JP2011127312A - Wooden floor plate containing tree essential oil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a wooden floor plate containing tree essential oil components which can properly and sufficiently transpire the tree essential oil components, which is increased in performances such as pest avoidance action, antibacterial action, and antifungal action, and which is improved in the sustainment of these performances over a long period of time. <P>SOLUTION: This wooden floor plate includes a rear surface coated layer, a substrate, an adhesive agent layer for sheet joining, an underlay sheet, an adhesive agent layer for single plate joining, a decorative single plate, and a surface coating which are arranged in this order from the rear surface of the wooden floor plate. The tree essential oil components are contained in at least the adhesive layer for single plate joining or the underlay sheet among these layers. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a floorboard used for the interior of a building such as a house, and is produced by attaching a single plate or veneer of natural name wood as a decorative material to the surface of a wooden base material with an adhesive via an underlay sheet. Specifically, it is a wooden floor board in which a tree essential oil component is contained in at least the adhesive layer or underlay sheet of the floor board. The present invention relates to a wooden floor board containing a tree essential oil component, in which a tree essential oil component is gradually released from a floor board over a long period of time, and its effect is sustained for a long period of time.

  Conventionally, there has been a great demand for healthy and comfortable living spaces. For this reason, various devices have been made for members used in buildings such as houses. Of course, in the field of furniture, dwelling units and fittings, floor boards, wall materials, Various ideas have also been made for ceiling materials, staircase members, and other interior materials. Also, considering the position of craftsmen, such as carpenters, who are responsible for the construction of parts and parts used in houses, etc., not only are the costs low, but they also require good workability and construction work. The product with excellent construction finish has gained high reputation in the market.

  On the other hand, from the standpoint of the person who uses the product, creating a comfortable and healthy home is a major concern for those who live there. Products that have been researched and developed from the standpoint of residents are also being put on the market. For example, products that are easy to use, excellent in quality, and excellent in strength and long-term durability are preferred. In addition, there are many products that consider the safety of the products, and there are many products that take into account unexpected injuries in furniture, dwelling units, stairs and the like. In addition, in interior materials such as floors and walls of houses, various environmentally friendly adhesives have been developed in order to solve odor problems such as formalin, but they are disadvantageous in that they are expensive.

  On the other hand, in order to pursue a healthy and comfortable life, various effects of essential oil components emanating from natural trees, namely, mite suppression effect, insect repellent effect, antifungal effect, antibacterial effect, Architectural interior members have been proposed for making so-called forest bathing effects, such as the effect of relaxing human mind, appear in the living space. For example, there is a floor board in which a synthetic resin sheet layer is provided between a base plate and a protruding board, and the synthetic resin sheet layer is impregnated with a tree essential oil component (see Patent Document 1). Further, there is a wood grain printed decorative board in which a tree essential oil component is contained in a printing paper adhesive. (See Patent Document 2).

JP-A-5-138816 JP-A-5-004320

  In the above Japanese Patent Laid-Open No. 5-138816, when a veneer used on the surface of the base plate is adhered, an ethylene vinyl acetate copolymer, polyethylene, polypropylene, polyvinyl chloride, etc. It is described that a synthetic resin sheet layer is provided and the synthetic resin sheet layer is impregnated with a pest repellent component so that the insect and fungicidal effects are maintained over a long period of time.

  However, in an actual floorboard manufacturing process, impregnating a synthetic resin sheet layer with a tree essential oil component complicates the floorboard manufacturing process, and the synthetic resin sheet layer is composed of a base plate made of a wooden material and a wooden veneer on the top. A high performance adhesive having good adhesion performance to both the wood material and the synthetic resin material is required. Selecting an inexpensive and high performance adhesive is quite difficult.

  In addition, there are various synthetic resin sheet materials such as ethylene vinyl acetate copolymer, polyethylene, polypropylene, and polyvinyl chloride. Depending on which synthetic resin sheet is selected, it is necessary to select the most suitable adhesive. Not only does advanced production technology be required, but when the type of synthetic resin sheet is changed, it is necessary to re-select the laminating adhesive to a new optimum one. Furthermore, as the type of the synthetic resin sheet is changed, the procedure and method for impregnating the synthetic resin sheet layer with the tree essential oil component are also different, resulting in production technical difficulties and reduced productivity. . This leads to an increase in manufacturing cost and is not realistic.

  Moreover, in the said Unexamined-Japanese-Patent No. 5-004320, the printed decorative board manufactured by sticking the decorative paper on which the wood grain pattern was printed on the base board using the adhesive agent containing a tree essential oil component. In this case, a partially painted portion is formed on the painted surface of the decorative board surface, and the tree essential oil component is gradually emitted from the painted portion, whereby the tree essential oil component in the adhesive is Is disclosed that it can be prevented from spreading to the outside in a short period of time and the long-term sustainability of the effects of essential oil components can be demonstrated.

  However, the formation of a surface coating film notch on a part of the surface of the printed decorative board requires advanced technology and is not only expensive to manufacture, but also air from the surface coating film notch. There is a risk that the decorative paper peels off or falls off due to the moisture inside. In addition, since the effect is not produced at one specific place or is extremely low, it is necessary to provide the coating portion uniformly without being unevenly distributed at a plurality of places on the surface of the printed decorative board. Therefore, there is a fear that the surface design of the printed decorative board is remarkably lowered. The present invention has been made in view of the above-described circumstances, and an object of the present invention is to improve the efficacy of mite growth suppression performance, antibacterial performance, fungus resistance performance, etc. by moderate and sufficient divergence of tree essential oil components. At the same time, it is an object to provide a wooden floor board containing a tree essential oil component having improved long-term sustainability at a low cost.

  The wood floor board containing the tree essential oil component of the present invention according to claim 1, which has been made to solve the above-mentioned problems, includes a back coat layer, a base material, an adhesive layer for attaching a sheet, an underlay sheet, an adhesive for attaching a single board In the wood floor board in which each layer of the agent layer, the decorative veneer, and the surface coating film is configured in this order from the back side of the wood floor board, at least an adhesive layer for attaching a single board or an underlay sheet of the above-described layers is a tree essential oil component It is characterized by containing.

  According to such a configuration, since the tree essential oil component is contained in at least the adhesive layer for adhering the single plate or the underlay sheet, the underlay sheet is formed in the lower direction in order for the tree essential oil component to diverge to the outside. , While passing through the sheet-adhesive adhesive layer, the base material such as plywood, and the back coat layer, or while passing through the sheet paste adhesive layer, the base material such as plywood, and the back coat layer in order. It gradually diverges. And in the upper direction, while passing through the decorative veneer and the surface coating in this order, or while passing through the veneer adhesive layer, the decorative veneer and the surface coating in this order, it gradually diverges over a long period of time. To go.

  Accordingly, various effects of the tree essential oil component, that is, mite suppression effect, mold prevention effect, antibacterial effect, etc., can be obtained moderately and stably over a long period of time. Moreover, since at least one of the layers constituting the floorboard is a composition containing a tree essential oil component in an adhesive layer for adhering a single plate or an underlay sheet, the production process is simplified, production efficiency is improved, and production is performed. Cost can also be reduced.

  The invention according to claim 2 of the present invention is the wood floor board comprising the tree essential oil component according to claim 1, wherein the layer containing the tree essential oil component is a single plate adhesive layer, a surface coating film, and a back surface. It is characterized by three layers of coat layers.

  According to such a configuration, the tree essential oil component is contained not only in the adhesive layer for adhering to a single plate, but also in the three layers of the front surface coating film and the back surface coating layer, so that the tree essential oil component is sufficiently stable for a long period of time. Because it diverges, it has excellent long-term sustainability. In addition, the synergistic effects can further improve the effects such as the mite suppression effect, the antifungal effect, the antibacterial effect and the like.

  The invention according to claim 3 of the present invention is the wood floor board comprising the tree essential oil component according to claim 1, wherein the layer containing the tree essential oil component is an underlay sheet, a surface coating film, and a back coat layer. It is characterized by being a layer.

  According to such a configuration, the tree essential oil component is contained not only in the underlay sheet, but also in the three layers of the surface coating film and the back surface coating layer. Excellent long-lasting efficacy. In addition, the synergistic effects can further improve the effects such as the mite suppression effect, the antifungal effect, the antibacterial effect and the like.

  According to the invention described in claim 1, since the tree essential oil component is contained in at least the adhesive layer for adhering to a single plate or the underlay sheet, in order to spread the tree essential oil component to the outside, in the downward direction Passes through the underlay sheet, the sheet adhesive layer, the base material such as plywood, and the back surface coating layer, or passes through the sheet adhesive layer, the base material such as plywood, and the back surface coating layer in this order. However, it gradually diverges over a long period of time. And in the upper direction, while passing through the decorative veneer and the surface coating in this order, or while passing through the veneer adhesive layer, the decorative veneer and the surface coating in this order, it gradually diverges over a long period of time. To go.

  Accordingly, various effects of the tree essential oil component, that is, mite suppression effect, mold prevention effect, antibacterial effect, etc., can be obtained moderately and stably over a long period of time. Moreover, since at least one of the layers constituting the floorboard is a composition containing a tree essential oil component in an adhesive layer for adhering a single plate or an underlay sheet, the production process is simplified, production efficiency is improved, and production is performed. Cost can also be reduced.

  According to the invention described in claim 2, since the tree essential oil component is contained not only in the adhesive layer for adhering to a single plate, but also in the three layers of the surface coating film and the back surface coating layer, the tree essential oil component is long. Long-lasting efficacy is excellent because it diverges stably for a long period. In addition, the synergistic effects can further improve the effects such as the mite suppression effect, the antifungal effect, the antibacterial effect and the like.

