JP2004181147A - Decorative sheet of game board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet of a game board with high wear resistance to generate little static electricity and little dioxins when burned. <P>SOLUTION: This decorative sheet 50 is disposed on the front surface of the game board of a pinball game machine. The decorative sheet 50 comprises a paper base material (a first woodfree paper sheet 51 and a second woodfree paper sheet 52) and a surface resin layer 56 made of a crosslinked material of an ionizing radiation hardenable resin containing inorganic particles to form the most outer surface layer. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a decorative sheet disposed on a front surface of a game board of a ball game machine such as a pachinko machine.
[0002]
[Prior art]
As shown in FIG. 3, the base material 140 of the game board of the pachinko machine is formed of a plate material such as a veneer material, and a decorative sheet 150 is provided (sticked) on a front surface thereof.
[0003]
The conventional decorative sheet 150 has the following configuration.
The layer on the most front side of the decorative sheet 150 is a transparent synthetic resin plate 156 such as polypropylene or polyethylene terephthalate (PET), and a printed coating layer 154 is formed on the back surface of the synthetic resin plate 156 by printing. Is formed. In this manner, a predetermined pattern (pattern and color) is given to the synthetic resin plate 156.
A high quality paper 153 is adhered on the back side of the printed coating layer 154, a carbon ink layer 152 is provided on the back side, and a high quality paper 151 is adhered on the back side.
The thickness of the decorative sheet 150 is, for example, 0.2 mm to 0.5 mm, and the thickness of the synthetic resin plate 156 is, for example, 0.10 mm to 0.12 mm.
[0004]
[Problems to be solved by the invention]
By the way, in a pachinko machine, countless pachinko balls pass on the game board (decorative sheet) (front side). For this reason, a large frictional force is applied to the decorative sheet.
However, in the above-mentioned conventional decorative sheet 150, the synthetic resin plate 156 does not have high abrasion resistance, so that the synthetic resin plate 156 gradually wears out over a long period of use, and eventually becomes partially printed. There is a disadvantage that the film layer 154 is exposed. In that case, the printed coating layer 154 is damaged, and the design of the game board is damaged.
[0005]
In the conventional decorative sheet 150, since the layer on the most front side is the synthetic resin plate 156, static electricity is generated when a myriad of pachinko balls pass over the game board (decorative sheet 150). It was easy. The carbon ink layer 152 is provided to prevent this, but its effect is limited. In addition, since static electricity is accumulated on the decorative sheet 150, dust and the like tend to adhere to the front surface of the decorative sheet 150, and there is a disadvantage that the decorative sheet 150 becomes unsightly to the player.
[0006]
Generally, in a pachinko parlor, after a pachinko machine has been used for a certain degree or more, the pachinko machine is replaced with a new pachinko machine.
When the used pachinko machine is incinerated, dioxin may be generated from the synthetic resin plate 156. Therefore, the synthetic resin plate 156 or the entire decorative sheet 150 is removed from the game board (pachinko machine). Need to be done.
However, the work of the removal is complicated.
[0007]
Therefore, an object of the present invention is to provide a decorative sheet for a game board, which has high abrasion resistance, generates less static electricity, and generates less dioxin during incineration.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is a decorative sheet provided on a front surface of a game board of a ball game machine, wherein the decorative sheet includes a paper base material and inorganic particles. A decorative sheet for a game board, comprising a crosslinked product of a radiation-curable resin and having a surface resin layer forming a layer on the most front side.
[0009]
In the decorative sheet of the game board of the above invention, the surface resin layer forming the layer on the most front side is made of a crosslinked product of an ionizing radiation-curable resin containing inorganic particles, so that it has high abrasion resistance and static electricity. The effect that generation is small is obtained. In addition, since sufficient strength can be obtained with the surface resin layer, only a paper base supporting the surface resin layer from the back side is sufficient as the other layer (the print coating layer is formed on the front surface of the paper base). May be formed), and the effect of generating less dioxin during incineration is also obtained.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
First, an outline of an example of a pachinko machine (ball game machine) will be described.
As shown in FIG. 1, this pachinko machine (ball game machine) has a housing 30, and a substantially vertical game board 10 is disposed inside the housing 30. On the front side of the game board 10, a glass window (not shown) is provided. Below the glass window (game board 10), a handle 12 and a winning ball payout device (not shown) are provided.
[0011]
The game board 10 is provided with an outer rail 15 and an inner rail 16, and the inside of the inner rail 16 is defined as a game area (omitted by reference numerals). Then, the pachinko ball shot by the player operating the handle 12 is guided to the game area.
[0012]
In the game board 10 (game area), a number of nails (not shown) and a windmill 26 are provided, and a plurality of normal winning openings 20 are provided. When a pachinko ball enters the normal winning opening 20, for example, six or thirteen pachinko balls are paid out from the prize ball payout device as prize balls.
[0013]
A center role object 28 is provided substantially at the center of the game board 10. A starting winning port 22 is provided below the center role object 28, and a large winning port 24 is provided below the starting winning port 22.
