Abstract: A golf ball comprising a core, an intermediate layer and a cover, wherein the intermediate layer has a moisture vapor transmission rate that is lower than that of the cover and, additionally, a primary ingredient of the intermediate layer is made from a material including polybutadiene, natural rubber, butyl-based rubber, acrylics, trans-polyisoprene, neoprene, chlorinated polyethylene, balata, multi-layer thermoplastic films, blends of ionomers, polyvinyl alcohol copolymer and polyamides, and dispersions of acid salts of polyetheramines.

Abstract: The present invention is directed towards a golf ball which comprises a core, a cover and at least one improved intermediate layer disposed between core and the cover. The intermediate layer a composite of at least two dissimilar materials that is radially oriented and transversely isotropic so that the layer provides unique performance properties when the ball is struck with different clubs.

Abstract: A golf ball comprising a core comprised of a polymer containing an acid group fully-neutralized by an organic acid or a salt, a cation source, or a suitable base thereof, the core having a first Shore D hardness, a compression of no greater than about 90, and a diameter of between about 1.00 inches and about 1.64 inches; and a cover layer comprising ionomeric copolymers and terpolymers, ionomer precursors, thermoplastics, thermoplastic elastomers, polybutadiene rubber, balata, grafted metallocene-catalyzed polymers, non-grafted metallocene-catalyzed polymers, single-site polymers, high-crystalline acid polymers and their ionomers, or cationic ionomers.

Abstract: A golf ball comprising a core of one or more layers, a cover layer of one or more layers and a mantle layer disposed between the core and the cover. The mantle layer comprises a thermoplastic material, preferably having a hardness of greater than 60 Shore D and a Bashore resilience of greater than 34 and a vicat point of greater than 350° F.

Abstract: The present invention is directed to improved multi-layer golf ball compositions and the resulting regulation balls produced using these compositions. In this regard, a lighter core is produced and metal particles, or other heavy weight filler materials, are included in the cover compositions. This results in a molded golf ball exhibiting enhanced interior perimeter weighting. Preferably, the particles are included in an inner cover layer (or mantle) of a solid, three-piece multi-layered golf ball. The weight of the core is reduced in order to produce an overall golf ball which meets, or is less than, the 1.62 ounce maximum weight limitation specified by the United States Golf Association. It has been found that the combination of the present invention produces a golf ball with an increased moment of inertia and/or a greater radius of gyration and thus generates lower spin.

Abstract: The present invention is directed towards a multi-layered golf ball, at least the inner cover having multiple layers formed by a sandwich injection molding process, wherein each multi-layered cover comprises an inner layer and an outer layer of a first material and an intermediate layer therebetween of a second material. The materials having different properties. An embodiment of the invention includes both covers being multi-layered formed by the sandwich injection molding process.

Abstract: Provided is a multi-piece solid golf ball, wherein an outer layer cover is made from a material containing a polyurethane based elastomer as a main component; a surface Shore D hardness of a solid core is in a range of 50 to 60, a Shore D hardness of an inner layer cover is in a range of 53 to 61, and a Shore D hardness of the outer layer cover is in a range of 52 to 58; an average value of the surface Shore D hardnesses of the solid core and inner and outer layer covers is in a range of 53 to 58; a value obtained by dividing a thickness of the outer layer cover by a thickness of the inner layer cover is in a range of 0.48 to 1.00, and a total of the thickness of the outer layer cover and the thickness of the inner layer cover is in a range of 1.5 mm to 3.5 mm; and a dimple volume occupying ratio VR value is in a range of 0.66% to 0.85%.

Abstract: A multi-piece golf ball includes a core having a diameter of 30 to 40 mm, at least one intermediate layer including the outermost layer having a thickness of 0.5 to 2.0 mm, and a cover having a thickness of 1.0 to 3.0 mm. The core is made from a rubber composition mainly containing polybutadiene. The outermost layer is made from a non-ionomer based thermoplastic resin. The cover is made from a material obtained by dispersedly blending at least one kind of silicone powder selected from a silicone rubber powder, a silicon resin powder, and a composite powder thereof, in a main resin component containing an ionomer resin in an amount of 50% by weight or more. The core has a hardness corresponding to a deflection in a range of 3.5 to 6.5 mm under an applied load of 100 kg.

