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US 2019/0160340 A1Published application
Golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorsToshiyuki TARAO, Mami TANAKA, Hidetaka INOUE
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AssigneeSumitomo Rubber Industries, Ltd.
InventorsToshiyuki TARAO, Mami TANAKA, Hidetaka INOUE
Estimating the term…
An object of the present invention is to provide a golf ball having enhanced controllability on approach shots from the rough and excellent stain resistance and shot feeling. The present invention provides a golf ball comprising a golf ball body having a cover, and a paint film covering the golf ball body, wherein a 10% elastic modulus of the paint film is 75 kgf/cm2 or less, a storage modulus (E′150) at 150° C. of the paint film obtained by measuring dynamic viscoelasticity of the paint film is 1.0×107 Pa or more, an indentation depth of the paint film measured under a specific measuring condition in a state that the paint film is formed on the surface of the golf ball body is 1250 nm or more, and a material hardness of the cover is less than 50 in Shore D hardness.
A golf ball comprising a golf ball body having a cover, and a paint film covering the golf ball body, wherein a 10% elastic modulus of the paint film is 75 kgf/cm2 or less, a storage modulus (E′150) at 150° C. of the paint film obtained by measuring dynamic viscoelasticity of the paint film is 1.0×107 Pa or more, an indentation depth of the paint film measured with a nanoindenter in a state that the paint film is formed on the surface of the golf ball body is 1250 nm or more, and a material hardness of the cover is less than 50 in Shore D hardness.
A golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein a 10% elastic modulus of the paint film is 75 kgf/cm2 or less, a storage modulus (E′150) at 150° C. of the paint film obtained by measuring dynamic viscoelasticities of the paint film is 1.0×107 Pa or more, an indentation depth of the paint film measured with a nanoindenter in a state that the paint film is formed on the surface of the golf ball body is 1250 nm or more, a diameter of the golf ball ranges from 40 mm to 45 mm, and a compression deformation amount of the golf ball when applying a load from 98 N as an initial load to 1275 N as a final load to the golf ball is 3.0 mm or less.
Dependencies are inferred from the claim text.