JPH0664097A - Wood-based panel material - Google Patents

Abstract

PURPOSE:To improve rigidity of a surface, to provide strong toughness, a reduction in weight and to improve processability, adsorption and incombustibility by laminating to integrate a core having wooden fiber, fine foams, flame retardant, organic binder and a surface layer having wooden fiber, inorganic filler, flame retardant and organic binder. CONSTITUTION:A core is formed of substance formed of wooden fiber obtained by chipping wood of yezo spruce, white fir, Japanese cypress, etc., and boiling it by high pressure vapor, silicon oxide, aluminum oxide as main ingredients, particles having fine independent foams present therein, flame retardant such as triphenylphosphate, etc., and organic binder for bonding them such as urethane resin, urea resin, etc. A surface layer is formed by mixing wooden fiber, inorganic filler such as aluminum hydroxide, calcium carbonate, etc., flame retardant, organic binder, mixing them, preliminarily molding it, heating, pressurizing it, and molding it. The core and the surface layer are individually heated, pressurized and molded, then laminated, adhered and integrally molded to be laminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has a wooden texture, is lightweight and tough, has excellent sound absorption and processability, and is semi-inflammable.
The present invention relates to a wood panel material that can be used as a ceiling material, a wall material, and the like.

[0002]

2. Description of the Related Art Various types of panel materials conventionally used as ceiling materials and wall materials have been sold. For example,
(A) A material mainly composed of rock wool, (b) a mixed panel made of aluminum hydroxide, glass fiber, phenolic resin, etc., (c) a calcium silicate plate,
Gypsum board and the like (d) General wood board, plywood, particle board, fiber board, and the like mainly made of wood, and the like.

In such a conventional panel material,
The rock wool (a) is mainly nonflammable and has a sound absorbing property, but has a specific gravity of about 0.4, has no wood texture, is easily broken when bent, and has low rigidity and workability. The product (b) made of aluminum hydroxide, glass fiber, and phenol resin has a large specific gravity of about 0.45, has no wood texture, is inferior in sound absorption, and is expensive. In addition, the specific gravity of (c) is as large as about 0.7, and the sound is reflected and there is no sound absorption. In the case of (d), wood is used, which is tough and has a woody feel, but since it is flammable, its use is limited by interior restrictions, and its specific gravity is large.

[0004]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to have a wood texture, a high surface rigidity, a light weight and toughness, excellent sound absorption and workability, and a semi-combustible wall material. And to obtain a wood panel material suitable as a ceiling material.

[0005]

[Means for Solving the Problems] Such a problem is that a wood fiber obtained by defibrating wood, inorganic microcellular granules, a core portion composed of a flame retardant and an organic binder that binds these, and a wood material. A solution is to provide a wood panel material by integrally laminating fibers, an inorganic filler, a flame retardant, and a surface layer portion composed of an organic binder that binds these. In this wood panel material, the mixing ratio of each material of the core is
10 parts by weight of inorganic microcellular granules per 100 parts by weight of wood panel
The mixing ratio is 0 to 600 parts by weight, the flame retardant is 5 to 60 parts by weight, and the organic binder is 10 to 200 parts by weight. The mixing ratio of each material of the surface layer part is 100 parts by weight of the wood panel and the inorganic filler is It is preferable that the mixing ratio is 20 to 60 parts by weight, the flame retardant is 5 to 60 parts by weight, and the organic binder is 10 to 200 parts by weight. Further, in this wood panel material, the thickness of the surface layer portion is preferably 0.8 to 3.0 mm.

The present invention will be described in detail below. Examples of the wood used as the raw material of the wood fiber used in the wood panel material of the present invention include conifers such as Ezo pine, Todo pine, cypress, cedar and spruce, and broad-leaved trees such as beech, nara, birch and maple. To be A method is used in which these woods are made into chips, steamed with high-pressure steam, and then defibrated by a refiner. The fiber is dried and, if necessary, classified and used.