Abstract: The present invention provides a solid golf ball having exceptional rebound characteristics and flight performance, as well as good shot feel.

Abstract: A practice golf ball and its associated method of manufacture is claimed. The practice golf ball includes a hollow inner shell made of inexpensive molded plastic. The inner shell is molded so that the outer surface of the inner shell contains a dimple pattern. A first coating covers the inner shell. The first coating is applied as a liquid, wherein the first coating conforms to the dimple pattern on the inner shell. The first coating has a degree of elasticity greater than that of the plastic inner shell. A second coating covers the first coating. The second coating is also applied as a liquid, wherein the second coating conforms to the dimple pattern of the inner shell and the intervening first coating. The second coating has a degree of tear resistance greater than that of the plastic inner shell.

Abstract: The present invention relates to a multi-piece solid golf ball comprising a core consisting of an inner core and an outer core formed on the inner core, and one or more layers of cover covering the core, wherein the inner core has a diameter of 34.0 to 37.4 mm and a JIS-C center hardness of 65 to 75, the outer core has a thickness of 0.8 to 2.0 mm and a JIS-C surface hardness of 75 to 85, and the cover has a shore D hardness of 45 to 70, and contains ionomer resin as a base resin.

Abstract: The present invention provides a multi-piece solid golf ball having excellent flight distance, spin performance, shot feel and scuff resistance. The present invention relates to a multi-piece solid golf ball comprising a core consisting of a center and an intermediate layer, and a cover having many dimples, wherein the center and intermediate layer are formed from polybutadiene rubber, the center has a diameter of 25 to 40 mm, and a surface hardness of the center is higher than a central point hardness of the center by not less than 15, the intermediate layer has a thickness of 0.5 to 8.0 mm, and a surface hardness of the intermediate layer is higher than the central point hardness of the center by 20 to 50, and the hardness difference (C−D) between the cover hardness (D) and the surface hardness of the intermediate layer (C) is within the range of 0 to 12.

Abstract: Golf ball compositions for use in ball covers and intermediate layers incorporate a specified block copolymer and are essentially free of ionomeric material. The compositions are outside the scope of those previously considered suitable for use in ball covers and intermediate layers. When used in ball covers, the composition provides for improved ball performance with respect to spin rate, feel, and durability. When used in ball intermediate layers, the composition provides for improved ball performance with respect to spin rate and distance. Also, a method for making a golf ball includes preparing a composition essentially free of ionomeric material including the specified block copolymer, and then incorporating the composition into a golf ball.

Abstract: A golf ball comprising a core comprised of a polymer containing an acid group neutralized by an organic acid or a salt thereof, the organic acid or salt thereof being present in an amount sufficient to neutralize the polymer by at least about 80%, wherein the core has a first Shore D hardness, a compression of no greater than about 80, and a diameter of no less than about 1.53 inches; and a cover comprised of a material having a second Shore D hardness at least 10 points less than the first hardness.

Abstract: A golf ball includes a core, an intermediate layer, and a cover. At a boundary between the core and the intermediate layer or at a boundary between the intermediate layer and the cover, convex ribs are formed in a network pattern on a first layer such that the convex ribs intrude into a second layer. In addition, columnar projections are formed on the first layer at positions corresponding to the nodes of the network pattern such that the columnar projections intrude into the second layer deeper than the convex ribs.

Abstract: A golf ball comprising a core and a cover layer, wherein the core has an outer diameter of no greater than about 1.62 inches; the cover layer comprises an inner cover layer and an outer cover layer having a material hardness of less than about 60 Shore D; and at least one of the core or the cover comprises high-Mooney-viscosity rubber, high-Mooney-viscosity rubber regrind, or a mixture thereof.

Abstract: The present invention is a golf ball that has a coefficient of restitution at 143 feet per second that is greater than 0.8015, and an USGA initial velocity less than 255.0 feet per second. The golf ball is preferably a solid three-piece golf ball with a thermosetting polyurethane cover, an ionomer blend intermediate layer and a polybutadiene core.

