JPH10146939A - Manufacture of decorative laminated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of wrinkles, cracks, and the like in a recessed groove by sticking a decorative laminated material on the more outside surface than one circumference of the groove in the longitudinal direction of a decorative laminated material, and then sticking it on the inner wall surface of the groove, and subsequently sticking it more outside surface than the other circumference of the groove. SOLUTION: A decorative laminated material 4 spread over the woody foundation material 2 is stuck on the more outside surface than one circumference 3a of a recessed groove under upside compression by means of a compression roller A. In the next place, sticking is implemented under compression to the inner wall surface of the groove by means of compression rollers B-G. Upon compression, at first, the decorative laminated material 4 is compressed on one circumference 3a of the groove by means of the compression roller B provided on the downstream side toward the forwarding direction of the woody foundation material 2 of the compression roller A. The compression roller B in this state has a recessed groove 5 in conformity with the circumference 3a of its perimeter surface. By employing a compression roller having a surface configured correspondingly to this sticking surface, wrinkles or cracks can be prevented from occurring in the groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a decorative board, and more particularly, to a method for manufacturing a decorative board, a so-called wrapping product, in which a sheet-like decorative material is adhered to a wooden substrate.

[0002]

2. Description of the Related Art As wood resources decrease year after year, wrapping products are made of MDF, laminated wood, plywood, etc. obtained by using renewable tree species, and a sheet-like decorative material is formed on the surface thereof. Although the material is adhered, its demand has been particularly increasing in recent years due to its excellent surface cosmeticity and uniformity. As a method for manufacturing such a wrapping product, for example, a method described in Japanese Patent Publication No. 57-5183 is known. The method for manufacturing a decorative board described in the publication, a substrate having a groove in the longitudinal direction on the surface, first, a sheet-like material is stuck in the groove using a groove pressing roll, then flat roll It is attached to the surface of the substrate, and finally to the side surface of the substrate.

[0003]

However, in the method of manufacturing a decorative board described in the above publication, it is difficult to adjust a pressure bonding roll for pressing a concave groove, and wrinkles of the decorative material are generated in the concave groove.
In particular, when a veneer sheet is adhered, there are disadvantages such as cracks occurring in the concave grooves. Further, when the shapes of the concave groove portion and the groove pressing roller are not substantially synchronized with each other, there is a problem that unevenness in press-fitting is likely to occur, and therefore, the shape accuracy of the groove pressing roller is required. Furthermore, there is a problem that the shape and dimensional accuracy of such a groove groove pressure-bonding roll tends to be reduced during use, and the roll needs to be frequently replaced. In addition, a flat roll that is attached to the surface of a substrate also has a problem that deformation is likely to occur at a portion corresponding to the groove.

[0004] Accordingly, an object of the present invention is to provide a decorative plate which can produce a decorative plate having an extremely good appearance without requiring skill in adjusting the pressure roll, without causing wrinkles and cracks in the concave grooves. An object of the present invention is to provide a method for manufacturing a plate.

[0005]

According to the present invention, a sheet-like decorative material is adhered to a wooden base material having a groove in a longitudinal direction on the surface thereof while continuously pressing the sheet-like decorative material along the direction of the groove. In the method of manufacturing a decorative board, the decorative material is first attached to a surface outside one edge of the groove, and then attached to the inner wall surface of the groove, and then the other of the grooves is used. The above object has been attained by providing a method for producing a decorative board, characterized in that the decorative board is attached to a surface outside the edge portion of the decorative board.
Further, in the invention according to claim 2, in the invention according to claim 1, when attaching the decorative material to the inner wall surface of the concave groove, the decorative material is moved from one edge of the concave groove to the other. The above object has been attained by providing a method for manufacturing a decorative board, characterized in that the decorative board is sequentially adhered over the edges of the decorative board.
In addition, the invention according to claim 5 is a decorative plate which is attached to a wooden base material having a concave groove in a longitudinal direction on a surface thereof while continuously pressing a sheet-like decorative material along the direction of the concave groove. In the manufacturing method, a sealer is applied to the inner wall surface prior to attaching the decorative material to the inner wall surface of the concave groove, and the decorative material coated with the adhesive is applied to the wooden base material coated with the sealer. The above object has been achieved by providing a method for manufacturing a decorative board characterized by the following.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method for producing a decorative board according to the present invention will be described below with reference to the drawings. FIG.
Is an embodiment of the method for producing a decorative plate of the present invention,
It is a schematic explanatory drawing which shows the arrangement | positioning of a pressure bonding roll, and a pressure bonding order. FIG. 2 is a perspective view showing a state where a decorative material is stuck to a wooden base material. FIG. 3 is a cross-sectional view of the wooden base material with the decorative material adhered thereto. In the method for manufacturing a decorative board of the present embodiment, a sheet-like decorative material is adhered to a wooden base material having a concave groove in a longitudinal direction on a surface thereof while continuously pressing a sheet-shaped decorative material along the direction of the concave groove. The decorative board 1 is manufactured.