  According to invention of Claim 3, since a tree essential oil component is contained not only in an underlay sheet but in the three layers of a surface coating film and a back surface coating layer, a tree essential oil component is stable for a long period of time. Because it diverges sufficiently, it has excellent long-term sustainability. In addition, the synergistic effects can further improve the effects such as the mite suppression effect, the antifungal effect, the antibacterial effect and the like.

Sectional drawing which shows the wooden floor board containing the tree essential oil component of this invention. The principal part expanded sectional view of 1st embodiment of the wooden floor board containing the tree essential oil component of this invention. The principal part expanded sectional view of 2nd embodiment of the wooden floor board containing the tree essential oil component of this invention.

  Details of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a wood floor board containing the essential oil component of the present invention, FIG. 2 is an enlarged cross-sectional view of the main part of the first embodiment of the wood floor board containing the essential oil component of the present invention, and FIG. It is a principal part expanded sectional view of 2nd embodiment of the wooden floor board containing an essential oil component. In the figure, reference numeral 1 is a wood floor board, 2 is a base material, 3 is an underlay sheet, 4 is a decorative veneer, 5 is a surface coating film, 6 is a back surface coating layer, 7 is an adhesive layer for attaching a sheet, and 8 is a single sheet. The adhesive layer for board pasting, 9 is a fitting convex part, 10 is a fitting concave part, S shows a tree essential oil component.

  FIG. 1 is a cross-sectional view showing a wooden floor board 1 containing a tree essential oil component S of the present invention. The detail of the wooden floor board 1 containing the tree essential oil component S of this invention is described. The wood floor board 1 containing the tree essential oil component S of the present invention comprises a back coat layer 6, a base material 2, an adhesive layer 7 for attaching a sheet, an underlay sheet 3, an adhesive layer 8 for attaching a single board, and a makeup in order from the back side. Each layer of the single plate 4 and the surface coating film 5 is laminated in this order.

  In the first embodiment of the present invention, the tree essential oil component S is contained in at least the single-plate adhesive layer 8 among the plurality of floorboard constituent layers. That is, when the floor board constituent layer containing the tree essential oil component S is only the veneer adhesive layer 8 or the single board adhesive layer 8 and other floor board constituent layers contain the tree essential oil component S. It is a case.

  In the second embodiment of the present invention, the tree essential oil component S is contained in at least the underlay sheet 3 among the plurality of floorboard constituent layers. That is, the floor board constituent layer containing the tree essential oil component S is the underlay sheet 3 alone, or the underlay sheet 3 and other floor board constituent layers contain the tree essential oil component S.

  As the base material 2 of the wooden floor board 1 of the present invention, a wooden base material is suitable. Among them, the plywood is most suitable in consideration of availability, cost, strength and durability, suitability for processing, and other qualities. The tree species such as plywood used for the base material 2 is preferably South Sea wood used for applications such as lauan, capol, apiton, joncon, and other plywood in consideration of cost, availability, and the like.

  Moreover, as said base material 2, although said plywood is suitable, medium specific gravity fiber board, a wood-cut piece board, other woody base materials, etc. may be used. That is, as the base material 2, a medium specific gravity fiber board such as MDF, a wood piece board such as a particle board, a fiber orientation board such as OSB, etc. can be exemplified as a suitable material in addition to a plywood or the like. Among these, what is generally called Lauan plywood is most suitable in consideration of cost, availability, ease of use, and the like.

  In addition, as a surface decorative material for the wood floor board 1 of the present invention, a decorative veneer 4 is attached to the surface of the base material 2 with an adhesive via an underlay sheet 3. As an adhesive, a sheet-adhesive layer 7 for adhering the underlay sheet 3 immediately above the substrate 2, and a single-plate application for adhering the underlay sheet 3 and the decorative veneer 4 Two layers of the adhesive layer 8 are provided. Furthermore, a surface coating film 5 is provided on the surface of the decorative veneer 4.

The underlay sheet 3 inserted between the base material 2 and the decorative veneer 4 (may be a decorative veneer) has a basis weight of about 20-30 g / m ² and a thickness of about 40-60 microns. Thin paper, non-woven fabric, etc. may be used. Since the underlay sheet 3 is provided between the decorative veneer 4 and the base material 2, it is suitable for improving the surface cracking resistance of the decorative veneer 4. Conventionally, such an underlay sheet 3 is often manufactured by being laminated and bonded with an adhesive without being inserted between the base material 2 and the decorative veneer 4, and in this case, In many cases, the surface of the decorative veneer 4 has been cracked since it became a product such as a floorboard.

  This is because the base material 2 itself made of plywood expands and contracts due to moisture absorption and release of the base material 2 due to changes in ambient temperature, humidity, etc. during use for a long time after the floorboard construction. For this reason, an internal stress of expansion / contraction is generated in the decorative veneer 4 laminated and bonded thereon, and therefore, a surface crack occurs at a location of the decorative veneer 4 that cannot withstand the extensional stress.

  At this time, if the underlay sheet 3 is interposed between the surface decorative veneer 4 and the base material 2, the underlay sheet 3 absorbs the expansion and contraction of the base material 2 itself, and the extension inside the decorative veneer 4 is extended. Internal stress is relieved. Therefore, it becomes possible to effectively prevent the surface of the decorative veneer 4 from cracking.

  The veneer adhesive 8 for laminating the decorative veneer 4 and the adhesive 7 for laminating the underlay sheet 3 may be different, but if possible, the same or similar Use of an adhesive is suitable for cost, manufacturing workability, and the like. Adhesives used include urea resin adhesives, melamine resin adhesives, urea melamine co-condensation resin adhesives, urethane resin adhesives, vinyl acetate resin adhesives, styrene / butadiene rubber latex resin adhesives A melamine-modified latex resin adhesive or the like is preferably used. Of course, it is good even if it is other than these. Any material can be used as long as it can adhere a woody material.

  Next, as the decorative veneer 4, oak wood, birch wood, zelkova wood, cherry wood, teak wood, maple wood, oak wood and the like suitable as a floor board are preferred because they are hardwood, but other tree species Even so long as it is a tree species having surface hardness, strength durability, etc. that can be used as a floorboard.

  In addition, as a paint for finishing the surface of the wooden floor board 1 of the present invention and constituting the surface coating film 5, a thermosetting or ultraviolet curable synthetic resin paint is preferable in view of manufacturing workability. Urethane resin-based paints, epoxy resin-based paints, epoxy acrylate resin-based paints, polyester resin-based paints, aminoalkyd resin-based paints, and the like can be exemplified as suitable paints for the surface coating 5 of the decorative veneer 4. However, it is not limited to these. Further, one or more kinds of these synthetic resin-based paints may be used in combination of a plurality of layers for undercoating, intermediate coating, and topcoating.

  Further, the wooden floor board 1 of the present invention has a square or rectangular quadrilateral shape or a combination thereof as seen in a plan view (not shown). For example, in the case of a quadrilateral, the four sides of the quadrilateral are opposed to each other. On the two sides or the four sides, a fitting concave portion 10 and a fitting convex portion 9 that fits appropriately are formed as necessary. In the cross-sectional view shown in FIG. 1, the fitting convex portion 9 is formed on one side, and the fitting concave portion 10 that fits the fitting convex portion 9 is formed on the opposite side.

  The tree essential oil component S used in the present invention is an essential oil component S emitted from a tree by a substance generally called phytoncide. It is a substance that makes people feel uncomfortable when they walk in the forest and gives them a refreshing feeling. The substance called phytoncide is emitted from forest trees and has various effects such as anti-mite, antibacterial and antifungal properties. In addition to these effects, as described above, it has the effect of calming and refreshing the human mood.

  As the tree essential oil component S in this case, monoterpenes, sesquiterpenes, and diterpenes obtained by steam distillation mainly from leaves such as cedar, cypress, eucalyptus, and hiba are preferable. Of these, monoterpenes and sesquiterpenes having a relatively low boiling point and easily obtained by a distillation method are most preferred. Specifically, α-pinene, limonene and the like can be exemplified as monoterpenes, and cedrol can be exemplified as sesquiterpenes. Among these, the combination of α-pinene and limonene can be exemplified as the most preferable combination.

  FIG. 2 is an enlarged cross-sectional view of a main part showing an example of the first embodiment of the wood floor board 1 containing the tree essential oil component S of the present invention. Next, the detail of 1st embodiment of the wooden floor board 1 containing the tree essential oil component S of this invention is described. As shown in the enlarged sectional view of FIG. 2, in the first embodiment of the wood floor board 1 containing the tree essential oil component S of the present invention, the wood floor board 1 is composed of the back surface coating layer 6, the base material 2, and the sheet attached in order from the back surface side. The adhesive layer 7, the underlay sheet 3, the veneer adhesive layer 8, the decorative veneer 4 and the surface coating film 5 are laminated in this order. That is, it is composed of a plurality of layers including the single-plate bonding adhesive layer 8.

  And the tree essential oil component S is contained in the adhesive layer 8 for a single board sticking at least among the plurality of floor board constituting layers. That is, in the first embodiment, when the floor board constituent layer containing the tree essential oil component S is only the single board adhesive layer 8 or the single board adhesive layer 8 and other floor board constituent layers, This is a case where the essential oil component S is contained. FIG. 2 is an example of the first embodiment, and the floor board constituting layer containing the tree essential oil component S is composed of a total of three layers of a single board adhesive layer 8, a surface coating film 5, and a back surface coating layer 6. Is the case.