Abstract: The present invention is directed to a golf ball comprising a soft core and a hard cover to produce a resulting molded golf ball having a reduced spin rate. The golf ball comprises one or more metal mantle layers and a cellular or liquid core component. The golf ball may also comprise an optional polymeric spherical substrate inwardly disposed relative to the one or more metal mantle layers. The golf ball of the present invention may also utilize an enlarged diameter which serves to further reduce spin rate. The resulting golf ball exhibits properties of reduced spin without sacrificing durability, playability and resilience.

Abstract: A multi-piece solid golf ball comprising a rubbery elastic core and a cover enclosing the core and consisting of a plurality of resinous layers is provided. Among the plurality of cover layers, the outermost layer has a thickness of less than 1 mm and a Shore D hardness of 50-65 and an inner layer has a thickness of 0.5-2.0 mm and a Shore D hardness of 40-55. The ball is easy to control due to high-spin receptivity when hit with a short iron, and travels a distance due to restricted spin when hit with a small loft club like driver.

Abstract: The present invention is directed to an improved multi-layer golf ball comprising a core, an inner cover layer and an outer cover layer. The core preferably includes at least one metallic filler material. The inner cover layer is comprised of a low acid ionomer blend which may or may not include a filler such as zinc stearate. The outer cover layer is comprised of a soft, very low modulus ionomer or ionomer blend, or a non-ionomeric thermoplastic elastomer such as polyurethane, polyester or polyetheramide. The golf ball may further comprise an optional mantle layer, which may also include one or more filler materials. The resulting multi-layered golf ball of the present invention provides for enhanced distance without sacrificing playability or durability when compared to known multi-layer golf balls.

Abstract: A method for producing a golf ball, including a spherical elastic inner layer having a large number of projections and a thermoplastic resin outer layer covering the inner layer, employs a mold comprising an upper mold and a lower mold with a spherical cavity formed in the inside and a parting surface provided at a position corresponding to an equator of the spherical cavity. A plurality of columnar support pins each have a tip width sufficient for supporting at least two projections on the inner layer, the pins elongating into the cavity reciprocally movably toward the parting surface. The inner layer is supported at the cavity center portion of the mold by the support pins, from above and below at the projection positions. An external layer resin is injected into the space between the inner layer and the cavity wall surface surface, forming the inner and outer layers.

Abstract: The present invention provides a multi-piece solid golf ball having very soft and good shot feel, and excellent rebound characteristics and flight performance, when hit by golfers who swing a golf club at low head speed.

Abstract: A golf ball is formed from a core, a lattice, and a cover which surrounds the lattice and the core. The lattice is provided with openings which expose portions of the core.

Abstract: A solid golf ball comprises a solid core and a cover of at least one layer, the solid core having a multilayer construction which includes a center core and an outer core layer enclosing the center core. The center core is composed primarily of a thermoplastic resin or elastomer, and has a diameter of 3-18 mm and a Shore D hardness of 15-50. The outer core layer has a Shore D hardness near the interface thereof with the center core which is 1-15 units higher than the Shore D hardness of the center core. The ball has a good feel, excellent durability and good distance.

Abstract: The present invention is a golf ball that has a coefficient of restitution at 143 feet per second that is greater than 0.8015, and an USGA initial velocity less than 255.0 feet per second. The golf ball is preferably a solid three-piece golf ball with a thermosetting polyurethane cover, an ionomer blend intermediate layer and a polybutadiene core.

Abstract: In a golf ball comprising a core, an intermediate layer, and a cover, the core or the cover is provided with a plurality of protrusions penetrating into the intermediate layer, and the material of the protrusions has at least 8 units higher Shore D hardness than the material of the intermediate layer. The protrusions satisfy the applicable range of Euler's buckling formula. The golf ball has improved performance.

Abstract: A golf ball utilizing a high density core component, which is preferably part of a multicomponent core assembly is disclosed. The high density core component is preferably in the form of a metal sphere. The golf balls exhibit a unique combination of a relatively high coefficient of restitution, a controlled moment of inertia, and a relatively high spin rate during short distance shots. It is preferred that the high density core component be utilized in conjunction with a multi-layer cover assembly.

