Abstract: The present invention is directed to new metal cation neutralized high acid ionomer resins and to golf ball cover compositions containing these new resins. When the new high acid ionomer resins are utilized to manufacture a golf ball, the golf ball produced thereby exhibits properties of improved distance without sacrificing characteristics such as playability and/or durability when compared to low acid ionomer and/or low acid/high acid ionomer blends.

Abstract: The present invention is directed to improved multi-layer golf ball compositions having a core, an inner cover and an outer cover and the resulting regulation balls produced using these compositions. In this regard, a smaller and lighter core is produced and metal particles, or other heavy weight filler materials, are included in the inner cover compositions. This results in a molded golf ball exhibiting enhanced interior perimeter weighting. the heavy weight filler particles, such as powdered metals, are included in a relatively thick inner cover layer (or mantle) formed from an ionomer resin of a solid, three-piece multi-layered golf ball. The size and weight of the core can thereby be 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.

Abstract: A golf ball includes a hollow core formed of a material having a specific gravity of 1.05-1.25 and having a concentric spherical inner cavity, a cover formed on the outer surface of the hollow core, and a resin layer applied onto the inner surface of the hollow core and having a thickness of 1-3 mm. The resin layer is preferably formed of a material having an Izod impact resistance of 50 J/m or greater. The hollow core preferably has a wall thickness of 7-11 mm. The Shore D hardness of the resin layer is preferably greater than that of the hollow core by at least 10. The golf ball does not suffer breakage of the hollow core due to an impact acting on the golf ball upon being hit, and has proper degrees of hardness and resilience in order to increase travel distance.

Abstract: A golf ball comprising:a molded core; anda cover having a Shore D hardness of at least 65, wherein the cover is comprised of at least one high acid ionomer resin comprising a copolymer of greater than 16% by weight of an alpha, beta-unsaturated carboxylic, acid, and an alpha-olefin of which about 10% to about 90% of the carboxyl groups of the copolymer are neutralizer with a metal cation;wherein the low spin golf ball has a Riehle compression of 47 or greater and a spin rate of not greater than 6,933 revolutions per minute (r.p.m.) when struck with a No. 9 iron at a head speed of 105 feet per second and a launch angle of 26 to 34 degrees.

Abstract: The present invention provides a multi-piece solid golf ball having excellent durability, excellent shot feel when hitting and good productivity. The present invention relates to a multi-piece solid golf ball which includes a solid core having a inner core and at least one outer core layer formed on the inner core, and a cover covering the solid core, wherein the inner core and outer core are formed from the material obtained by dispersing rubber in an ionomer resin and dynamically vulcanizing it with a vulcanizing agent, wherein the rubber particles dispersed in the ionomer resin have a particle size of not more than 10 .mu.m, the outer core layer has a Shore D hardness of more than that of the inner core by 5 to 30, and a weight ratio of the ionomer resin to the rubber particles is within the range of 95:5 to 30:70.

Abstract: Disclosed herein is a golf ball cover composition comprising a combination of ionomer, ethylene-propylene rubber, and copolymer formed from (a) an .alpha.-olefin having two to eight carbon atoms, (b) an unsaturated monomer of the acrylate ester class having from 1-21 carbon atoms, and (c) an acid which includes at least one member selected from the group consisting of .alpha., .beta.-ethylenically unsaturated mono- and dicarboxylic acids, the weight ratio of the ethylene-propylene rubber to copolymer of .alpha.-olefin, acrylate ester and acid being in the range of 25:75 to 75:25. The novel cover composition enables the production of a golf ball having a high coefficient of restitution and a very soft cover with excellent cut resistance.

Abstract: A three-piece wound golf ball having improved characteristics of moment of inertia, initial spin and total flight distance with minimal dispersion, the ball comprising:a solid center core portion which is substantially spherical, is composed mainly of polybutadiene having a core diameter of 1.35-1.50 inches (34.3-38.1 mm), a specific gravity of 1.23-1.24; and a Shore D durometer hardness of 55-75 and a compression of 59-75 on an Atti compression tester;an intermediate thread-wound portion wound with an elastomeric thread material upon the core portion to a diameter of 1.540-1.600 inches (39.1-40.6 mm), the thread having an elongation of 800-1000%, a tensile strength of 4000-5000 psi, and a rectangular cross-section configuration of 0.0625 (+/-0.002) inch .times.0.024(+/-0.

