WOOD CEMENT BOARD
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United States of America Patent
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N/A
Issued Date -
Oct 1, 2009
app pub date -
Jan 9, 2009
filing date -
Mar 31, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is a wood cement board that has a pattern of acute-angled and deep recesses and projections on its surface, and that tends not to cause cracking during a hardening and curing process, a drying process, a transportation process and so on. The wood cement board has a pattern of recesses and projections on its surface, in which the distance from the apex of the projections to the rear face is 9 mm or more, and the distance from the apex of the projections to the base point of the recesses is 2 mm or more, and is equal to or less than half the distance from the apex of the projections to the rear face. The average specific gravity of the wood cement board as a whole, and the specific gravities of the projections and the recesses are each 1.1 or more, and the difference between the specific gravity of the projections and the specific gravity of the recesses is less than 0.1.
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