A golf ball comprising layers that have from 0.05% to 70% by weight of a radio-opaque filler, and wherein the concentration of the radio-opaque filler is measurably different in each layer is disclosed herein. The radio-opaque filler is preferably a compound based on barium, bismuth, tungsten, iodine, or reduced iron.

A golf ball comprising layers that have from 0.05% to 70% by weight of a radio-opaque filler, and wherein the concentration of the radio-opaque filler is measurably different in each layer is disclosed herein. The radio-opaque filler is preferably a compound based on barium, bismuth, tungsten, iodine, or reduced iron.

The present invention provides methods for producing golf balls having polyurethane covers and the resultant balls. Multi-piece golf balls having an inner core and outer cover with one or more intermediate layers disposed between the core and cover can be formed. The methods involve producing hydroxyl-terminated adducts and isocyanate-terminated prepolymers. Thermoset and thermoplastic polyurethane compositions can be prepared. The resulting polyurethane compositions and golf ball covers have high thermal stability and good wear-resistance and durability.

A golf ball includes a core, a mid layer, and a cover. An amount of compressive deformation C3 of the golf ball can be not less than 2.80 mm. The golf ball can satisfy the following mathematical formulas (1) and (2):

C1>(124.8−Hs)/11.5   (1)

C2−C1≥(−1/6*C1+(68−H2)/20+(5−Hd)/ 100)*T2   (2), where

C1 is an amount of compressive deformation (mm) of the core,

C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer,

Hd is Hs−Ho,

Ho is a hardness (Shore C) of a center the core,

Hs is a hardness (Shore C) of a surface of the core,

H2 is a hardness (Shore D) of the mid layer, and

T2 is a thickness (mm) of the mid layer.

A golf ball can include a core, a mid layer, and a cover. The golf ball can satisfy the following mathematical formulas (1), (2), and (3):

C1≤(124.8−Hs)/11.5  (1)

C2−C1≥(−⅙*C1+(68−H2)/20+(5−Hd)/100)*T2  (2)

10≤H2*T2−H3*T3  (3), where

C1 is an amount of compressive deformation (mm) of the core,

C2 is an amount of compressive deformation (mm) of a sphere including the core and the mid layer,

Hd is Hs−Ho,

Ho is a hardness (Shore C) of a center the core,

Hs is a hardness (Shore C) of a surface of the core,

H2 is a hardness (Shore D) of the mid layer,

H3 is a hardness (Shore D) of the cover,

T2 is a thickness (mm) of the mid layer, and

T3 is a thickness (mm) of the cover.

A golf ball 2 includes a main body 4 and a paint layer 6 positioned outside the main body 4. The main body 4 includes a spherical core 8, a mid layer 10 positioned outside the core 8, and a cover 12 positioned outside the mid layer 10. An indentation depth, measured when the paint layer 6 in a cross-section along a plane passing through a central point of the golf ball 2 is pressed by a force of 30 mgf in a direction perpendicular to the cross-section, is not less than 300 nm and not greater than 3000 nm. The paint layer 6 preferably has a thickness of not less than 5 μm and not greater than 50 μm.

In a golf ball having a core, envelope layer, intermediate layer and cover, the (core diameter)/(ball diameter) value falls within a particular range, the core has a specific hardness profile, and the Shore C hardness relationships among the core center and surface hardnesses and the surface hardnesses of the envelope layer-encased sphere, intermediate layer-encased sphere and ball satisfy the following conditions:

core surface hardness<surface hardness of envelope layer-encased sphere<surface hardness of intermediate layer-encased sphere>ball surface hardness,  (1)

(surface hardness of envelope layer-encased sphere)−(core center hardness)≥28.  (2)

Also, the envelope layer, intermediate layer and cover have respective thicknesses which satisfy the condition:

cover thickness<intermediate layer thickness  (3)

cover thickness<envelope layer thickness  (4)

envelope layer thickness≥0.8 mm.  (5)

This ball enables mid-level and skilled amateur golfers to achieve superior distances on driver shots and on iron shots, and moreover has a soft yet good feel at impact.

A golf ball comprising layers that have from 0.05% to 70% by weight of a radio-opaque filler, and wherein the concentration of the radio-opaque filler is measurably different in each layer is disclosed herein. The radio-opaque filler is preferably a compound based on barium, bismuth, tungsten, iodine, or reduced iron.

A golf ball comprising an electrical component is disclosed herein. The electrical component comprises an integrated circuit having a gyroscope, a magnetometer, and a BLUETOOTH low energy (BTLE) radio, and at least one battery. A body is composed of an epoxy material, and the body encompasses the electrical component.

A golf ball comprising an integrated circuit is disclosed herein. The integrated circuit comprises a gyroscope, a magnetometer, and a BLUETOOTH low energy (BTLE) radio, and at least one battery. A body is composed of an epoxy material, and the body encompasses the integrated circuit. A wound core layer is disposed over the body.