JP3130015B2 - Manufacturing method of golf ball having metallic luster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates
The present invention relates to a method for manufacturing a golf ball having a portion having a metallic luster.

[0002]

2. Description of the Related Art The surface of a golf ball has an uneven surface (dimple), and a part of such a surface is provided with a picture or a number for distinguishing the golf ball from other golf balls. Up to now, as a product with a particularly high-class feeling, there has been known a golf ball in which a pattern drawn using a gold ink or a silver ink is provided on the surface of the golf ball. In the case of a pattern expressed using ink,
The metallic luster was not sufficient, and it was not possible to form a pattern having beautiful glitter. Also, in order to solve such a drawback, when a pattern is transferred to the ball surface by stamping using a stamping-deposited foil, the uneven surface of the golf ball is deformed by the stamping, so that the ball rolls. However, there is a drawback that poses a practical problem. In addition, in the case of transfer to a golf ball by such an engraving, it was not possible to obtain a product in which fine lines and patterns were sharply represented by surface irregularities.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a method of manufacturing a golf ball in which a portion having a beautiful metallic luster is partially formed on the surface. I do.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method of manufacturing a golf ball having a metallic luster on a surface thereof.
Plastic film substrate 6 / release layer 7 / surface protective layer 4
/ Metal thin film layer 3 / thermoplastic resin layer 2, wherein the metal thin film layer 3 is partially present and an arbitrary pattern with metallic luster is shown. After manufacturing the transfer film A having a thickness of 200 to 600 °, the thermoplastic resin layer 2 side of the transfer film A is brought into contact with the surface of the golf ball 1 and heated and pressurized. By releasing the release layer 7, the thermoplastic resin layer 2 is formed on the surface of the golf ball 1.
The metal thin film layer 3 / the surface protective layer 4 is transferred to form an arbitrary picture having metallic luster by the metal thin film layer 3. Further, the production method of the present invention is characterized in that, in the above production method, a transparent coloring layer 5 is provided between the metal thin film layer 3 and the surface protection layer 4 in the transfer film A.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the present invention will be described with reference to FIG. 1 which shows a layer structure on the surface of a golf ball obtained by the manufacturing method of the present invention. As shown in FIG. 1, in the golf ball obtained by the manufacturing method of the present invention,
At least a portion of the surface 1 is formed with a metallic luster excellent in glitter, in a state where the uneven surface is not deformed,
In this metallic luster, a thermoplastic resin layer 2 is laminated in close contact with the surface 1 of the golf ball, and a metal thin film layer 3 and a surface protective layer 4 are further laminated on the surface (FIG. 1). On the left side in the metallic luster part of the above). Therefore, in this case, the metallic gloss color of the metal thin film layer 3 itself is observed as it is. On the other hand, on the right side of the metallic luster in FIG. 1, a transparent coloring layer 5 is provided between the metal thin film layer 3 and the surface protective layer 4, and when this part is observed, The light is reflected by the metal thin film layer 3 located below the transparent coloring layer 5, and the color of the transparent coloring layer 5 appears to shine.

Various thermoplastic resins having good adhesion to the surface 1 of the golf ball when heat and pressure are applied can be used as the thermoplastic resin constituting the thermoplastic resin layer 2 in the present invention. Blend product of acrylic resin and acrylic resin, blend product of polyester resin and vinyl chloride vinyl acetate resin and acrylic resin, blend product of ethylene vinyl acetate resin, vinyl chloride vinyl acetate resin and acrylic resin, etc. are preferred. .

As a material of the metal thin film layer 3 located on the surface side of the thermoplastic resin layer 2, aluminum is generally used because the metal thin film layer 3 can be formed relatively easily by vacuum deposition. However, the present invention is not limited to this.
In the present invention, the method for forming the metal thin film layer 3 is not limited, and various known methods such as vacuum deposition and sputtering can be used. The thickness of the metal thin film layer 3 made of aluminum is preferably 200 to 600 °, more preferably 300 to 550 °, and 350 to 45 °.
0 ° is particularly preferred.

Further, the surface protective layer 4 of the present invention is not particularly limited as long as it is formed of a transparent resin having excellent heat resistance, but is coated with a resin solution such as an acryl-urethane resin solution. It is generally formed. In the present invention, the balance between the hardness of the surface protective layer 4 and the hardness of the plastic resin layer 2 is important, and the plastic thin film layer 3 is sandwiched between the plastic protective layer 4 and the surface protective layer 4. In order not to cause cracks (cracks), it is preferable to have the same hardness as the surface protective layer 4 requiring heat resistance. In the present invention, the thickness of the surface protective layer 4 is preferably 0.8 to 1.5 μm, and the thickness of the plastic resin layer 2 is preferably 1 to 2 μm.

