JP2588118B2 - Building materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for utilizing charcoal, and more particularly to a technique for producing building materials using charcoal.

[0002]

2. Description of the Related Art Conventionally, charcoal has been used as a filter for fuel or drinking water, or as a printed copper plate or a vehicle abrasive, and has also been used in agricultural and forestry nurseries due to its adsorptive properties.

On the other hand, for building materials such as building panels and flowerbed blocks, wood, synthetic resin, brick, ceramic, concrete, and the like are used in terms of rigidity and cost.

[0004]

By the way, charcoal is a crystal aggregate having a high carbon content by thermally decomposing wood, and emits highly efficient far-infrared rays by heating. Further, it is known that as a result of containing carbon at a high temperature, there is an excellent electromagnetic wave shielding property. In addition, charcoal does not lose the original composition voids of wood as a raw material, and therefore has excellent properties in terms of moisture absorption, heat retention, sound insulation, and the like, and is lightweight.

[0005] However, charcoal is extremely brittle as a result of thermal decomposition of wood, and does not have bending stress or tensile stress required for building materials.

Accordingly, an object of the present invention is to improve the rigidity of charcoal to such an extent that it can be used for building materials.

[0007]

According to the present invention, a building material according to the present invention is capable of carbonizing wood formed into a predetermined shape and injecting a liquid resin out of the composition voids of the charcoal. A resin material is injected into the voids and solidified. In addition, in order to achieve the same object, charcoal powder is formed into a predetermined shape with a thermoplastic resin.

[0008]

In the case where wood formed into a predetermined shape is carbonized and a resin material is injected and solidified in a portion of the composition void of the charcoal into which a liquid resin can be injected, the charcoal is injected into the tissue void. This exerts stress on bending, tension, and compression, and maintains the formed initial shape.

Further, according to the molecular structure of the injected resin,
There is a limit to the amount of resin impregnated into the voids of charcoal tissue,
The minute voids into which the resin cannot enter are left as they are. The charac- teristic properties of charcoal, such as moisture absorption, heat retention, and sound absorption, are retained by these minute voids.

On the other hand, when the charcoal powder is cured with a resin, the number of minute voids is reduced. However, the material of the molded product is a carbon crystal that has been subjected to high heat treatment, so that the far-infrared effect of efficiently releasing the heat of absorption in the form of electromagnetic waves in a specific band is not impaired.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing a production example of a building material according to the present invention. Naturally, the raw material of the building material according to the present invention is wood. However, in the past, charcoal used for fuel and other purposes was classified into certain types of wood, such as conifers such as red pine, fir pine, and larch, and broadleaf trees such as yamazakura, mizume, and ono-kamba because of the processing temperature and the properties of the final product. However, the present invention does not limit the wood used as a raw material. This is because the particle density and the ignition temperature do not matter. Therefore, even wood that has not been used in the past, such as thinned wood, can be reprocessed and used. When thinned wood is used, high-performance building materials can be obtained at extremely low cost.

The wood 1 is formed into a shape according to the purpose of use, and the formed product 2 is carbonized by an appropriate method to obtain a formed charcoal 3. Thereafter, the molded charcoal 3 is impregnated with a resin (4), and the impregnated resin is solidified to obtain a charcoal building material 5.

FIG. 2 shows an example of a processing apparatus for impregnating the resin into the molded charcoal 3. As shown in FIG. In this figure, 1
0 is a surging tank, 12 is an injection case, 14 is a manometer, 16 is a safety bottle, and 18 is a vacuum pump. The molded charcoal 3 is put into an injection case 12, and a resin liquid (monomer) tank 20 is attached to the injection case 12.

The resin impregnation using such a processing apparatus is performed in the following procedure. First, a resin solution to be impregnated into the molded charcoal 3 is, for example, a methyl methacrylate-methanol solution. The methyl methacrylate-methanol solution (MMA) is mixed with a polymerization inhibitor. Also, in order to convert the MMA into a polymer, about 0.5% of benzoyl peroxide (BPO) is added as a curing agent.

Next, the vacuum pump 18 is operated, and the pressure is reduced at a degree of vacuum of 2 to 3 mmHg for about 1 hour.
The resin liquid is caused to penetrate into the tissue gap of the above. After the injection process, the vacuum pump 18 is stopped, and the charcoal is immersed in the solution at atmospheric pressure for one hour. Next, the charcoal is sealed in a metal container or wrapped with aluminum foil (not shown), transferred to a thermostat (not shown), and the impregnated resin is polymerized at an appropriate temperature for an appropriate time. Let it. In the case of methyl methacrylate, it was found that a heat treatment at, for example, 70 ° C. for 48 hours can achieve a hardness as high as expected.

