
A process is diclosed for the production of large dimension polyester-derived polyurethane foam. A preferred embodiment of the invention is continuous production of polyurethane foam slabs having a height exceeding forty inches. Such heights are obtained through use of a slow-rise foam formulation. Slabs having a substantially rectangular or round cross section can be obtained using segmented inclined pouring boards. The slow-rise formulation is deposited on one inclined segment and moves down it and another segment more steeply inclined to effect the production of both rectangular or round slabs.

REFERENCES:
patent: 3325823 (1967-06-01), Boon
patent: 3734668 (1973-05-01), Porter
patent: 3786122 (1974-01-01), Berg
patent: 3887670 (1975-06-01), Porter
patent: 3916023 (1975-10-01), Porter et al.
patent: 4074960 (1978-02-01), Dockray

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