JP2005297359A - Method for treating surface of woody board and woody board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent burrs from being generated when a hole is perforated in a woody board. <P>SOLUTION: In this method for treating the surface of a woody board, tropical wood 12 as a surface layer of a plywood 10 is reinforced by laminating paper 14 on the plywood 10, impregnating the paper 14 with a resin, and curing the resin. Therefore, the fiber of the tropical wood 12 as the surface layer is not torn apart significantly when the wood is bore or notched by a router or the like. Also the cut edge does not suffer generation of burrs and the paper 14 does not peel during boring work with the router or the like. In addition, the paper 14 has only to be laminated on the entire surface of the plywood 10, so that no problem occurs with regard to the slipping out of place of the paper 14. Also the woody board is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a surface treatment of a wood board.

  The main body of the game board used for pachinko machines, etc. is made of wood-based plywood such as beech plywood, beech-southwood composite plywood, etc., with a decorative sheet (so-called cell board) attached to the front of the plywood Yes. The game board is provided with a through hole for attaching a winning device, a display device, electrical decorations, etc., a hole or a groove for guiding a winning ball or an out ball, and the like by cutting.

These holes and the like are cut by a router, and the machining direction is usually the direction from the back to the front.
When cutting with this router, there was a problem that burrs occurred on the back of the game board. In addition, burr | flash was prevented by the cell plate currently stuck on the front side, and it did not generate | occur | produce.

Burrs generated by router processing have to be removed with a file or a cutter, which is very time consuming, has poor work efficiency, and increases manufacturing costs. A technique for preventing the generation of burrs has been proposed by applying to a router and processing a router (Japanese Patent Laid-Open No. 11-216231).
JP-A-11-216231 (paragraphs 0005 to 0006)

  Since the sheet member used in the technique of Patent Document 1 is hardened by the impregnated resin, the sheet member may be broken during the bonding operation. Also, it may break during handling during transportation and storage.

  In other words, the construction in which the sheet member impregnated with resin is adhered to the back surface of the game board is very poor in workability and is not suitable for mass production. When paper (particularly, thin paper) is used as the sheet member, it is cracked and this problem is particularly remarkable.

Moreover, even if a sheet member that is difficult to break is used, there is a possibility that a positional shift may occur when the sheet member is stuck.
These problems are not limited to game boards, but exist in the same way when processing general wood boards.

The surface treatment method for a wooden board according to claim 1,
Paste paper on one or both sides of the wooden board,
After impregnating the affixed paper with an active energy ray curable resin or a thermosetting resin,
The active energy ray-curable resin or thermosetting resin is cured.

The wood board is a board made of wood as a raw material, and examples thereof include a single board, a plywood board, and an aggregate material.
When paper is pasted on one or both sides of a wooden board and the pasted paper is impregnated with an active energy ray-curable resin or thermosetting resin and cured, the paper is pasted when cutting with a router or the like. On the surface, the fibers of the plywood are not severely torn, and burrs are not generated at the cut surface by a router. Therefore, it is not necessary to remove the burrs with a file.

  In general, this surface treatment is preferably applied to both sides, but depending on the use of the wooden board, for example, when a cell board is affixed to one side, such as a game board, it may be applied only to one side. Good.

  Paste paper on one or both sides of the wood board, impregnate the pasted paper with active energy ray curable resin or thermosetting resin, and then cure the impregnated active energy ray curable resin or thermosetting resin. Therefore, the bonding operation is extremely easy, and there is no risk of the paper being damaged by this operation.

  Also, since the paper is pasted on the plywood, that is, in a stable state where the paper is not bent or deformed, the paper is impregnated with an active energy ray curable resin or a thermosetting resin and cured. The paper will not break later.

  Moreover, the paper can be pasted before cutting the wood board as a raw material to the required dimensions, and the resin impregnation and curing can be performed before cutting as well (after paper pasting, resin impregnation and curing after cutting). Needless to say, it is possible to do this.) Moreover, if paper is pasted on the wood board before cutting in this way, there is no possibility that the paper pasting position is deviated from the outer shape of the board.

