JP2010019022A - Synthetic tatami mat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic tatami mat which can prevent contraction of the dimension thereof over a long period, is proof against warpage caused by influence of moisture, temperature, etc., robust and longwearing, exerts excellent durability, and holds a stable posture for all time. <P>SOLUTION: The synthetic tatami mat has: a foamed plastic core 1; a protective material 4 covering a front surface of the core 1; a tatami mat surface 7 arranged on a front surface of the protective layer 4; and a rear surface material 5 arranged on a rear surface of the core 1. The synthetic tatami mat is characterized in that a reinforcing material made of a grass fiber press board, a polyester fiber fused board, plywood consisting of veneers, etc. is interposed at least in one of gaps between the core 1 and the protective material 4 and between the core 1 and the rear surface material 5. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a synthetic tatami mat that can be reduced in weight by using a core material made of foamed plastic and can prevent a change in size over time.

  In recent years, the number of highly airtight and highly insulated houses has increased, and building materials are required to have functions such as airtightness, heat insulation, and waterproofness. As a tatami mat for meeting this demand, there is a synthetic tatami mat using a core material made of foamed plastic. This synthetic tatami mat is lightweight and convenient to carry, does not escape room temperature, and can prevent cooling from under the floor. Therefore, it has the advantage that a comfortable house that is cool in summer and warm in winter can be realized.

  However, in synthetic tatami mats in which foamed plastic is used as the core material, for example, when a furniture leg or the like is placed, sinking occurs partially, making restoration difficult, and so-called sag is likely to occur. In addition, when used for a long period of time, there are problems that the vertical and horizontal dimensional accuracy may be distorted due to aging, and that warpage may occur due to humidity.

  On the other hand, in synthetic tatami mats used in highly airtight and highly heat-insulated houses, for example, as disclosed in Patent Document 1, as a core material, a plate-like material such as a wooden board, an inorganic board, and a honeycomb core Known to use the body.

However, when such a material is used as the core material, weight reduction may not be achieved, and heat insulation is not sufficient.
In addition, since the moisture-proof and heat-insulating properties are low, there is a problem that the need for a highly air-tight and highly heat-insulating housing cannot be fully met.
JP 11-336307 A

  The present invention has been made in view of the above circumstances, is lightweight and easy to carry, has excellent moisture and heat insulation properties, and can prevent dimensional shrinkage over a long period of time. Providing a composite tatami mat that is durable and long-lasting, has excellent durability, can maintain a stable posture indefinitely, and is suitable for the needs of highly airtight and highly insulated houses. It is aimed.

  Furthermore, an object of the present invention is to provide a synthetic tatami mat that can suppress sagging.

In order to achieve the above object, the synthetic tatami mat according to the present invention includes a foamed plastic core material, a protective material covering the surface side of the core material, a tatami table arranged on the surface side of the protective material, and the core. Having a back material disposed on the back side of the material,
Between at least one of the core material and the protective material and between the core material and the back surface material, a reinforcing material made of plywood such as a glass fiber press board, a polyester fiber fusion board, or a veneer board is interposed. It is characterized by being.

According to such synthetic tatami mats, the force is transmitted to the core material made of foamed plastic via a reinforcing material made of plywood such as glass fiber press board, polyester fiber fusion board, veneer board, etc., so the overall strength Can be reinforced. Moreover, the shrinkability of a core material can be supplemented.

  Further, the occurrence of warpage can be reduced as much as possible by providing reinforcing materials on both sides of the core material so that the front and back surfaces are substantially symmetrical. Moreover, you may interpose a reinforcing material in the intermediate part of a core material. Further, the thickness of the reinforcing material may be changed between the front side and the back side. That is, the arrangement position and number of reinforcing materials can be appropriately adjusted according to the thickness and strength of the foamed plastic used as the core material, or the material and strength used as the protective material and the back material.

In addition, if the said reinforcing material is interposed between the said core material and the said protective material at least, the settling by furniture etc. can be suppressed.
Moreover, it is preferable that the said tatami surface, the said protective material, the said reinforcing material, the said core material, and the said back surface material are integrated by sewing with a vinylon thread | yarn or a polypropylene thread | yarn.

  In this way, by integrating the tatami constituent members by sewing, unlike the case where they are fixed with an adhesive, each constituent element can be moved up and down, so that the occurrence of warpage can be prevented. .

Moreover, it is preferable that the said protective material is a polyester nonwoven fabric.
Further, the back material is preferably a polyethylene tape yarn in which crust paper is bonded.

  According to the synthetic tatami mat according to the present invention, shrinkage and warpage are prevented and dimensional stability is maintained over a long period of time by the action of a reinforcing material such as a glass fiber press board, a polyester fiber fusion board, and a plywood. can do. In addition, since it does not absorb water or absorbs moisture, it is optimal for a highly airtight and highly heat-insulated house, and any thickness of tatami mat can be provided by adjusting the thickness of the core appropriately. Furthermore, it is easy to carry and has excellent workability.

Hereinafter, the synthetic tatami mat according to the present invention will be described with reference to the drawings.
FIG. 1 is a partial longitudinal sectional view of a synthetic tatami mat A which is an embodiment of the present invention. The synthetic tatami mat A has a core material 1 formed by molding a foamed plastic into a plate shape having a thickness of 10 mm to 60 mm, for example. Examples of the foamed plastic include those obtained by foaming thermoplastic plastics such as polystyrene, polyethylene, polypropylene, polyvinyl chloride, rigid polyurethane, and phenol resin at an appropriate magnification. Among these, it is preferable to use the trade name Kanelite Foam (manufactured by Kaneka Corporation), which is a polystyrene foam. This foam has excellent heat insulation performance, almost no water absorption / moisture retention, does not contain chlorofluorocarbon or formaldehyde, has good machinability, has compressive strength and bending strength, and is amazing It is effective as a core material for synthetic tatami mats because of its stickiness.