Abstract: A solid golf ball comprising a solid core, an encapsulating coating having a thickness of about 0.001 to 0.01 inches and a cast polyurethane outer cover layer. The cast outer cover layer is comprised of a prepolymer and a curing agent, wherein the prepolymer is made from a polyol selected from the group of polyether, polyester and polylactone and a diisocyanate selected from the group of 4,4′-diphenylmethane diisocyanate (MDI) and 3,3′-dimethyl-4,4′-biphenylene diisocyanate (TODI) and toluene diisocyanate (TDI). The encapsulating coating is a thermosetting latex material that is applied to the solid core through a solution.

Abstract: In a solid golf ball comprising a solid core and a cover, the solid core has a multilayer construction which includes a center core and an outer core that encloses the center core. The center core is composed primarily of a resin and has a diameter of 3-20 mm and a specific gravity of 0.90-1.50. The center core has a surface Shore D hardness of 40-95 which is at least 10 units greater than the Shore D hardness of an innermost layer of the outer core. The ball has an excellent click and feel.

Abstract: A multi-piece golf ball includes a rubbery elastic core, a cover having a plurality of dimples on the surface thereof, and at least one intermediate layer between the core and the cover. The intermediate layer is composed of a resin material which is softer than the cover. The elastic core has a hardness which gradually increases radially outward from the center to the surface thereof. The center and surface of the elastic core have a hardness difference of at least 21 JIS-C hardness units. This construction and combination of features improve the rebound energy, travel distance, durability and feel of the ball.

Abstract: A multi-piece solid golf ball has rebound characteristics equal to conventional two-piece solid golf ball when hitting at high head speed, and better rebound characteristics when hitting at low head speed. This multi-piece solid golf ball has a core with an inner layer outer layer on the inner layer, and at least one layer of cover on the core, the inner layer core having an elastic modulus of 50 to 200 MPa, the outer layer core having at least one layer of low elastic modulus with elastic modulus lower than the inner layer core by 15 to 100 MPa; at least one layer of the lowest elastic modulus layer in the core has a total thickness of 0.2 to 5.0 mm and is placed from 6.5 to 20.5 mm away from the core center point with diameter 37 to 41 mm.

Abstract: A multi-piece golf ball includes a rubbery elastic core, a cover having a plurality of dimples on the surface thereof, and at least one intermediate layer between the core and the cover. The intermediate layer is composed of a resin material which is harder than the cover. The elastic core has a hardness which gradually increases radially outward from the center to the surface thereof. The center and surface of the elastic core have a hardness difference of at least 18 JIS-C hardness units. This construction and combination of features improve the distance of the ball when struck with a driver, provide the ball with excellent spin characteristics and thus good controllability on approach shots, and gives the ball a good feel on impact, enabling the ball to meet the high expectations of skilled golfers.

Abstract: In a multi-piece solid golf ball comprising a solid core, an enclosure layer, an intermediate layer, and a cover, the enclosure layer and the intermediate layer each have a Shore D hardness of 10-50, the enclosure layer's Shore D hardness≦the intermediate layer's Shore D hardness≦the cover's Shore D hardness, and the deflections under a load of 100 kg of the solid core, a first spherical body consisting of the solid core and the enclosure layer, a second spherical body consisting of the solid core, the enclosure layer and the intermediate layer, and the ball are controlled to fall in specific ranges. The cover is formed of a cover stock comprising an ionomer resin and an inorganic filler.

Abstract: The present invention is a golf ball that has a coefficient of restitution at 143 feet per second that is greater than 0.8015, and an USGA initial velocity less than 255.0 feet per second. The golf ball is preferably a solid three-piece golf ball with a thermosetting polyurethane cover, an ionomer blend intermediate layer and a polybutadiene core.

Abstract: A multi-piece solid golf ball having very soft and good shot feel at the time of hitting, and having excellent flight performance by accomplishing high rebound characteristics and high launch angle when hit by a driver and an iron club. The solid golf ball includes a core, an intermediate layer formed on the core, and a cover covering the core, wherein the intermediate layer (a) is formed from a rubber composition containing a base rubber, a co-crosslinking agent, an organic peroxide and a filler, (b) has a hardness in JIS-C hardness of 75 to 90, and the hardness of the intermediate layer is higher than a surface hardness in JIS-C hardness of the center by 1 to 12, (c) has a thickness of 0.2 to 1.3 mm, and (d) has a specific gravity of 1.20 to 1.60.

