JPS6327728Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fluorescently colored golf ball that has clear colors, is free from unevenness in tone, and can maintain its beauty for a long period of time.

Recently, golf balls with colored surfaces, called colored balls, have been proposed. The covering portion of this color ball generally has the following structure.

Fluorescent color paint is painted on a white resin cover, and a urethane-based transparent lacquer is painted on top of that. Fluorescent color paint is painted on a colored resin cover (referring to a resin cover containing fluorescent pigments), and then urethane-based transparent lacquer applied directly onto the colored resin cover. However, in the above cases, uneven coating of the fluorescent color paint is easily noticeable, and when the paint peels off, the white base coat is removed. In the above case, the reflected light from the inside is weak, and even if fluorescent color paint is applied, the color tone will not be clear and the color will be dull. In addition, in the above case, due to the hiding power of the titanium dioxide blended into the cover to hide the background color of the core, the fluorescent pigment in the inner layer does not contribute as reflected light, and the surface layer is affected by ultraviolet rays, heat, etc. The disadvantage is that if fluorescent pigments are exposed to heat (currently available fluorescent pigments discolor or fade due to light, heat, etc. more quickly than ordinary colored pigments), they quickly turn white.

The present invention was developed in view of such circumstances, and consists of coating the core with a 0.1 to 0.5 mm thick white resin layer containing a white pigment such as titanium dioxide.
By forming a fluorescent colored transparent resin layer with a thickness of 1.0 to 2.5 mm, which is made by coloring a transparent resin with a fluorescent pigment or fluorescent dye, on the outside of the white resin layer, the colors are clear and there is no unevenness in tone. In addition, the present invention provides a fluorescently colored golf ball that is less likely to change color or fade due to light or heat and retains its beauty for a long period of time.

That is, in the present invention, the core is coated with a white resin layer containing a large amount of a white pigment such as titanium dioxide to hide the background color of the core, and then a transparent resin is coated with a fluorescent pigment or a fluorescent pigment on the outside of the white resin layer. Since it forms a fluorescent transparent resin layer colored with fluorescent dye, the light that passes through the fluorescent transparent resin layer is reflected by the white resin layer, resulting in very clear colors, and it is also coated with fluorescent color paint. There is no uneven color tone due to uneven paint. In addition, since the fluorescent colored transparent resin layer does not contain titanium dioxide, all of the fluorescent pigments and fluorescent dyes contained in the layer contribute as reflected light, so even if a portion of it discolors or fades, it will not be noticeable. There is very little change in appearance over time, and the beauty can be maintained for a long time. The white resin layer has a thickness of 0.1 to 0.5 mm, which is thicker than that of conventional painting, so it completely hides the base color of the core and allows light to pass through the fluorescently colored transparent resin layer. The ball is efficiently reflected, making the color very clear, and also prevents scratches on the ball's surface caused by hitting from reaching the core, exposing the core and significantly degrading the appearance. In addition, the fluorescent colored transparent resin layer has a thickness of 1.0 to 2.5 mm, which is much thicker than conventional painting, so it maintains a high level of transparency on the ball surface, and it also allows for easy spin with short irons. To prevent deterioration of appearance due to hitting by preventing the scratches from reaching the white resin layer or the core even if the surface of the ball is scraped and scratched by the grooves of the club face when the ball is hit. Note that the thicker the white resin layer and fluorescent colored transparent resin layer, the better from the viewpoint of maintaining the beauty of the ball surface, but if they are too thick, the good shot feel will be impaired, so the white resin layer should be 0.5
mm, and the upper limit for the fluorescent colored transparent resin layer is set at 2.2 mm.

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a sectional view showing an embodiment of the golf ball of the present invention, in which 1 is a core, and 2 is a core 1.
This is a white resin layer that covers the 3 is a fluorescent colored transparent resin layer formed on the outside of the white resin layer 2;
is a colorless transparent lacquer layer coated on the fluorescent colored transparent resin layer 3.

As the core 1, a normal golf ball solid core or thread-wound core is used.

The white resin layer 2 is formed by coating the core 1 with a white resin made of an ionomer resin mixed with titanium dioxide and molding the core 1 so that the outer surface becomes a spherical surface.