Then, when the pachinko ball enters the starting winning opening 22, the symbol on the display of the center role object 28 is displayed for a predetermined time, and then the final symbol is statically displayed. There are "winning" and "losing" in the symbols displayed statically, and in the case of "winning", the special winning opening 24 is opened a predetermined number of times. For example, it opens 16 times, and remains open until 10 pachinko balls are entered each time. Then, for one pachinko ball winning, 15 pachinko balls are paid out from the prize ball payout device as prize balls.
[0014]
Next, the game board 10 (decorative sheet 50) will be described in detail with reference to FIG.
As shown in FIG. 2A, the game board 10 has a base material 40. The base material 40 is formed of a plate material such as a veneer plate.
[0015]
A decorative sheet 50 is adhered to the front surface (front surface) of the base material 40.
As shown in FIGS. 2A and 2B, the decorative sheet 50 includes a first high-quality paper 51, a second high-quality paper 52, a print coating layer 54, and a surface resin layer 56 from the back side to the front side. Have.
The thickness of the decorative sheet 50 is, for example, 0.08 mm to 0.10 mm. The total thickness of the second high-quality paper 52, the print coating layer 54, and the surface resin layer 56 is, for example, 0.02 mm to 0.04 mm.
[0016]
The first high quality paper 51 and the second high quality paper 52 are adhered by an adhesive. The first high quality paper 51 and the second high quality paper 52 correspond to the paper base material of the present invention. It should be noted that after the printed coating layer 54 is formed on the second high quality paper 52 and the surface resin layer 56 is formed, it is adhered to the first high quality paper 51, After the paper 51 and the second high quality paper 52 are attached, the print coating layer 54 may be formed on the second high quality paper 52, and the surface resin layer 56 may be further formed.
[0017]
The print coating layer 54 is formed by printing on the front surface of the second high quality paper 52 (paper base). A predetermined design (pattern and color) is added to the front surface of the second high-quality paper 52 by the printing coating layer 54. The surface resin layer 56 has transparency, and the printed coating layer 54 (the pattern formed thereby) can be visually recognized from the front side of the decorative sheet 50.
[0018]
The surface resin layer 56 is formed of a crosslinked product of an ionizing radiation curable resin (composition) containing inorganic particles.
The surface resin layer 56 is formed by applying a liquidized ionizing radiation-curable resin (composition) by gravure coating, roll coating, or the like, and cross-linking the coating by irradiation with ionizing radiation to form a crosslinked product containing inorganic particles. Is done. In addition, it may be formed by full solid printing such as gravure printing. The coating amount is about 1 to 30 g / m ² (based on solid content).
[0019]
As the ionizing radiation-curable resin, a prepolymer (including a so-called oligomer) having a radical polymerizable unsaturated bond or a cationic polymerizable functional group in a molecule and / or a monomer are appropriately mixed and can be cross-linked and cured by ionizing radiation. A composition is used. As the ionizing radiation-curable resin, a polyene / thiol-based prepolymer formed by a combination of a polyene and a polythiol, which can be cross-linked and cured by ionizing radiation is also used.
Here, the term “ionizing radiation” means an electromagnetic wave or a charged particle having energy capable of polymerizing or cross-linking a molecule, and is generally an electron beam (EB) or an ultraviolet ray (UV).
[0020]
The above-mentioned prepolymer or monomer is specifically a compound having a radical polymerizable unsaturated group such as a (meth) acryloyl group or a (meth) acryloyloxy group, or a cationic polymerizable functional group such as an epoxy group in a molecule. Consists of These prepolymers and monomers are used alone or as a mixture of two or more. Here, for example, the (meth) acryloyl group means an acryloyl group or a methacryloyl group.
[0021]
Examples of the prepolymer having a radical polymerizable unsaturated group in a molecule include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, and triazine (meth) acrylate. Can be done. A molecular weight of about 250 to 100,000 is usually used. In addition, (meth) acrylate means acrylate or methacrylate.
[0022]
Examples of the monomer having a radical polymerizable unsaturated group in the molecule include monofunctional monomers such as methyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and phenoxyethyl (meth) acrylate. Further, among the polyfunctional monomers, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylpropane tri (meth) acrylate, trimethylolpropane ethylene oxide tri (meth) acrylate, dipentaerythritol tetra (meth) acrylate And dipentaerythritol penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate.
[0023]
Examples of prepolymers having a cationically polymerizable functional group in the molecule include prepolymers of epoxy resins such as bisphenol epoxy resins and novolak epoxy compounds, and vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers. .
[0024]
Examples of the thiol include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Examples of the polyene include those obtained by adding allyl alcohol to both ends of a polyurethane made of a diol and a diisocyanate.
[0025]
When the ionizing radiation-curable resin is cross-linked by ultraviolet rays, a photopolymerization initiator is added to the ionizing radiation-curable resin.