Abstract: A golf ball comprising:a core comprising a diene polymer having a Riehle compression of at least 0.075; anda cover having a Shore D hardness of at least 65, wherein the cover is comprised of at least one high acid ionomer resin comprising a copolymer of greater than 16% by weight of an alpha, beta-unsaturated carboxylic acid, and an alpha olefin of which about 10 to about 90% of the carboxyl groups of the copolymer are neutralized with a metal cation. The golf ball has a diameter of 1.700-1.800 inches. The thickness of the cover is in the range of 0.08 to 0.13 inches.

Abstract: Disclosed herein is a multi-layer golf ball having a soft outer cover. The golf ball has a thermoplastic inner cover layer which preferably has a Shore D hardness of at least 65, and an outer cover with a Shore D hardness of 55 or less, and more preferably 48 or less. In a particularly preferred form of the invention, the outer cover comprises at least 75% of a soft ionomeric neutralized copolymer formed from a polyolefin, an unsaturated carboxylic acid, and a monomer of the acrylate ester class. The golf ball of the invention has exceptionally soft feel and high spin rates on short shots of 80 yards or less and, particularly, 40 yards or less, while maintaining good distance and average spin on full shots.

Abstract: Disclosed herein is a multi-layer golf ball having a central core, an inner cover layer containing a non-ionomeric polyolefin material and a filler, and an outer cover layer comprising a resin composition. The combined thickness of the inner and outer cover layer preferably is at least about 0.10 inches. The golf ball has a coefficient of restitution of at least about 0.750. When the inner cover layer contains a non-ionomeric material and the outer cover layer contains, e.g., an ionomer, the golf ball of the invention can be configured to have playability properties comparable to those of golf balls which contain substantially higher quantities of ionomer. A method for forming the golf ball described above also is disclosed.

Abstract: A two-piece solid golf ball comprises a solid core and a cover enclosing the core and having a number of dimples in its surface. The solid core is formed of a rubber base and has a specific gravity of at least 1.00. The cover has a greater specific gravity than the core. The golf ball has an inertia moment (M) within the range given by the following expression: M.sub.DL .ltoreq.M.ltoreq.M.sub.UL wherein M.sub.UL =0.08D+84.8 and M.sub.DL =0.08D+77.8 wherein D is a Shore D hardness of the cover, the dimples occupy at least 60% of the ball surface, and V.sub.0 is in the range of 0.4 to 0.65. V.sub.0 is the ratio of the volume of the dimple space below a plane circumscribed by the dimple edge to the volume of a cylinder whose bottom is the plane and whose height is the maximum depth of the dimple measured from the bottom. The ball is improved in flight distance, controllability, roll and straight travel upon putting.

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 of the present invention has 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.The two piece golf balls of the invention consist of a molded solid core comprising a diene polymer having a Riehle compression of at least 0.075 and a cover comprising at least one ionomer resin and having a Shore D hardness of at least 65, and the spin rate of said golf ball being not greater than 7541 revolutions per minute (rpm) when struck with a No. 9 iron at a head speed of 105 feet per second and a launch angle of 26 to 34 degrees.

Abstract: A polymer blend and a golf ball employing a cover formed of that polymer blend are disclosed. The polymer blend is made from about 5 to about 95 phr of the polymer blend. About 5 to about 95 phr resin is included in the blend. The ball that employs the cover of the polymer blend has excellent click and feel, as well as excellent spin characteristics.

