Coated one-piece golf ball

Abstract

The present invention provides a coated one-piece golf ball having excellent adhesion of a paint layer to a golf ball body and good appearance. The present invention relates to a coated one-piece golf ball comprising a golf ball body formed by vulcanizing and press-molding rubber composition, and a clear paint layer formed on the golf ball body, wherein the rubber composition comprises not less than 0.5 and less than 2.0 parts by weight of titanium oxide, based on 100 parts by weight of base rubber, and the clear paint comprises 0.1 to 2.0 parts by weight of fluorescent brightener, based on 100 parts by weight of resin solid content.

Description

[0001] The present invention relates to a coated one-piece golf ball. More particularly, it relates to a coated one-piece golf ball having excellent adhesion of a paint layer to a golf ball body and good appearance.[0002] One-piece solid golf ball has been conventionally obtained by coating a white paint on the surface of a golf ball body, and then coating a clear paint on the white paint layer in order to impart brightly white appearance to the surface of the golf ball. However, since a color of the white paint and that of the golf ball body were different, there was problem that the white paint was removed when it was hit repeatedly, and the appearance of the golf ball was poor. Further, since one-piece golf ball has been mainly used at driving ranges for practicing golf, in which golf balls are hit repeatedly, there was problem that a piece of the paint layer having been removed at the time of hitting was adhered on a face of a golf club when the white paint is used for the golf ...

AI Technical Summary

Benefits of technology

[0007] A main object of the present invention is to provide a coated one-piece golf ball having both good adhesion of a paint layer to a golf ball body and good appearance.

[0008] According to the present invention, the object described above has been accomplished in a coated one-piece golf ball obtained by forming a clear paint layer on the surface of a golf ball body by reducing an amount of titanium oxide in rubber composition for the golf ball body to a specified range, and using a fluorescent brightener in a specified amount, thereby providing a coated golf ball having both good adhesion of a paint layer to a golf ball body and good appearance.

[0024] At the time of molding the golf ball body, many depressions called "dimples" are formed on the surface thereof. Furthermore, marking with a stamp may be optionally provided after molding. It is desired to properly grind the surface of the golf ball body before coating a clear paint in order to remove a release agent adhered to the surface during press molding. Therefore, the adhesion of the paint is improved.

Problems solved by technology

However, since a color of the white paint and that of the golf ball body were different, there was problem that the white paint was removed when it was hit repeatedly, and the appearance of the golf ball was poor.

Further, since one-piece golf ball has been mainly used at driving ranges for practicing golf, in which golf balls are hit repeatedly, there was problem that a piece of the paint layer having been removed at the time of hitting was adhered on a face of a golf club when the white paint is used for the golf ball.

In order to solve the problem, it was attempted to coat only a clear paint on the golf ball body without coating a white paint, but there was problem that whiteness of the appearance of the coated golf ball was degraded when compared with the golf ball coated with the white paint.

However, since the proposed one-piece golf ball contains a large amount of titanium oxide, there is problem its adhesion to the clear paint is degraded, although the mechanism has not been turned out.

In addition, titanium oxide is relatively expensive and leads to cost-up of raw materials.

The above techniques have not been yet applied to one-piece golf balls.

In the above techniques, titanium oxide is present in the cover, but for a one-piece golf ball formed from only vulcanized rubber, a relatively large amount of titanium oxide should be formulated thereto because good white appearance is not obtained by a material such as a vulcanizing agent in the vulcanized rubber.