JP2012001880A - Extremely thin tatami mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extremely thin tatami mat which is not shifted relative to a floor surface even when a person swiftly gets on the tatami mat or gets on the tatami mat in a wheelchair, and to provide the extremely thin tatami mat whose installation position can be easily changed after being installed to the floor surface.SOLUTION: The extremely thin tatami mat 1 comprises a core material 11 and a tatami surface 12 and has a thickness of 3.5-8.5 mm. The extremely thin tatami mat 1 is provided with a removable adhesive layer 13 on the back surface of the tatami mat.

Description

The present invention relates to an ultrathin tatami mat used on a wooden flooring.

Most of the floors in Japanese houses were tatami mats except for the corridors and the boarding of the storage compartments. At present, however, wooden flooring is increasing in order to make the lifestyle Western, barrier-free, and reduce construction costs. Furthermore, wood flooring is increasingly used with the increasing use of wheelchairs in households due to the increase in aging households.

However, there is no resistance to lying directly on the tatami mats or putting the laundry in, but hesitates to lie directly on the flooring.

Therefore, in recent years, a reversible thin tatami (5 to 15 mm) as shown in Patent Document 1 has been proposed. The reversible thin tatami of Patent Document 1 is excellent in that it can be used in both Japanese and Western styles. However, only a very small rubber 6 is used as an anti-slip material, and there is a problem that the tatami slips when riding on the tatami or when riding on a tatami with a wheelchair. .

On the other hand, Patent Document 2 describes a method in which a release paper is provided on the back side of a rug via an adhesive layer, and then the rug is installed on the floor via an aqueous adhesive or the like. The examples describe the use of thin tatami mats as rugs. However, as it is described that the thin tatami mat used here is heavy and bulky, it is still too thick to ride on a wheelchair or the like, and the purpose of barrier-free could not be achieved.

Patent Document 3 discloses a thin tatami mat. In the same document, there is a description that the thickness of the tatami mat is 5 to 10 mm. However, the thin tatami mat of the embodiment has a thickness of 12 mm, and can a thin tatami mat with a thickness less than that be manufactured without warping? Whether it is unknown.

JP 2003-253861 A (FIG. 2, [0017], etc.) JP 2001-193268 A (paragraph [0006] etc.) JP-A-10-317647 (paragraphs [0009], [0026], etc.)

An object of the present invention is to provide an ultra-thin tatami mat that does not cause a deviation from the floor surface even when riding on a tatami mat or on a tatami mat with a wheelchair. Another object of the present invention is to provide an ultra-thin tatami mat that can be easily changed in position after being installed on the floor.

In the present invention, the ultrathin tatami mat having a thickness of 3.5 to 8.5 mm composed of a core material and a tatami surface, and having a releasable adhesive layer on the back surface of the tatami mat, the ultrathin tatami mat is characterized in that Solve the problem.

Since the ultra-thin tatami mat of the present invention has a thickness of 3.5 to 8.5 mm, it is easy to ride on a wheelchair, and there is no fear that a child will trip. The thickness of the ultra-thin tatami is more preferably 3.5 to 5 mm. When the thickness exceeds the above range, there is a problem in that the load on the wheelchair handle increases when riding on the tatami with the wheelchair. Those below 3.5 mm lack cushioning properties and lack comfort.

As an adhesive layer which can be removed again, the adhesive sheet which apply | coated the adhesive to the single side | surface or both surfaces other than an adhesive is mentioned. Since the latter is easier to remove the adhesive layer when removing the adhesive layer from the ultra-thin tatami mat, it is preferable to use the latter.

The base material of said adhesive sheet will not be specifically limited if there exists an intensity | strength of the grade which is not destroyed when peeling a tatami. For example, an olefin resin nonwoven fabric or woven fabric can be used as the substrate.

