JP2002235428A - Tatami mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tatami mat suitable for a system of circulating type society. SOLUTION: A tatami mat bed 2 is constituted by arranging a biodegradable plastic foam 7 at the center and arranging reinforcing layers 8 formed of insulation boards with wood pieces or vegetable fiber bonded with a biodegradable plastic adhesive, on both upper and lower sides. A tatami mat facing 1 is constituted by arranging a formaldehyde adsorption sheet 6 on the lower side of rush 5 on the surface. Biodegradable plastic is mainly used to constitute this tatami mat, and the biodegradable plastic has a feature decomposed into a carbon dioxide and water in soil or the like. Consequently, even if the whole tatami mat is disposed of by earth filing, a toxic substance hardly remains, and a large decrease of quantity is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tatami mat, and more particularly to a tatami mat that can be easily disposed of after use and has a very low impact on the global environment during the disposal.

[0002]

2. Description of the Related Art A tatami mat is composed of a tatami mat and a tatami floor which is the core of the tatami mat. As a material for tatami mats, rush has been generally used in the past, but at present, alternative materials such as composites of natural materials and plastics and Japanese paper are also used. In the past, the material used to make tatami floors was the so-called straw floor, which consisted of multiple layers of straw material, but 85% of the tatami mats currently on the market are building material floors. The building floor uses no polystyrene foam made of polystyrene resin and a foaming agent, or insulation boards made by compressing fine wood without using any straw. It is light, easy to work, and low in cost.It also has a high rate of use because it has excellent functions in terms of heat insulation, soundproofing, durability, etc., as well as it is difficult for ticks and mold to propagate. Has become. However, environmental problems due to chemical substances such as fungicides and insect repellents have been raised.

[0003]

By the way, although about 14 million used tatami mats are generated annually, most of the used tatami mats are now disposed of, which is a major environmental problem. Has become.

[0004] The reason for the disposal is that it is difficult to separate and sort polystyrene foam, which is a plastic resin mainly used for building material floors. Further, in the case of a tatami mat using a plastic composite material, the sorting process becomes more difficult. Also, in the case of straw floors, plastic strings are usually used as a string material to sew the straw for each layer, and eventually, what is treated as waste is mixed in, so separation processing is performed to remove them. Work is required.

[0005] In disposing of used tatami in this manner, various problems such as a problem of a waste disposal site, a problem of global warming due to generation of CO ₂ at the time of incineration, and a problem of generation of dioxin at the time of incineration must be solved. Therefore, development of a tatami mat that can solve these problems is desired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tatami mat that can effectively deal with the above-mentioned problems and can be applied to a recycling-based society system. It is in.

[0007]

The tatami mat according to the first aspect of the present invention is
The tatami floor is made of a biodegradable plastic foam.

The tatami mat according to the second aspect of the present invention is an insulation board in which a tatami floor is provided with a biodegradable plastic foam at the center and wood pieces or plant fibers are bonded on both upper and lower sides with a biodegradable plastic adhesive. And a reinforcing layer made of

[0009] The tatami mat according to the third aspect of the present invention is characterized in that the tatami mat has a configuration in which a formaldehyde-absorbing sheet is arranged below the surface of the rug.

A tatami mat according to a fourth aspect of the present invention is characterized in that the tatami mat has a structure in which a photocatalyst is arranged on the surface.

[0011] The tatami mat according to the present invention uses a biodegradable plastic foam as a tatami floor, and the biodegradable plastic is characterized by being decomposed into carbon dioxide and water in soil or the like. However, almost no harmful substances remain, and significant weight reduction is possible. In addition, even when incinerated, biodegradable plastics have a heat of combustion and an amount of carbon dioxide gas generated that are 1/3 of those of incinerated ordinary plastics.
And the load on the global environment is extremely low, and there is no generation of dioxin.