Abstract: The present invention provides a golf ball which is superior in shot feel and controllability, and is superior in flight performance, durability and cut resistance and also have sufficient safety. The golf ball comprises a solid center, a thread rubber layer formed on the solid center and a cover formed on the thread rubber layer,wherein the solid center is composed of an inner spherical rubber formed of a vulcanized molded rubber composition containing an oily substance, and a coating layer of an oil-resistant substance for coating around the inner spherical rubber so as to prevent the bleeding of the oily substance of the inner spherical rubber, andthe cover contains an ionomer resin as a main component and a cover composition constituting the cover has a stiffness modulus of from 70 to 280 MPs.

Abstract: The disclosed invention provides novel golf ball compositions which contain olefinic based ionomers and non-ionic olefinic copolymers produced by use of metallocene catalysts. These compositions exhibit improved mechanical properties such as tensile and flexural properties. Golf balls which employ these blends provide ball properties and performance similar to and in some cases better than the state of the art ionomer based golf balls.

Abstract: A racket frame, which has a frame main body 12 made of a fiber reinforced plastic, an ionomer film 13 covering the frame main body 12, and a coating film 15 formed over the ionomer film 13, is provided with a gas permeable porous material film 14 interposed between the ionomer film 13 and the coating film 15 so as to reduce voids inside the frame main body 12 and between the frame main body 12 and the ionomer film 13. Since voids are reduced inside the frame main body 12 and between the frame main body 12 and the ionomer film 13, and since the ionomer film 13 is reinforced with the gas permeable porous material film 14, the racket frame has an excellent mechanical strength. Adhesion between the frame main body 12 and the ionomer film 13 is excellent. Adhesion between the gas permeable porous material film 14 and the coating film 15 is good.

Abstract: In a solid golf ball comprising a solid core and a cover, the solid core has a distortion of 3.5-5.0 mm under a load of 100 kg, and the cover based on an ionomer resin has a Shore D hardness of 50.degree.-63.degree. and a 300% modulus of 15-35 MPa. The ball offers a soft feel while maintaining the characteristics of solid golf balls.

Abstract: This invention relates to methods of using cationic ionomers in golf ball cover compositions. Further, this invention relates to golf balls which have covers and cores and which incorporate urethane ionomers. The polyurethane golf ball cover has improved resiliency and initial velocity through the addition of an alkylating agent such as t-butyl chloride to introduce ionic interactions in the polyurethane and thereby produce cationic type ionomers.

Abstract: The present invention is directed towards a multi-layer golf ball which comprises a core with one or more layers; at least one cover layer; and one or more mantle layers disposed between the core and cover layer, wherein the mantle layer comprises dynamically vulcanized thermoplastic elastomer, functionalized styrene-butadiene elastomer, thermoplastic polyurethane, metallocene polymer or blends thereof and thermoset materials.

Abstract: A two-piece golf ball, comprising:a core having a surface hardness of 55 to 75 and a sectional hardness at the location other than the core surface layer of 65 to 88, said hardness value being determined by a JIS-C type hardness tester; anda cover covering said core and having a stiffness of 1,000 to 3,000 kg/cm.sup.2 ;wherein said golf ball exhibits a contact area S between itself and a clubface, when hit with a driver at a head speed of 40 m/second, of 4.3 to 5.0 cm.sup.2, S being determined by the equation:S=.pi.(1/2{(a+b)/2}).sup.2wherein a is a transverse diameter of the contact area and b is a longitudinal diameter of the contact area.

Abstract: In a golf ball comprising a cover enclosing a core, the cover is formed of a resin blend of (a) a potassium ionomer resin and (b) a magnesium ionomer resin. Both the ionomer resins are ethylene-.alpha., .beta.-unsaturated carboxylic acid copolymers containing 10 to 20% by weight of .alpha., .beta.-unsaturated carboxylic acid, 20 to 70 mol % of the carboxyl group being neutralized with potassium or magnesium ion. The ionomer resins have a melt index of 0.6 to 8 and a Shore D hardness of 55 to 70. Ionomer resins (a) and (b) are blended in a weight ratio of from 85:15 to 20:80. The cover has enhanced durability against hitting at no expense of repulsion upon hitting.

