Method of manufacturing insulating board

Details Method of manufacturing insulating board Method of manufacturing insulating board

1977-11-01

1978-09-12

Corbin, Arthur L.

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

100 38, 100 93P, 162206, 162225, 264113, D21F 1108, D21J 104, D21J 120

Patent

active

041135547

ABSTRACT:
A high density insulating board is produced by a process which includes forming a wet multi-ply board of fibrous material, substantially free of resin, on the roll of a wet cylinder machine, drying the board, placing the dry board in a press, and then hot pressing the board at a differential temperature of about 15.degree. to about 40.degree. F across the board for at least 30 seconds.

REFERENCES:
patent: 1172244 (1916-02-01), Abbott
patent: 2802403 (1957-08-01), Boehm
patent: 2924548 (1960-02-01), Cotton
patent: 3021244 (1962-02-01), Meiler
patent: 3054717 (1962-09-01), Turner
patent: 3056718 (1962-10-01), Grissom et al.
patent: 3367828 (1968-02-01), Carter et al.
patent: 3468755 (1969-09-01), Culp
patent: 3779860 (1973-12-01), Oshida

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