A tatami floor with a biodegradable plastic foam placed in the center and reinforcing layers made of an insulation board in which wood chips or plant fibers are bonded with a biodegradable plastic adhesive on both upper and lower sides. In this case, the central biodegradable plastic foam can be reinforced by the upper and lower reinforcing layers, so that a tatami mat having excellent strength can be obtained. In addition, since the reinforcing layers on both the upper and lower sides also function to prevent deterioration of the biodegradable plastic foam in the center, the durability is excellent.

When a tatami mat is provided with a formaldehyde-adsorbing sheet below the rush of the surface, the fact that the tatami mat is laid over a wide area on the floor surface makes use of formaldehyde harmful to the human body. Can be adsorbed using a tatami mat.

Furthermore, when a photocatalyst arranged on the surface is used as the tatami mat, harmful substances can be rendered harmless by the photocatalyst.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross section of a tatami mat T according to the present invention. In the figure, reference numeral 1 denotes a tatami table, and 2 denotes a tatami floor.

The tatami mat 1 comprises a surface rush 5 and a formaldehyde-adsorbing sheet 6 therebelow. For the formaldehyde-adsorbing sheet 6, a material obtained by attaching catechins to a natural material such as cotton is used.
Photocatalytic Japanese paper is one in which a photocatalyst is arranged on the surface as a tatami mat. The photocatalytic Japanese paper has a function of adsorbing harmful substances to the Japanese paper due to the humidity control property of the Japanese paper and detoxifying it with a photocatalyst. As an example of this photocatalytic Japanese paper,
There are ones in which titanium oxide is fixed to fibers of Japanese paper, and ones in which titanium oxide is woven.

The tatami floor 2 is made of a biodegradable plastic foam 7.
Is arranged at the center, and reinforcing layers 8 made of an insulation board in which fine wood chips (chips or sawdust) or plant fibers are bonded with a biodegradable plastic adhesive are arranged on both upper and lower sides.

Examples of the biodegradable plastic used in the present embodiment include various conventionally known biodegradable plastics, for example, those produced by microorganisms containing polyhydroxybutyrate, polylactic acid, polyethylene succinate, and the like. A chemically synthesized system comprising polyvinyl alcohol or the like, or a natural product system comprising cellulose acetate, chitosan, starch or the like can be suitably employed.

The biodegradable plastic foam 7 in the center of the tatami floor 2 of the present embodiment is obtained by foaming the biodegradable plastic as described above about 30 to 40 times. It is molded into an appropriate shape by an appropriate molding means such as press molding. In addition,
It is also possible to further reduce the weight by making a hole of an appropriate size in a predetermined place of the biodegradable plastic foam 7.

Further, as an example of the dimensions relating to the thickness of the tatami mat T of the present embodiment, when the total thickness Ha is set to the same level (50 mm) as a conventional general tatami mat, for example, the thickness Hb of the tatami table 1
Is 5 mm, and the thickness Hc of the reinforcing layer on the upper side of the tatami floor 2 is 10 m.
m, the thickness Hd of the biodegradable plastic foam 7 in the center is 25 mm, and the thickness He of the lower reinforcing layer 8 is 10 mm. Of course, without being limited to this example,
If necessary, the thickness of the necessary member may be increased or decreased.
When the central biodegradable plastic foam 7 itself has a certain strength and durability, the reinforcing layers 8 disposed above and below the central biodegradable plastic foam 7 are not always necessary, and may be omitted. It is also preferable to use a natural material that is not harmful to the human body for the material of the tatami edge (not shown).

The tatami mat T of this embodiment uses a tatami floor 2 mainly composed of a biodegradable plastic foam 7, and this foam molded article has the advantage of being light in weight and requiring less material. On the other hand, there is a disadvantage that the strength is somewhat inferior. However, this disadvantage can be improved by appropriately adjusting the molecular weight of the biodegradable plastic as the raw material, and the strength and durability can be improved by this. Further, in the tatami mat T of the present embodiment, furthermore, on the upper and lower sides of the biodegradable plastic foam 7, an insulating board in which fine wood pieces (chips or sawdust) or plant fibers are bonded with a biodegradable plastic adhesive, respectively. The reinforcing layers 8 are provided, and the reinforcing layers 8 are used to further increase the strength and durability of the tatami floor 2.

