JPH10115045A - Complex board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a complex board excellent in strength, fire resistance, water proof at a low cost by adhering a bamboo chip to at least one face of the sandwich-structured heat resistant complex board and providing a water and wind proof coating thereon. SOLUTION: A glass or carbon fiber fire resistant sheet 3 is pasted to both sides of a core material formed with a polyurethane plastic foam or an aluminum honeycomb. To at least one face of the fire resistant sheet 3, a pressed bamboo chip 4 is integrally adhered with adhesive 5 such as epoxy resin. The surface is coated with a water and wind proof coating 6 to form a sandwich- structured complex board A. The strength, fire resistance and water proof of the board A are improved and insect proof is also improved by preventing inside dewing. In this way, the complex board excellent in performance can be manufactured at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite board useful as an energy-saving member for buildings and structures in which a bamboo chip is boarded with an adhesive on the front and back surfaces in a sandwich structure.

[0002]

2. Description of the Related Art There are many known boards of this kind. For example, Japanese Unexamined Patent Publication No. 7-217055 proposes boards utilizing bamboo materials in order to save resources and deplete wood resources.

[0003]

However, a board using bamboo chips has not been put to practical use, and a board simply formed by pressing has disadvantages in that it lacks heat insulation, strength and fire resistance. Further, the above board has not taken any measures against water absorption and waterproofness.

[0004]

According to the present invention, in order to eliminate such a drawback, a bamboo chip is integrated with an adhesive, a refractory sheet is interposed in the center of the chip, and a waterproof coating is provided on one surface. A moisture-proof coating is integrally provided on the other surface,
In addition, a core board is interposed between the boards to provide a composite board that can achieve low heat insulation, strength, waterproofness, windproofness, prevention of internal condensation, prevention of destruction of the global environment, and effective use of resources at low cost. Is what you do.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the composite board according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a typical example of the above-mentioned board. A composite board A is a sandwich structure in which a core material 8 is integrally formed between an outer board 1 and an inner board 2.

More specifically, the outer board 1 and the inner board 2 are provided on one side of a refractory sheet 3 as shown in FIG.
Alternatively, it is composed of a bamboo chip 4 bonded and pressed integrally on both sides thereof, an adhesive 5, a coating 6 and a coating 7 provided on one surface, and mainly includes a reinforcing material, a waterproof material, a windproof material, and a fireproof material. It functions as. Its thickness is about 3-10
a mm, a density of about 50~500kg / m ^3.

The refractory sheet 3 is formed of glass fiber, ceramic fiber, carbon fiber, or the like into a mesh, a nonwoven fabric, or a sheet, and at least one surface thereof includes aluminum hydroxide powder (about 10 to 50 microns) and a phenol resin (resole type). ) And at least one of ammonium polyphosphate, graphite powder and pearlite powder are added to form a sheet having a thickness of about 0.5 to 1 mm. The fire-resistant sheet 3 is useful for enhancing fire resistance and strength.

The bamboo chip 4 is obtained by converting Moso bamboo into chips and integrating them with an adhesive 5, for example, an epoxy resin, a phenol resin, a polyurethane resin, a polyester resin, a vinyl acetate resin, or the like, or a modified product thereof. The bamboo chip 4 is obtained by cutting Moso bamboo into an arbitrary shape.
It has a thickness of about 0.1 to 2 mm and a size of an arbitrary area, and is ultimately a horizontally laminated structure. In the production, it is formed by high-humidity, high-pressure pressing, high-frequency, or steam, and is sufficiently subjected to insect repellent treatment.

[0009] The coating 6 is applied and adhered to the surface of the outer board 1, and has mainly waterproof, windproof and air-permeable functions. For example, a synthetic resin paint or film is used. It is applied and stuck together. The thickness is about 20 to 200 microns.

The coating 7 is formed on the surface of the inner board 2 and has a moisture-proof property and a thickness of about 5 to 50 microns to prevent the occurrence of internal condensation.
Examples of the material include synthetic resin and paper coated with resin.

The core material 8 comprises the outer board 1 and the inner board 2
It is interposed integrally between them and is made of, for example, one kind of a plastic foam or a honeycomb as shown in FIG. 3 and has a thickness of about 30 to 200 mm, and is mainly used as a heat insulating material, a raising material, and a reinforcing material. It works.

As the plastic foam, a polyurethane foam, a polyisocyanurate foam, a polystyrene foam, a phenol foam, a polyethylene foam, a urea foam or the like alone, or a graphite foam, calcium silicate, aluminum hydroxide added, mixed, unevenly distributed, etc. It is.

The honeycomb is made of cardboard, aluminum,
It is made of one kind of plastic and has improved soundproofing and improved strength. In addition, in order to improve fire resistance and insect repellency, it is impregnated with ammonium polyphosphate and a well-known insect repellent, coated, and the like.

Next, a water absorption test (JIS-A-1414 (a method of testing the performance of building components (panels) and structural parts thereof)) of the board 1 outside and the board 2 inside the composite board A was performed. At this time, it is assumed that the end surfaces of the outer board 1 and the inner board 2 have been subjected to waterproof treatment. As a comparative example, the coating 6 and the coating 7 are not provided on the outer surfaces of the outer board 1 and the inner board 2 at all. As a result, the composite board A according to the present invention had a weight of 0 g / 100 cm ² and the comparative example had a weight of 100 g / 100 cm ² or more, showing no upper limit.

Further, a fire prevention test (JIS-A-1301)
(Fire prevention test method for wooden part of building)), the present invention passed, while the comparative example failed.
In the present invention, the refractory sheet 3 foamed 30 times to form a carbonized layer, which exhibited fire protection performance. In the present invention, the outer board 1 and the inner board 2 have a thickness of 10 mm,
The density is 50 kg / m ³ , the binder is phenol resin, the core material 8 is cardboard (made of charcoal paper), and the height is 30 mm.

[0016]

Other Embodiments The above is only one embodiment of the composite board A according to the present invention. As shown in FIG. 4A, the core material 8 is smaller than the outer board 1 and the inner board 2. The composite board A may be formed to have a structure in which a connecting member 9 made of wood or the like is interposed in the connecting portion as shown in FIG. 4B.

[0017]

As described above, according to the composite board according to the present invention, since a large amount of Moso bamboo is used as a material for the depletion of wood resources, resources can be supplied for a long time at low cost. Insect damage and water absorption, which are the weak points of bamboo, can be eliminated. By using a composite board, heat insulation and strength can be added and construction can be easily performed. Internal condensation,
Waterproof performance can be greatly improved. Fire resistance can be greatly enhanced. There are features and effects such as.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a typical example of a composite board according to the present invention.

FIG. 2 is a partially cutaway perspective view showing an embodiment of an outer board and an inner board, which are main parts of the composite board according to the present invention.

FIG. 3 is a perspective view showing an example of a core material of the composite board according to the present invention.

FIG. 4 is an explanatory view showing one embodiment in which a heat insulating structure is formed using the composite board according to the present invention.

[Explanation of symbols]

 A Composite board 1 Outer board 2 Inner board 3 Fireproof sheet 4 Bamboo chip 5 Adhesive 6 Coating 7 Coating 8 Core 9 Connecting material

Claims (1)

[Claims] 1. A composite board in which a board is integrally bonded to both sides of a core material, a bamboo material chip is integrally formed on at least one side of the refractory sheet via an adhesive, and the outer surface has waterproof and windproof properties. A composite board comprising: an outer board provided with a coating; and an inner board provided with a moisture-proof coating on the outer surface instead of the coating of the outer board.