  More specifically, the plurality of constituent layers constituting the wood floor board 1 of the present invention are, in order from the bottom, the back coat layer 6, the base material 2, the sheet bonding adhesive layer 7, the underlay sheet 3, and the single plate bonding adhesive. Each layer of the agent layer 8, the decorative veneer 4 and the surface coating film 5 is laminated and configured in this order.

  Examples of the adhesive for adhering a single plate include urea resin adhesive, melamine resin adhesive, urea melamine co-condensation resin adhesive, urethane resin adhesive, vinyl acetate resin adhesive, styrene / butadiene rubber latex resin A system adhesive, a melamine-modified latex resin adhesive, and the like are preferably used.

As the natural essential oil component S, monoterpenes such as α-pinene and limonene are suitable as described above. As an example, a decorative resin veneer 4 is laminated and bonded by adding a predetermined amount of synthetic resin particles (not shown) containing a tree essential oil component S and emulsifying them to the veneer adhesive. The application amount of the adhesive for sticking a single plate at that time is preferably about 80 to 100 g / m ² per 1 m ² of the floor board area. If the amount is too small, adhesion failure of the decorative veneer 4 is likely to occur. If the amount is too large, the adhesive oozes out from the decorative veneer 4 to cause contamination.

Further, the content of the tree essential oil component S added to the adhesive varies depending on the material of the flooring material used, the size of the room in which the flooring material is constructed, and the ratio of the area of the flooring material to be constructed. The range of 2.0 to 10.0 g per ² is preferable. When the amount is 2.0 g or less, the period during which the tree essential oil component S diverges from the floorboard is short, resulting in poor efficacy sustainability. When the amount is 10.0 g or more, the adhesive strength of the decorative veneer 4 may be reduced. The range of 2.0 g to 10.0 g is balanced from the viewpoints of the duration of efficacy of the tree essential oil component S, the performance of the efficacy, and the maintenance of the quality of the floorboard. Therefore, this range is preferable. Furthermore, when the range of the content of the tree essential oil component S is 3.0 g to 8.0 g per 1 m ^{2 of the} flooring material, the above-described effect of the tree essential oil component S is sufficiently exhibited, the long-term sustainability of the effect, the floor board Most suitable from the viewpoint of quality maintenance.

  The tree essential oil component S is contained in the synthetic resin particles, and this is emulsified to form an essential oil component-containing emulsion. When the decorative veneer 4 is bonded to the surface of the base material 2, the veneer adhesive layer 8 and surface coating It is preferable to mix and use appropriate amounts in the three layers of the film 5 and the back coat layer 6.

  Next, among these, the tree essential oil component S added to the veneer adhesive layer 8 will be described in detail. The tree essential oil component S used in the essential oil component-containing emulsion is preferably a combination of two or more monoterpenes having different boiling points. At least about 5% to about 30% of the synthetic resin particles containing at least about 20% by weight, preferably about 40% by weight, of the two or more monoterpenes having different boiling points in the adhesive. It is good to add. Preferably, about 7% to 20%, and most preferably about 10 to 15% is added.

  Hereinafter, suitable component ratios such as the essential oil component-containing emulsion and the essential oil component S are shown by weight ratio. In this case, the addition ratio of the essential oil component-containing emulsion to the adhesive is preferably about 7% to 40% or less. Further, the ratio of synthetic resin particles in the essential oil component-containing emulsion is preferably about 60% to about 80%. The ratio of the essential oil component S in the synthetic resin particles is preferably about 40% of the essential oil component S relative to about 60% of the resin.

Further, in this case, the coating amount of the synthetic resin particles is preferably about 5 to 25 g per 1 m ^{2 of} the floor board area. In this way, in the floor plate area 1 m ² per coating amount of the trees essential oil component S becomes about 2 to 10 g, are preferred from the viewpoint of laminated veneer peeling prevention efficacy and floorboards of wood essential oil components S.

Further, as described above, in the floorboard area 1 m ² per to a coating weight of about 5~25g about the synthetic resin particles, for example, an adhesive coating weight in the floor plate area 1 m ² per about 100 g / When m ² , the ratio of synthetic resin particles in the tree essential oil component-containing emulsion is about 60% to about 80%, and the addition amount of the tree essential oil component-containing emulsion in the adhesive is about 8 to 32%. That's fine.

As another example, in order to set the application amount of the synthetic resin particles to about 5 to 25 g per 1 m ^{2 of} the floor board area, for example, the adhesive application amount per 1 m ² of the floor material area, When the ratio is about 100 g / m ² , the ratio of the synthetic resin particles in the tree oil component-containing emulsion is about 60%, and the amount of the tree oil component-containing emulsion added to the adhesive is about 9 to 42%. Good.

The manufacturing method of 1st embodiment of the wooden floor board 1 containing the tree essential oil component S of this invention is described. A plywood serving as the base material 2 is prepared, and a veneer veneer 4 used for surface decoration of the floor board is prepared. And considering the material of the decorative veneer 4, the species of the substrate 2, the manufacturing cost, workability, etc., the adhesive for adhering the veneer for adhering the decorative veneer 4 to the surface of the substrate 2, Select and prepare as appropriate. Furthermore, an appropriate amount of essential oil emulsion containing the tree essential oil component S is prepared. A thin paper having a basis weight of 20 to 30 g / m ² and a thickness of about 40 to 60 microns is prepared as the underlay sheet 3.

  The emulsion containing the essential oil component contains, as the tree essential oil component S, synthetic resin particles containing at least about 20 wt%, preferably about 40 wt% of two or more monoterpenes having different boiling points in the adhesive. A ratio of at least about 5% to about 30% is added. Preferably, about 7% to 20%, and most preferably about 10 to 15% is added.

  As an example, the case where the decorative veneer 4 is adhered to the surface of the substrate 2 using a melamine-modified latex resin adhesive will be described in detail.

First, the melamine-modified latex resin adhesive is used as an underlay sheet adhesive and a decorative veneer adhesive. The coating amount of the floorboard 1 m ² per the adhesive surface of the substrate 2, about 60~80g / m ^2, and so as to be applied, a laminator process the underlay sheet 3 (tree essential oil component S is not contained) Paste at a temperature of about 50 ° C. with a machine

In addition, as described above, it is preferable that the application amount of the adhesive for sticking the single plate is about 80 to 100 g / m ² per 1 m ² of the floor board area. Application is performed with a roll spreader or an application apparatus instead of the roll spreader. Then, in the synthetic resin particles floorboards area 1 m ² per, it is preferable to apply to approximately 5 to 25 g / ^{m 2} approximately. The decorative veneer 4 may be hot-pressed using a hot press or the like. Suitable conditions include, for example, a pressing pressure of about 7.0 to 12.0 kg / cm ² , a pressing temperature of about 100 ° C. to 120 ° C., and a pressing time of the thickness of the decorative veneer 4 and adhesion. Although depending on the type of the agent, it is about 50 to 90 seconds in the case of wet pasting of the decorative veneer 4 having a thickness of about 0.2 to 0.25 mm. Further, when the decorative veneer 4 is a dry thick veneer having a thickness of about 3.0 mm, pressing for about 3 to 4 minutes is required.

  As described above, in the first embodiment, the point that the tree essential oil component S is added to the veneer adhesive layer 8 is mainly described. However, the other surface coating step, the step of providing the back surface coating layer, the synthetic resin having the multilayer structure The details of the essential oil component-containing emulsion composed of particles, the process of producing the emulsion, and the like are the same as in the second embodiment, and will be described in detail there. Thus, in the first embodiment of the present invention, the tree essential oil component S is contained in at least the veneer adhesive layer 8, and in the example shown in FIG. 2, the veneer adhesive layer 8. The tree essential oil component S is contained in the three layers of the surface coating film 5 and the back surface coating layer 6.

  FIG. 3 is an enlarged cross-sectional view of the main part showing an example of the second embodiment of the wood floor board 1 containing the tree essential oil component S of the present invention. Next, the detail of 2nd embodiment of the wooden floor board 1 containing the tree essential oil component S of this invention is described. As shown in the enlarged sectional view of FIG. 3, in the second embodiment of the wooden floor board 1 containing the tree essential oil component S of the present invention, the wooden floor board 1 is composed of the back surface coating layer 6, the base material 2, and the sheet in order from the back surface side. Each layer of the adhesive layer 7 for sticking, the underlay sheet 3, the adhesive layer 8 for sticking a single plate, the decorative veneer 4 and the surface coating film 5 is laminated in this order. That is, it is composed of a plurality of layers including the underlay sheet 3.

  And the tree essential oil component S is contained in at least the underlay sheet 3 among the plurality of floor board constituting layers. That is, in the second embodiment, when the floor board constituting layer containing the tree essential oil component S is only the underlay sheet 3, or the underlay sheet 3 and other floor board constituting layers also contain the tree essential oil component S. Is the case. FIG. 3 shows an example of the second embodiment, in which the floor board constituting layer containing the tree essential oil component S is a total of three layers of the underlay sheet 3, the surface coating film 5, and the back coating layer 6.