The wood substrate 2 in this embodiment is a long substrate provided with a single groove 3 extending in the longitudinal direction on the surface thereof. The wood base is not particularly limited, but may be MD
F, laminated wood and plywood. As shown in FIG. 3, the concave groove 3 has a pair of edges 3a, 3e forming a boundary with the surface of the wooden substrate 2, a bottom surface 3c, and the bottom portions 3c from the edges 3a, 3e. Groove side surfaces 3b on both sides constituting
3d. Wooden base material 2 having such concave grooves 3
Is a transport means (not shown) provided in the wrapping device
Is conveyed in the longitudinal direction. As shown in FIG. 2, a sheet-like decorative material 4 is spread on the wooden base material 2 to be conveyed so as to cover the entire surface thereof, and the decorative material 4 is spread by a plurality of pressure rolls arranged at fixed positions in the conveying direction. The material 4 is attached. FIG. 3 shows a state in which the decorative material 4 has already been stuck.

In the method for manufacturing a decorative board according to the present invention, as shown in FIG. 1, the decorative material 4 is first adhered to the surface 2a outside the one edge 3a of the groove. You. The sticking is performed by pressing the decorative material 4 spread on the wooden substrate 2 from above with the pressure roll A.
Then, bonding is performed by pressure bonding to the inner wall surface of the concave groove by the pressure bonding rolls BG. At the time of press-fitting of the concave groove to the inner wall surface, first, a decorative material is applied to one edge 3a of the concave groove by the press roll B provided downstream of the press roll A in the transport direction of the wooden substrate 2. 4 is crimped. Crimping roll B
Is the edge 3a which is a sticking surface even if the surface is smooth.
May have a roll surface of a shape corresponding to the above. As shown in FIG. 1, the pressure bonding roll B in this embodiment has a concave groove 5 synchronized with the edge 3a on the peripheral surface thereof. By employing a pressure roll having a roll surface having a shape corresponding to the bonding surface, such as the pressure roll B, for applying the decorative material to the inner wall surface of the groove 3, wrinkles and cracks are generated in the groove. Can be further prevented, and a decorative board having a more excellent appearance can be manufactured. In addition, at the same time that the pressing roll B presses the edge 3a, another pressing roll B ′ presses the position from the side surface 2c of the wooden base material to the pressing position of the pressing roll B. This is because a favorable tension is applied to the decorative material 4 between the pressure-bonding rolls B and B ′, thereby forming a good sticking surface.

[0009] Next, pressure bonding at the concave groove side surface portion 3b is performed by a pressure bonding roll C provided downstream of the pressure bonding roller B in the transport direction. The pressure-bonding roll C has a concave groove 6 on the surface of the roll that is tuned to the shape of the inner wall surface of the concave groove extending from the lower portion of the edge 3a, which is the bonding surface, to the concave groove side surface 3b. At the same time as the pressure bonding by the pressure bonding roll C, the side surface corner 2d of the base material is pressure bonded by the pressure bonding roll C ′.