Abstract: The present invention is directed to golf ball cover compositions containing blends of high or low carboxylic acid based copolymers and ethylene copolymers such as ethylene alkyl acrylates. The carboxylic acid groups of the blends are neutralized with metal cations. Golf balls produced with the cover molded thereon exhibit desired properties of distance and high coefficient of restitution without substantially sacrificing and/or improving characteristics like playability and durability when compared to existing covers comprising ionomeric resin blends.

Abstract: A golf ball having a molded UV-light-exposure modified outer surface comprising a neutralized copolymer of ethylene and at least one of methacrylic acid and acrylic acid with an array of undamaged dimples and surrounding land areas disposed thereon, and a top coat firmly adhered to the UV-light-exposure modified outer surface, the top coat exhibiting resistance to cracking at both the dimples and land areas.

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 of the present invention has an enlarged diameter which serves to further reduce spin rate. The resulting golf ball exhibits properties of reduced spin (i.e., the spin rate of the ball not being greater than 7541 r.p.m., preferably not greater than 7,500 r.p.m., when struck with a No. 9 iron at a head speed of 105 ft/sec. and a launch angle of 26 to 34 degrees) without sacrificing durability, playability and resilience.

Abstract: The present invention is directed to golf ball cover compositions containing blends of high or low carboxylic acid based copolymers and ethylene copolymers such as ethylene alkyl acrylates. The carboxylic acid groups of the blends are neutralized with metal cations. Golf balls produced with the cover molded thereon exhibit desired properties of distance and high coefficient of restitution without substantially sacrificing and/or improving characteristics like playability and durability when compared to existing covers comprising ionomeric resin blends.

Abstract: The objective of the present invention is to bring hit feeling of two-piece balls closer to that of thread-wound golf balls. The two-piece golf ball of the present invention comprises a core formed from a rubber composition comprising a base rubber, a co-crosslinking agent and an organic peroxide, and a cover covering the core, wherein said core has the following hardness distribution when measured by a JIS-C hardness meter;(1) hardness at a center: 58-73(2) hardness at 5-10 mm from the center: 68-78(3) hardness at 15 mm from the center: 76-88(4) surface hardness: 78-88(in the hardness distribution, hardness (2) is substantially constant being within the above range, of which tolerance is within .+-.3 and the other values satisfy the relation of (1)<(2)<(3).ltoreq.(4) ), a compression deformation of the core is 2.8-3.5 mm when pressurized by an initial load of 10 kg up to a final load of 130 kg and said cover has a thickness of 1.5-1.9 mm.

Abstract: A thread-wound golf ball having a liquid center wound by rubber thread and further having a cover placed thereon, characterized by using as the major component of the cover an ionomer whose JIS-C hardness is 70-85, making the thickness of the cover 1.0-1.8 mm, making the outside diameter of the liquid center 27-30 mm, making the center bag hardness of the liquid center 44-62 (in terms of JIS-A hardness), and making the thickness of the center bag 1.8-2.3 mm.

Abstract: A golf ball of improved playing characteristics weighing no more than 1.62 ounces and having a mean outside diameter of at least 1.70 inches. A dimple pattern on the surface of the ball may include a plurality of dimples which have different diameters. The dimples cover at least 70% of the surface of the ball. A core and cover are used which provide a finished ball having a coefficient of restitution between 0.790 and 0.830.

Abstract: An improved golf ball comprising a hollow, spherical shell of a polymeric material; a unitary, noncellular core of a material which, at the time of introduction into the shell, is a liquid and a one-piece spherical cover over the center. The spherical shell, as opposed to the core, is primarily responsible for the high initial velocity obtained when the golf ball is struck by a golf club so as to allow the golf ball to be driven long distances both in the air and on the ground when it lands. In an alternate embodiment, the center and cover are of a one-piece, blow-molded construction.

Abstract: A golf ball with a visible outer layer containing a blend of about 0.01 -0.05 parts by weight of a thiophene-type optical brightener and about 0.008-0.025 parts by weight of a second optical brightener selected from the group consisting of 2,2'-(1,2-ethenediyldi-4,1-phenylene)bisbenzoxazole and derivatives thereof, the parts by weight of optical brightener being based upon 100 parts by weight of the polymeric material. The blend provides for a degree of whiteness comparable to that of 0.1 parts by weight of a thiophene-type optical brightener used alone, and provides for better solubility than results from the use of higher concentrations of 2,2'-(1,2-ethenediyldi-4,1-phenylene)bisbenzoxazole alone.