As described above, the underlay sheet 3 is preferably a thin paper having a basis weight of about 20 to 30 g / m ² and a thickness of about 40 to 60 microns. Further, a bleached product with high whiteness is desirable in appearance. The reason is that the decorative veneer 4 is stuck on the thin paper via an adhesive, and the decorative veneer 4 is a thin sticker veneer having a thickness of about 0.2 to 0.3 mm. is there. When this wet thin veneer veneer is used as the veneer veneer 4, the veneer is thin, so if the underlay sheet 3 is unexposed and the whiteness is low, the veneer is transparent and the underlay sheet 3 having a low whiteness is produced. See through. For this reason, the quality and taste of the color of the tree species of the natural veneer are inevitably lowered, and the appearance design value is lowered. It is preferable to use this wet type thin veneer as the decorative veneer 4 in consideration of cost, productivity, finished design (appearance), and the like. Therefore, as the veneer veneer 4, a wet thin-projection veneer is suitable and often used.

  Moreover, as a method for containing the tree essential oil component S in the underlay sheet 3, an impregnation method, a coating method, and the like are suitable. This method will be described in detail below.

  The tree essential oil component S contained in the underlay sheet 3 may be the same as that added to the adhesive layer 8 for veneering as in the first embodiment. That is, monoterpenes such as α-pinene and limonene are suitable. As an example, there is a method in which a tree essential oil component S is incorporated in synthetic resin particles (not shown), and the underlay sheet 3 is impregnated with an emulsion.

  For example, an essential oil emulsion obtained by emulsion polymerization or the like containing about 25 to 35% by weight of a tree essential oil component S, about 35 to 50% by weight of a resin, and about 15 to 40% by weight of water is prepared as an impregnation solution. An underlay sheet 3 is prepared by cutting the underlay sheet 3 into a sheet having a width of about 0.92 m and a length of about 1.83 m. And after immersing this underlay sheet | seat for about 10 to 20 minutes, it passes between press rolls, an excess essential oil emulsion is removed, and it hardens | cures at normal temperature after that for 24 hours.

  In addition, as an application method, the underlay sheet 3 is prepared as a wound shape without being cut into sheets. Then, the essential oil emulsion is put in a roll coater and passed through the single-sided application roll from the front and back surfaces of the underlay sheet 3 twice, once in total, and applied to the underlay sheet 3 one side at a time, or underlay sheet, or 3 is passed through a double-sided coating roll, and the surface and back surface of the underlay sheet 3 are simultaneously coated on both sides, or the coating amount is slightly increased and the method is applied only from the surface side of the underlay sheet 3 or roll coating. In addition, a spray coating method or the like is preferable in consideration of workability and the like. After applying the essential oil emulsion S to the underlay sheet 3, similarly, the excess essential oil emulsion is removed by passing between press rolls, and then cured at room temperature for about 24 hours.

For example, the application amount or the impregnation amount is about 25 g / m ² as the underlay sheet 3 and about 50 microns in thickness, about 1.8 m in length and about 0.9 m in width, About 13 to 57 g per underlay sheet is suitable. That is, the impregnation amount or application amount of the essential oil emulsion is preferably about 8 to 35 g / m ² . Since the content of the synthetic resin particles in the essential oil emulsion is from about 60 wt% to 80 wt%, the amount of impregnation or coating of the synthetic resin particles is about 4.8~28g / ^{m 2} approximately. Of these, the tree essential oil component S is 40%, wood essential oil component S about 1.9~11.2g / ^{m 2} approximately, preferably speaking, the content of about 2 to 10 g / ^{m 2} trees essential oil component S Can be made.

In this way, the area 1 m ² per wood floorboard 1, it is possible to trees essential oil component S is to contain about 2 to 10 g / m ^2, is suitable for slow release and floor quality wood essential oil component S . If it is 2.0 g / m ² or less, the divergence period of the tree essential oil component S is short, and the efficacy persistence is poor. Therefore, the effect cannot be exhibited sufficiently. Moreover, in the case of 10.0 g / m < ² > or more, it will cause the fall of the adhesive strength of the decorative veneer 4, and there exists a possibility of causing the lamination peeling of the decorative veneer 4. FIG. The range of 2.0 g to 10.0 g is balanced from the viewpoints of the duration of efficacy of the tree essential oil component S, the manifestation of efficacy, and the maintenance of the quality of the floorboard. Therefore, this range is preferable.

  As the preferred monoterpenes, a combination of at least two monoterpenes having different boiling points is preferable, as in the first embodiment. The combination of α-pinene and limonene has been exemplified as a preferable one, because the combination of α-pinene and limonene is a combination whose boiling points are different from each other. This is because the force is increased and the effect of the tree essential oil component S can be maintained for a long period of time even when the floorboard is used for a long period of time, and thus a stable effect can be exhibited.

  More specifically, the tree essential oil component S used for the wood floor board 1 of the present invention is composed of at least two types of monoterpenes having different boiling points, as described above, so that the natural essential oil component S having the lower boiling point diverges quickly. However, while maintaining the initial efficacy at a certain level, the other natural essential oil component S having a high boiling point diverges relatively slowly. Therefore, it is possible to continue to maintain the effect for a long time. Thus, since it has a two-stage mechanism, it becomes possible to control the divergence rate of the natural essential oil component S, and from the viewpoint of maintaining various effects of the natural essential oil component S, from the maintenance of the initial efficacy, The wood floor board 1 of the present invention, which is sustainable for a long period of time until the long-term effect is maintained, is completed. This action is the same as in the case of the first embodiment.

  Details of the synthetic resin particles (not shown) incorporating the tree essential oil component S will be described. Preferred examples of the resin forming the synthetic resin particles include vinyl acetate resin, ethylene vinyl acetate copolymer resin, acrylic vinyl acetate resin, acrylic resin, polyester resin, and polypropylene resin. Of these, the vinyl acetate resin and ethylene vinyl acetate copolymer resin described above are most suitable as the inner layer resin in view of manufacturing workability and the like.

  More specifically, the synthetic resin particles are composed of an outer shell layer and an inner layer, and the inner layer is composed of an inner layer peripheral portion and an inner layer center portion. And it is comprised (not shown) by the triple structure (multilayer structure) of an outer shell layer, an inner-layer periphery part, and an inner-layer center part. The inner layer periphery is mainly impregnated with α-pinene, and the inner layer center is mainly impregnated with limonene. Thus, impregnation with a tree essential oil component S comprising a combination of at least two types of monoterpenes having different boiling points is preferable for sustained release.

  As an example of the resin in this case, an acrylic resin may be used for the outer shell layer, and a vinyl acetate resin, an ethylene vinyl acetate copolymer resin, or the like may be used for the inner layer as described above. Considering the affinity between the essential oil component S and the resin, and considering the sustained release performance of the essential oil component S, this combination is suitable. This is also the same as in the case of the first embodiment.

  Further details will be described. A method for producing a triple-layer (multi-layer) synthetic resin particle containing the tree essential oil component S will be described. As described above, vinyl acetate resin, ethylene vinyl acetate copolymer resin, acrylic vinyl acetate resin, acrylic resin, polyester resin, polypropylene resin and the like are used as the resin constituting the synthetic resin particles.

  The tree essential oil component S may be a combination of α-pinene and limonene, a combination of terpineol and cineol, a combination of limonene and cineol, a combination of pinene and cineol, and the like. These have different affinities for the synthetic resin particles, and thus the impregnation and absorption positions for the synthetic resin particles are different.

  Among these, a vinyl acetate resin is used as the resin constituting the synthetic resin particles, and a combination of α-pinene and limonene is most preferable as the essential oil component S because it is inexpensive and easily available. Limonene is mainly impregnated in the central part (inner layer central part) of the synthetic resin particles, and α-pinene is mainly impregnated in the peripheral part (inner layer peripheral part) of the synthetic resin particles.

  The synthetic resin particles made of the vinyl acetate resin are obtained as a resin emulsion made of a vinyl acetate polymer by emulsion polymerization in the presence of a nonionic surfactant. Of the essential oil component S, the limonene impregnated in the center of the inner layer of the synthetic resin particles is added to the vinyl acetate resin emulsion, stirred while heating as necessary, and the emulsion of synthetic resin particles made of vinyl acetate resin. Impregnate with limonene. Next, in the same manner, an emulsion of synthetic resin particles made of vinyl acetate resin is impregnated with α-pinene. In the same manner, α-pinene is added to the resin emulsion and the periphery of the inner layer of the synthetic resin particles is impregnated with α-pinene to obtain an essential oil component-containing emulsion.

  Next, the essential oil component-containing emulsion will be described in more detail. The essential oil component-containing emulsion is made of synthetic resin particles having a triple structure (multilayer structure) of the outer shell layer, the inner layer peripheral portion, and the inner layer center portion by covering the outer side of the inner layer resin with the outer shell resin. As described above, first, a vinyl acetate resin emulsion as an inner layer is produced, and the essential oil component S is added and impregnated therein to produce an emulsion of synthetic resin particles made of vinyl acetate resin. A monomer and a polymerization initiator are added, and the outer shell of a synthetic resin particle made of vinyl acetate resin is covered with a polymer compound while heating and stirring as necessary. can get.

  As the resin constituting the outer shell, acrylic resin, propylene resin, polyester resin and the like are preferably used. Among these, when the resin constituting the inner layer is a vinyl acetate resin, an acrylic resin is most suitable for the sustained release of the tree essential oil component S as the outer shell resin.

  In this way, an essential oil component-containing emulsion composed of synthetic resin particles having a triple-layered multilayer structure containing the tree essential oil component S used in the present invention is produced.

