# US 5,705,001 A · Method of manufacturing wood based panels

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- Number: US 5,705,001 A
- Document ID: US5705001A
- Status: Granted
- Kind: A
- Application number: 08/732,583
- Filed: 1996-10-15
- Granted: 1998-01-06
- Earliest claimed: 1992-03-31
- Assignees: Yamaha Corporation
- Inventors: Ritsuo Iwata; Hirotoshi Takahashi; Satoshi Suzuki; Shiro Hanao
- Web page: https://patentgrep.com/patent/US5705001A

## CPC

- B27N 3/005: {and foam}
- B27N 3/04: from fibres
- B27N 9/00: Arrangements for fireproofing (fireproofing materials C09K21/00)
- E04C 2/16: of fibres, chips, vegetable stems, or the like
- 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)}
- Y10S 428/92: Fire or heat protection feature
- Y10S 428/921: Fire or flameproofing
- Y10T 428/24992: Density or compression of components
- Y10T 428/31703: Next to cellulosic
- Y10T 428/31884: Regenerated or modified cellulose
- Y10T 428/31888: Addition polymer of hydrocarbon[s] only
- Y10T 428/31913: Monoolefin polymer
- Y10T 428/31942: Of aldehyde or ketone condensation product
- Y10T 428/31982: Wood or paper
- B27N: MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL (containing cementitious material B28B; shaping of substances in a plastic state B29C; fibreboards made from fibrous suspensions D21J; drying F26B17/00)
- E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S)
- E04F: FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS (windows, doors E06B)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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

### Claim 1

A method of manufacturing a wood based panel comprising the steps of:
mixing wood fibers, an inorganic cellular material, and a flame retardant, wherein the mixture proportions per 100 parts by weight of said wood fibers being at least 50 parts by weight of said inorganic cellular material, and 15 parts to 60 parts by weight of said flame retardant;
applying a binder to the mixture; and
subsequently hot press forming the mixture to form the wood based panel,
wherein the wood fibers are a major component and the steps are carried out so that the wood based panel possesses a density of 0.27 g.multidot.cm.sup.-3 or less.

### Claim 2 (depends on 1)

The method of manufacturing a wood based panel of claim 1, wherein the flame retardant is added at the step of mixing the wood fibers and the inorganic cellular material.