JP2013019236A - Vacuum insulation tatami core for thin tatami - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tatami core for a thin tatami using a vacuum insulation material which is thin in thickness and excellent in rigidity and insulation property, in which the periphery of the tatami core can be cut and allows a needle to be used there, and preventing its vacuum sealing from being impaired due to a hole in the vacuum insulation material, without using a special machining method in a process of producing the tatami from the tatami core.SOLUTION: A tatami core is constituted by a tatami backing side cushion layer, a core layer, a rigidity maintaining layer and a tatami surface side cushion layer, where a vacuum insulation material and an outer peripheral core layer which is disposed on the outer side periphery of the vacuum insulation material and can be cut are used for the core layer of the tatami core.

Description

The present invention relates to a vacuum heat-insulated tatami floor for thin tatami mats that can be used in western and barrier-free houses.

In recent years, demand for thin tatami mats with a thickness of less than 30 mm has increased in barrier-free houses and the like corresponding to the Japanese-style and aging flooring rooms.
If you use the tatami floor, which is conventionally used for this thin tatami mat, the insulation board, the polystyrene foam, etc. as it is, the strength and rigidity are not enough. There were problems such as difficult to transport.

In order to solve such a problem, a thin tatami mat is made by laminating a material having high rigidity such as a plywood on one or both sides of the above material.
However, this kind of thin tatami mat has a hard feeling, so it has problems such as poor sitting comfort and uncomfortable feeling when walking.
In addition, there is a process of cutting the edge of the tatami floor with a knife when manufacturing the tatami mat. However, in the case of the tatami floor using the above-mentioned plywood, the production efficiency is lowered due to the plywood being difficult to cut with the knife, and the moisture absorption and absorption of the plywood There was a problem of deformation due to.

By the way, tatami mats are building materials that come into direct contact with human skin, and high heat insulation performance is required. Even if they are thin tatami mats, their performance cannot be deteriorated. In addition, when thin tatami mats are used on a wooden or synthetic resin flooring, an effect for alleviating the cold feel received from the flooring must be added. In addition, the problem of global warming is becoming more serious, and the reduction of carbon dioxide gas in the construction field is urgently required. Even in thin tatami mats used for barrier-free houses, heat insulation performance equivalent to or higher than that of conventional tatami floors is required. ing.

As a method for enhancing the heat insulation performance, a method of using a synthetic resin foam excellent in heat insulation performance for the core layer of a tatami floor for thin tatami mats, and further reducing the foaming ratio of the synthetic resin foam to make the tatami floor thin. Has been proposed. However, in the core layer for thin tatami mats made of a single foam layer, local expansion and contraction of the expansion ratio and non-uniform composition cause non-uniform expansion and contraction due to heat, and the core layer is thin. When used, tatami warp and deformation were likely to occur.

By the way, as a thin-walled heat insulating material superior in heat insulating performance compared to the heat insulating materials introduced above, it has been proposed to apply a vacuum heat insulating material, which has been used in home refrigerators, to the building field.

This vacuum heat insulating material is made of, for example, a core material such as a slab material of ultrafine glass fiber, silica powder, styrene foam, or open cell type hard plastic foam, and a getter agent such as zeolite, nylon, PET, aluminum foil, OPP (Biaxially stretched polypropylene) or the like laminated in a covering material made of at least four layers of dry laminate material, sealed, and the inside of which is sealed under reduced pressure to 0.05 Torr or less, or a plastic film and a metal foil In other covering materials such as those having a laminate film of the above, other core materials such as those having silica powder or glass wool are wrapped and sealed with a vacuum inside, and the like, even if the thickness is about 5 mm Compared with urethane foam insulation, the insulation performance is about 4 to 10 times. Compared with thermal conductivity, hard urethane insulation. There whereas a 22 mW / mK, the vacuum heat insulating material is as small as 2~5mW / mK, in which high heat insulation is obtained.

