Title:
ゴルフボール
Document Type and Number:
Japanese Patent JP7476726
Kind Code:
B2
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.
Inventors:
Toshiyuki Takubo
Takahiro Sajima
Takahiro Sajima
Application Number:
JP2020142703A
Publication Date:
May 01, 2024
Filing Date:
August 26, 2020
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
A63B37/00; A63B45/02
Domestic Patent References:
| JP2013000168A | ||||
| JP11299931A | ||||
| JP2020036831A | ||||
| JP2005052302A |
Foreign References:
| US6315681 |
Attorney, Agent or Firm:
Ariko Patent Office