Further, the concave groove side surface portion 3b and the bottom surface portion 3c
At the boundary with the pressure-bonding roll D having a substantially rhombic cross section. The pressure roll D has a peripheral surface that is sharper than the angle formed by the concave groove side surface portion 3b and the bottom surface portion 3c so as to correspond to the shape of the boundary portion that is the bonding surface. The sharp peripheral surface 7 reliably presses the boundary portion, thereby preventing the occurrence of defects such as floating at the boundary portion. In addition, by using such a pressure-bonding roll, it is possible to continue good bonding even if the shape and dimensions slightly change during use. Crimping roll D, Crimping roll C
It is provided downstream in the direction of transport of the wooden base material 2. Simultaneously with the pressing of the pressing roll D, the side surface portion 2c of the wooden substrate is pressed by the pressing roll D '. Bottom part 3c
Is pressed by a pressure roller E having the same width as the distance w between two boundary portions between the concave groove side surfaces 3b and 3d and the bottom surface 3c. At the same time as pressing by pressing roll E, lower side 2
The pressing at e is performed by a pressing roll E ′.

A boundary portion between the bottom surface portion 3c and the other concave groove side surface portion 3d, the other concave groove side surface portion 3d, and the other edge portion 3
Similarly, for e, the bonding is performed using the pressure-bonding rolls F to H each having a suitable surface shape at each site similarly provided sequentially in the transport direction of the wooden base material 2. In this manner, the decorative material 4 is sequentially attached to the inner wall surface of the groove from one edge 3a to the other edge 3e of the groove.
At the same time as the pressing by the pressing rolls F, G, and H, the pressing of the predetermined position of the wooden base material side surface portion 2c is performed by the pressing rolls F ', G', and H ', respectively.

After the attachment to the inner wall surface in the groove is completed, the decorative material 4 is attached to the surface 2f outside the other edge 3e of the groove. Attachment to the outer surface 2f is performed first by the press roll I, and then by the press rolls J and K outside the press position of the press roll I. Further, the side surface corner 2d is pressed by the pressure roll L, the center of the side surface is pressed by the pressure roll M, and the lower side surface is pressed by the pressure roller N. The transport of the wooden substrate 2 in the present embodiment can be performed by, for example, rotationally driving a side roll for material feeding that comes into contact with the wooden substrate or the wooden substrate coated with the decorative material from the side. 1 and 2, the illustration of the side roll for material feeding and the lower mechanism for material feeding is omitted.

In this manner, the decorative material 4 is applied to the wooden substrate 2 over its entire length, and a decorative plate having an extremely good surface appearance, a so-called wrapping product, is manufactured. Such decorative boards are cut into appropriate lengths and used for manufacturing various products such as working materials and furniture.

Further, the manufacturing conditions and the like in the method for manufacturing a decorative board of the present invention will be described. The decorative material in the present invention is preferably any of a veneer, a vinyl chloride resin sheet, an olefin-based synthetic resin sheet, and paper. By employing these, it is possible to provide a decorative material having particularly excellent design properties. As the tree species of the veneer, a tree having a relatively thick conduit is preferable, and white oak, red oak and ash are particularly desirable for reasons of design, veneer processing, lapping, and the like. According to the method for manufacturing a decorative board of the present invention, wrinkles and cracks are liable to occur in the conventional manufacturing method, and it is therefore difficult to manufacture a decorative material having a good appearance. Can be adopted.

The thickness of the veneer is 0.15 mm or more and 0.30 m
m or less, more preferably 0.19 mm or more and 0.25 mm or less. If it is less than 0.15 mm, the bending and tensile strength of the veneer itself will be extremely reduced, and when sticking with a wrapping machine, there is a problem that the sheet of the veneer is cut or torn due to its tension,
If the thickness exceeds 0.30 mm, the strength of the veneer sheet itself becomes too large, and in the lapping process, problems such as cracking and tearing of the veneer portion and floating after sticking due to repulsive force occur.

Examples of the vinyl chloride resin sheet include a doubling emboss, which is a typical processing method, and a wiping sheet used for housing members. The thickness is preferably 0.15 mm or more and 0.20 mm, and 0.16 mm or more.
mm or more and 0.18 mm or less is more desirable. 0.15m
If it is less than m, the strength of the vinyl chloride resin sheet itself is reduced as in the case of the veneer, and there is a problem that the sheet is cut or torn, and if it exceeds 0.20 mm, the strength of the vinyl chloride itself increases. After sticking to the surface, problems such as floating due to repulsive force occur.

