Wood-cement board product

Details Wood-cement board product Wood-cement board product

1998-04-22

1999-12-14

Derrington, James

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106692, 106705, 106707, 106708, 106709, 106805, C04B 1200

Patent

active

060011696

ABSTRACT:
A wood-cement board is manufactured by a method comprising mixing 30 to 40% by weight of cement material, 20 to 27% by weight of wood flake, and 30 to 40% by weight of fly ash to prepare a raw material mixture, strewing said raw material mixture on a mold panel to form a mat, pressing and pre-curing said mat with moisture, and main-curing said pre-cured mat in an autoclave. Preferably the particle size of said fly ash is selected so that less than 10% by weight of fly ash may remain on the sieve whose opening size is 150 .mu.m and said main-curing process is carried out at a temperature of the saturated aqueous vapor in a range between 140 to 165.degree. C. for 7 to 10 hours.

REFERENCES:
patent: 3972972 (1976-08-01), Yano
patent: 4047962 (1977-09-01), Copeland
patent: 5188889 (1993-02-01), Nagatomi et al.
patent: 5482550 (1996-01-01), Strait
patent: 5534058 (1996-07-01), Strabala
patent: 5584895 (1996-12-01), Seike et al.
patent: 5672310 (1997-09-01), Watanabe

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