Although it is a vacuum insulation material with high thermal insulation performance, when applied to the field of construction, there is a high risk of damage to the vacuum insulation material due to the use of nails, needles, etc. at the stage of building construction. It has been difficult to apply thermal insulation to the building field. However, recently, when using a vacuum heat insulating material as a structural element of a heat insulating structure in the building field, a technique for forming a notch in a part of the heat insulating material in order to make it easy to attach to a pillar or a purlin, Techniques for applying the vacuum heat insulating material to the building field, such as a technique of cutting the four rectangular corners of the vacuum heat insulating material and covering the vacuum heat insulating material with a synthetic resin foam for integration, have been proposed.

Utility Model Registration No. 3115091 JP 2000-170359 A JP 2000-170360 A JP 2006-90070 A JP 2010-18968 A

By the way, such a vacuum heat insulating material has little change over time with respect to the heat insulating performance, but there is no problem, but if a situation occurs where a hole is opened in the vacuum heat insulating material and the vacuum sealing is impaired, the heat insulating performance is lost. It is known that there is a problem.

On the other hand, when trying to use a vacuum insulation material with excellent heat insulation performance for a tatami floor, a hole is opened in the vacuum insulation material in the process of making the tatami floor and sewing the tatami floor to the tatami floor. Due to the many dangers, it has been difficult to use vacuum insulation for tatami mats.

The size of the tatami is traditionally different from region to region, for example, 955 mm × 1910 mm between Kyoto, 910 mm × 1820 mm between Chukyo, and 880 mm × 1760 mm between Kanto. According to these traditional tatami mat dimensions, the Japanese Industrial Standard also defines a plurality of dimensions, such as 100 W of 1000 × 2000 mm, 95 W of 950 m × 1900 mm, and 92 W of 920 mm × 1840 mm.

However, the dimensional accuracy of rooms in ordinary houses is not accurate enough to allow standardized tatami mats to be laid in the room as they are, and it has traditionally been a measure to measure the size of the room. As a result, the dimensions of the room in which the tatami is laid are measured in advance, and the standardized tatami floor is cut into dimensions that match the room, and tatami mats have been produced.

Therefore, in the process of making tatami from tatami floor, it is necessary to cut the tatami floor according to the dimensions of the room, and the work of cutting off the tatami floor and the upper and lower front floors with a knife, that is, the periphery of the tatami floor It was common to produce tatami mats that fit the dimensions of the room one by one.

In addition, in the process of lifting the tatami mat on the tatami floor, a waiting needle to stretch the tatami mat on the tatami floor, an edge pulling needle to correct the lining of the tatami mat (the direction of the grass), and a ruler movement to pass through the eyes of the tatami mat. There are processes for inserting various needles from the top of the tatami surface into the tatami floor, such as edge pulling needles for stopping and edge pulling needles for preventing the street in the upper front from moving. In the process of sewing the tatami mat to the tatami floor, there is a process of sewing the rim and the tatami mat to the tatami floor with tatami needles and threads. And the edging needle, the waiting needle, and the tatami needle used above are deeply embedded into the interior of the tatami floor.

In this way, in the process of making tatami from a tatami floor, there is a high risk of opening a hole in the vacuum heat insulating material because there is a work of cutting the peripheral edge of the tatami floor and inserting a needle into the tatami floor. It has been difficult to use vacuum insulation.

The present invention has been made in view of the above problems of the prior art, and is a tatami floor for thin tatami mats using a vacuum heat insulating material having a small thickness and excellent thermal insulation performance, and a tatami mat is manufactured from the tatami floor. It is intended to provide a tatami floor for thin tatami mats without using a special processing method in the process and without opening a hole in the vacuum heat insulating material and impairing the vacuum sealing.

The thin tatami mats using the tatami floor of the present invention are flexible, excellent in rigidity, lightweight and easy to carry, and are not easily warped or deformed. However, when thin tatami mats are used on a wooden or synthetic resin flooring, the cold feel received from the flooring is alleviated, and the entire flooring is used by spreading it over the flooring. In addition, one or several of them are simply placed on the flooring to provide a thin tatami mat that can be used as a so-called lay tatami mat.