  Next, as an example, the case where the underlay sheet 3 and the veneer veneer 4 that have been impregnated with the essential oil emulsion are pasted on the base material 2 using a melamine-modified styrene-butadiene rubber latex resin adhesive is detailed. In the following. The underlay sheet 3 impregnated with the essential oil emulsion is prepared by cutting it into sheets of a predetermined size. The cut size is preferably about 920 mm wide × about 1830 mm long when the substrate plywood is 3 × 6 size.

Plywood was used as the substrate 2. This case is the same as in the first embodiment. First, the underlay sheet 3 that has been impregnated with the essential oil emulsion and has been cured and cut into sheets is adhered to the base material 2 with an adhesive for sheet pasting. In this case, the adhesive application amount is preferably about 60 to 80 g / m ² per 1 m ² of the floor board area.

The processing machine may be hot pressed using a hot press. As an example of the hot pressing conditions, the pressing temperature is about 45 to 60 ° C., the pressing pressure is about 1.0 to 3.0 kg / cm ² , and the pressing time is about 20 to 60 seconds.

Moreover, after sticking the said underlay sheet 3 to the plywood base material 2, the decorative veneer 4 is stuck on it. In that case, it sticks with the adhesive agent for single plate sticking. In consideration of manufacturing workability, the same or the same kind of adhesive for sheet attachment and adhesive for single plate attachment is preferable. Cosmetic adhesive coating weight of a single-plate bonding step, in the floor plate area 1 m ² per about 80-100 g / ^{m 2} are preferred. As a processing machine, it is good to apply | coat an adhesive agent with a roll spreader or an application apparatus replaced with it, and to heat-press with a hot press. Suitable heat pressing conditions include, for example, a pressing pressure of about 7.0 to 12.0 kg / cm ² , a pressing temperature of about 100 ° C. to 120 ° C., and a pressing time of the decorative veneer 4 thickness, Although it depends on the type of adhesive, it is about 50 to 90 seconds in the case of a wet-bonded veneer having a thickness of about 0.2 to 0.25 mm.

  Next, the painting process will be described. This case is the same as in the first embodiment. Moreover, as shown in detail in FIG. 3, the tree essential oil component S added to the surface coating 5 of the wood floor board 1 of the present invention includes, as an example, cypress wood, hiba wood, eucalyptus wood, phytoncide from other trees, Natural extractive ingredients called can be used. Of these, hinokitiol, which is a troponoid effective as a hinoki timber extract component, is suitable as an essential oil component added to the outermost surface coating film of the floor board in view of efficacy and sustained release properties. Moreover, as tree essential oil component S other than this, a cineol, cedrol, etc. can be illustrated as a suitable thing. These tree essential oil components S may be used alone or in combination, or mixed with other monoterpenes, sesquiterpenes, and diterpenes.

For example, about 15 to 30 g (about 0.1% to about 0.2% by weight ratio) of hinokitiol, which is a troponoid, is suitable for 16 kg of the top coat. Appropriate amount is added when blending the paint in the top coating process. The viscosity of the paint is about 9 to 10 seconds (Z / C # 5), and the coating amount of the top coat is preferably about 5.5 to 7.5 g / m ² .

  The coating process is performed in the order of a base sealer process, a coloring process, a complementary color process, an undercoating process, an intermediate coating process, and an overcoating process. This is an example of a suitable coating process, and it is needless to say that even a process other than this is acceptable.

The coating amount in the coating process is about 5 to 7 g / m ² in the base sealer process, and in the coloring process and the complementary color process, an appropriate amount of colorant is applied in consideration of the color tone, saturation, brightness, density, and the like of the finished color. About 25-30 g / ^{m 2} with a primer step, intermediate step at about 30~35g / ^{m 2,} is approximately 5.5~7.5g / ^{m 2} by overcoating step, finish properties, coating properties, quality, cost Etc. are preferable.

  The coating process is not limited to this condition. In particular, the coating amount may be increased by about 50% of these and thick coating may be performed. There is no change in the efficacy etc. of the tree essential oil component S. The appearance finish of the floorboard surface is improved.

  During each coating process, for example, an ultraviolet curing lamp is irradiated to sufficiently cure the coating film, and after the intermediate polishing as necessary, the next coating process is started. As the paint used, the above-mentioned thermosetting or ultraviolet curable synthetic resin paint is suitable in consideration of manufacturing workability and the like. In view of painting workability, production efficiency, etc., an ultraviolet curable coating is more desirable. Urethane resin-based paints, epoxy resin-based paints, epoxy acrylate resin-based paints, polyester resin-based paints, aminoalkyd resin-based paints, and the like can be exemplified as paints suitable for the application of the decorative veneer 4. However, it is not limited to these.

Next, the back surface coating layer 6 will be described. This case is the same as in the first embodiment. A back coat layer 6 made of an essential oil emulsion is provided on the lowermost layer of the wood floor board 1 containing the tree essential oil component S of the present invention, that is, on the back surface of the substrate 2. The essential oil emulsion used for the back coat layer 6 may be the same as the essential oil emulsion impregnated in the underlay sheet 3. (In the case of the first embodiment, it may be the same as the essential oil emulsion added to the adhesive for applying a decorative veneer.) Use of the same improves the workability of production and is excellent in cost. Insect repellent and formalin catcher are added to the essential oil emulsion to prepare a back coating agent. The coating amount of the back surface coating agent is preferably about 30 to 50 g / m ² per 1 m ² of floor board area.

  Natural essential oil component S contained in the surface coating film 5 located in the outermost surface layer of the wood floor board 1 containing the essential oil component S of the present invention, and the essential oil contained in the back surface coating layer 6 of the substrate 2 Component S is contained in the essential oil emulsion that diverges from the floor plate surface and the back surface of the floor plate at the initial stage of the floor plate construction and then impregnated and applied to the underlay sheet 3 (added to the adhesive for single plate bonding in the first embodiment). This is a mechanism in which the tree essential oil component S is diverging.

  Specifically, the triple-layer structure (multi-layer structure) in the essential oil emulsion of the back coat layer 6 and the essential oil emulsion impregnated and applied to the underlay sheet 3 (the essential oil emulsion added to the adhesive for applying a decorative veneer in the first embodiment) The mechanism of divergence of the tree essential oil component S contained in the synthetic resin particles is as follows.

  That is, as described above, the tree essential oil component S contained in the top coat 5 and the tree essential oil component S contained in the back coat layer 6 of the base material 2 are in the initial stage of floor board construction. A mechanism that diverges from the front surface and the back of the floorboard, then α-pinene impregnated in the inner layer periphery of the synthetic resin particles diverges, and finally, the limonene impregnated in the center of the inner layer diverges It is. In this way, the tree essential oil component S is gradually released even after the floorboard is used for a long time from the initial state after the floorboard construction, so that a stable effect can be exhibited over a long period of time.

  The manufacturing method in 2nd embodiment of the wood floor board 1 containing the tree essential oil component S of this invention is described. To be added to the base material 2, the veneer veneer 4, the underlay sheet 3, the sheet adhesive, the veneer adhesive, the emulsion containing the tree essential oil component S, the paint, the colorant, and the surface coating film 5. A tree essential oil component S, a back surface coating agent and the like are prepared. As an example, it may be manufactured by the following procedure.

As the underlay sheet 3, a thin paper having a basis weight of 20 g / m ² and a thickness of about 40 microns is prepared. The size is a small roll having a width of 920 mm, or a sheet having a length of 1830 mm and a width of 920 mm. In the essential oil emulsion, a combination of two or more kinds of monoterpenes having different boiling points as the tree essential oil component S is suitable for sustained release, and among them, the combination of α-pinene and limonene is considered in terms of manufacturing workability, cost, etc. Most preferred.

  Here, the manufacturing method of an essential oil emulsion is described. First, a method for producing synthetic resin particles made of vinyl acetate resin will be described. This is obtained as a resin emulsion comprising a vinyl acetate polymer by emulsion polymerization in the presence of a nonionic surfactant.

  To this vinyl acetate resin emulsion, limonene impregnated in the center of the inner layer of the synthetic resin particles of the tree essential oil component S is added, and stirred while heating as necessary to form an emulsion of synthetic resin particles made of vinyl acetate resin. Impregnate with limonene. Next, in the same manner, an emulsion of synthetic resin particles made of vinyl acetate resin is impregnated with α-pinene to obtain an emulsion containing a tree essential oil component S.

  Next, the resin particles made of the vinyl acetate resin of the emulsion are used as the inner layer resin, and the outer side is covered with the outer shell resin, so that synthetic resin particles having a triple structure (multilayer structure) are obtained. At this time, a polymerizable monomer and a polymerization initiator are added to resin particles made of vinyl acetate resin, and the outer surface of the resin particles is covered with a polymer compound while heating and stirring as necessary to form an outer shell layer. An emulsion of synthetic resin particles having a triple structure (multilayer structure) containing the essential oil component S is obtained. This is an emulsion of synthetic resin particles having a multilayer structure consisting of a three-layer structure of an outer shell layer, an inner layer peripheral portion, and an inner layer central portion.

  As the resin constituting the outer shell layer, an acrylic resin, a propylene resin, a polyester resin, or the like is preferably used. Among these, when the resin constituting the inner layer is a vinyl acetate resin, an acrylic resin is most suitable for the sustained release of the tree essential oil component S as the outer shell resin.

  In this manner, an essential oil emulsion composed of synthetic resin particles having a triple structure (multilayer structure) containing the tree essential oil component S used in the present invention is obtained. It is preferable that the inner layer resin is a vinyl acetate resin and the outer shell layer resin is an acrylic resin. The preferable blending weight ratio is about 24 to 32% for the tree essential oil component S, about 36 to 48% for the synthetic resin particles, and about 20 to 40% for water. For example, it is preferable that the weight ratio of the tree essential oil component S, synthetic resin particles, and water is 28% for the tree essential oil component S, 42% for the synthetic resin particles, and 30% for water.