When the ionizing radiation curable resin is a resin having a radical polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ethers are used alone or in combination as a photopolymerization initiator.
When the ionizing radiation-curable resin is a resin having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, a benzoin sulfonic acid ester, etc. Are used alone or as a mixture.
The addition amount of these photopolymerization initiators is about 0.1 to 10 parts by mass with respect to 100 parts by mass of the ionizing radiation-curable resin.
[0026]
As the inorganic particles contained in the ionizing radiation-curable resin, inorganic particles harder than a cured product of the ionizing radiation-curable resin are used.
Examples of the material of such inorganic particles include alumina (α-alumina or the like), aluminosilicate, silica, glass, silicon carbide, boron nitride, diamond, and the like.
The shape of the inorganic particles is a sphere, a polygon (a cube, a regular octahedron, another polyhedron, or the like), a scale, an irregular shape, or the like. The average particle size of the inorganic particles is preferably about 3 to 30 μm. If the average particle size is too small, the effect of improving the wear resistance is reduced, and if it is too large, the surface smoothness is reduced. For example, specifically, α-alumina particles having an average particle diameter of about 25 μm, silica particles having an average particle diameter of about 5 μm, and the like are used. Further, the average particle size is preferably in the range of 0.3 to 2.0 times the thickness of the surface resin layer 56. If it is less than this range, it is difficult to obtain a sufficient effect of improving abrasion resistance, and if it exceeds this range, the surface becomes rough or the feel to the touch deteriorates.
The amount of the inorganic particles is about 5 to 30% by mass based on the total amount of the resin.
[0027]
Further, various additives may be further added to the ionizing radiation-curable resin as needed. As these additives, for example, extender pigments (fillers) made of fine powders such as vinyl chloride-vinyl acetate copolymers, vinyl acetate resins, acrylic resins, thermoplastic resins such as cellulose resins, calcium carbonate, barium sulfate, etc. ), Lubricants such as silicone resin and wax, and coloring agents such as dyes and pigments.
[0028]
Examples of the electron beam source of ionizing radiation include various electron beam accelerators such as Cockcroft-Walton type, Van degraft type, resonance transformer type, insulating core transformer type, or linear type, dynamitron type, and high frequency type. Irradiation with electrons having an energy of １０００1000 keV, preferably 200-300 keV is used.
As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light, and a metal halide lamp is used. As a wavelength of the ultraviolet light, a wavelength range of 190 to 380 nm is usually mainly used.
[0029]
Next, the function and effect of the decorative sheet 50 will be described.
The decorative sheet 50 has higher abrasion resistance than the above-described conventional decorative sheet 150 (the decorative sheet 150 in which the layer on the most front side is a transparent celluloid plate). That is, even if countless pachinko balls pass over the decorative sheet 50, they are not easily worn. For this reason, the game board 10 in which the decorative sheet 50 is used maintains an aesthetic appearance for a long time.
[0030]
The results of experiments on it are as follows.
An experiment was conducted on the wear resistance of the decorative sheet 50 and the conventional decorative sheet 150 based on Japanese Industrial Standards (JIS) K6902. According to this, the wear amount of the decorative sheet 50 was 1.6 × 10 ⁻⁵ g / time, and the wear amount of the conventional decorative sheet was 7.9 × 10 ⁻⁴ g / time.
This indicates that the decorative sheet 50 is superior to the conventional decorative sheet 150 in abrasion resistance.
[0031]
In addition, compared to the above-described conventional decorative sheet 150, static electricity is less likely to be generated. That is, even if countless pachinko balls pass over the decorative sheet 50, static electricity is less likely to be generated and dust and the like are prevented from adhering.
[0032]
Further, even if the decorative sheet 50 is incinerated, dioxin is less generated, and does not adversely affect the environment. Therefore, when the pachinko machine having the game board 10 in which the decorative sheet 50 is used is incinerated, it is not necessary to remove the decorative sheet 50 from the game board 10, and the disposal efficiency is improved.
[0033]
【The invention's effect】
As described above, the decorative sheet of the game board according to the present invention has the effects of high abrasion resistance, low generation of static electricity, and low generation of dioxin during incineration.
[Brief description of the drawings]
FIG. 1 is a front view showing a pachinko machine using a decorative sheet according to one embodiment of the present invention.
FIG. 2A is an enlarged exploded cross-sectional view of a game board according to an embodiment of the present invention. (B) is an enlarged exploded sectional view of the decorative sheet.
FIG. 3A is an enlarged exploded sectional view of a conventional game board. (B) is an enlarged exploded sectional view of the decorative sheet.
[Explanation of symbols]
10 gaming board 50 decorative sheet 51 first high quality paper (paper base material)
52 Second high quality paper (paper base material)
56 Surface resin layer

Claims (1)

A decorative sheet disposed on the front side of a game board of a ball game machine,
Paper base material,
A decorative sheet for a game board, comprising a crosslinked product of an ionizing radiation-curable resin containing inorganic particles and having a surface resin layer forming a layer on the most front side.

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