The present inventor is a thin tatami mat that is thin and barrier-free while having high heat insulation performance, and can be cut despite using a vacuum heat insulating material. The present invention has been completed by finding a tatami floor that can be used for the processing used.
This inventor is the result of earnestly examining thin tatami mats having heat insulation performance using a vacuum heat insulating material. The structure of the tatami floor using the vacuum heat insulating material that does not hinder the workability as a tatami floor by arranging the outer peripheral core layer that can be cut on the side outer periphery of the vacuum heat insulating material used for the core layer. I found it. Furthermore, by arranging a rigid retention layer between the core layer and the tatami mat side cushion layer, we found that it is thin tatami mat but also has rigidity and cushioning properties, and it has excellent heat insulation performance, rich flexibility, and rigidity The present invention has been completed, which is a tatami floor for thin tatami mats, which is excellent, lightweight and convenient to carry, and is less likely to warp or deform tatami mats and is inexpensive.

That is, the tatami floor of the present invention is
A tatami floor used for thin tatami mats having a vacuum heat insulating material and having an overall thickness of 8 mm or more and less than 30 mm,
The core layer of the tatami floor is composed of an outer peripheral core layer that can be cut and disposed on the outer periphery of the side of the vacuum heat insulating material and the vacuum heat insulating material.
The tatami front side cushion layer is arranged on the tatami front side of the core layer, and the tatami back side cushion layer is arranged on the tatami back side of the core layer,
A rigid holding layer is disposed between the core layer and the tatami front cushion layer.

Here, between the core layer and the tatami front side cushion layer and between the core layer and the tatami back side cushion layer, other cushion layers and other layers may be provided, and the tatami front side cushion layer and the tatami back side cushion layer. As long as the function is not impaired, other cushion layers and other layers may be provided on the tatami front side or the tatami back side of each layer.
In this way, since the outer peripheral core layer that can be cut is arranged on the outer periphery of the side portion of the vacuum heat insulating material, the tatami mat having the outer peripheral core layer in the core layer even though the vacuum heat insulating material is used for the core layer. It is possible to cut the periphery of the floor, and a needle can be used for the periphery of the tatami floor.

In the above, it is preferable that the core layer, the tatami front side cushion layer, the tatami back side cushion layer, and the rigid retaining layer are integrated by adhesion.
Thereby, since each layer is integrated, when processing a tatami floor, workability improves.

Furthermore, in the tatami floor according to the present invention, it is preferable that the rigid retaining layer of the tatami floor described above is a wood fiber board.
With this configuration, in addition to the effects of the tatami floor, the wood fiber absorbs and releases moisture and prevents thermal expansion and contraction of the tatami floor for thin tatami mats. It becomes possible to prevent the generation of gaps and the warping of thin tatami mats during hot weather. Furthermore, the impact force and the like can be absorbed and relaxed, and the fit and sitting comfort during walking can be made equivalent to those of a tatami mat using a conventional tatami floor.

Moreover, it is preferable that the back sheet | seat is further provided in the tatami floor side in the tatami floor in any one of said tatami floors of this invention.
With this configuration, in addition to the effects of the tatami floor, the tatami back side cushion layer can be protected, the tatami back side thread in the sewing of the tatami surface can be retained, and cosmetics, durability, and moisture resistance can be imparted. It becomes possible.

In the tatami floor of the present invention, it is preferable that moisture absorbing / releasing paper or paperboard is disposed on at least the tatami mat side of the tatami mat floor of the tatami floor described above.
With this configuration, in addition to the operational effects of the tatami floor, even a cushion layer without water absorption can be hygroscopic and can prevent stickiness when using tatami mats. become.

The thin tatami mat of the present invention is characterized in that a tatami mat is provided on the most tatami mat side of the tatami floor described above.
With this configuration, the same operational effects as those of the above-described thin tatami floor can be achieved.