Abstract: The present invention provides a multi-piece solid golf ball having little unevenness in physical properties. The present invention relates to a multi-piece solid golf ball comprising a center, an intermediate layer formed on the center, and a cover covering the intermediate layer, wherein the intermediate layer is composed of one or more layers mainly containing a rubber component, the rubber component for the intermediate layer has a Mooney viscosity of 25 to 40 ML(1+4)100° C.

Abstract: A golf ball comprising: a spherical elastic core; an inner cover comprising a resin; and an outer cover comprising a relatively hard resin or rubber and having dimples in an outer surface thereof, wherein the inner cover defines a large number of small holes disposed and substantially evenly dispersed in a periphery thereof, wherein the outer cover has protrusions which extend from an inner surface thereof into the small holes in the inner cover to conform with the small holes, and wherein the interface formed between the inner cover and the outer cover includes a relatively rough interface circumferentially extending along an outer surface of the inner cover and a relatively smooth interface radially extending along wall faces of the small holes.

Abstract: The present invention is directed to a golf ball comprising a dual core component. The dual core comprises an interior center component formed from a thermoset material, a thermoplastic material, or combinations thereof. The dual core also comprises a core layer disposed about the center component, formed from a thermoset material, a thermoplastic material, or combinations thereof. The present invention golf ball may further comprise an outer core layer that surrounds the dual core. The resulting multi-layered golf ball of the present invention provides for enhanced distance without sacrificing playability or durability when compared to known golf balls.

Abstract: A golf ball is described that includes a spherical core, an inner cover or mantle layer, and an outer cover layer. A wide array of ionomeric materials are noted for use in the various cover layers. The mantle and the outer cover layers exhibit different Shore D hardness values and at least one of the layers includes a heavy weight filler material to enhance the interior perimeter weight of the ball. In several particular versions of the golf balls, the filler material is present in an amount of at least 10% by weight based upon the weight of the layer or layers within which the filler material is incorporated.

Abstract: Multi-component golf balls comprising one or more interior mantle layers are described in which at least one of the mantle layers includes a plurality of relatively small foam granules dispersed within a polymeric matrix. In another aspect, the multi-component golf balls may instead, or in addition to utilizing foam granules in one or more mantle layers, comprise a plurality of foamed granules dispersed within a core of the ball. The golf balls described herein provide the distance and durability characteristics typically associated with two piece balls while also providing desirable playing characteristics associated with three piece or wound balls.

Abstract: In a golf ball whose outer layer cover is harder than the inner layer cover, convex ribs are formed on the inner surface of the outer layer cover such that the convex ribs intrude into the inner layer cover. When the apexes of each spherical triangle of a hypothetical octahedron or icosahedron assumed on the inner surface of the outer layer cover are each represented by A, the center of the triangle is represented by B, the midpoint of each side of the triangle is represented by C, and a point on a line connecting the center B and each apex A is represented by D, a convex rib is arranged along each of a line between point A and point D, a line between point B and point D, and a line between point C and point D.

Abstract: A golf ball includes a core, two or more intermediate layers, and a cover. In the golf ball, convex ribs are formed on the outer surface of the innermost intermediate layer (surrounding layer) covering the core such that the ribs intrude into an intermediate layer adjacent to the surrounding layer. Further, the hardness of the surrounding layer is made greater than those of the core and the intermediate layer adjacent to the surrounding layer.

Abstract: A multiple layer golf ball having a high compression core and a soft boundary layer is disclosed herein. The multiple layer golf ball may also have a hard cover. The soft boundary layer allows the multiple layer golf ball to mimic the properties of a lower compression core while providing good distance. The multiple layer golf ball has a low driver spin and a high pitching wedge spin. The boundary layer is composed of a polyurethane formed from a PPDI-based prepolymer while the core is composed of a polybutadiene. The cover may be composed of an ionomer blend.