The inorganic micro-celled granules used in the core of the wood panel material of the present invention are particles in which inorganic oxides such as silicon oxide and aluminum oxide are the main components, and micro closed cells are present therein. The body has a bulk specific gravity of 0.05 to
It is lightweight at about 0.25, has a melting temperature of 1200 ° C or higher, is highly fire resistant, and has a thermal conductivity of 0.036 to 0.05.
It has good thermal insulation with kcal / m · h · ° C and is chemically stable. For example, pearlite, which is obtained by rapidly heating and expanding the crushed particles of natural volcanic glass pearlite or pinelite, and the like. The thing, volcanic ash, or zonolite type calcium silicate powder is used.

As the inorganic filler used in the surface layer,
Any of those generally used as an inorganic filler can be used. Examples thereof include aluminum hydroxide, calcium carbonate, marble powder, clay, diatomaceous earth, silica sand and the like. In particular, aluminum hydroxide or the like, which itself has a flame retarding effect, is preferable.

The flame retardant used in the present invention is not particularly limited, but for example, triphenyl phosphate, tricresyl phosphate, cresyl phenyl phosphate, tris (halopropyl) phosphate, tris (haloethyl) phosphate, polyphosphate carbamate, etc. Phosphate flame retardants, chlorinated paraffin, chlorinated polyethylene, perchloropentacyclodecane, hexabromobenzene, decabromodiphenyl ether, tetrabromobisphenol A and its derivatives, halogen-containing organic compounds such as hexabromocyclododecane, Antimony oxide, antimonate, barium metaborate,
Inorganic flame retardants such as zinc borate, aluminum hydroxide, ammonium bromide, tetrabromophthalic anhydride,
Reactive flame retardants such as bromostyrene and vinyl bromide are used, and phosphorus flame retardants and halogen flame retardants are particularly preferable.

The organic binder is not particularly limited as long as it has good adhesiveness to the wood fiber and the inorganic microcellular granules or the inorganic filler, and examples thereof include urethane resin, urea resin and phenol resin. , Melamine resin, epoxy resin, unsaturated polyester resin, aryl resin and the like are used. Among them, urethane resin, phenol resin, or a mixture thereof is preferable. These give the wood panel material proper toughness, rigidity and water resistance.

The wood panel material of the present invention is formed by integrally laminating the core portion and the surface layer portion. Of these, the core portion is formed by adding and mixing inorganic microcellular granules, a flame retardant, and an organic binder to wood fibers, and then preforming and applying heat and pressure. At this time, 100 to 600 parts by weight of inorganic microcellular granules, 5 to 60 parts by weight of flame retardant, and 100 parts by weight of wood fiber,
It is desirable to set the compounding ratio of the organic binder to 5 to 40 parts by weight.

The surface layer portion is formed by adding an inorganic filler, a flame retardant, and an organic binder to wood fibers, mixing them, and then preforming and then applying heat and pressure. At this time, wood fiber 10
It is desirable that the inorganic filler is 20 to 60 parts by weight, the flame retardant is 5 to 60 parts by weight, and the organic binder is 5 to 40 parts by weight with respect to 0 part by weight.

When these are laminated and integrated, the core portion and the surface layer portion may be individually thermocompressed, and the respective molded members may be laminated and adhered to each other for integral molding. However, it is more preferable that each of them is laminated and integrated in the process of preforming, and then this laminated product is heated and pressed to be molded. For example, on the base, first, the composition that forms either the core portion or the surface layer portion is formed into a desired thickness (accumulation / shaping), and then the other composition is formed into the desired thickness. Further, it can be carried out by carrying out laminated papermaking and heating and pressurizing the obtained preform in a hot press (for example, hot press) to integrally form it. In the wood panel material manufactured by such a manufacturing method, the respective fibers are entangled at the interface between the core part and the surface layer part, and both organic binders are united and adhered, so that even if bending stress or shear stress is applied to the interlayer, Does not cause peeling.