The thin tatami mat of the present invention is characterized in that the tatami floor described above is sewn to the tatami surface with a needle and a thread.
With this configuration, the same operational effects as those of the above-described thin tatami floor can be achieved, and the use of an adhesive can be suppressed while maintaining the feel of a traditional tatami mat.

Using the outer peripheral core layer that can be cut and disposed on the outer periphery of the side of the vacuum heat insulating material and the vacuum heat insulating material for the core layer of the tatami floor, the structure of the tatami floor is the tatami floor cushion layer, the core layer, the rigid retaining layer, By using the cushion layer on the tatami surface side, it is possible to cut the peripheral edge of the tatami floor even when using a vacuum heat insulating material excellent in heat insulating performance, and furthermore, a needle can be used at the peripheral edge of the tatami floor. It is possible to produce tatami from a tatami floor in the same way as before, and it is thin and thin tatami mat corresponding to barrier-free, but it has rigidity and cushioning properties, excellent heat insulation performance, flexibility A tatami floor for thin tatami mats that is rich in material, excellent in rigidity, lightweight and convenient to carry, and that is less prone to warping and deformation of tatami mats, and a thin tatami mat using it.

The perspective view of the tatami floor of the present invention BB line sectional view of the tatami floor of the present invention It is a perspective view of the tatami floor of this invention, Comprising: A tatami back side cushion layer and a core layer are illustrated. Sectional drawing explaining the structure of a vacuum heat insulating material Figure showing the tatami floor cutting line The figure which shows the process of fixing a tatami surface to a tatami floor with a needle The perspective view of the thin tatami mat using the tatami floor of the present invention.

Hereinafter, the best mode for carrying out the present invention will be described in the order of materials used and the entire structure.

(Materials used)
As shown in FIG. 1, the tatami floor of the present invention has a tatami back side cushion layer 8, a core layer 7, a rigid retention layer 6, and a tatami front side cushion layer 5 as a basic configuration. The core layer 7 includes a vacuum heat insulating material 11 and an outer peripheral core layer 10.

The vacuum heat insulating material 11 used for the core layer 7 may be any manufacturing method, configuration, etc. as long as it has excellent heat insulating performance and a thickness of less than 30 mm.
As shown in FIG. 4, the vacuum heat insulating material 11 used in the example is composed of a core material 34 and an outer covering material 31. The jacket material 31 has a heat welding portion 33 for sealing the inside under reduced pressure.
Further, the vacuum heat insulating material 11 includes moisture adsorbents such as physical adsorbents such as synthetic zeolite, activated carbon, activated alumina and silica gel, and chemical adsorbents such as oxides and hydroxides of alkali metals and alkaline earth metals. An agent or a gas adsorbent may be enclosed.

Here, the material used for the core material 34 may be a material obtained by processing a porous body having a gas phase ratio of about 90% into a plate shape, and can be used industrially. A known material can be used depending on the intended use and required characteristics.

Among these, as the powder, there are inorganic, organic, and mixtures thereof, and industrially, those mainly composed of dry silica, wet silica, pearlite and the like can be used.
As the foam, open-cell bodies such as urethane foam, styrene foam, and phenol foam can be used.

Moreover, as a fiber body, although there exist inorganic type, organic type, and these mixtures, an inorganic fiber is advantageous from a viewpoint of heat insulation performance. As the inorganic fiber, known materials such as glass wool, glass fiber, alumina fiber, silica alumina fiber, silica fiber, rock wool and the like can be used.

The shape of the core material 34 of the vacuum heat insulating material 11 in the present embodiment is generally a quadrangle, but in the case of a tatami with a special shape, other quadrangular, polygonal, circular, L-shaped, and these Arbitrary shapes consisting of combinations can also be selected.

As the jacket material 31 of the vacuum heat insulating material 11, a material capable of blocking the core material 34 from the outside air is used. For example, it is made of a laminate material having a laminate structure such as a metal foil such as stainless steel, aluminum or iron, or a metal foil and a plastic film.