  Next, the step of impregnating the underlay sheet 3 with the essential oil emulsion will be described. As an example, the case where the underlay sheet 3 is cut and impregnated into 3 × 6 sheet is described in detail.

The underlay sheet 3 is cut into 3 × 6 sheets, and immersed in an essential oil emulsion composed of the synthetic resin particles for about 15 minutes. After impregnating the underlay sheet 3, it is cured at room temperature for 24 hours, and then the moisture is cured until it is in equilibrium with the air dry moisture content. As an example, the amount of impregnation at that time is preferably about 6 to 30 g / m ² . Of these, about 20 g / m ² is most preferable. Among these, since the weight ratio of the synthetic resin particles in the essential oil emulsion is about 60 to 80%, the impregnation amount of the synthetic resin particles is about 3.6 to 24 g / m ² per 1 m ² of the floor board. Most preferably, it is about 12 to 16 g / m ² . In addition, since the weight ratio of the tree essential oil component S to the synthetic resin particles is about 40%, the tree essential oil component S is about 1.4 to 9.6 g / m in only the layer of the underlay sheet 3 per 1 m ^{2 of} the floor board. the m ^2. Most preferably, it is about 4.8 to 6.4 g / m ² .

Next, the above-described underlay sheet 3 containing the tree essential oil component S is applied to the base material 2 made of Lauan plywood having a size of 3 × 6 (length: about 1830 mm × width: about 920 mm × thickness: about 12.0 mm). Adhesion is performed with an adhesive for attaching sheets without adding any essential oil components. As the adhesive, a melamine-modified styrene / butadiene rubber latex resin adhesive may be used. The amount of adhesive applied is about 60 to 80 g / m ² . Most preferably, it is adjusted to 70 g / m ² . It is preferable to prepare the underlay sheet 3 as a 3 × 6 sheet and heat-press it on the surface of the substrate 2 with a hot press. Suitable hot pressing conditions are a pressing temperature of about 45 to 60 ° C., a pressing pressure of about 1.0 to 3.0 kg / cm ² , and a pressing time of about 20 to 60 seconds.

  Subsequently, the decorative veneer 4 is adhered to the base plate after the sheet is adhered using the adhesive for adhering the veneer. As the decorative veneer 4, for example, a wet veneer made of oak having a thickness of about 0.2 mm may be used.

As the single plate adhesive, the same adhesive as the sheet adhesive may be used. It is an adhesive without addition of the tree essential oil component S. After curing the base plate surface temperature after the sheet is attached to room temperature, an adhesive is applied to the base plate surface with a roll spreader. The amount of adhesive applied is about 80-100 g / m ² . It is good to perform hot pressing with a hot press. The hot pressing conditions are as follows. The pressing pressure is about 7.0 to 12.0 kg / cm ² . The pressing temperature is about 100 ° C to 120 ° C. The pressing time is about 50 to 90 seconds. This is deposited and cured for about 2 to 3 days until the plate surface temperature reaches room temperature.

Next, the back surface coating layer 6 made of an essential oil emulsion or the like is applied to the back surface of the base plate on which the decorative veneer has been applied. The essential oil emulsion at this time may be the same as that impregnated in the underlay sheet 3. An insect repellent and a formalin catcher agent are added to this essential oil emulsion to form a back coating agent. When these are added, it is suitable for an insecticidal effect against termites on the floor board and prevention of formalin odor. As the insect repellent, a chloronicotyl repellent mainly composed of non-phosphorus imidacloprid is preferable from the viewpoint of insect repellent effect and safety. Add an insect repellent and a formalin catcher to the essential oil emulsion and add water to make a back coat. Suitable examples of the back coating agent include, by weight, about 1 to 2% insect repellent, about 3 to 9% tree essential oil emulsion, about 40 to 45% formalin catcher, and about 50% water. is there. The coating amount is preferably about 30 to 50 g / m ² . However, it is not limited to this.

As a suitable example, a back coating agent may be prepared by blending as an insect repellent 2%, a tree essential oil emulsion 5%, a formalin catcher agent 43%, and water 50%. About 67 g of this back surface coating agent may be applied to the back surface of the base material 2 made of Lauan plywood having a size of 3 × 6 (length: about 1830 mm × width: about 920 mm × thickness: about 12.0 mm). It is most preferable that the coating amount per 1 m ^{2 of the} floor board is about 40 g / m ² . As an example, after applying with a grooved roll spreader and curing at room temperature for about 5 minutes, it may be dried in a drying furnace at about 50 to 70 ° C. for about 15 minutes.

  Subsequently, the 3 x 6 size floor board in-process product is cut into a floor board finished size by a processing machine. Next, surface groove processing and actual processing are performed as necessary. First, as an example, it is cut into a size of about 1 × 6 scales with a three-part cutting machine, and then the actual processing is performed using a tenoner. The floor board 1 is viewed in plan, and the actual processing is performed on the four sides of the quadrilateral. A convex part and a concave part fitted to the convex part are formed for every two opposite sides. The fitting convex part 9 and the fitting concave part 10 as shown in sectional drawing of FIG. 1 are processed. The machining shape is merely an example, and other shapes may be used. Furthermore, a vertical groove and / or a horizontal groove are processed on the floor board surface as needed. The groove shape is appropriately selected in consideration of floor board design, such as a cross-sectional view, a V-shape, a square shape, a U-shape, and the like.

  Next, the painting process is started. As the paint to be used, a thermosetting or ultraviolet curable synthetic resin paint is preferable, but an ultraviolet curable paint is more preferable in consideration of coating workability and production efficiency.

  Urethane resin-based paints, epoxy resin-based paints, epoxy acrylate resin-based paints, polyester resin-based paints, aminoalkyd resin-based paints, and the like can be exemplified as paints suitable for the application of the decorative veneer 4. However, it is not limited to these.

  As an example of a suitable paint, a combination of an ultraviolet curable solventless epoxy resin paint and a solvent polyester resin paint can be exemplified. It is suitable from the viewpoints of product finish, coating film performance, workability, productivity, production cost, etc. However, other than these, of course, it should be good. As the coating machine, a known coating machine such as a roll coater, a flow coater, or an automatic spray coating machine is used.

  As an example of the coating process, high-quality coating using an ultraviolet curing type paint is illustrated. A suitable example of the coating process is preferably applied in the order of a sealer process, a coloring process, a complementary color process, an undercoating process, an intermediate coating process, and an overcoating process.

A suitable example is shown. The total coating amount in the undercoating and intermediate coating steps is preferably about 55 to 65 g / m ² as an example. For the undercoat, a solvent-free epoxy resin coating is preferably applied at 28 g / m ² with a roll coater and an irradiation energy of about 290 mj with an ultraviolet lamp. For intermediate coating, a solvent-based polyester resin coating is preferably applied at 32 g / m ² with a roll coater and an irradiation energy of about 380 mj with an ultraviolet lamp.

Solventless epoxy resin paint is suitable for the top coating. As an example, the amount of top coating is preferably about 5.5 to 7.5 g / m ² . As a preferred example, a solvent-free epoxy resin paint is applied at 6 g / m ² with a roll coater and an irradiation energy of about 380 mj with an ultraviolet lamp.

  A UV curing lamp (UV curing lamp) is irradiated between the undercoating, intermediate coating, and topcoating processes to sufficiently cure the coating film, and the number is relatively fine with # 240 to # 320. Using a sandpaper, lightly intermediate polishing with a platen-type belt sander, and then enter the next painting step.

  Furthermore, in the top coating step of the coating step, an appropriate amount of hinokitiol may be added to the top coating material. A suitable addition amount of the hinokitiol is about 15 to 30 g with respect to 16 kg of the solventless epoxy resin coating. The amount of hinokitiol added is preferably about 0.1% to 0.2%. Most preferably, about 20 g of hinokitiol is added to 16 kg of the solventless epoxy resin coating. The addition amount ratio at this time is 0.125% by weight. The coating process is not limited to this condition. In particular, the coating amount may be increased by about 50% of these and thick coating may be performed. There is no change in the efficacy of the essential oil component of trees. The appearance finish of the floorboard surface is improved.

EXAMPLES Hereinafter, although an Example demonstrates this invention further in full detail, this invention is not limited by this.

  Example 1.

First, an underlay sheet 3 containing no tree essential oil component S was prepared. For the underlay sheet 3, a thin paper having a basis weight of 20 g / m ² , a thickness of about 40 microns and a width of about 920 mm was prepared in a wound form. Using a sheet bonding adhesive on a base material 2 consisting of a Lauan plywood 12mm thick x 920mm wide x 1830mm long, the underlay sheet 3 is stuck at a temperature of about 50 ° C with a laminator, and the plate surface is at room temperature. Cured until. As the adhesive, a melamine-modified styrene / butadiene rubber latex resin adhesive was used.

The weight ratio of the adhesive was as follows. 30 parts by weight of a modified latex resin, 30 parts by weight of a modified melamine resin, 22 parts by weight of flour as an extender, 2 parts by weight of water, 16 parts by weight of an emulsion to which no tree essential oil component S is added, The adhesive for underlay sheet sticking was adjusted. Therefore, the tree essential oil component S was not contained at all in the adhesive for sticking the underlay sheet at this time. The adhesive application amount was adjusted to 70 g / m ² .

