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US 5,422,170 AGranted
Wood based panels
AssigneeYamaha Corporation
InventorsRitsuo Iwata, Hirotoshi Takahashi, Satoshi Suzuki, Shiro Hanao
Life of this patent
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Abstract
Wood fiber, inorganic cellular material, flame retardant and an organic binder for binding these materials, are mixed together and hot press formed to give a wood based panel. The resultant panel has a wood like texture, is light weight, has excellent sound absorption properties, and is semi-incombustible, and has a good insulating property for use as a wall or ceiling material.
Claims7
A wood based panel comprising:
- dry wood fiber;
- inorganic cellular material;
- a flame retardant;
- and
- an organic binder for binding the dry wood fiber, the inorganic cellular material and the flame retardant;
- wherein the mixture proportions per 100 parts by weight of said wood fiber are at least 50 parts by weight of said inorganic cellular material and at least 15 parts by weight of said flame retardant, with an overall density which does not exceed 0.3 g/cm.sup.3.
3 more elements
Dependencies are inferred from the claim text.