  Also, when paper is pasted on the surface, and this is cured by applying an active energy ray-curable resin or thermosetting resin, this cured resin-impregnated paper prevents moisture absorption of the wood board, so the warp is good There is also an effect to prevent. In particular, when the plates are stacked and stored in a state where the resin-impregnated paper is cured, moisture absorption is performed only at the end of the tree, so that warpage due to moisture absorption can be prevented very well.

  The kind (paper quality) of the paper stuck on the surface of the wood board is not limited as long as it can be impregnated with an uncured active energy ray curable resin or a thermosetting resin. Also, printed paper may be used. For example, it is possible to give originality by using paper on which a company name, a logo mark, or the like is printed.

  Also, the thickness of the paper is not particularly limited, but the effect is not improved as the thickness is increased, and it is uneconomical to increase the thickness too much. On the other hand, in the case of thinning, the possibility that the effect is not obtained due to being too thin is small, and since the thinner is more economical, the thickness can be boldly reduced.

  There is no particular limitation on the adhesive (paste) used when sticking the paper to the wooden board, for example, it may be selected according to the paper quality, but an adhesive for woodworking such as vinyl acetate is easily available, It is suitable because it is relatively easy to handle.

  There is no limitation on the method of impregnating the paper stuck to the wood board with the active energy ray-curable resin or the thermosetting resin, and the paper may be applied by a known method such as a brush, a roll coater, or a spray.

Its impregnation amount is not be determined uniformly because it depends on the type of resin, etc., generally 20g / m ² ~50g / m ² is preferred.
The lower limit (20 g / m ² ) is the minimum amount of impregnation required to make the surface of the wood board strong enough to withstand cutting by a router or the like and not generate burrs. There is a fear. However, even if the value is slightly below this value, burrs do not occur suddenly, and are values that allow for some margin.

On the other hand, the upper limit (50 g / m ² ) is not inconvenient even if it exceeds this value, but even if an amount higher than this is applied, the effect is not improved (strength is further increased) and it is not economical. This is the value set.

Although it is repeated, it is not uniform depending on the type of resin and so on, and it is desirable to determine a suitable coating amount by experiment.
The resin that is impregnated into paper and cured is an active energy ray curable resin or a thermosetting resin, but considering the device configuration for curing, the time required for curing, etc., it takes a short time by irradiation with active energy rays. An active energy ray-curable resin that cures reliably (for example, in about 2 seconds) is excellent.

  An active energy ray-curable resin is a composition that undergoes a polymerization reaction and cures when irradiated with active energy rays such as light (ultraviolet rays, near infrared rays) or an electron beam. Depending on the active energy rays suitable for the curing reaction, For example, it is classified into an ultraviolet curable type, a near infrared curable type, and an electron beam curable type. Moreover, according to the kind of resin, it classify | categorizes into an epoxy type, a vinyl ester type, an acrylic type etc., for example. Specific product examples include Lipoxy series from Showa Polymer Co., Ltd. (Near infrared curable types include trade names: Lipoxy LC-3304, LC-720, etc., and UV curable types), Hitachi Chemical Co., Ltd. There are company's Hitaloid series (ultraviolet curing type, trade name: Hitaroid 7851 etc.), Ultra V series (UV curing type), etc.

  In the present invention, it can be used regardless of the curing type (active energy ray) or the type of resin, but it can be cured with ultraviolet rays or near infrared rays because the equipment for curing is simple and safety measures are not strict. A photocurable resin is preferred.

Thermosetting resins are compositions that cure by heating, and are known to be phenolic or melamine based.
Needless to say, the treatment for curing the impregnated resin is selected according to the type of resin (curing type).

  The wood board according to claim 2 is characterized in that a paper is pasted on one or both sides of the wood board, and the paper is impregnated with an active energy ray curable resin or a thermosetting resin. An effect is obtained.

  The wood board according to claim 3 is a wood board according to claim 2, wherein a photo-curing resin is adopted as the active energy ray-curable resin, so that the equipment for curing is simple and safety measures are taken. Is not too strict.

  Claims 4 and 5 show good examples of the photocurable resin. In the wood board according to claim 4, an ultraviolet curable resin is used as the active energy ray curable resin, and the wood of claim 5. In the plate, a near infrared curable resin is employed as the active energy ray curable resin.