The laminate material includes at least a surface protective layer, a gas barrier layer, and a heat welding layer 32. As the surface protective layer, a polyethylene terephthalate film, a stretched product of polypropylene film or the like can be used. Furthermore, when a nylon film or the like is provided on the outside, flexibility is improved and durability against bending or the like is improved.

The surface protective layer prevents damage to the surface of the jacket material 31 from dust, dust, etc., friction, bending, and pinhole generation due to piercing into the core member 34 by foreign matter from the outside.

The gas barrier layer prevents air from entering the core member 34 through the surface of the outer jacket material 31. As the gas barrier layer, a metal foil film such as aluminum or a metal vapor deposition film can be used, but more heat is applied. A metal vapor-deposited film is desirable for suppressing leakage and exhibiting excellent heat insulation performance.

Here, the heat welding layer 32 seals the inside of the jacket material 31 under reduced pressure by heating and pressurizing.

Regarding vapor deposition, vapor deposition onto a polyethylene terephthalate film, an ethylene / vinyl alcohol copolymer resin film, a polyethylene naphthalate film, or the like is desirable. Moreover, as the heat welding layer 32, a low density polyethylene film, a high density polyethylene film, an unstretched polyethylene terephthalate film, etc. can be utilized.

The thermal conductivity of the vacuum heat insulating material 11 thus produced is 0.0020 to 0.0035 W / m · K at an average temperature of 24 ° C., which is about 10 times that of a rigid urethane foam that is a general heat insulating material. Insulation performance.

The material of the rigid retaining layer 6 is a material that retains the rigidity for retaining the shape of the tatami floor 2, and in addition, it is easy to cut and the needle is stuck easily, and the needle is retained after being pierced. Any material can be used as long as it can be used. For example, hard board, insulation board, wood fiber board such as MDF, conifer plywood, cork sheet, rubber sheet, synthetic resin sheet, etc. can be used.
A wood fiber board is selected as a particularly preferable material. The wood fiberboard has rigidity as a tatami floor, and even if it is press-fitting of a needle by a human hand, the press-fitting of the needle is easy, it is easy to cut, and it has a homogeneous composition as an industrial product. is there. By the way, even if it is a wood fiber board, if it becomes thick, cutting and needle press-fit become difficult, so if it is a thin tatami mat less than 30 mm as in the present invention, it will be thick if a hard board is used for the wood fiber board. Is preferably 3.0 mm or less.

The material of the tatami front side cushion layer 5 and the tatami back side cushion layer 8 has a cushioning property as a tatami mat, and has performance required for processing as the tatami floor 2, for example, cutting and needle press-fitting are easy and needle holding force. Any type of material may be used as long as the material has the performance described above. For example, it is selected from materials used as a floor base cushion material such as an underlay sheet, synthetic felt, hemp felt, rubber felt, polyethylene felt, rubber hemp composite felt, sponge felt, cork sheet, and foamed polyethylene sheet.

The outer peripheral core layer 10 of the core layer 7 may be made of any kind of material as long as it is a material that is easy to cut and press-fit the needle and has a performance such as a needle holding force. It is more preferable if the material has a compression performance similar to that of the vacuum heat insulating material 11 so that partial compression unevenness does not occur when used as a tatami mat.
For example, underlay sheet, synthetic felt, hemp felt, rubber felt, polyethylene felt, composite felt of rubber hemp, sponge felt, cork sheet, foamed polyethylene sheet, etc. Selected from materials such as wood board, softwood plywood, cork sheet, rubber sheet, and synthetic resin sheet.

(Overall structure)
Hereinafter, a tatami floor made of the vacuum heat insulating material of the present invention and a thin tatami structure will be described with reference to the drawings.

FIG. 1 shows an embodiment of a tatami floor 2 comprising a vacuum heat insulating material 11 of the present invention comprising four layers of a tatami back side cushion layer 8, a core layer 7, a rigid retention layer 6, and a tatami front side cushion layer 5.