Abstract: The present invention provides a thread wound golf ball having excellent durability, heat resistance and impact resilience, which comprises a core, a thread rubber layer and an outer layer. A thread rubber constituting the thread rubber layer comprising a solid rubber containing a high-cis polyisoprene rubber as a main rubber material and a liquid polybutadiene rubber and/or liquid butadiene-isoprene copolymer rubber as a rubber component.

Abstract: A head of a golf club has a central leather panel the surface of which forms a striking surface for engaging a golf ball. A flexible plastic layer adhered to the striking surface yields with the leather when the golf ball is struck. This construction enables more accurate control of the ball.

Abstract: A golf ball includes a core and a cover which is formed from two separate inner and outer layers. The inner layer is molded over the core and is formed from ionomer resin. The outer layer is molded over the inner layer and is formed from a blend of natural or synthetic balata and a crosslinkable elastomer such as polybutadiene. The elastomer is thermally crosslinked with a metallic salt of an unsaturated fatty acid, such as zinc diacrylate, and a crosslinking initiator such as organic peroxide.

Abstract: The present invention relates to improved cover compositions for golf ball construction. In this regard, it has been found that if high levels (i.e. greater than 10 pph resin) of metal stearates (i.e. zinc stearate, barium stearate, calcium stearate, magnesium stearate, etc.) are added to various ionomer resin formulations utilized in golf ball cover construction, the covers produced thereby exhibit similar or improved coefficient of restitution (C.O.R.) values combined with similar or reduced hardness (i.e. an increase in softness) properties. Moreover, since the metal stearates are significantly cheaper than the ionomer resins and the discovery that the metal stearates can be added at relatively high levels without detracting, and many instances enhancing the physical properties of the overall formulations, the addition of high levels of the metal stearates presents significant cost savings in the production of golf balls.

Abstract: The present invention relates to improved cover compositions for golf ball construction. In this regard, it has been found that if high levels (i.e. greater than 10 pph resin) of fatty acid salts (i.e. metal stearates, metal oleates, metal palmitates, metal pelargonates, metal laurates, etc.) are added to various ionomer resin formulations utilized in golf ball cover construction, the covers produced thereby exhibit similar or improved coefficient of restitution (C.O.R.) values combined with similar or reduced hardness (i.e. an increase in softness) properties. Moreover, since the fatty acid salts are significantly cheaper than the ionomer resins and the discovery that fatty acid salts can be added at relatively high levels without detracting, and many instances enhancing the physical properties of the overall formulations, the addition of high levels of the fatty acid salts presents significant cost savings in the production of golf balls.

Abstract: Ionomers derived from ethylene/methacrylic acid or ethylene/acrylic acid copolymers, containing high levels of acid neutralized with lithium, zinc and sodium are blended in defined amounts to form compositions with very high resilience. The compositions are highly suitable for use as golf ball covers.

Abstract: A golf ball comprising a core, a cover, and a clear paint outer layer. The cover comprises 100 parts by weight of an ionomer resin, a light stabilizer and an ultraviolet (UV) absorber such that the total amount of the light stabilizer and the UV absorber is present in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the cover resin and an amount ratio of the light stabilizer / the UV absorber is from 75/25 to 25/75. The clear paint comprises a light stabilizer and a UV absorber in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of the paint solid and an amount ratio of the light stabilizer / the UV absorber of 75/25 to 5/95. The clear paint further comprises a fluorescent whitening agent in an amount of 0.04 to 1.6 parts by weight based on 100 parts weight of the paint solid.

