Process for producing non-combustible gypsum board and non-combu

Details Process for producing non-combustible gypsum board and non-combu Process for producing non-combustible gypsum board and non-combu

1985-02-05

1987-02-24

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Plaster board making

106109, 428703, B32B 3106

Patent

active

046455485

ABSTRACT:
A novel process for producing a non-combustible gypsum board and a non-combustible laminated gypsum board having superior practical physical properties, smoothly and efficiently is provided, which process is characterized by preparing a mixture consisting of a powdery gypsum consisting of 50 to 95 parts by weight of a hydrating gypsum and 5 to 50 parts by weight of gypsum dihydrate, a definite amount of fibers and a definite amount of a caking retarder and a necessary amount of water; molding the mixture before the hydrating gypsum is hydrated; and setting and drying the resulting molded material.

REFERENCES:
patent: 3616173 (1971-10-01), Green et al.
patent: 4190455 (1980-02-01), Bijen et al.
patent: 4286994 (1981-09-01), Muller et al.

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