As shown in FIG. 2, in this embodiment, the core layer 7 is composed of a vacuum heat insulating material 11 and an outer peripheral core layer 10, and the outer peripheral core layer 10 is an outer periphery of the side portion of the vacuum heat insulating material 11 as shown in FIG. 3. 36 is arranged so as to surround 36. As a result, the core layer 7 of the peripheral edge 18 of the tatami floor 2 is composed of the outer peripheral core layer 10.

Since the rigid retaining layer 6 is disposed on the tatami surface side of the vacuum heat insulating material 11 disposed on the core layer 7, there is a risk of unexpected damage from the tatami surface side, for example, needle-shaped foreign matters and heavy objects in human life. It is possible to avoid the tearing of the jacket 31 of the vacuum heat insulating material 11 due to dropping or impact.

Since the tatami surface side cushion layer 5 is disposed on the tatami surface side of the rigid retention layer 6, the elasticity as a tatami floor is maintained while being a thin tatami mat.

Since the tatami back side cushion layer 8 is disposed on the tatami back side of the core layer 7, the core layer 7 is protected from unevenness and protrusions on the floor and the floor base, and there is a risk of tearing of the jacket 31 of the vacuum heat insulating material 11. To avoid.

In the core layer 7, the outer peripheral core layer 10 is disposed so as to surround the side outer periphery 36 of the vacuum heat insulating material 11, and the outer peripheral core layer 10 forms the core layer 7 of the peripheral edge 18 of the tatami floor 2.
In general, a part of the peripheral edge 18 of the tatami floor 2 is cut in a process of manufacturing a tatami from the tatami floor. In the present invention, the peripheral edge 18 of the tatami floor 2 does not have the vacuum heat insulating material 11, and the peripheral edge 18 is formed by the outer peripheral core layer 10 made of a material that can be cut. It is possible to manufacture a tatami by cutting a part of the peripheral edge 18 of the tatami floor 2 by a manufacturing method.

As described above, the outer peripheral core layer forming the core layer of the peripheral edge 18 of the tatami floor 2 does not damage the vacuum heat insulating material 11 when part of the peripheral edge of the tatami floor 2 is cut. Only a width is required.
FIG. 5 shows cutting lines (lower front floor cutting line C1 and upper front floor cutting line C2, hand heel cutting line D1, hand heel cutting line D2) for cutting the tatami floor to a prescribed size. In FIG. 5, the outer core layer is formed such that the boundary E between the vacuum heat insulating material and the outer core layer is located inside the lower front floor cutting line C1, the upper front floor cutting line C2, the hand punch cutting line D1, and the hand punch cutting line D2. A width 15 is set. In this way, by entering a cutting line in the width 15 of the outer peripheral core layer, it is possible to cut the periphery of the tatami floor manufactured with the standardized dimensions and process the tatami mat into the required dimensions. It becomes possible.

When the layers are joined and integrated, handling as the tatami floor 2 is facilitated, and workability is improved when the tatami floor 2 is processed into a tatami mat. As a method for joining and integrating the layers, it is possible to employ sewing by sewing threads, full adhesion or partial adhesion using an adhesive or an adhesive / adhesive tape, or joining / integration using thermal welding. .

If the sum of the thickness of each layer of the tatami floor 2 is 8 mm or more and less than 30 mm, it is suitably used as a tatami floor for so-called thin tatami mats.
In the present embodiment, the layers of the tatami floor 2 (the tatami back side cushion layer 8, the core layer 7, the rigid retaining layer 6 and the tatami front side cushion layer 5) are sewn together with a sewing thread, or an adhesive or an adhesive / adhesive tape or the like. Are joined and integrated by full adhesion, partial adhesion, or thermal welding, and a tatami mat is sewn on the tatami floor. Moreover, as an intermediate | middle layer which may be interposed between the tatami back side cushion layer 8, the core layer 7, the rigid retention layer 6, and the tatami front side cushion layer 5, in addition to the adhesive layer and the adhesive layer, a foam layer or a resin You may have layers, such as a sheet.