Next, the decorative veneer attaching process is started. As an adhesive, 30 parts by weight of a modified latex resin, 30 parts by weight of a modified melamine resin, 22 parts by weight of flour as an extender, and 2 parts by weight of water were blended, and the tree essential oil component S was contained therein. An adhesive for applying a decorative veneer was prepared by blending 16 parts by weight of the emulsion. Therefore, the tree essential oil component S was contained in the adhesive for sticking a decorative veneer at this time. Next, 100 g / m ² of the above-mentioned adhesive is applied to the 3 mm × 6 mm lauan plywood with a thickness of 12 mm, and then a wood veneer veneer is pasted together with a thickness of 0.22 mm. Hot pressed. As the pressing conditions, hot pressing was performed at a pressing temperature of 100 ° C., a pressing pressure of 7.0 kg / cm ² , and a pressing time of 60 seconds.

The weight ratio of the tree essential oil emulsion in the veneer adhesive is 16%. Moreover, since the suitable range of the synthetic resin particle ratio in an essential oil emulsion is 60 to 80%, in Example 1, it was set to 70% of the middle. Therefore, since the blending weight ratio of the synthetic resin particles is 11.2% and the application amount of the adhesive is 100 g / m ² , the application amount of the synthetic resin particles is 11.2 g / m ² per 1 m ² of the floor board. . Among these, since the weight ratio of the tree essential oil component S to the synthetic resin particles is about 40%, the content of the tree essential oil component S is about 4.5 g / m ² per 1 m ² of the floor board. Thereafter, curing was performed for 24 hours, and after the surface temperature of the plate surface returned to room temperature, the back surface coating and the surface coating were performed in the back surface coating step and the coating step.

The back coat will be described. A back coat layer 6 made of an essential oil emulsion is applied to the back of the base plate on which the decorative veneer has been applied. The essential oil emulsion at this time may be the same as that added to the veneer adhesive. An insect repellent and a formalin catcher agent are added to this essential oil emulsion. As the insect repellent, a chloronicotyl repellent mainly composed of non-phosphorus imidacloprid is preferable from the viewpoint of insect repellent effect and safety. Add an insect repellent and a formalin catcher to the essential oil emulsion and add water to make a back coat. Suitable examples of the back coating agent include, by weight, about 1 to 2% insect repellent, about 3 to 9% essential oil emulsion, about 40 to 45% formalin catcher, and about 50% water. . The coating amount is preferably about 30 to 50 g / m ² .

In Example 1, a back coating agent was prepared by blending as an insect repellent 2%, an essential oil emulsion 5%, a formalin catcher agent 43%, and water 50%. About 67 g of this back surface coating agent was applied to the back surface of the base material 2 made of Lauan plywood having a size of 3 × 6 (length: about 1830 mm × width: about 920 mm × thickness: about 12.0 mm). The coating amount per 1 m ^{2 of} floor board was about 40 g / m ² . Among these, since the ratio of the emulsion containing the tree essential oil component S is 5%, the essential oil emulsion was about 2 g / m ² per 1 m ² of the floor board. Since the ratio of the synthetic resin particles in the essential oil emulsion was 70%, the synthetic resin particles were 1.4 g / m ² per 1 m ² of the floor board.

Moreover, since the ratio of the tree essential oil component S in the synthetic resin particles was about 40%, the tree essential oil component S was about 0.6 g / m ² per 1 m ² of the floor board. After applying with a grooved roll spreader and curing at room temperature for about 5 minutes, it was dried in a drying furnace at about 50 to 70 ° C. for about 15 minutes. Next, the painting process is started.

Next, the painting process will be described. The sealer process, coloring process, complementary color process, undercoating process, intermediate coating process, and topcoating process were carried out in this order. The paint used was an ultraviolet curing type. In the sealer process, about 6 g / m ² roll of solventless epoxy paint was applied, and the irradiation energy was 300 mj with an ultraviolet lamp. Subsequently, in the coloring and complementary color process, the colorant is applied to the decorative veneer 4 with a roll coater, the excess colorant is scraped off with a reverse coater, and the colorant is put into a grain hole such as a conduit of the veneer veneer 4 Imprinted.

Subsequently, a solvent-free epoxy resin paint was applied to the undercoat with a roll coater at 28 g / m ² , and the irradiation energy was 290 mj with an ultraviolet lamp. For the intermediate coating, a solvent-based polyester resin coating was applied at 32 g / m ² with a roll coater, and the irradiation energy was 380 mj with an ultraviolet lamp. For the top coating, a solventless epoxy resin coating was applied at 6 g / m ² with a roll coater, and the irradiation energy was 380 mj with an ultraviolet lamp.

At this time, an appropriate amount of hinokitiol was added to the surface coating in the top coating process of the coating process. The amount of hinokitiol added was 20 g of hinokitiol (0.125% by weight) per 16 kg of solventless epoxy resin paint. At this time, the tree essential oil component S per 1 m ^{2 of the} floor board added by the coating film was about 0.01 g / m ² . The total amount of the tree essential oil component S per 1 m ² of the floor board of Example 1 was about 5.11 g / m ² . Thus, the sample of Example 1 of the wooden floor board 1 of this invention was produced, and it used for the test described below.

Example 2.
Next, Example 2 will be described. A thin paper having a basis weight of 20 g / m ² and a thickness of about 40 microns was prepared as the underlay sheet 3. The size was cut into a sheet having a length of 1830 mm and a width of 920 mm. This cut underlay sheet 3 was immersed in the essential oil emulsion and impregnated. The essential oil emulsion was prepared based on the manufacturing method described above.

  The essential oil component S, the synthetic resin particles, and the water, each having a weight ratio of 28%, the synthetic resin particles 42%, and the water 30%, are emulsion-polymerized as described above, Obtained.

Next, the underlay sheet 3 was immersed and impregnated in the essential oil emulsion composed of the synthetic resin particles for about 15 minutes. The underlay sheet 3 was impregnated with the essential oil emulsion and then cured at room temperature for 24 hours until the water content was equilibrated with the air dry moisture content. As an example, the impregnation amount at that time was 20 g / m ² per 1 m ² of the underlay sheet. Since the suitable range of the synthetic resin particle ratio in the essential oil emulsion is 60 to 80%, in Example 2, the intermediate ratio was set to 70%. (Also in Example 1, it was 70%). Therefore, the synthetic resin particle was 14 g / m ² per 1 m ^{2 of} the underlay sheet. Accordingly, among these, the weight ratio of the tree essential oil component S to the synthetic resin particles is about 40%, so the tree essential oil component S was about 5.6 g / m ² per 1 m ^{2 of} the underlay sheet.

  Next, the underlay sheet 3 containing the tree essential oil component S is sheeted on the base material 2 made of Lauan plywood having a size of 3 × 6 (length: about 1830 mm × width: about 920 mm × thickness: about 12.0 mm). It stuck with the adhesive for sticking. As the adhesive, a melamine-modified styrene / butadiene rubber latex resin adhesive was used. The tree essential oil component S was not added to the adhesive at this time.

  Adhesive formulation is 30 parts by weight of modified latex resin, 30 parts by weight of modified melamine resin, 22 parts by weight of flour as an extender, and 2 parts by weight of water, and 16 weights of emulsion containing no tree essential oil component S added thereto. The adhesive for sticking an underlay sheet was adjusted by mixing the parts.

The application amount of the adhesive was adjusted to 70 g / m ^2, and was stuck in a 3 × 6 size with a hot press. The hot-pressing conditions were as follows: the pressing temperature was 50 ° C., the pressing pressure was 1.5 kg / cm ² , and the pressing time was 30 seconds.

  Subsequently, the decorative veneer 4 was adhered to the baseboard plywood after the underlay sheet was pasted using a veneer adhesive without adding the tree essential oil component S. As the adhesive, a melamine-modified styrene / butadiene rubber latex resin adhesive was used.

  Adhesive formulation is 30 parts by weight of modified latex resin, 30 parts by weight of modified melamine resin, 22 parts by weight of flour as an extender, and 2 parts by weight of water, and 16 weights of emulsion containing no tree essential oil component S added thereto. The adhesive for veneering was adjusted by mixing parts.

After applying with an adhesive application amount of 100 g / m ² , if the thickness was 0.22 mm, a single-name wood veneer was bonded and hot pressed with a hot press. As the hot pressing conditions, the hot pressing was performed at a pressing temperature of 100 ° C., a pressing pressure of 7.0 kg / cm ² , and a pressing time of 60 seconds.

Next, the back surface coating layer 6 made of an essential oil emulsion was applied to the back surface of the base plate on which the decorative veneer had been applied, followed by surface coating. This step was the same as in Example 1. Therefore, the tree essential oil component S in the back coat layer 6 was 0.6 g / m ² per 1 m ^{2 of} the floor board in the same manner as in Example 1. Furthermore, since the surface coating process was the same as in Example 1, the weight ratio of the amount of hinokitiol added to the top coat (the same paint as in Example 1 and the same coating amount) was the same as in Example 1. And 0.125%.

At this time, the tree essential oil component S per 1 m ^{2 of} floor board added by the coating film was the same as in Example 1, and was about 0.01 g / m ² . . The total amount of wood essential oil components S per floorboard 1 m ² of Example 2, was about 6.21 g / ^{m 2.} In this way, a sample of Example 2 was produced. This was subjected to the test described below.

