Method of and apparatus for producing gypsum fiber boards (plast

Details Method of and apparatus for producing gypsum fiber boards (plast Method of and apparatus for producing gypsum fiber boards (plast

1985-05-23

1988-03-29

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

162225, 264 82, D21H 378

Patent

active

047341637

ABSTRACT:
A method of and apparatus for producing gypsum fiber boards includes introducing shaped boards provided of a mash of calcium sulphate dihydrate and fibrous material and possibly additives after dewatering and shaping the mash into at least one pressure vessel and to heat the boards at saturated steam atmosphere to 120.degree.-160.degree. C. over a predetermined period. Thereafter, the boards are allowed to cool down within the pressure vessel to a temperature of about 100.degree. or less before being discharged therefrom.

REFERENCES:
patent: 3489583 (1970-01-01), Bloom et al.
patent: 4213931 (1980-07-01), Trutnev et al.

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