Regarding the olefin-based synthetic resin sheet,
Like the vinyl chloride resin sheet, the thickness is 0.1
5 mm or more and 0.20 mm are desirable, and 0.16 mm or more and 0.18 mm or less are more desirable. If the thickness is less than 0.15 mm, the strength of the olefin-based sheet itself is reduced, so that problems such as cutting of the sheet occur. 0.20mm
When the value exceeds, the strength of the olefin-based sheet itself is increased, so that problems such as floating due to repulsion after sticking to the base material occur.

The thickness of the paper is preferably from 0.08 mm to 0.15 mm, and from 0.10 mm to 0.12 mm.
mm or less is more desirable. If the thickness is less than 0.08 mm, the bending and tensile strength of the paper sheet itself is extremely reduced, which may cause the sheet to be cut or torn. If the thickness exceeds 0.15 mm, the strength of the paper sheet itself may increase. After sticking to the material, problems such as floating due to repulsive force occur. Thus, in the invention according to claims 1 to 3, the decorative material has a thickness of 0.15 mm or more and 0.30 mm or less, a thickness of 0.15 mm or more and a thickness of 0.15 mm or less.
Vinyl chloride resin sheet of 20 mm or less, thickness 0.1
It is preferably any one of a sheet made of an olefin-based synthetic resin having a thickness of 5 mm or more and 0.20 mm or less, and a paper having a thickness of 0.08 mm or more and 0.15 mm or less.

In the method for producing a decorative board according to the present invention,
Adhesive is applied to the surface that is in contact with the wood substrate
After that, the decorative material is adhered to the wooden substrate.
Is preferred. As the adhesive, a two-part curable urethane
-Based resin adhesive, 1-curable urethane-based resin adhesive, hot
Melt resin adhesive, reactive hot melt resin adhesive
Among them, two-part curable urethane
Resin adhesive, hot melt resin adhesive, reactive resin
A melt-based resin adhesive can be preferably used. Also,
In this case, the entire inner wall surface of the groove should be
It is preferable to apply a sealer to the body. Sealer
Improves strength with wood substrate surface by applying
To improve the bond strength between the surface of the wooden substrate and the decorative material.
Effect, and the surface is smooth and designed.
That it is possible to manufacture a decorative board with extremely excellent properties
The effect is achieved. Accordingly, the present application is directed to a method according to claim 5.
A method for manufacturing a decorative board is provided.
In the method for producing a decorative board according to the above, the decorative material is
Apply a sealer to the inner wall surface before attaching to the inner wall surface
And applying an adhesive to the wooden substrate coated with the sealer.
For producing a decorative board, characterized in that a decorative material is crimped.
It also provides. As the type of the above sealer
Can be used generally known various,
Moisture-curable urethane resin paint, two-component curable urethane resin
Resin paint, acrylic resin paint, epoxy resin paint, etc.
Can be preferably used. Sealer application amount and
Is 4 to 10 g / m^TwoIs preferable, and especially 6 to 7 g /
m ^TwoIs preferred. 4 g / m coating amount^TwoIf it is less than
The above effects can be expected
10g / m^TwoOver the wood substrate
Anchor effect cannot be expected, and remains in the adhesive
Solvent oozes out, especially vinyl chloride, which has very few voids in the sheet itself.
Resin sheet or olefin-based synthetic resin sheet
When used as a cosmetic material, there is a risk that defects such as swelling may occur.
There is ruggedness.

When a 0.21 mm thick tamping veneer is adhered to the MDF using a two-component curable urethane-based resin adhesive, the amount of the applied adhesive is 70 μm in the applicator gap.
m to 140 μm, drying zone temperature 30 ° C. to 80
° C or less and the lapping machine material feeding speed is 4 m / min or more and 40 m / min or less. More preferable coating amount is 90 μm or more and 120 μm or less in applicator gap, drying zone temperature is 45 ° C. or more and 65 ° C. or less, and lapping machine material feeding speed is 10 m / min or more and 30 m / min.
It is as follows.

If the gap between the applicators is 70 μm or less, the amount of coating will be insufficient, and there will be a problem that the adhesive strength will decrease due to overdrying adhesion or suction of the adhesive to the substrate. A large amount of solvent remains. In addition, an increase in the amount of the adhesive layer causes a problem such that the veneer returns due to a repulsive force. When the drying zone temperature is lower than 30 ° C., the solvent in the adhesive may be stuck without volatilizing sufficiently, and as described above, a large amount of the solvent remains in the adhesive, so that the sheet-shaped decorative material may be stuck. When the temperature exceeds 80 ° C., there is a problem that over-drying causes dry adhesion between the sheet-like decorative material and the base material.