If this white resin layer 2 is too thin, the effect of concealing the core 1 will be small, and scratches caused by hitting will easily reach the core. On the other hand, if it is too thick, the overall cover thickness will be thick and a good shot feel may be lost. Therefore, its thickness is preferably 0.1 to 0.5 mm, and in this embodiment, it is formed to 0.3 mm.

The fluorescent colored transparent resin layer 3 is formed by coating the outside of the white resin layer 2 with a fluorescent colored transparent resin made by blending an ionomer resin with a fluorescent pigment or fluorescent dye, and molding the resin layer to have dimples 3a on the outer surface. It is.

If the thickness of the fluorescent colored transparent resin layer 3 (thickness of the part without dimples) is too thin, the coloring effect will be small and the hue will be pale, and fading of fluorescent pigments and fluorescent dyes due to light, heat, etc. will occur on the surface of the resin cover. It is undesirable to make it too thin because it starts from the upper layer and gradually penetrates into the inner layer, and if it is too thin, the transparency will decrease and the ball surface will be scratched by hitting, especially if you hit it with a short iron with a lot of spin. Scratches that occur when the ball surface is scraped by the grooves of the club face tend to reach the white resin layer, and on the other hand, if it is too thick, the good shot feel will be lost, so the thickness should be between 1.0 and 2.5.
It is preferable to form it in mm, and in this example, it is 2.0 mm.
is formed.

The colorless transparent lacquer layer 4 uses a urethane-based colorless transparent lacquer, and this colorless transparent lacquer is used to mark the product name, manufacturer name, etc. on the fluorescent colored transparent resin layer 3 as necessary (Fig. (not shown) and then painted.

As described above, in the golf ball of the present invention, the core 1 is coated with the white resin layer 2 to hide the ground color of the core 1 with the white resin layer 2, and then a fluorescently colored transparent layer is coated on the white resin layer 2. Since the resin layer 3 is formed, the light transmitted through the fluorescently colored transparent resin layer 3 is reflected by the white resin layer 2, so that the color is very vivid and there is no unevenness in tone. Moreover, since the fluorescent colored transparent resin layer 3 does not contain titanium dioxide, the blended fluorescent pigment or fluorescent dye is not hidden by titanium dioxide, and all of them contribute to the reflected light. Even if a part of it discolors or fades, it is hardly noticeable, so there is very little change in appearance over time, and the beauty is maintained for a long time.

In this invention, the core is a solid core,
Any of the thread-wound cores can be used, and
With regard to their formulations, the existing ones can be used as is without any new specifications, which has the effect of making it possible to utilize the research results that have been accumulated so far regarding the core. Further, since there is no need to make special specifications for the core for colored balls, the core material can be used in common with ordinary white balls, which is very convenient in terms of manufacturing control.

Regarding the resin components of the white resin layer 2 and the fluorescently colored transparent resin layer 3, the ionomer resin used in the examples has excellent cut resistance and is suitable as the main material of the cover that covers the core. It is most suitable because it has excellent transparency, which is essential for a resin component, but it is not limited to these, and for example, nylon, polyurethane, polyacetal, a blend of ionomer resin and nylon, etc. can be used.

The most suitable white pigment to be added to the resin for the preparation of the white resin is titanium dioxide, which was used in the examples because of its high hiding power, but it is not limited to this, and zinc oxide, barium sulfate, etc. can also be used. Can be used.

As explained above, the golf ball of the present invention has a core coated with a white resin layer and a fluorescently colored transparent resin layer formed on the outside of the white resin layer, so that the golf ball has a very vivid color. Moreover, there is no unevenness in color tone, and there is little change in appearance over time, which allows the product to maintain its beauty for a long period of time.In addition, the appearance is much less likely to deteriorate due to impact than when it is painted.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the golf ball of the present invention. 1... Core, 2... White resin layer, 3... Fluorescent colored transparent resin layer, 3a... Dimple, 4... Colorless transparent lacquer layer.

Claims (1)

[Scope of utility model registration request] Thickness of thread wound core or solid core is 0.1~0.5
coated with a white resin layer of 1.0 to 2.5 mm thick, and on the outside of the white resin layer, a transparent resin is colored with a fluorescent pigment or fluorescent dye to form a fluorescent colored transparent resin layer with a thickness of 1.0 to 2.5 mm and having dimples on the outer surface, A golf ball comprising a colorless transparent lacquer coated on the fluorescently colored transparent resin layer.