The wood panel material of the present invention may be one in which the surface layer portion is laminated and integrated on one surface of the core portion, but it is more preferable that the surface layer portion is laminated and integrated on both surfaces of the core portion. At this time, the compositions of both surface layer portions may be the same or different. In this way, in order to produce a wood panel material having surface layers on both surfaces of the core, for example, a composition for forming the surface layer on the base is first formed into a desired thickness, and then,
The composition for forming the core is laminated and paper-made to a desired thickness, and the composition for forming the surface layer thereon is laminated and paper-made to a desired thickness. It can be produced by heating and pressurizing a preform composed of three layers of the core composition / surface layer composition for integral molding.

At this time, the thickness of the surface layer portion is 0.8 to 3.0.
It is preferably about mm. This thickness is 0.8 mm
When it is less than 3.0 mm, sufficient toughness and rigidity cannot be obtained on the surface of the wood panel material, and when it exceeds 3.0 mm, not only becomes heavy but it becomes difficult to maintain quasi-incombustibility. The thickness of the wood panel material itself of the present invention is not particularly limited, but is 9 to 50.
It is preferably about mm.

The wood panel material of the present invention is not limited to a flat plate-like material, but may be a curved surface-like material, or an embossed or engraved pattern on the surface of the surface layer. Such a concavo-convex pattern can be imparted by, for example, engraving the surface of the mold when the preform is heated and pressed.

The wood panel material of the present invention has a pigment, an insect repellent, an antiseptic / antifungal agent, a water repellent, a core portion, a surface layer portion or both of them.
It may contain additives such as a reinforcing material. These additives can be blended, for example, by adding them to the composition before preforming of each of the core portion and the surface layer portion.

The wood panel material of the present invention as described above has excellent wood texture and toughness due to the high proportion of wood fibers in the composition forming the surface layer. In addition, it has high rigidity because it contains an inorganic filler. Since the core contains a high proportion of inorganic microcellular granules with a low specific gravity and excellent sound absorption,
The wood panel material of the present invention is lightweight and has excellent sound absorption. The surface layer is made thin, the core is made up of a large amount of non-combustible heat insulating material (inorganic microcellular granules) and a small amount of combustible material (wood fiber and organic binder), and both the surface layer and the core Due to the inclusion of the flame retardant, the wood panel material of the present invention is quasi-incombustible despite containing combustible wood fibers. In the wood panel material of the present invention, the highly rigid surface layer portion is formed thinly, and the core portion is dominated by easy-to-cut cellular granules, so the workability is good.

If the amount of the inorganic fine cell granules contained in the core is less than 100 parts by weight, the wood panel material is not sufficiently incombustible, has a large specific gravity, and has a low sound absorbing property. Also, 60
If the amount exceeds 0 parts by weight, the rigidity and toughness decrease. If the inorganic filler contained in the surface layer portion is less than 20 parts by weight, the surface rigidity of the wood panel material is not sufficient, and if it exceeds 60 parts by weight, the wood texture and toughness deteriorate. If the flame retardant is less than 5 parts by weight, the incombustibility is insufficient, and if it exceeds 60 parts by weight, the rigidity is lowered. When the organic binder is less than 10 parts by weight in the core part and less than 5 parts by weight in the surface layer part, the composition is not sufficiently adhered. If the core portion exceeds 200 parts by weight, the specific gravity becomes large, and the sound absorbing property and the nonflammability also decrease. If the surface layer exceeds 40 parts by weight, the wood texture and workability are impaired.

The wood panel material of the present invention as described above has a wood texture and breathability, is tough, has appropriate rigidity, has a low specific gravity of 0.20 to 0.23, and has a sound absorption coefficient. The normal incident sound absorption coefficient is as good as 0.50 to 0.65, the workability is good, and the requirement of quasi-incombustibility is satisfied, so that it can be suitably used as a wall material or a ceiling material.