Abstract: A golf ball includes a core, an intermediate layer, and a cover. At a boundary between the core and the intermediate layer or at a boundary between the intermediate layer and the cover, convex ribs are arranged in a network pattern on a first layer such that the convex ribs intrude into a second layer adjacent to the first layer. The first layer having the convex ribs is made harder than the second layer which receives the convex ribs, and cutaway portions are formed between the convex ribs.

Abstract: A golf ball having a polyurethane cover composed of a blend of polyurethane prepolymers is disclosed herein. The blend may be a dual blend with a TDI-based polyurethane prepolymer blended with a second diisocyanate polyurethane prepolymer, typically a PPDI-based polyurethane prepolymer. The blend may also be a tri-blend with a TDI-based polyurethane prepolymer blended with two other diisocyanate polyurethane prepolymers, typically two different PPDI-based polyurethane prepolymers. The golf ball has a durability of at least 3.5 on a shear test rating of the cover. The golf ball of the present invention also demonstrates tremendous distance using a BIG BERTHA® HAWKEYE® driver.

Abstract: In a golf ball comprising a core, an intermediate layer, and a cover, the core is formed primarily of polybutadiene rubber, the intermediate layer is formed primarily of a resin having an Izod impact strength of at least 50 J/m and provided on its outer surface with a plurality of recesses, and the cover is provided on its inner surface with a plurality of protrusions. The resin of which the cover is made has a higher Shore D hardness and a lower melting point than the intermediate layer-forming resin. Due to the embedment of the protrusions in the recesses, the golf ball has improved performance.

Abstract: A unique golf ball and related methods of manufacturing are disclosed in which the golf ball comprises one or more mantle layers comprising one or more metals, ceramic, or composite materials. Composite materials include silicone carbide, glass, carbon, boron carbide, aramid materials, cotton, flax, jute, hemp, silk, and combinations thereof. The golf ball may also comprise an optional polymeric spherical substrate inwardly disposed relative to the one or more mantle layers. The golf balls according to the present invention exhibit improved spin, feel, and acoustic properties. Furthermore, the one or more interior mantle layers prevent, or at least significantly minimize, coefficient of restitution loss from the golf ball, while also significantly increasing the moment of inertia of the golf ball.

Abstract: An illuminatable golf ball includes an outer translucent shell and a sealed inner core portion surrounded by the outer shell. The ball includes a self-contained lighting device formed and contained at least in part within the inner core portion. The lighting device includes an energy source, a pair of lighting elements, and connectors extending between the energy source and the lighting elements defining an electrical circuit. The lighting device includes a switch for energizing and deenergizing the lighting device. The switch can include a plunger insertable into the ball through an opening in the outer shell and through a bore in the inner core portion. The plunger is configured to change the state of the electrical circuit when it is inserted into and removed from the bore to energize and deenergize the lighting elements. The switch can also be timer actuated and of the force actuatable type.

Abstract: In preparing a golf ball comprising an inner cover (8) and an outer cover (13) around a core (5), an injection mold is used for the injection molding of the inner cover. The mold has a molding surface defining a cavity (4) and a plurality of opposed support pins (6) adapted to be moved into and out of the cavity with respect to the molding surface. The inner cover is formed by supporting the core in the cavity by means of the support pins, leaving a space between the core and the molding surface, injecting a molding material into the space, and curing the injected molding material while support pins are being projected into the cavity and/or support pins have been withdrawn behind the molding surface, thereby forming around the core the inner cover (8) having recesses (12) and/or protrusions (14).

Abstract: A golf ball includes a spherical outer-layer core having a concentric spherical inner cavity and having a wall thickness of 5-10 mm. A spherical inner-layer core having a diameter smaller than that of the spherical cavity is disposed within the spherical cavity of the outer-layer core. A cover is formed on the outer surface of the outer-layer core. A liquid is charged into the space between the outer-layer core and the inner-layer core to thereby form a liquid layer having a thickness of 1-3 mm. The liquid has a specific gravity substantially equal to that of the material of the inner-layer core. In the golf ball, the inner-layer core and outer-layer core can rotate independently while the golf ball is traveling. Also, the golf ball has sufficient resilience and strength.