When a back sheet is used to protect the tatami floor side of the tatami floor 2, the tatami back side cushion layer 8 is preferably protected.
Examples of the back sheet include a polypropylene woven cloth sheet made of polypropylene yarn or polypropylene narrow band.

Furthermore, in order to improve the comfortable performance when the tatami mat is used, it is also preferable to dispose moisture absorbing / releasing paper on the tatami floor side and the tatami back side of the tatami floor. In the case of the tatami floor having the moisture absorbing / releasing paper, the moisture absorbing / releasing paper is interposed between the tatami mat and the tatami mat side cushion layer and between the back sheet and the tatami mat back side cushion layer.
As the moisture-absorbing / releasing paper, paper having air permeability and a relatively large surface area such as corrugated cardboard can be used, and when formed with polypropylene resin, a water-impervious moisture-permeable film or sheet can be used. .

After cutting the tatami floor, the tatami floor is lifted up to complete the tatami mat. As shown in FIG. 6, the state of the needle when the tatami mat is lifted on the tatami floor is pierced with an edge needle 28 from the top of the tatami mat 3 to the tatami mat floor 2 to correct the streak of the tatami mat 3, and then The tatami mat 3 is fixed to the tatami floor 2 by inserting the waiting needle 27 into the tatami floor 2 from the top of the tatami mat 3 to the second heel 20. Thereafter, the tatami mat 3 is sewn into the tatami floor 2 with needles and threads.
Since the edging needle 28 used when the tatami surface 3 is stretched on the tatami floor is inserted into the peripheral edge 18 having the outer peripheral core layer as a core layer, the vacuum heat insulating material 11 is not damaged. Further, the width 15 of the outer peripheral core layer is longer than the length of the waiting needle 27 inserted into the heel 20.

As the tatami table 3, it is possible to use woven weed with hemp yarn, synthetic resin such as polypropylene (synthetic weed), and the like.

Examples and the like specifically showing the configuration and effects of the present invention will be described below.

Example 1
4mm thick underlay sheet (Sangetsu Co., Ltd., Underlay NT-4) on the back cushion layer of tatami mat, 4mm thick vacuum heat insulating material (manufactured by Mag Izobale), and core 4 mm thick underlay sheet (Sangetsu Co., Ltd., Underlay NT-4) on the outer peripheral core layer, 1.8 mm thick hard board (Nichiha Co., Ltd. HSY180), tatami front cushion layer A 2.4 mm thick underlay sheet (Tori Co., Ltd. NS Underlay Sheet NSUS) is bonded with Instar Bond (V-6800NA) manufactured by Sumitomo Forestry Crest Co., Ltd., and the thickness is 12.2 mm × 910 mm × 1820 mm. The tatami floor was made. The width of the outer peripheral core layer was 100 mm.
Then, a 3 mm tatami mat was stitched to the tatami floor by a known manufacturing method to produce a 15.2 mm tatami mat.

As a result, in Example 1, the vacuum heat insulating material was not damaged, and the tatami mat could be produced without any problem with stitching the tatami surface to the tatami floor. And when the heat resistance value of Example 1 was measured, the result of 1.53 m <2> * k / W was obtained. The heat resistance compared to a typical 15 mm thick thermal insulation material is 0.39 m 2 · k / W for residential glass wool 24K, 0.55 m 2 · k / W for Class A rigid urethane foam Type 2 No. 4, and Class A phenol The foam was 0.68 m 2 · k / W, and the product of the present invention had good heat insulation performance as a thin tatami mat.

Comparative example

(Comparative Example 1)
4mm thick underlay sheet (Sangetsu Co., Ltd., Underlay NT-4) on the back cushion layer of tatami mat, 4mm thick vacuum heat insulating material (manufactured by Mag Izobale), and core 4 mm thick underlay sheet (Sangetsu Co., Ltd., Underlay NT-4) and rigid retaining layer are not set on the outer peripheral core layer, and 4 mm thick underlay sheet (Sangetsu Co., Ltd.) The underlay NT-4) was bonded with Instar Bond (V-6800NA) manufactured by Sumitomo Forestry Crest Co., Ltd. to produce a tatami floor with a thickness of 12.0 mm × 910 mm × 1820 mm. The width of the outer peripheral core layer was 100 mm.
Then, a 1mm tatami mat was produced by stitching a tatami mat 3mm to the tatami floor to the tatami floor by a known manufacturing method.