In the present invention, the transparent colored layer 5 provided between the surface protective layer 4 and the metal thin film layer 3 may be any material as long as it does not block the reflection of light from the metal thin film layer 3. Although not particularly limited, those formed by printing an acrylic-urethane resin are preferable, and the layer thickness is preferably 0.1 to 0.3 μm. Of course, in the golf ball manufacturing method of the present invention, a general printing ink layer may be provided in a pattern portion where the metal thin film layer 3 does not exist, and a portion having a metallic gloss and a portion having no metallic gloss may be provided. Is a product with a very rich design. In the present invention, a surface coat layer made of a transparent material may be provided as the outermost layer.

Next, the transfer film A used in the golf ball manufacturing method of the present invention will be described.
FIG. 2 is a view showing a layer structure of a transfer film A preferred in the present invention. The transfer film A is made of a plastic film substrate 6 / a release layer 7 / a surface protection layer 4 / a transparent coloring layer 5 / metal. It has a layer structure of thin film layer 3 / thermoplastic resin layer 2. FIG. 3 shows the transfer film A shown in FIG.
FIG. 5 is a view showing a layer structure at an intermediate stage in the production of a plastic film base material 6 / a release layer 7 /
It has a layer structure of surface protective layer 4 / water-soluble resin layer 8 / transparent colored layer 5 / metal thin film layer 3.

In manufacturing the transfer film A shown in FIG. 2, first, as shown in FIG. 3, a resin solution is coated on one surface of a plastic film substrate 6 serving as a substrate. To form a release layer 7. At this time, as the plastic film substrate 6, in terms of heat resistance and pressure resistance when transferred to the surface 1 of the golf ball,
A polyethylene terephthalate (PET) film is preferable, and its thickness is suitably 9 to 25 μm. If the thickness of the plastic film substrate is larger than 25 μm, the adhesion to the uneven surface of the golf ball during transfer is undesirably deteriorated. On the other hand, the release layer 7 in the present invention
Various resins having mold releasability which have been conventionally used in transfer foils can be used as the resin for forming the resin. Then, the surface of the release layer 7 is coated with an acrylic-urethane-based resin liquid or the like having excellent heat resistance to form the surface protective layer 4. The surface protection layer 4 is a layer for protecting the surface of the pattern portion transferred to the golf ball. When the surface protection layer 4 is transferred to the surface of the golf ball having irregularities, the metal thin film layer 3 is formed together with the adhesive layer 2. In addition, the metal thin film layer 3 functions to prevent the occurrence of cracks in the (transparent coloring layer 5 / metal thin film layer 3) and to prevent the metal thin film layer 3 from being discolored by burning. Beautiful brilliancy can be expressed.

A water-soluble resin layer 8 is further formed on the surface of the surface protective layer 4 by printing a water-soluble resin liquid on a portion where the metal thin film layer 3 is not formed, that is, a portion where a pattern to be transferred is not formed. I do. At this time, the water-soluble resin used may be any resin that can be removed by washing with water, and a polyvinyl alcohol resin or the like is generally used. Then, the transparent colored layer 5 is printed on the portion where the colored metallic glossy portion is to be formed, and thereafter, the metal thin film layer 3 is formed on one entire surface of the plastic film substrate 6 by performing vacuum deposition or the like ( (See FIG. 3). The reason why the preferable thickness of the metal thin film layer 3 is in the above-mentioned range is to make it possible to relatively easily remove the water-soluble resin layer 8 in a subsequent washing step.

Therefore, in the intermediate product for transfer film of FIG. 3 thus obtained, the water-soluble resin layer 8 is dissolved by washing with water, and the water-soluble resin layer 8 and the transparent colored layer corresponding to the water-soluble resin layer 8 are dissolved. 5 and the metal thin film layer 3 are removed together, and a pattern in a portion where the water-soluble resin layer 8 is not present appears. afterwards,
When the thermoplastic resin layer 2 is formed by coating a thermoplastic resin over the entire surface of the plastic film substrate 6 on the side where the metal thin film layer 3 exists, the transfer film A having the layer configuration shown in FIG. 2 is obtained. .