When the lapping machine material feeding speed is less than 4 m / min, the adhesive applied to the sheet-like decorative material is passed through the drying zone for a long time, so that the adhesive is over-dried. Therefore, when the adhesive strength exceeds 40 m / min, the time required for the sheet-like decorative material coated with the adhesive to pass through the drying zone is shortened, and the solvent in the adhesive is less likely to evaporate. There is a problem that the sheet-like decorative material is lifted by the expansion of the solvent.

Further, a leister (a device for generating hot air)
It is also effective to treat as a cosmetic material. By performing the above conditions, it is possible to produce a wrapping product that has a good adhesive strength and a good appearance without peeling over a long period of time. Also, two-part curable emulsion-based resin adhesives can be wrapped under similar conditions,
Similar wrapping products can be produced.

The lapping machine material feed speed is 40
Even if it exceeds m / min, a wrapping product free from defects such as floating and cracking can be obtained by repeating the above-described arrangement and order of the rolls for pressure bonding. Furthermore,
Even if the shape of the groove of the wooden base material is an inverted R surface or a ginkgo surface,
Correspondence is also possible.

The method of manufacturing a decorative board according to the present invention is not limited to the above embodiment, and can be implemented with various design changes. For example, a wood substrate having a ginkgo-shaped groove in the longitudinal direction can also be suitably used. FIG. 4 shows a cross-sectional view of a decorative board 1 manufactured by attaching a decorative material 4 to a wooden base material 2 having a ginkgo-shaped concave groove 3 on the surface.

The sticking of the decorative material to the wood substrate having such a groove can be performed in the same manner as in the above embodiment. FIG. 5 shows the arrangement of the pressure rolls and the pressure bonding order in this embodiment. Also in this case, first, a decorative material (not shown) is attached to the surface 2a outside the one edge 3a of the concave groove by the pressure roll A. In this embodiment, the pressure roll A is attached to the surface 2
At the same time, a part of one edge 3a of the groove is also adhered. Next, the pressure roll B adheres another part of the edge 3a and the side surface of the concave groove. Thereafter, as shown in FIG. 5, the decorative material is sequentially adhered to the inner wall surface of the concave groove up to the other edge 3e of the concave groove 3 by the pressure rolls C to J, and the concave portions are further pressed by the pressure rolls J and K. The decorative material is stuck on the surface 2f outside the other edge of the groove 3. When the decorative material is adhered to the inner wall surface of the concave groove 3, each of the different adhering surfaces has a roll surface having a shape corresponding to the shape of the adhering surface, such as pressure bonding rolls B to J. A pressure roll is employed. In addition, the method for manufacturing a decorative board of the present invention may employ a wooden base material having a concave groove as an inverted R surface as shown in FIG. 6 in the longitudinal direction.

[0027]

EXAMPLES Examples of the method for producing a decorative board according to the present invention will be described below. Each of the wood substrates in each embodiment has a concave groove as shown in FIG. [Example 1] M from New Zealand as a wood substrate
DF (Tree species Radiata pine Scientific name Pinus rad
iata D.I. DON. 9mm thick, 45mm wide, 4,060mm long), veneer sheet as a decorative sheet (tree species Tamo Scientific name: Flaxinus mandhuri
ca RUPR. Thickness 0.22mm, width 75mm),
Using a two-part curable urethane resin adhesive as the adhesive, as shown in FIG.
m, a lapping machine drying zone set temperature of 50 ° C., and a lapping machine material feeding speed of 18 m / min.

[Example 2] MDF (Maritain pine, scientific name: Pinus) produced in Portugal as a wood substrate
maritima Mill. 9mm thick, 45m wide
m, length 4,060 mm), a vinyl chloride sheet (thickness 0.16 mm, width 75 mm) as a decorative sheet, and a two-component curable urethane resin adhesive as an adhesive.
As shown in the figure, using a general-purpose lapping machine in which pressure bonding rolls are arranged, the lapping is performed by applying an applicator gap of 80 μm, a lapping machine drying zone setting temperature of 41 ° C., and a lapping machine material feeding speed of 25 m / min. Obtained as a product.