The tatami mat T of the present embodiment is mainly made of biodegradable plastic as described above.
The biodegradable plastic is decomposed by microorganisms in the soil over time to become carbon dioxide and water.
Hazardous substances do not remain even when landfilled, and significant reductions are possible. In addition, wood chips and plant fibers mixed in the biodegradable plastic adhesive are also biodegraded together with the biodegradable plastic adhesive, and the rush of Japanese tatami mat 2 and Japanese paper are also biodegraded. Also, in the case of incinerating the tatami mat T, the heat of combustion and the amount of generated carbon dioxide gas are about 1/3 of those in the case of incinerating plastic, so that the load on the global environment is extremely low and no dioxin is generated.

Further, since the tatami mat T of this embodiment is made of a material whose material is biodegradable, it can basically rot and become an organic fertilizer. Therefore, the tatami mat T is crushed without being separated and dismantled. Also, it can be used as a soil improvement material for growing plants. In addition, by utilizing the permeability and water retention of the tatami mat, it is possible to use the tatami mat as a green base material such as a sloping slope.

[0024]

The tatami mat according to the first aspect of the present invention uses a biodegradable plastic foam as a tatami floor, and the biodegradable plastic is characterized by being decomposed into carbon dioxide and water in soil or the like. Even if the tatami mats are landfilled, almost no harmful substances remain, and a significant reduction in weight is possible. Even in the case of incineration, the biodegradable plastic has a heat of combustion and an amount of generated carbon dioxide gas of about 1/3 that of ordinary plastic, and has a remarkably low load on the global environment and does not generate dioxin. After all, it is fully applicable to a recycling-based society system.

The tatami mat according to the second aspect of the present invention is an insulation board in which a tatami mat floor has a biodegradable plastic foam disposed at the center and wood pieces or plant fibers are bonded on both upper and lower sides with a biodegradable plastic adhesive. , And the center biodegradable plastic foam can be reinforced with the upper and lower reinforcing layers, so that a tatami mat having excellent strength can be obtained. In addition, since the reinforcing layers on both the upper and lower sides also function to prevent the degradation of the biodegradable plastic foam in the center, the durability can be improved.

In the tatami mat according to the third aspect of the present invention, since the tatami mat has a configuration in which a formaldehyde-absorbing sheet is disposed below the surface of the rug, the tatami mat is laid over a wide area on the floor surface. It can adsorb formaldehyde that is harmful to the human body, and provide a human-friendly indoor environment.

The tatami mat according to the fourth aspect of the present invention has a structure in which the photocatalyst is disposed on the surface of the tatami mat, so that the harmful substances floating in the room are adsorbed on the washi paper by the humidity control property of the washi paper, and the harmful substances are harmless by the photocatalyst. Harmful substances in the room can be removed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a tatami mat according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tatami table 2 Tatami floor 5 Igusa 6 Formaldehyde adsorption sheet 7 Biodegradable plastic foam 8 Reinforcement layer

Claims (4)

[Claims] 1. The tatami mat according to claim 1, wherein the tatami floor is made of a biodegradable plastic foam. 2. A tatami floor, in which a biodegradable plastic foam is disposed in the center, and reinforcing layers made of an insulation board in which wood pieces or plant fibers are bonded with a biodegradable plastic adhesive are disposed on the upper and lower sides. A tatami mat having a constitution. 3. The tatami mat according to claim 1, wherein the tatami mat has a configuration in which a formaldehyde-absorbing sheet is arranged below the surface of the rug. 4. The tatami mat according to claim 1, wherein the tatami mat has a structure in which a photocatalyst is arranged on a surface.