Inorganic board and method of manufacture thereof
AssigneeNichiha Corporation
InventorsWakatsu Nagatomi, Kazuhiko Takai
Life of this patent
Estimating the term…
Abstract
An inorganic board having excellent dimensional stability and excellent insulating properties comprises a pair of surface layers consisting of a hardened mixture of 30 to 60% by weight of cement, 30 to 60% by weight of a silica-containing material, 0 to 15% by weight of pearlite and 5 to 25% by weight of flake and/or wood powder, and a porous core layer consisting of a hardened mixture of 30 to 60% by weight of cement, 30 to 60% by weight of a silica-containing material, 0 to 15% by weight of pearlite and 5 to 25% by weight of wood-fiber bundle.
Claims3
An inorganic board comprising a pair of surface layers consisting of a hardened mixture of 30 to 60% by weight of cement, 30 to 60% by weight of a silica-containing material, 0 to 15% by weight of pearlite and 5 to 25% by weight of a reinforcing material selected from the group consisting of wood flake and wood powder;
- and a porous core layer consisting of a hardened mixture of 30 to 60% by weight of cement, 30 to 60% by weight of silica-containing material, 0 to 15% by weight of pearlite, 5 to 25% by weight of wood-fiber bundle, and 0.5 to 5% by weight of expandable plastic beads.
Dependencies are inferred from the claim text.