An object of the present invention is to provide a golf ball having excellent resilience performance. The present invention provides a golf ball having a spherical core and at least one cover layer, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) an ,-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, and (c) a crosslinking initiator, provided that the rubber composition further contains (d) a metal compound in the case of containing only (b) the ,-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent, wherein (c) the crosslinking initiator includes a peroxy ketal represented by the formula (1), and substituents represented by R.sup.1 and R.sup.2 have a bond dissociation energy of 435 KJ/mol or more. ##STR00001##

An object of the present invention is to provide a golf ball having an excellent initial velocity when being hit at a head speed of 50 m/sec and an improved initial velocity when being hit at a head speed of 40 m/sec. The present invention provides a golf ball comprising a spherical core and a cover covering the spherical core, wherein the golf ball has a rebound equivalence energy ratio (R.sub.40) ranging from 65.50% to 99.0% at a deformation amount of 7%, and a rebound equivalence energy ratio (R.sub.50) ranging from 20.0% to 70.0% at a deformation amount of 19%, in a compression test (measurement temperature: 70 C., compression speed: 30 mm/min) applying a load to the golf ball along a radial direction of the golf ball.

Methods for making multi-piece golf balls comprising at least one component made of ethylene-propylene diene copolymer (EPDM) rubber and the resulting balls are provided. The multi-piece golf ball includes a cover, preferably a dual-cover having inner and outer cover layers. The outer cover is preferably made of a liquid rubber composition based on liquid EPDM rubber. In one version, the ball sub-assembly is dipped in a bath containing liquid EPDM rubber to form the outer cover. In another version, a casting method is used and the liquid EPDM rubber is dispensed into mold cavities to form the outer cover. The inner core of the ball may be made of polybutadiene rubber and the outer core layer may be made of EPDM rubber. The resulting golf ball has high resiliency, a soft feel, and good weatherability.

Methods for making multi-piece golf balls comprising at least one component made of ethylene-propylene diene copolymer (EPDM) rubber and the resulting balls are provided. The multi-piece golf ball includes a cover, preferably a dual-cover having inner and outer cover layers. The outer cover is preferably made of a liquid rubber composition based on liquid EPDM rubber. In one version, the ball sub-assembly is dipped in a bath containing liquid EPDM rubber to form the outer cover. In another version, a casting method is used and the liquid EPDM rubber is dispensed into mold cavities to form the outer cover. The inner core of the ball may be made of polybutadiene rubber and the outer core layer may be made of EPDM rubber. The resulting golf ball has high resiliency, a soft feel, and good weatherability.

A mixed reality golf simulation and training system that can use, along with a user's existing standard golf equipment, a golf ball launch monitor to track the initial ball positional data, spin and acceleration, and simulate the complete ball path and location or use complete ball tracking data and displays the actual ball path and location. Mixed reality glasses allow the display of ball tracking data over the real world view and/or an immersive display of a simulated world view, depending on the user's head or view position. Golf simulation graphical views can include various options, including simulated or panoramic photographic views of a golf course, simulated graphics and data superimposed over a real world driving range view, or simple ball tracking data superimposed over a real world view at any location.

Golf balls comprising a multi-layer core and a cover are disclosed. The multi-layer core comprises a layer formed from a highly neutralized polymer composition and a layer formed from a thermoset rubber.

Golf balls comprising a multi-layer core and a cover are disclosed. The multi-layer core comprises a layer formed from a highly neutralized polymer composition and a layer formed from a thermoset rubber.

An object of the present invention is to provide a golf ball excellent in durability. The present invention provides a golf ball comprising a constituent member containing a crosslinked rubber component and a polyrotaxane component, wherein the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin, and at least a part of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain via OC.sub.3H.sub.6O group.

A system including a plush toy implement in the shape of a sports implement; an audio player device that is configured to broadcast a parent message that is operable for comforting an infant; a storage pocket implement disposed on a first sidewall portion of the plush toy implement, wherein the storage pocket is configured to contain the audio player device; a strap implement sewn to a second sidewall portion of the plush toy implement that is configured to be safely secured to a sidewall of a crib, a stroller, a car seat, a play pen or a carrying handle of a safety seat; and a water-resistant housing structure enclosing the audio player device, in which the housing structure comprises at least rounded corners and edges that are configured to be secured within and removed from the storage pocket.

A system including a plush toy implement in the shape of a sports implement; an audio player device that is configured to broadcast a parent message that is operable for comforting an infant; a storage pocket implement disposed on a first sidewall portion of the plush toy implement, wherein the storage pocket is configured to contain the audio player device; a strap implement sewn to a second sidewall portion of the plush toy implement that is configured to be safely secured to a sidewall of a crib, a stroller, a car seat, a play pen or a carrying handle of a safety seat; and a water-resistant housing structure enclosing the audio player device, in which the housing structure comprises at least rounded corners and edges that are configured to be secured within and removed from the storage pocket.