The charcoal building material 5 obtained as a result of such treatment is
Since the polymer resin mainly composed of methyl methacrylate enters into the tissue void and resists bending, tension and compression, it is possible to prevent the collapse of the molded charcoal 3 from shearing.

The charcoal building material 5 thus formed is
Since it is not damaged by a normal external force, it can be used as a wall surface, a floor surface, a ceiling panel, various blocks, and other molded products of a building. The most appropriate way to use the far-infrared emission effect of heating is
It is the inner wall material of the sauna room.

When used as an inner wall material in a sauna room, the charcoal wall panel (5) can promote a sufficient sweating effect by its far-infrared ray effect even when the room is maintained at a relatively low temperature. In a conventional sauna room, the temperature in the sauna room is often set to a high temperature of 90 to 120 ° C. in order to achieve a sweating action in a shorter time. However, such abnormally high temperatures are not healthy for the human body. In order to promote the sweating action, it is desirable to give a heating effect to the cell tissue of the human body at a lower temperature. The charcoal wall material having the far-infrared effect emits a specific region of electromagnetic waves in response to the heat absorbed, and promotes the sweating action at a lower temperature.

Also, charcoal has an excellent effect of shielding electromagnetic waves under normal temperature by its carbon crystal.
Therefore, when such a charcoal inner wall material is used, the indoor space can be protected from various kinds of electromagnetic waves which cannot be avoided in a modern environment. Therefore, for example, in a wide field such as a school, a hospital, a temple, and a general house, it is possible to achieve mental stability by shielding electromagnetic waves. It is also known in recent reports that electromagnetic waves, such as broadcast waves, unconsciously affect the human body and cause mental instability, particularly for residents living near high-voltage lines.

The charcoal wall material has excellent hygroscopicity, soundproofing properties, and heat insulating properties because it does not lose the original tissue void of charcoal. By arranging a breathable decorative base (fabric) on the surface of charcoal wall material,
You can decorate the wall freely, avoiding charcoal-specific black color.

Such a far-infrared effect peculiar to charcoal can be obtained similarly when charcoal powder is solidified with a resin.
For example, this is a case where charcoal powder is formed into a predetermined shape with a thermoplastic resin. In this case, the function of hygroscopicity generated by the fine voids inherent in wood is reduced, and the heat retention is also lost to some extent. However, the far-infrared effect and the electromagnetic wave shielding effect are not impaired, and the shape can be designed and produced arbitrarily.

The range of application of this charcoal is the so-called "building material".
It is not limited to. For example, in a greenhouse cultivation in a cold region, the heating cost after autumn is remarkable. However, if the perimeter of the cultivation garden is protected by the block (or panel material) using the resin solid charcoal, the far infrared effect will allow the plant growth to be reliably maintained even if the temperature in the house is set lower than before. Cold damage can be reliably prevented, and heating costs in winter can be reduced.

In addition, far-infrared rays affect the human body due to the emission of electromagnetic waves, and also cut off radio waves invading from the external environment to relax mind and body. Therefore, for example, when used as an inner wall panel of a school, a hospital, a temple, or a general house, a comfortable environment space can be created. This charcoal molded product may be applied to automobile handles, bicycle handles, school supplies, daily necessities, etc., as long as it retains moisture absorption. The "building material" as used in the present specification is not limited to so-called architectural and civil engineering materials, but also includes various molded products capable of maintaining a shape.

The carbon crystal has a water purifying function as conventionally known. Therefore, it is a matter of course that the molded article according to the present invention may be used as a slope covering panel of a river embankment, a riverbed block, or a marine embankment material.

This charcoal panel can be subjected to an appropriate treatment on its surface, for example, wrapped with a nonwoven fabric, or coated with a waterproof resin. In this case, some functions are impaired depending on the surface treatment, but other functions can be obtained. For example, if the surface is coated with a waterproof resin, the function of absorbing moisture is lost, but the waterproof property can be increased without impairing other functions, and it can be applied in various fields where waterproof property is required. . When a nonwoven fabric is applied, the freedom of design and decoration of the panel can be improved without impairing the function.

[0026]

As described above, according to the present invention, the rigidity of charcoal used for building materials can be improved, and various functions unique to charcoal can be exhibited within the applicable range.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of manufacturing a building material according to the present invention.

FIG. 2 is a view showing an example of an apparatus for impregnating charcoal with resin according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wood 2 Molded object 3 Molded charcoal 5 Charcoal building material 10 Surging tank 12 Injection case 14 Manometer 16 Safety bottle 18 Vacuum pump 20 Resin liquid tank

Claims (2)

(57) [Claims] 1. A building material characterized in that wood formed into a predetermined shape is carbonized and a resin material is injected into solidified portions of the charcoal composition voids into which a liquid resin can be injected and solidified. 2. A building material wherein charcoal powder is formed into a predetermined shape with a thermoplastic resin.