Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsToshiyuki Takubo, Takahiro Sajima
Life of this patent
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Abstract
A golf ball includes a core and a cover positioned outside the core. An n-layer (n is a natural number) partial mid layer is provided between the core and the cover. An area of the core in a region where the cover is laminated thereon is not less than 5.0% and not greater than 95.0% of a surface area of a phantom sphere having a radius equal to an average value of a distance from a central point of the core to a surface of the core. In an outer surface of the golf ball, a color difference ΔE1 based on a CIELAB color system between a region C where the cover is directly laminated on the core and a region M where the cover is laminated on the partial mid layer is not less than 20.0.
Claims10
A golf ball comprising a core and a cover positioned outside the core, wherein
- an n-layer (n is a natural number) partial mid layer is provided between the core and the cover and has a hardness equal to a hardness of the cover,
- an area of the core in a region where the cover is laminated thereon is not less than 5.0% and not greater than 95.0% of a surface area of a phantom sphere having a radius equal to an average value of a distance from a central point of the core to a surface of the core, and
- in an outer surface of the golf ball, a color difference ΔE1 based on a CIELAB color system between a region C where the cover is directly laminated on the core and a region M where the cover is laminated on the partial mid layer is not less than 20.0.
Dependencies are inferred from the claim text.