Examples of the adhesive include acrylic adhesives, rubber adhesives, urethane adhesives, and silicone adhesives. It is preferable to use an acrylic pressure-sensitive adhesive that does not contaminate the wooden flooring surface or destroy the coating of the wooden flooring due to heating by floor heating or a load applied to an ultrathin tatami mat. .

The core material is preferably wrapped so as to wrap the core material before the tatami mats are laminated. Ultra-thin tatami mats are inevitably warped by repeated temperature changes due to underfloor heating or under-floor cooling. The warping of the tatami is due to temperature change, and is due to repeated contraction and expansion accompanying the movement of moisture. Therefore, by wrapping the core material in an air-tight manner, moisture absorption / release of the core material can be prevented and warping can be effectively prevented. The moisture-impermeable film is preferably wrapped tightly in order to prevent warping due to tension. The non-moisture permeable film may be sealed by heat fusion or an adhesive.

Examples of the moisture-impermeable film include those using polyesters such as polyethylene naphthalate and polyethylene terephthalate, and polyolefins such as polyethylene and polypropylene. Moreover, what laminated | stacked said resin on aluminum foil, and what vapor-deposited aluminum can be used conveniently.

The material is not particularly limited as long as it has a necessary and sufficient strength as the non-breathable core material. For example, a fiber board obtained by mixing wood fibers with an adhesive and hot pressing, a synthetic resin board, a cardboard board, and a foam resin board can be used. Examples of the fiber board include an insulation board (low density), a medium density fiber board, and a high density fiber board.

When the above-mentioned non-breathable film is not used, it is preferable to use glass fiber polypropylene as the core material. If glass fiber polypropylene is used, even if the above-mentioned moisture-impermeable film is omitted, no warping occurs. Further, if an artificial non-woven fabric made of synthetic resin or an artificial weed grass made of synthetic resin is used as the tatami surface, the ultra-thin tatami mat can be washed. If the artificial grass is in the form of a pipe, water accumulates inside, so it is preferable to use a solid material.

It is good also as a structure which sticks the reinforcement sheet | seat of the polyester-type resin which applied the hot-melt-adhesive or the thermosetting adhesive to the surface contact | abutted to a tatami back on the back of a tatami. The polyester resin works as a reinforcing layer and can effectively prevent the warping of the ultra-thin tatami mat. When sticking the reinforcement sheet to the back of the tatami mat, apply pressure while heating and stick the reinforcement sheet to the back of the tatami mat. Can do. This can effectively prevent the ultra-thin tatami from warping in a concave shape.

As the reinforcing sheet, a polyester resin sheet, a stretched sheet, a nonwoven fabric, a flat yarn woven fabric, or the like can be used. Polyester is preferable because it has an appropriate shrinkage against heat and can give an appropriate tension to the back of the tatami mat.

Known hot melt adhesives and thermosetting adhesives are used. For example, as the hot melt adhesive, an ethylene vinyl acetate-based, polyolefin-based, polyamide-based, synthetic rubber-based, acrylic-based, polyurethane-based adhesive, or the like can be used. The hot melt adhesive has a lower melting point than that of the polyester resin constituting the reinforcing sheet, so that the reinforcing sheet can be adhered to the back surface of the tatami mat by heating in a short time. As the thermosetting adhesive, it is possible to use an epoxy adhesive, a phenol resin adhesive, a polyimide adhesive, or the like.

The ultra-thin tatami may be configured as a reversible tatami. That is, the core material is composed of two core materials that are divided into upper and lower parts, one core material is laminated with a tatami surface, the other core material is laminated with a raised layer, and the two core materials can be peeled again. It is an ultrathin tatami united with layers. As the adhesive layer, it is possible to use adhesives such as acrylic adhesives, rubber adhesives, urethane adhesives, silicone adhesives, and double-sided tapes coated with these adhesives. By comprising in this way, when one surface is damaged, a tatami surface and a raising surface can be isolate | separated and it can replace | exchange. In the case of reversible tatami mats, the aforementioned reinforcing sheet may be disposed between the core material on the tatami surface and the core material on the raised layer side.