Comparative Example 1.
In addition, as a comparative example, a floor board of Comparative Example 1 was produced using an essential oil component-free emulsion as shown below. That is, similarly, 30 parts by weight of a modified latex resin, 30 parts by weight of a modified melamine resin, 22 parts by weight of flour as an extender, and 2 parts by weight of water are blended, and 16 weights of an emulsion not containing the tree oil component S is added thereto. Partly blended to prepare a decorative veneer adhesive for Comparative Example 1. This adhesive was also used as an adhesive for attaching an underlay sheet. Further, no hinokitiol was added to the top coat of the surface coating.

  The underlay sheet was not impregnated with the essential oil emulsion. Moreover, the tree essential oil component S was not added at all to the emulsion in the back surface coating agent. Other than this, the sample of Comparative Example 1 was prepared in exactly the same manner as in Examples 1 and 2, and subjected to the test described below.

About each sample floor board of the said Examples 1 and 2 and the comparative example 1, the tick proliferation suppression performance test, the antibacterial performance test, and the mold resistance performance test were implemented. The test results are shown in Tables 1 to 3.
(1) About a tick growth inhibitory performance test.
(Test method) A mushroom mite was used as an inspection mite, and a tick breeder was placed on the sample flooring and placed in a wet chamber. The environment in the wet chamber was adjusted to a temperature of 25 ° C. and a relative humidity of 75%. In such an environment, the state of tick proliferation was observed. The observation period was 4 weeks and 8 weeks after the start of installation.

  The outline of the tick breeder was as follows. Nine acrylic resin prisms with a thickness of 3 mm × length 30 mm × width 30 mm and a 30 mm square in plan view and a height (thickness) 3 mm are prepared, and the prisms are mounted on the sample flooring so that the height is 3 mm. I put it. Then, when the prism was viewed in plan, a circular through hole having a diameter of 10 mm was provided in the center portion in the height direction of 3 mm. A predetermined number of mites and their feed were placed in the through holes, and the top and bottom surfaces of the prisms provided with circular through holes were covered with Japanese paper. Since the prism is covered with Japanese paper, air containing phytoncide and moisture and moisture can pass through it, but mites themselves cannot escape.

The sample flooring materials of Example 1, Example 2, and Comparative Example 1 were cut into 190 mm × 190 mm squares, and a total of 9 sheets were prepared for each 3 sheets. Ninety leopard mites were also prepared. A total of nine mite breeding apparatuses were prepared for Example 1, 3 for Example 2, and 3 for Comparative Example 1. 190 mm square Example 1 and Example 2 sample flooring materials and Comparative Example 1 sample flooring material are installed one by one in each wet chamber, and 10 mushroom leopard mites and feed are placed on the acrylic resin prisms. Were placed one by one on a floor board sample in each wet chamber. In this manner, the total number of ticks immediately after the start of the experiment, after 4 weeks and after 8 weeks was counted. Each of Examples 1 and 2 and Comparative Example 1 was tested in triplicate, and the average value is shown in Table 1.
(Table 1) Tick growth inhibitory performance test results. (Indicates by number of ticks)

(Unit, animals)
(Consideration of test results)
In the period from the start of the experiment to 4 weeks later, the growth of ticks was observed in both the samples of Examples 1, 2 and Comparative Example 1, but the sample of Example 1 was suppressed to about 66% of the sample of Comparative Example 1. It was done. The sample of Example 2 was suppressed to about 60% of the sample of Comparative Example 1. In the period from 4 weeks to 8 weeks, the sample of Comparative Example 1 continued to grow, but the samples of Examples 1 and 2 clearly had a reduced mite number and an inhibitory effect was observed. In the sample of Example 1, the number of ticks after 8 weeks decreased by about 14% compared to the number of ticks after 4 weeks. In addition, the number of ticks after 8 weeks in the sample of Example 2 was reduced by about 24% compared to the number of ticks after 4 weeks. Compared to Example 1, the sample of Example 2 has a slightly better mite suppression performance because the essential oil component concentration per unit area of the sample floor board is about 20% in Example 2. This is probably due to the high price.
(2) About antibacterial performance test.
(Test method) JIS, Z, 2801 (2000) Antibacterial processed product-Antibacterial test method, carried out according to the antibacterial effect.

  As test samples, both the samples of Examples 1 and 2 and the sample of Comparative Example 1 were obtained by removing the substrate plywood and the veneer veneer and using the surface coating film for the test. The reason for removing the base material plywood and the decorative veneer part is that bacteria enter the woody part and cannot be recovered.

  The surface coating film to which hinokitiol was added was solidified into a film and used as samples of Example 1 and Example 2. The amount of hinokitiol added was 20 g of hinokitiol with respect to 16 kg of the coating resin (weight ratio of the amount added was 0.125%). The amount of hinokitiol added was the same as the sample of Example 2 and the sample of Example 1. A sample of Comparative Example 1 was prepared in the same manner as in Examples 1 and 2 except that no hinokitiol was added.

As described above, the samples of Examples 1 and 2 and the sample of Comparative Example 1 were prepared, and the bacterial solution was sprayed on them, and the sprayed bacterial solution was collected and tested according to JIS, Z, and 2801. The results are shown in Table 2.
(Table 2) Antibacterial performance test results. (Indicated by viable count)

(Unit) Number of viable bacteria per test piece (consideration of test results)
As can be seen from the above test results, the samples of Examples 1 and 2 in which 0.125% by weight of hinokitiol as an antibacterial agent was added to the overcoating paint in both cases of Escherichia coli and Staphylococcus aureus. No viable cell count was detected after 24 hours at 35 ° C. However, in the sample of Comparative Example 1, the number of viable bacteria is clearly increased. In the case of Escherichia coli, the increase is about 5 times, and in the case of Staphylococcus aureus, the increase is about 1.6 times.
(3) About mold resistance performance test.
(Test method) As a mold resistance performance test, it was carried out according to JIS, Z, 2911 (1981) Mold resistance test method. Table 3 shows the results of testing the sample floor materials of Examples 1 and 2 and the sample floor material of Comparative Example 1.
(Result display method)
For the mold resistance performance, the evaluation was a three-level evaluation. The best mold resistance performance was 3, 3 was slightly better, and 1 was defective.
(Evaluation criteria)

Table 3 shows the mycelial growth of the flooring samples of Examples 1 and 2 and Comparative Example 1 after 14 days of mold culture and 28 days of mold culture.
(Table 3) Mold resistance performance test results.

(Consideration of test results)
When comparing the flooring material samples of Examples 1 and 2 and the flooring material sample of Comparative Example 1, the samples of Examples 1 and 2 were compared not only on the surface of the flooring material sample but also on the side surfaces. It can be seen that there is an effect of suppressing mycelial growth in comparison with the sample. In either case, there is a difference of 1 or more in the mold resistance performance evaluation value, and it can be seen that the flooring samples of Examples 1 and 2 are effective for suppressing the growth of mold. Moreover, compared with the flooring sample of Example 1, the flooring sample of Example 2 is slightly superior in mold resistance performance. This is because the concentration of the essential oil component per unit area of the sample floor board is the example. It is thought that 2 is about 20% higher.
(Sustained release test)
Next, the floor board samples of Examples 1 and 2 were tested for long-term sustained release of the essential oil component. The test results are shown in Table 4.
(Test method)
24 floor samples of Examples 1 and 2 each having a thickness of 12 mm, a width of 303 mm, and a length of 1818 mm were prepared as test floor plates. A room with a size of 8 cm having a floor joist floor foundation was prepared, and the 24 floor board samples of Example 1 and Example 2 were respectively constructed on the joists. The room temperature was constant at 20 ° C. The ventilation frequency of the room was 0.6 times / hour. The ventilation frequency here is the number of times the room air is completely renewed per unit time. And the air | atmosphere density | concentration (unit: ppb) of the essential oil component (total terpene amount) in the time of elapsed days passed was measured.

The method for measuring the concentration of the essential oil component in the air was to adsorb the indoor air to the TENAX-GC tube, and then quantitatively analyze it by gas chromatography-mass spectrometry to obtain an actual measurement value.
(Table 4) Essential oil component sustained release test results.

(Consideration of test results)
The floorboard samples of Examples 1 and 2 show values of 13 ppb in Example 1 and 16 ppb in Example 2 even after about 6 months. Further, after about one year, Example 1 shows a value of 7 ppb and Example 2 shows a value of 8 ppb. Furthermore, the value of Examples 1 and 2 after 1000 days (less than about 3 years) shows 2 ppb, and it can be seen that the essential oil component is gradually released over such a long period.

DESCRIPTION OF SYMBOLS 1 Wood floor board 2 Base material 3 Underlay sheet 4 Makeup veneer 5 Surface coating film 6 Back surface coating layer 7 Adhesive layer for sheet sticking 8 Adhesive layer for veneer sticking 9 Fitting convex part 10 Fitting concave part S Tree essential oil component

Claims (3)

The backside coating layer, base material, adhesive layer for sheet pasting, underlay sheet, adhesive layer for pasting veneer, veneer veneer, and surface coating layer, each of which is constructed in this order from the back side of the wooden floorboard In the floor board, a wood floor board comprising a tree essential oil component, wherein a tree essential oil component is contained in at least an adhesive layer for attaching a single plate or an underlay sheet among the respective layers. The wood floor board containing a tree essential oil component according to claim 1, wherein the layer containing the tree essential oil component is a three-layered structure including an adhesive layer for attaching a single plate, a surface coating film, and a back surface coating layer. The wood floor board containing a tree essential oil component according to claim 1, wherein the layer containing the tree essential oil component is a three-layered structure of an underlay sheet, a surface coating film, and a back coating layer.

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