Next, the best mode for carrying out the invention will be described by way of examples of the present invention.
As shown in FIG. 1, a plywood 10, which is a kind of wood board, is a plywood composed of a beech material 11 at the center and a south sea material 12 at the top and bottom.

As shown in FIG. 1, a paper 14 is attached to one side of the plywood 10 and the adhesive is dried.
Next, an ultraviolet curable resin (Ultra V series from Gengan Chemical Co., Ltd.) is applied by a roll coater in an amount of 30 g / m ² and impregnated into the paper 14, and then the plywood 10a is irradiated with an ultraviolet irradiation device (not shown). ) And irradiating with ultraviolet rays to cure the impregnated resin. The irradiation conditions of ultraviolet rays followed the recommended irradiation conditions of the ultraviolet curable resin used.

The structure of the plywood 10 after curing is as shown in FIG. A part of the ultraviolet curable resin penetrates the paper 14 and reaches the surface of the plywood 10 and is cured.
The surface treatment by applying the paper 14, applying the resin, and curing may be performed on only one side, but preferably is performed on both sides. When performing surface treatment on both sides, after performing surface treatment on one side as described above, surface treatment is also performed on the remaining surface in the same procedure. As a result, the structure shown in FIG. 3 is obtained.

After the plywood 10 that has been surface-treated on one side or both sides is cut to a required size (or without being cut), for example, a cutting process is performed by a router to provide holes, notches, dowel holes, and the like.
The surface of the plywood 10 is provided with a coating layer obtained by impregnating the cured paper 14 with an ultraviolet curable resin and cured, and the surface of the surface south sea material 12 is reinforced by the coating layer. In addition, the fiber of the southern sea material 12 that is the surface layer is not torn greatly when drilling holes or notches by a router or the like, and no burr is generated at the cut surface by the router or the like. Therefore, it is not necessary to remove the burrs with a file after the drilling process.

  Since part of the ultraviolet curable resin penetrates the paper 14 and reaches the surface of the plywood 10 and is cured, the generation of burrs can be better prevented. Further, there is no problem that the paper 14 is turned during the drilling process by a router or the like.

Even if a new step of attaching the paper 14, impregnation and curing of the resin is required, the workability is good and the cost is low as compared with the case of attaching the sheet member impregnated with the resin.
Further, since the paper 14 is pasted over the entire surface of the plywood 10 and impregnated with the resin and cured, the sheet member is impregnated with the resin, and is the same as the paper 14 impregnated with the resin over the entire surface of the plywood 10. The problem of misalignment that occurs when sticking is not caused.

  And since the resin-impregnated paper layer 14 is stuck on the entire back surface of the plywood 10, the resin prevents moisture absorption of the plywood 10, so that the warp of the plywood 10 is well prevented. Since warpage is prevented in this way, it is possible to prevent the occurrence of defective products due to warpage.

In addition, since a photo-curing resin is employed, the equipment for curing is simple, and safety measures are not strict.
As mentioned above, although embodiment of this invention was described according to the Example, this invention is not limited to such an Example, and it cannot be overemphasized that it can implement variously in the range which does not deviate from the summary of this invention.

  For example, in the embodiment, a plywood in which beech wood and south seawood are combined is used.

The schematic diagram explaining the layer structure of the plywood used in the Example. The schematic diagram explaining the layer structure after sticking paper on a plywood and impregnating resin. The schematic diagram explaining the layer structure after sticking paper on both surfaces of a plywood and impregnating with resin.

Explanation of symbols

10 Plywood 11 Beech wood 12 South sea wood 14 Paper

Claims (5)

Paste paper on one or both sides of the wooden board,
After impregnating the affixed paper with an active energy ray curable resin or a thermosetting resin,
A method for treating the surface of a wooden board, comprising curing the active energy ray-curable resin or thermosetting resin. Paper is pasted on one or both sides of the wooden board,
A wood board, wherein the paper is impregnated with an active energy ray-curable resin or a thermosetting resin. In the wood board of Claim 2,
The wood plate, wherein the active energy ray curable resin is a photocurable resin. In the wood board of Claim 3,
The wood board, wherein the active energy ray curable resin is an ultraviolet curable resin. In the wood board of Claim 3,
The active energy ray-curable resin is a near-infrared curable resin.

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