[Example 3] MDF (tree species Radiata pine Scientific name: Pinu) from New Zealand as a wood base material
s radiata D.S. DON. Thickness 9mm, width 45
mm, length 4,060 mm), olefin synthetic resin sheet (polypropylene, thickness 0.16 as decorative sheet)
1 mm, width 75 mm), using a two-part curable urethane resin adhesive as an adhesive, as shown in FIG. Machine drying zone set temperature 43 ° C, lapping machine material feed speed 20m / mi
It was stuck under the conditions of n to obtain a wrapping product.

Example 4 MDF (Radiata pine scientific name: Pinu) from New Zealand as a wood base material
s radiata D.S. DON. Thickness 9mm, width 45
mm, length 4,060 mm), coated paper as a decorative sheet (thickness 0.15 mm, width 75 mm), 2 as an adhesive
As shown in FIG. 1, using a liquid-curable emulsion-based resin adhesive, as shown in FIG. 1, a general-purpose lapping machine in which a pressure roll was disposed was used. The applicator gap was 60 μm, the lapping machine drying zone set temperature was 73 ° C., and the lapping machine was used. It was adhered under the condition of a material feeding speed of 22 m / min to obtain a wrapping product.

[Evaluation] When the wrapping products obtained in Examples 1 to 4 were visually observed, no wrinkles or cracks were found in any of the examples.

[0032]

According to the method for producing a decorative sheet of the present invention, a decorative sheet exhibiting an extremely good appearance can be obtained without the need for skill in adjusting the roll for pressure bonding and without wrinkles or cracks in the concave grooves. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an arrangement of pressure rolls and an order of pressure bonding in one embodiment of a method for manufacturing a decorative board of the present invention.

FIG. 2 is a schematic perspective view showing a state in which a decorative material is stuck to a wooden base material.

FIG. 3 is a cross-sectional view showing a wooden substrate to which a decorative material is adhered.

FIG. 4 is a sectional view of a decorative board manufactured in one embodiment of the manufacturing method of the present invention.

FIG. 5 is a schematic explanatory view showing an example of an arrangement of pressure bonding rolls and an order of pressure bonding in a case where the decorative board of FIG. 4 is manufactured.

FIG. 6 is a cross-sectional view of a decorative board when a wooden base material having a concave groove having an inverted R surface is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative board 2 Wood base material 3 Concave groove 3a, 3e Edge 2a, 2f Outside surface of concave groove 4 Decorative material A-N Crimping roll

Claims (5)

[Claims] 1. A method for producing a decorative board, comprising: attaching a sheet-like decorative material to a wooden base material having a concave groove in a longitudinal direction on a surface thereof while continuously pressing a sheet-like decorative material along the direction of the concave groove. First, a cosmetic material is stuck on a surface outside one edge of the groove, then stuck on the inner wall surface of the groove, and then a surface outside the other edge of the groove. A method for producing a decorative board, characterized in that the decorative board is attached to a decorative board. 2. The method according to claim 1, wherein the step of attaching the decorative material to the inner wall surface of the groove includes sequentially applying the decorative material from one edge to the other edge of the groove. A method for producing a decorative board according to claim 1. 3. When attaching the decorative material to the inner wall surface of the concave groove, using a pressure roll having a roll surface having a shape corresponding to the shape of the sticking surface with respect to a different sticking surface. The method for producing a decorative board according to claim 1, wherein the decorative board is attached. 4. The decorative plate according to claim 1, wherein the decorative material is any of a veneer, a vinyl chloride resin sheet, an olefin-based synthetic resin sheet, and paper. Production method. 5. A method for manufacturing a decorative board, comprising: attaching a sheet-shaped decorative material to a wooden base material having a concave groove in a longitudinal direction on a surface thereof while continuously pressing a sheet-like decorative material along the direction of the concave groove. A decorative plate characterized in that a sealer is applied to the inner wall surface before the decorative material is attached to the inner wall surface of the concave groove, and a decorative material coated with an adhesive is applied to the wooden base material to which the sealer is applied. Manufacturing method.