[0021]

EXAMPLES The present invention will be specifically described below with reference to examples. A wood panel material in which surface layers are laminated and integrated on both surfaces of a core is manufactured. (1) The following materials were mixed in a mixer to obtain a core composition. Wood fiber 100 parts by weight Inorganic microcellular granules (Mitsui Perlite B: Mitsui Kinzoku) 400 parts by weight Organic binder Urethane resin (C-MDI: Sumitomo Chemical Co., Ltd.) 60 parts by weight Phenolic resin (OTE113A: Showa Polymer Co., Ltd.) 15 parts by weight Parts flame retardant (phosphorus compound) 20 parts by weight (2) The following materials were mixed in a mixer to obtain a surface layer composition. Wood fiber 100 parts by weight Inorganic filler (aluminum hydroxide) 40 parts by weight Organic binder Urethane resin (C-MDI) 18 parts by weight Phenolic resin (OTE113A: Showa Polymer Co., Ltd.) 5 parts by weight Flame retardant (phosphorus compound) 20 parts by weight Department

On the smooth hot plate of a hot press machine, the surface layer composition was uniformly sprayed and laminated at a rate of 423 g per 1 m ² . Next, the core composition was uniformly sprayed and laminated on the laminate at a rate of 1,620 g per 1 m ² . Further, the surface layer part composition was uniformly sprayed on the layered product at a rate of 423 g per 1 m ² to obtain a laminated preform composed of three layers of surface layer part / core part / surface layer part. This was pressed to 15 kg / cm ² with a smooth pressure plate and heated at 150 ° C. for 10 minutes.

The resulting wood panel material had a thickness of 9 mm, a core thickness of 6 mm, and a surface layer thickness of 1.5 m.
It was m. The panel had a smooth, hard surface with a wood texture, and the interface between the surface layer and the core was tightly adhered.

Physical properties of this panel were tested and compared with a conventional rock wool ceiling material. The specific gravity was 0.22 (0.39 to 0.43 for rockwool ceiling material). Flexural strength was 17~20kg / cm ² (rock wool ceiling material 8~18kg / cm ^2). The vertical incident sound absorption coefficient was found to be 0.60 according to JIS-A-1405 "Measurement of vertical incident sound coefficient of building material by in-pipe method" and was 0.60 (0.45 for rock wool ceiling material).

Next, a flame retardancy test was conducted based on JIS-A-1321 "Interior material for buildings and flame retardancy test method for construction method". The standard for passing the quasi-noncombustible surface test is Tc: 3.
0 minute or more, Tdθ: 100 or less, CA: 60 or less, afterflame: 30 or less, penetration: none. The result of the test is T
c: 3.0 minutes or more, Tdθ: 37.1, CA: 13.
2, afterflame: 0, penetration: none, and passed as a semi-incombustible material.

It is clear that the wood panel material of the above-mentioned embodiment has a woody feel, is lightweight and has excellent sound absorption, and can be used as a semi-incombustible material.

[0027]

As described above, the wood panel material according to the present invention includes a core portion composed of wood fibers, inorganic microcellular granules, a flame retardant and an organic binder, a wood fiber, an inorganic filler and a flame retardant. As it is made by laminating and integrating the surface layer consisting of organic binder, it has a wood texture, high surface rigidity, toughness and light weight, excellent sound absorption, good workability, and quasi non-combustible. It is sex.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shiro Hanao 10-1 Nakazawa-machi, Hamamatsu City, Shizuoka Prefecture Yamaha Stock Company

Claims (1)

[Claims] 1. A surface layer composed of a wood fiber, an inorganic microcellular granular material, a flame retardant, and a core made of an organic binder that binds them, and a wood fiber, an inorganic filler, a flame retardant, and an organic binder that binds them. A wood panel material characterized by being laminated and integrated with a part.