Method of manufacturing a wood-cement board
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United States of America Patent
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-
Jan 26, 1999
Grant Date -
N/A
app pub date -
Nov 19, 1996
filing date -
May 24, 1996
priority date (Note) -
In Force
status (Latency Note)
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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.
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