As a result, in Comparative Example 1, the vacuum heat insulating material was not damaged, and the tatami floor was sewn to the tatami floor without any problem. It was bent by handling.
When the heat resistance value of Comparative Example 1 was measured, it was 1.38 m 2 · k / W, and the heat insulation performance was good.

(Comparative Example 2)
4mm thick underlay sheet (Sangetsu Co., Ltd., Underlay NT-4) on the back cushion layer of tatami mat, 4mm thick vacuum heat insulating material (manufactured by Mag Izobale), and core 4mm thick underlay sheet (Sangetsu Co., Ltd., underlay NT-4) and rigid retaining layer are not set on the outer peripheral core layer, and 4mm thick small cork sheet (Toa Cork Co., Ltd.) M-1064) manufactured by Sumitomo Forestry Co., Ltd. was bonded with Instar Bond (V-6800NA) manufactured by Sumitomo Forestry Crest Co., Ltd. to produce a tatami floor with a thickness of 12.0 mm × 910 mm × 1820 mm. The width of the outer peripheral core layer was 100 mm.
Then, a 1mm tatami mat was produced by stitching a tatami mat 3mm to the tatami floor to the tatami floor by a known manufacturing method.

As a result, in Comparative Example 2, the vacuum heat insulating material was not damaged, and the tatami floor was sewn to the tatami floor without any problem. It was bent by handling.
When the heat resistance value of Comparative Example 2 was measured, it was 1.52 m 2 · k / W, and the heat insulation performance was good.

Note that the tatami floor and tatami mat of the present invention are not limited to the above-described embodiments, and various changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Thin tatami 2 Tatami floor 3 Tatami surface 4 Tatami edge 5 Tatami front side cushion layer 6 Rigidity retention layer 7 Core layer 8 Tatami back side cushion layer 10 Outer core layer 11 Vacuum heat insulating material 15 Outer core layer width 18 Peripheral part 20 框 27 Waiting needle 28 Edge needle 31 Jacket material 32 Thermal weld layer 33 Thermal weld portion 34 Core material 35 End portion 36 Side periphery C1 Lower front floor cutting line C2 Upper front floor cutting line D1 Hand side cutting line D2 Hand side cutting line E Vacuum insulation Boundary between material and outer core layer

Claims (7)

A tatami floor used for thin tatami mats having a vacuum heat insulating material and having an overall thickness of 8 mm or more and less than 30 mm,
The core layer of the tatami floor is composed of an outer peripheral core layer that can be cut and disposed on the outer periphery of the side of the vacuum heat insulating material and the vacuum heat insulating material.
The tatami front side cushion layer is arranged on the tatami front side of the core layer, and the tatami back side cushion layer is arranged on the tatami back side of the core layer,
A tatami floor, wherein a rigid retaining layer is disposed between the core layer and the tatami front cushion layer. The tatami floor according to claim 1, wherein the core layer, the tatami front side cushion layer, the tatami back side cushion layer, and the rigid retaining layer are integrated by adhesion. The tatami floor according to claim 1, wherein the rigid retaining layer is a wood fiberboard. The tatami floor according to any one of claims 1 to 3, wherein a back sheet is provided on the most back side of the tatami mat. A tatami floor, wherein moisture absorbing / releasing paper or paperboard is disposed on at least the tatami front side of the tatami front side and the back side of the tatami floor according to any one of claims 1 to 4. A thin tatami mat, wherein a tatami mat is provided on the most tatami mat side of the tatami floor according to any one of claims 1 to 5. The thin tatami mat according to claim 6, wherein the tatami mat is sewn to the tatami floor with a needle and a thread.

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