A golf ball is provided that includes at least two layers of material disposed between a spherical core and a cover layer, wherein the elastic modulus of each is within three orders of magnitude of each adjacent layer or core. The spherical core can be a hollow metal core. This results in a golf ball that is legal for play and capable of drive distances essentially equivalent to those of currently available high performance golf balls, but also provides a golf ball that has less hook and slice during play.

Multi-layered golf balls containing a dual-core structure are provided. The core structure includes an inner core (center) made from a foam or metal-containing composition, or it has a hollow shell construction, and the outer core layer is made of a thermoplastic composition. Preferably, the thermoplastic composition comprises: a) ethylene acid copolymer, b) plasticizer, and c) cation source. A fatty acid ester such as ethyl oleate is preferably used as the plasticizer. The core assembly preferably has a positive hardness gradient extending across the entire assembly. The core structure and resulting ball have relatively good resiliency at given compressions.

Multi-layer golf balls comprising a center, intermediate layer, and cover are disclosed. The center is formed from a highly-neutralized acid copolymer composition.

A game ball of composite construction, having a spherical hollow shell, with a pattern of perforation or holes arranged on and through the surface thereof, to substantially increase the aerodynamic drag upon the composite, and thereby effective reduce the distance the composite can travel upon being struck by a bat or club. In order to modulate and better emulate or mimic the feel and track of the composite in play, the composite is further modified by the inclusion of a plurality of randomly ordered discrete spherical elements, within said hollow shell, to effectively displacing about 50% of the interior volume of the hollow shell, and thereby contributing from about 20% up to about 75% to the mass of said composite In the composite embodiment of this invention game ball is a golf ball.

Multi-layered golf balls containing a dual-core structure are provided. The core structure includes an inner core (center) made from a foam or metal-containing composition, or it has a hollow shell construction, and the outer core layer is made of a thermoplastic composition. Preferably, the thermoplastic composition comprises: a) ethylene acid copolymer, b) plasticizer, and c) cation source. A fatty acid ester such as ethyl oleate is preferably used as the plasticizer. The core assembly preferably may have a positive hardness gradient extending across the entire assembly. The core structure and resulting ball have relatively good resiliency at given compressions.

A novelty golf ball is provide and includes a spherical body, a plurality of dimples formed on the exterior surface of the spherical body, a first vessel formed on the interior surface of the spherical body and having a first material, a second vessel also formed on the interior surface of the spherical body and having a second material and positioned adjacent the first vessel, and a coupling interface configured to join the first vessel and the second vessel along a central axis. The spherical body having a first hemispherical side and a second hemispherical side, each formed from a polymeric material and including an exterior surface and an interior surface. The coupling interface is configured to join the first hemispherical side and the second hemispherical side along a central axis, the coupling interface is configured to release the first and second materials from the spherical body.