As a tatami mat, both natural and artificial grasses can be used. As the artificial weeds, both paper and synthetic resin can be used. As the raised layer, artificial suede, pile fabric, carpet and the like can be used. The means for laminating the tatami surface and the raised layer is not particularly limited, and may be performed by a known adhesive or stitching. However, when the core material is wrapped with a moisture-impermeable film, an adhesive is used because airtightness is lost when stitched. Since the tatami mat is only adhered to the moisture-impermeable film, the core material is not damaged when the tatami mat is replaced.

The ultra-thin tatami mat of the present invention is attached to a wooden flooring so as to be re-peelable by an adhesive layer. According to the present invention, when the position of the ultra-thin tatami is changed after being pasted, the ultra-thin tatami can be peeled and moved without damaging both the wooden flooring and the ultra-thin tatami. . Moreover, since it sticks with the adhesion layer, even if it gets on with a wheelchair, there is no possibility that an ultra-thin tatami may shift with respect to a wooden flooring. It is very thin and easy to get on.

By wrapping the core material with a moisture-impermeable film, moisture absorption / release of the core material can be prevented, and warping of the ultrathin tatami mat can be effectively prevented.

By configuring the core material with glass fiber polypropylene, it is possible to effectively prevent warping of the ultra-thin tatami mat. Moreover, even if it is washed with water, it can be made into an ultrathin tatami mat that does not warp.

By arranging the reinforcing sheet on the back surface of the ultra-thin tatami mat, the warp of the ultra-thin tatami mat can be effectively prevented.

By integrating the two core materials with a releasable adhesive, when either the raised surface or the tatami surface is damaged, either one can be easily replaced.

(Example 1) which is sectional drawing of the ultra-thin tatami which arranged the peelable adhesive layer on the back surface of the tatami mat. It is sectional drawing of the ultra-thin tatami which arranged the adhesive layer which can be peeled again on the back surface of a tatami, and wrapped the core material with the moisture-impermeable film (Example 2). FIG. 4 is a cross-sectional view of an ultrathin tatami mat in which a tatami surface is laminated on the upper core material and a raised layer is laminated on the lower core material, and the two core materials are integrated with a re-peelable adhesive. Example 4). In the ultra-thin tatami mat of Example 4, it is sectional drawing of the ultra-thin tatami which changed the upper and lower core material into the medium density fiber board, and tightly wrapped this with the moisture-impermeable film (polypropylene) (Example 6). An ultrathin tatami mat with a reinforcing sheet attached to the back of the ultrathin tatami mat (Example 7).

An embodiment of the ultra-thin tatami mat of the present invention will be described with reference to the drawings.

[Example 1]
Example 1 is an ultrathin tatami 1 composed of a core material 11 and a tatami surface 12, and is an ultrathin tatami 1 in which a releasable adhesive layer 13 is disposed on the back surface of the tatami mat (FIG. 1). The ultra-thin tatami mat 1 of this example was 5.5 mm thick. As a tatami mat, a well-known artificial weed grass coated with resin is used. Further, as the core material 11, an insulation board made of wood fiber was used. As the adhesive layer 13, a double-sided tape (Teraoka Seisakusho No. 7221) formed by applying an acrylic resin adhesive on both sides was used.

Since the ultra-thin tatami 1 of Example 1 is about 5.5 mm in thickness, it was able to get on without difficulty by a wheelchair. Moreover, since an acrylic resin-based adhesive is used as the adhesive layer 13 and can be repeatedly applied or peeled off, it is easy to move the ultrathin tatami 1 to a desired position. When peeling the ultrathin tatami 1 from the wooden flooring 2, the coating film of the wooden flooring was not destroyed. In addition, the adhesive did not stick to the wooden flooring 2 or attack the urethane coating on the wooden flooring 2 due to repeated heating / cooling by floor heating or the load of the person on the thin tatami mat. .