In the manufacturing method of the present invention, after the transfer film A having the above-described layer configuration is manufactured, the thermoplastic resin layer 2 side of the transfer film A is brought into contact with the surface of the golf ball 1 to heat and heat. Press to transfer. In the present invention,
It is preferable to transfer the partially deposited foil on which an arbitrary pattern is formed by rubber. However, in the present invention, the area that can be transferred to the surface of the golf ball 1 is within a range in which the rubber of the transfer machine can push the curved surface of the golf ball having irregularities from above with a constant pressure by vertical movement. or,
The transfer condition varies depending on the type of the thermoplastic resin layer 2 and may be the transfer condition for a transfer foil manufactured using a conventional pigment ink.
0-150 ° C is preferred. If the transfer temperature exceeds 150 ° C., the surface irregularities of the golf ball may be impaired, which is not preferable. In the present invention,
After applying heat and pressure from the plastic film substrate 6 side, the plastic film substrate 6 is peeled off without deforming the unevenness of the surface of the golf ball 1 (the thermoplastic resin layer 2 / metal thin film layer 3). / Transparent colored layer 5
/ The surface protective layer 4) can be transferred, and a golf ball having a portion with metallic luster with excellent glitter can be manufactured. In the method for manufacturing a golf ball of the present invention, after the transfer, the entire surface of the golf ball,
A surface coat layer made of a transparent material may be provided. Hereinafter, although an example of the present invention is shown, the present invention is not limited to this.

[0015]

EXAMPLE A 25 μm thick plastic film (PE
Forming a release layer on one side of T) by gravure coating using an acrylic resin, forming a surface protective layer on the release layer by gravure coating using an acrylic-urethane resin, On the surface protective layer, a water-soluble resin layer having a desired pattern is formed using a polyvinyl alcohol resin to which silicon oxide is added as a water-soluble resin, and then a layer having a thickness of 0.2 μm is formed on at least a portion where the water-soluble resin layer is not present. A transparent colored layer is formed, and thereafter, a metal thin film layer having a thickness of 450 ° is formed over the entire surface by vacuum deposition using aluminum (FIG. 3). To remove the water-soluble resin layer, the transparent coloring layer and the metal thin-film layer at the portion corresponding to the water-soluble resin layer, and thereafter, the vinyl chloride-vinyl acetate-based resin and Film with a metallic metallic glossy pattern in which the edges of the transparent colored layer and the metal thin film layer are formed by forming a thermoplastic resin layer by a gravure method using a resin blended with Was obtained (FIG. 2). Then, the thermoplastic resin layer side of the transfer film thus obtained is brought into contact with the surface of the golf ball and heated and pressed to transfer the metallic luster, and the pattern having metallic luster on the surface of the golf ball Was formed.

[0016]

The golf ball obtained by using the manufacturing method of the present invention is provided with a pattern having a color metallic luster (metallic luster) such as gold, silver or blue on the surface thereof. As a result, the product has a higher quality than conventional products. In addition, this golf ball has an advantage that the metal thin film layer in the metallic luster is illuminated by the reflection of sunlight, so that the ball can be easily searched. In addition, in the golf ball obtained by using the manufacturing method of the present invention, since the uneven surface (dimple) of the surface is not deformed, the ball can roll well. Further, by using the manufacturing method of the present invention, a fine pattern that cannot be achieved by engraving or a pattern that requires a sharp edge can be relatively easily applied to the surface of a golf ball.

[Brief description of the drawings]

FIG. 1 is a diagram showing a layer configuration on a surface of a golf ball obtained by using the manufacturing method of the present invention.

FIG. 2 is a diagram showing a layer configuration of a transfer film A used to form the metallic glossy portion shown in FIG.

FIG. 3 is a diagram showing a layer configuration at an intermediate stage when the transfer film shown in FIG. 2 is manufactured.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Golf ball 2 Thermoplastic resin layer 3 Metal thin film layer 4 Surface protective layer 5 Transparent coloring layer 6 Plastic film base material 7 Release layer 8 Water soluble resin layer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-56554 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A63B 45/00 A63B 37/00 A63B 37 / 14

Claims (2)

(57) [Claims] 1. A method for manufacturing a golf ball having a metallic luster part formed on a surface thereof, comprising: a plastic film substrate 6 / a release layer 7 / a surface protection layer 4 / a metal thin film layer 3 / It has a layer structure of the thermoplastic resin layer 2, the metal thin film layer 3 is partially present, and an arbitrary pattern with metallic luster is shown.
After producing the transfer film A having a thickness of 00 to 600 °,
The thermoplastic resin layer 2 side of the transfer film A is brought into contact with the surface of the golf ball 1 by heating and pressurizing, and the plastic film substrate 6 / release layer 7 is peeled off. A metallic gloss portion formed by transferring the thermoplastic resin layer 2 / metal thin film layer 3 / surface protective layer 4 to form an arbitrary pattern having metallic luster by the metal thin film layer 3. Golf ball manufacturing method. 2. The method of manufacturing a golf ball according to claim 1, wherein a transparent colored layer 5 is provided between the metal thin film layer 3 and the surface protective layer 4 in the transfer film A.