Further, reinforcing members 2 and 3 of about 3 mm to 10 mm are installed on the front surface side and the back surface side of the core material 1.
Examples of the reinforcing plate include glass fiber press boards 2 and 3 in which glass fiber is mixed with polypropylene. The glass fiber press boards 2 and 3 are mixed plates widely used for automobile interior parts and the like, and are commercially available, for example, as trade name GF-PP press board from Nakagawa Sangyo Co., Ltd. Such glass fiber pressboards 2 and 3 have advantages such as excellent tensile strength, excellent heat resistance, flame resistance, resistance to chemicals, good electrical insulation, low moisture absorption, and excellent sound absorption. There is.

In addition, instead of the glass fiber press board, a plywood such as a polyester fiber fusion board or a plywood board can be adopted as the reinforcing material.
A sheet-like protective material 4 is provided on the upper side of the reinforcing material 2. This protective material 4 is set to a thickness of about 1 to 3 mm by a polyester nonwoven fabric or a polypropylene nonwoven fabric that can protect the tatami front and back surfaces and the reinforcing material. The surface side of the protective material 4 is covered with a tatami surface 7 made of rush of about 3 mm.

  On the other hand, a back material 5 is provided on the bottom surface of the reinforcing material 3 on the back surface side of the core material 1, that is, on the lower side in the drawing. This back material 5 can be composed of a polyolefin cloth, a nonwoven fabric or the like, and among them, a polyethylene tape yarn bonded with kraft paper can be preferably used.

  Then, the tatami mat 7, the protective material 4, the reinforcing material 2, the core material 1, the reinforcing material 3, and the back surface material 5 are stitched and fixed together with a sewing thread (not shown) to constitute a composite tatami A. As the sewing thread, a vinylon type or polypropylene type thread is used.

  When the synthetic tatami mat A having the above configuration is laid on the floor, when a load is applied to the synthetic tatami mat A from the upper side, the load is transmitted to the core material 1 via the upper reinforcing material 2 and further on the lower side. Since it is transmitted to the reinforcing material 3, the load is absorbed by these reinforcing materials 2, 3 to prevent settling and can withstand long-term use. In addition, since the front and back surfaces of the core material 1 are covered with the reinforcing materials 2 and 3 that do not absorb moisture, expansion and contraction can be prevented and warpage can be prevented.

Although the synthetic tatami mat A according to one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
For example, in the synthetic tatami mat A, the reinforcing materials 2 and 3 are provided on the upper side and the lower side, respectively, but the present invention is not limited to this, and the reinforcing material may be installed on at least one of the upper side and the lower side. . Further, from the viewpoint of suppressing sag due to furniture or the like, it is preferable that the reinforcing material 2 is installed between the core material 1 and the reinforcing material 4 like the synthetic tatami mat B shown in FIG.

Further, the thicknesses of the upper and lower reinforcing members 2 and 3 do not have to be the same, and can be adjusted as appropriate.
FIG. 3 is a partial longitudinal sectional view showing a synthetic tatami mat C which is still another embodiment. The synthetic tatami mat C has a central core material separated into two core materials 1a and 1b, and a reinforcing material 6 is provided therebetween. That is, the reinforcing material 6 made of a glass fiber press board is interposed between the two core materials 1a and 1b. Other configurations are the same as those of the synthetic tatami mat A in FIG. In such synthetic tatami mat C, the load applied from above is transmitted to the reinforcing material 6 having a different composition through the core material 1a, and the load is further reinforced without moisture absorption through the lower core material 1b. Since it is transmitted to the material 3, the cushioning property is further improved and the position of the dimensional accuracy is maintained. If it is this synthetic | combination tatami C, the effect similar to or more than the synthetic | combination tatami A can be anticipated.

  Further, in the synthetic tatami mat of the present invention, no adhesive is interposed between the upper and lower layers, and all are integrated with the sewing thread. Even if you step on, the hardness is uniform.

  Furthermore, since the synthetic tatami mat of the present invention uses a material having almost no water absorption and moisture retention, there is no room for water, which is a major enemy of heat insulation, and it is possible to prevent deterioration of heat insulation performance.

FIG. 1 is a sectional view of a synthetic tatami mat according to an embodiment of the present invention. FIG. 2 is a sectional view of a synthetic tatami mat according to another embodiment of the present invention. FIG. 3 is a cross-sectional view of a synthetic tatami mat according to still another embodiment of the present invention.

Explanation of symbols

1, 1a, 1b Core material 2, 3, 6 Reinforcement material 4 Protection material 5 Back surface material 7 Tatami mat A, B, C Synthetic tatami mat

Claims (3)

A core material made of foamed plastic, a protective material covering the surface side of the core material, a tatami table arranged on the surface side of the protective material, and a back material arranged on the back side of the core material,
Between at least one of the core material and the protective material and between the core material and the back surface material, a reinforcing material made of plywood such as a glass fiber press board, a polyester fiber fusion board, or a veneer board is interposed. Synthetic tatami mats characterized by   The synthetic tatami mat according to claim 1, wherein the reinforcing material is interposed at least between the core material and the protective material.   The said tatami surface, the said protective material, the said reinforcing material, the said core material, and the said back surface material are integrated by sewing by a vinylon thread | yarn or a polypropylene thread | yarn, The 1 or 2 characterized by the above-mentioned. Synthetic tatami mats.

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