Method of manufacturing a wood-cement board

Details Method of manufacturing a wood-cement board Method of manufacturing a wood-cement board

1996-11-19

1999-01-26

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

264333, 264DIG49, C04B 4000

Patent

active

058634770

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.degree. to 165.degree. C. for 7 to 10 hours.

REFERENCES:
patent: 5188889 (1993-02-01), Nagatomi
patent: 5584895 (1996-12-01), Seike
patent: 5672310 (1997-09-01), Watanabe

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