A golf ball comprising at least one layer consisting of a non-isocyanate-containing polyurethane composition comprising the reaction product of: at least one amine or polyamine, having an average functionality of 2.0 or greater, and at least one cyclo-carbonate. The amine may be selected for example from the group consisting of: ethylenediamine, hexamethylenediamine, or tris(2-aimnoethyl)amine, or blends thereof; and the polyamine may be selected for example from the group consisting of polyoxypropylene diamines, polyoxypropylene triamines, and combinations thereof. The cyclo-carbonate may comprise for example bis(cyclo-carbonate). Other possible reaction products include: (i) the at least one amine or polyamine and at least one epoxy-cyclo-carbonate oligomer, wherein the non-isocyanate-containing polyurethane composition can be modified with at least one of acrylic or siloxane; or (ii) the at least one amine or polyamine and at least one cyclo-carbonated soybean oil; or (iii) at least one lignin-based polyamine and at least one cyclo-carbonated soybean oil.

Multi-piece golf balls having a solid core and cover are provided. The ball contains a small, heavy inner core and surrounding outer core layer. The inner core preferably contains metal powder such as copper, steel, brass, tungsten, titanium, nickel, iron, tin, and bronze particles dispersed in a thermoset or thermoplastic polymeric matrix. For example, a polybutadiene rubber matrix may be used. In one preferred embodiment, the inner core contains elemental iron powder. Preferably, the particles have a weight average size in the range of about 10 μm to about 450 μm. In one embodiment, the outer surface of the inner core has a structure with projecting members. For example, the outer surface may contain multiple projecting ribs with gaps located between the ribs. The ball includes a cover surrounding the core structure. The cover may be multi-layered.

A golf ball comprising a core comprising an inner core center and an outer core layer disposed over the inner core center. The inner core center has a deflection of greater than 0.210 inch under a load of 100 kilograms, and the entire the core has a deflection ranging from 0.130 inch to 0.105 inch under a load of 100 kilograms. A mantle layer is disposed over the core and a cover is disposed over the mantle.

A method of forming a golf ball construct includes positioning one or more core or mantle portions of a golf ball into respective cavities of a mold system so that the core or mantle portion is substantially centered relative to the respective cavity, delivering injection material into the respective cavities, the injection material being at a first temperature and comprising one or more crosslinking resins, heating the injection material within the respective cavities to a second temperature to crosslink the one or more crosslinking resins, and removing from respective mold cavities the one or more golf ball constructs that are formed by heating the injection material to the second temperature.

A golf ball according to an aspect of the present invention is a golf ball having a large number of dimples, a surface of the golf ball is covered with a plurality of virtual flat surfaces each having a triangular shape, one or more dimples are arranged so as to correspond to each of the virtual flat surfaces, and an edge of each dimple is formed in a linear shape. Each dimple may have a triangular pyramid shape or a triangular frustum shape.

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.

Multi-layer golf balls having a hard, high compression center, a relatively soft intermediate layer, and a stiff outer cover layer, are provided. The outer surface hardness of the intermediate layer is less than that of both the center and the outer cover layer.

The invention provides a golf ball having a core and a cover of one layer or a plurality of layers, wherein the core is formed of a material molded under heat from a rubber composition containing (A) a base rubber, (B) an organic peroxide, and (C) water and/or a metal monocarboxylate, and has a hysteresis loss of 50% or less when compressed at a load cell speed of 500 mm/min and under a constant load of 5,000 N.

Systems, apparatus, and methods for using mobile sporting goods. In one aspect, the system permits a sporting enthusiast to track the location of a mobile sporting good, such as a golf ball, relative to a target, such as a target on a driving range, and correlate that location to a simulated location on a simulated golf hole.

A golf ball 2 includes a spherical core 4, a mid layer 6, and a cover 8. The core 4 is obtained by crosslinking a rubber composition. The difference between: a hardness H(5.0) at a point which is located at a distance of 5 mm from the central point of the core 4; and a hardness Ho at the central point is 6.0 or greater. The difference between: a hardness H(12.5) at a point which is located at a distance of 12.5 mm from the central point; and the hardness H(5.0) is 4.0 or less. The difference between a hardness Hs at the surface of the core 4 and the hardness H(12.5) is 10.0 or greater. The difference between the hardness Hs and the hardness Ho is 22.0 or greater. There is no zone in which a hardness decreases from the central point to the surface. A Shore D hardness H3 of the cover is greater than a Shore D hardness H2 of the mid layer.