[Example 2]
In Example 2, the thickness of the ultrathin tatami mat 1 of Example 1 is changed to 4.0 mm, and the core material 11 (insulation board) is replaced with a non-breathable film 14 (high density polyethylene sheet) having a thickness of 1.0 mm. It is tightly wrapped (FIG. 2). As shown in FIG. 2, the core material 11 was completely covered with a high-density polyethylene sheet so as not to be exposed, and hermetically sealed by heat fusion. A tatami table 12 knitted with synthetic artificial (polyethylene) solid artificial weeds was laminated on the core material 11 thus subjected to warpage prevention. For the adhesive layer 13, a double-sided tape (Teraoka Seisakusho No. 7222) formed by applying an acrylic resin adhesive on both sides was used. Other configurations are the same as those of the first embodiment.

Although the ultra-thin tatami 1 of Example 2 was made thinner than Example 1, since the moisture absorption / release of the core material is prevented by the non-breathable film 14, even if heating / cooling by floor heating is repeated. No warping occurred. In addition, the adhesive sticks to the wooden flooring 2 due to repeated heating / cooling by floor heating and the load of the person on the thin tatami mat, or the urethane coating on the wooden flooring 2 erodes, When peeling from the wooden flooring 2, the urethane coating on the wooden flooring was not destroyed. When peeling the ultrathin tatami 1 from the wooden flooring 2, the coating film of the wooden flooring was not destroyed. Furthermore, since the artificial weeds were made of solid polyethylene and the core material 11 was wrapped, it was possible to wash the water while putting it on the ultrathin tatami 1. Thereafter, no warping occurred. Further, as in Example 1, it was easy to peel off and move the ultrathin tatami 1, and it was easy to get on a wheelchair.

[Example 3]
The thickness of 5.5 mm in Example 1 was changed to 3.5 mm, and the core material 11 was changed to glass fiber polypropylene to obtain the ultrathin tatami 1 of Example 3. Other configurations are the same as those of the first embodiment.

The ultrathin tatami mat 1 of Example 3 was extremely thin and excellent in thermal conductivity, and did not block the heat of floor heating. Further, since glass fiber was added, the warp did not occur even when repeated heating and cooling were repeated despite the thickness being 3.5 mm. Even when the ultra-thin tatami mat 1 of Example 3 was washed with water, warping did not occur thereafter. Furthermore, the ultra-thin tatami 1 can be easily peeled and moved without destroying the urethane coating, and it is easy to get on a wheelchair.

[Example 4]
The fourth embodiment is a reversible ultrathin tatami 1 in which the core 11 of the ultrathin tatami 1 of the first embodiment is divided into upper and lower parts (FIG. 3). One core material 11 (insulation board) is laminated with a tatami table 12 knitted with synthetic artificial polyethylene (polyethylene) solid artificial grass, and the other core material 11 has an artificial suede (stock) as a raised layer 15. Clarino (registered trademark) of the company Kuraray was laminated (FIG. 3). The core material 11 on which the tatami mat 12 is laminated and the core material 11 on which the raised layer 15 is laminated are integrated with a releasable adhesive layer 16 (Teraoka Seisakusho No. 7221). The thickness was 4.0 mm. The same double-sided tape as in Example 1 was used as the adhesive layer 13.

In the ultrathin tatami mat 1 of Example 4, when the surface of the tatami surface 11 was damaged, it was easy to peel off the core material on the tatami surface 11 side and replace it with a new one. Moreover, when raising the surface of the raising layer 15, when peeling the ultra-thin tatami 1 from the wooden flooring 2, it was able to peel without destroying both the wooden flooring 2 and the raising layer 15. Since the thickness is 4.0 mm, it is easy to get on a wheelchair and is fixed by the adhesive layer 13, so that the ultrathin tatami mat 1 was not displaced during the ride. In addition, the adhesive did not stick to the wooden flooring 2 or attack the urethane coating on the wooden flooring 2 due to repeated heating / cooling by floor heating or the load of the person on the thin tatami mat. .

