Wood based panels

• US 5,422,170 A
• Filed: 03/31/1993
• Issued: 06/06/1995
• Est. Priority Date: 03/31/1992
• Status: Expired due to Term

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Suzuki, Satoshi, Iwata, Ritsuo, Takahashi, Hirotoshi, Hanao, Shiro
• Primary Examiner(s): SLUBY, PATRICIA
• Application Number:
  US08/040,647
• Time in Patent Office: 797 Days
• Field of Search: 428/464, 428/508, 428/509, 428/516, 428/535, 428/524, 428/920, 428/921, 428/218, 428/302
• US Class Current: 428/218
• CPC Class Codes: B27N 3/005 and foam
• CPC Class Codes: B27N 3/04 from fibres
• CPC Class Codes: B27N 9/00 Arrangements for fireproofing fireproofing materials C09K21/00
• CPC Class Codes: E04C 2/16 of fibres, chips, vegetable stems, or the like
• CPC Class Codes: E04F 13/16 of fibres or chips, e.g. bonded with synthetic resins , or with an outer layer of fibres or chips E04F13/0864 takes precedence
• CPC Class Codes: Y10S 428/92 Fire or heat protection feature
• CPC Class Codes: Y10S 428/921 Fire or flameproofing
• CPC Class Codes: Y10T 428/24992 Density or compression of components
• CPC Class Codes: Y10T 428/31703 Next to cellulosic
• CPC Class Codes: Y10T 428/31884 Regenerated or modified cellulose
• CPC Class Codes: Y10T 428/31888 Addition polymer of hydrocarbon[s] only
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/31942 Of aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31982 Wood or paper

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.

Claims

1. 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/cm³.

2. The wood based panel of claim 1, wherein the mixture proportions per 100 parts by weight of wood fiber are, 50 to 400 parts by weight of inorganic cellular material, 15 to 60 pares by weight of flame retardant, and 7 to 150 pares by weight of organic binder for binding these materials.

3. The wood based panel of claim 1, wherein the melting point of the inorganic cellular material is greater than 1200°

C.

4. The wood based panel of claim 3, wherein the thermal conductivity of the inorganic cellular material is within the range from 0.036 to 0.05 kcal/m·

h·

°

C.

5. The wood based panel of claim 1, wherein the organic binder is a phenol resin.

6. A wood based panel according to claim 1, wherein the percentage by weight of inorganic cellular material is greater than the combined percentages by weight of the wood fiber, the flame retardant and the organic binder.

7. A wood based panel according to claim 1, wherein the sound absorption ratio is greater than 0.3.