JP3738792B2 - Bamboo composite board - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a composite board made of bamboo, which is useful for structures, building structural materials, base materials, furniture and the like.
[0002]
[Prior art]
Many such boards are known. For example, Japanese Patent Application Laid-Open No. 7-217055 proposes a board using bamboo materials in order to save resources and deplete wood resources.
[0003]
[Problems to be solved by the invention]
However, a board using bamboo chips has not been put into practical use, and a board formed simply by pressing has a disadvantage that it has a high water absorption and particularly lacks waterproofness. In addition, the bamboo single plate has a disadvantage in that it lacks strength and heat insulation.
[0004]
[Means for Solving the Problems]
In order to eliminate such drawbacks, the present invention forms a chip made mainly of bamboo material into a board shape through an adhesive, and by impregnating this board with asphalt, the waterproofness is greatly improved, In addition, the present invention proposes a composite board made of bamboo that is useful for a structure in which a heat insulating material is sandwiched with this board, a structural material of a building, a base material, furniture, and the like.
[0005]
【Example】
Hereinafter, an embodiment of a bamboo composite board according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing a typical example of the bamboo composite board A, which is a composite board in which a core material 3 is sandwiched integrally with a surface material 1 and a back material 2.
[0006]
As shown in FIG. 2, the surface material 1 and the back surface material 2 are formed by integrally heating bamboo chips 4 with each other via an adhesive (not shown), die pressing, and curing into a board shape.
[0007]
The bamboo chip 4 is formed by cutting, slicing, or the like into chips and forming them into an arbitrary shape. The thickness is about 0.1 to 2 mm, the size is also an arbitrary area, and the structure is finally laminated horizontally. Is. Further, in the production, it is useful to use a high-humidity, high-pressure press, or a high-frequency wave, which is formed through steam and sufficiently subjected to insect repellent treatment and antiseptic treatment.
[0008]
In addition to the bamboo chip 4, it is also possible to form the front surface material 1 and the back surface material 2 by mixing wood chips in an arbitrary ratio. Wood chips are made of firewood, cedar, pine, red pine, ezo, hiba, paulownia, cocoon, boxwood, lauan, china, etc., mainly bulking materials, lightening materials, strength reinforcement materials, adhesion aids It functions as a cost reducing material. Of course, if a waste wood material is used as the wood chip, a low-cost bamboo chip 4 can be formed.
[0009]
Moreover, as an adhesive agent which adhere | attaches bamboo-material chip | tips 4, it consists of 1 or more types of an epoxy resin, a phenol resin, a polyurethane resin, a polyester resin, a vinyl acetate resin etc., and its modified material, for example.
[0010]
Further, in the manufacturing process of the front material 1 and the back material 2, asphalt is impregnated. For example, an adhesive and asphalt are mixed and sprayed on the surface of the bamboo chip 4 to be heated and pressed. Is. By impregnating the surface material 1 and the back surface material 2 with asphalt, the waterproof property is greatly improved, and the bamboo composite board A useful for structures, building structural materials, foundation materials, furniture, etc. can be obtained. It is.
[0011]
The core material 3 is made of various heat insulating materials and is filled between the front surface material 1 and the back surface material 2, and includes a heat insulating material, a bulking material, a weight reducing material, a waterproof material, a fireproof material, an airtight material, and an adhesive. It functions as an agent.
[0012]
Specific examples of the core material 3 include synthetic resin foams such as polyurethane foam, polyisocyanurate foam, styrene foam, vinyl chloride foam, phenol foam, or glass wool, rock wool, gypsum board, wood wool cement board. , A simple substance such as a sizing board and a particle board, an inorganic foam, or a composite or mixture thereof. In addition, one or more of pearlite, ammonium polyphosphate, aluminum hydroxide, graphite, carbon fiber, and the like can be added to the core material 3 to further enhance the flame retardancy.
[0013]
More specifically, when the core material 3 is formed using, for example, a hard polyurethane foam, the stock solution is discharged in a liquid state between the surface material 1 and the back material 2 and reacted, heated, and cured. It is formed integrally by its own self-adhesiveness. Further, when a molded body such as an organic foam board or an inorganic board is used as the core material 3, the surface material 1, the back material 2 and the core material 3 are bonded via an adhesive (not shown). It is formed integrally.
[0014]
[Other examples]
The above description is only one embodiment of the bamboo composite board according to the present invention, and it can be formed as shown in FIGS. That is, FIG. 3 shows the protective layer 5 formed on both surfaces of the front surface material 1 and the back surface material 2 or on either surface. The protective layer 5 is formed by applying a coating film (acrylic, epoxy, polyester, fluororesin, varnish, etc.) or laminating a sheet such as a vinyl chloride sheet or a fluororesin sheet. As well as improving weather resistance, water resistance, corrosion resistance, and weather resistance.
[0015]
FIG. 4 is a view in which a sheet-like material 6 is integrally laminated on the boundary surface between the surface material 1 and the back material 2 and the core material 3. The sheet-like material 6 is, for example, a nonwoven fabric (polyester, nylon, boron, carbon, alumina, silicon carbide, aramid, or short fiber), a synthetic resin sheet (polyurethane, polyethylene terephthalate, polyethylene, Non-foamed or foamed plastic sheets such as polypropylene, nylon, cellophane, EPDM, rubber, etc., or those combined with paper, polyvinyl chloride resin sheets, etc.), fireproof sheets, etc., waterproof, strong, cushioning, fireproof In addition to strengthening, it also functions as a vibration suppression material.
[0016]
FIG. 5 shows another example of the core material 3. A composite board A made of bamboo in which various steel plates, metal foils, papers, sheets and the like are formed in a honeycomb shape, mainly to improve strength and reduce weight. Is to do.
[0017]
FIG. 6A shows another example of the overall shape of the bamboo composite board A, in which notched portions 7 in which the core material 3 is partially absent are formed at both ends of the bamboo composite board A. As shown in FIG. 6 (b), it is an example of a composite board A made of bamboo that can be used as a structural material and a wall base material of a building by arranging the pillar B so as to be sandwiched between the cutout portions 7. .
[0018]
【The invention's effect】
As described above, according to the composite board made of bamboo according to the present invention, (1) because of the large amount of fast-growing 孟 jong bamboo as a material against the depletion of wood resources, resources can be used for a long time at low cost. Can supply. (2) By impregnating with asphalt, the water absorption, which is a weak point of bamboo, can be eliminated, and the waterproofness is greatly improved. (3) By using a composite board, heat insulation and strength are improved. There are features and effects.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a representative example of a bamboo composite board according to the present invention.
FIG. 2 is an explanatory view showing an example of a front surface material and a back surface material used in FIG. 1;
FIG. 3 is an explanatory view showing another example of a bamboo composite board according to the present invention.
FIG. 4 is an explanatory view showing another example of a bamboo composite board according to the present invention.
FIG. 5 is an explanatory view showing another example of a bamboo composite board according to the present invention.
FIG. 6 is an explanatory view showing another example of a bamboo composite board according to the present invention.
[Explanation of symbols]
A Bamboo composite board B Pillar 1 Surface material 2 Back material 3 Core material 4 Bamboo chip 5 Protective layer 6 Sheet-like object 7 Notch

Claims (1)

Chips made mainly of bamboo chips are formed into a board shape via an adhesive, and a core material is sandwiched integrally between face materials impregnated with asphalt on the board, and the core material is made of synthetic resin or Bamboo composite board characterized by being formed from one or more inorganic heat insulating materials.

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