[Example 5]
In Example 5, the upper and lower core members 11 of Example 4 are changed to glass fiber polypropylene. The thickness is 4.0 mm as in Example 4. In addition, the pressure-sensitive adhesive layer 13, the tatami mat surface 12, the raised layer 15, the pressure-sensitive adhesive layer 16, and the like were the same as in Example 4 (FIG. 3).

The ultrathin tatami mat 1 of Example 5 did not warp even after repeated heating and cooling. Furthermore, even if washed with water, the ultrathin tatami 1 did not warp thereafter. Moreover, even if the core material 11 on the tatami surface 12 side was damaged as in Example 4, the tatami surface 12 could be replaced with a new one by peeling off the core material 11. There was no sticking of the adhesive to the wooden flooring 2, and the wooden flooring 2 was not destroyed or attacked.

[Example 6]
Example 6 is the ultrathin tatami mat 1 of Example 4 in which the upper and lower core members 11 are changed to medium density fiber boards, and this is tightly wrapped with a moisture-impermeable film 14 (polypropylene) (FIG. 4). ). As shown in FIG. 4, the core material 11 was completely covered with a high-density polypropylene sheet so as not to be exposed, and hermetically sealed by heat fusion. In addition, the pressure-sensitive adhesive layer 13, the tatami mat surface 12, the raised layer 15, the pressure-sensitive adhesive layer 16, and the like were the same as in Example 4 (FIG. 3).

The ultrathin tatami mat 1 of Example 6 did not warp even after repeated heating and cooling. Furthermore, even if washed with water, the ultrathin tatami 1 did not warp thereafter. Moreover, even if the core material 11 on the tatami surface 12 side was damaged as in Example 5, the tatami surface 12 could be replaced with a new one by peeling off the core material 11. There was no sticking of the adhesive to the wooden flooring 2, and the wooden flooring 2 was not destroyed or attacked.

[Example 7]
In the ultrathin tatami mat of Example 7, a PET non-woven fabric in which low-density polyethylene (melting point: about 110 ° C.) is laminated on the back surface of the ultrathin tatami mat of Example 1 on the back surface of the tatami mat as a reinforcing sheet 18 by hot pressing. The attached ultra-thin tatami 1 (FIG. 5). The reinforcing sheet 18 was heated at 130 ° C. for 30 seconds and attached to the back surface. An adhesive layer 13 similar to that in Example 1 was used on the lower surface of the reinforcing sheet 18. As the adhesive layer 13, a double-sided tape formed by applying the acrylic adhesive of Example 1 on both sides was used.

In the ultrathin tatami mat 1 of Example 7, the reinforcing sheet contracted by hot pressing and had an appropriate tension. The ultra-thin tatami mat 1 of Example 7 did not warp even after repeated heating and cooling.

1 Ultra-thin tatami 11 Core 12 Tatami 13 Adhesive layer (for fixing)
14 Non-breathable film 16 Adhesive layer (for core material)
17 Raised layer 18 Reinforcement sheet 2 Wood flooring

Claims (5)

An ultra-thin tatami mat comprising a core material and a tatami surface and having a thickness of 3.5 to 8.5 mm, and having a releasable adhesive layer on the back surface of the tatami mat. The ultrathin tatami mat according to claim 1, wherein the core material is wrapped with a moisture-impermeable film before the tatami mat is laminated. The ultrathin tatami mat according to claim 1, wherein the core material is a molded body made of glass fiber polypropylene. The ultrathin tatami mat according to claim 1, wherein a reinforcing sheet made of a polyester resin to which a hot melt adhesive or a thermosetting adhesive is applied is attached to a back surface of the tatami mat on a surface that comes into contact with the tatami back surface. The core material is divided into upper and lower parts, a tatami surface is laminated on one core material, a raised layer is laminated on the other core material, and two core materials are integrated with a re-peelable adhesive layer Item 5. The ultrathin tatami mat according to any one of Items 1 to 4.

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