Abstract: An improved golf ball having a coefficient of restitution of at least 0.700 and comprising a hollow, spherical shell of a deformable polymeric material which is filled with either a liquid or a unitary, non-cellular core of a material which, at the time of introduction into the shell, is a liquid. The spherical shell may be solid or cellular. The core material may be added through a hole in the shell as a liquid, a gel or a melt. In the preferred embodiment, the spherical shell is formed from two half shells which are bonded to each other. The mating edges of the half shells may have surface configurations which maximize their contact area.

Abstract: A game ball is made by rotationally molding a hollow spherical shell from a blend of foamed ionomer resins (Surlyn 9450 and Surlyn 8528) and low density polyethylene resin. The center of the hollow spherical core may be filled with foamed polyurethane, and the spherical core may be covered by a leather cover. If desired, hollow ceramic microspheres or beads can be added to the resins before molding.

Abstract: The present invention relates to improved cover compositions for golf ball construction. The cover compositions comprise a blend of maleic anhydride modified thermoplastic rubber elastomers, and ionomer resins.In addition, the present invention is directed to golf balls produced utilizing the improved cover compositions. The golf balls exhibit properties of enhanced playability without sacrificing distance and/or durability.

Abstract: An improvement in the appearance of golf balls is disclosed. The "clear coat," i.e. the transparent coat which is the last put on the outer surface of the golf ball, has included in it an optical brightener, preferably one selected from the group consisting of stilbene derivatives, styryl derivatives of benzene and biphenyl, bis(benzazol-2-yl) derivatives, coumarins, carbostylrils, naphthalimides, derivatives of dibenzothiophene-5,5-dioxide, pyrene derivatives, and pyridotriazoles. Substantial improvements in appearance of the golf ball are obtained.

Abstract: A luminescent or phosphorescent golf ball, which emits a luminescent glow, is provided, for ease of finding the ball in the dark. A method of manufacture is also provided. Three embodiments are disclosed. In one embodiment, the golf ball includes a flexible core which has a primer coat disposed over the core outer surface and, a luminescent or phosphorescent coating is applied thereto followed by encapsulating the flexible core with its luminescent outer coating with a transparent, hard plastic cover. A second embodiment uses any conventional golf ball and applies the primer coat and luminescent coat thereto. The third embodiment provides a luminescent outer plastic cover that encapsulates a flexible core.

Abstract: A golf club comprising a club head having a mechanical impedance with a primary minimum value in a region of frequency in which the mechanical impedance of a ball to be struck takes a primary minimum value. Mechanical impedance is defined as the ratio of an external force applied to one point of the ball (or the club head) over the response speed of another point of the ball (or the head) when the force is applied.

Abstract: Disclosed is a method of coating a golf ball comprising coating a surface of a golf ball with a solution of ethylene-imine, carbodiimid or the derivatives thereof and then coating it with a paint and a pre-treatment solution comprising ethylene-imine, carbodiimide and the derivatives thereof for coating a golf ball.

Abstract: Solid golf balls comprising a solid core and a cover which exhibit improved flying performance, controllability, repulsion, fatigue resistance, and hitting feel. The solid core is formed from a composition comprising a polybutadiene containing at least 40% of cis-1,4-bond and an unsaturated carboxylic acid and/or a metal salt thereof for causing crosslinking of the polybutadiene and having a deformation of 1.5 to 3.5 mm under a constant load of 100 kg, and the difference in hardness between the center and the periphery of said solid core is less than 10%; and the cover is formed from a thermoplastic resin composition comprising 97 to 65% by weight of an ionomer resin and 3 to 35% by weight of a flexible resin selected from the group consisting of polyester elastomers, polyamide propylene-butadiene copolymers, 1,2 polybutadienes, polybutiene-1, and sytrene-butadiene block copolymers and mixtures thereof, and having a resilience of at least 35%, and having a flexural modulus of 1,500 to 4,500 kg/cm.sup.

Abstract: A one-piece short distance golf ball has a dense outer skin and a cellular core structure. The golf ball is the same size as a conventional ball (approximately 1.68 inches in diameter), is approximately half the weight of a conventional ball (15-35 grams), and plays approximately half as far as a conventional ball. The short distance golf ball is a lively ball with a rebound between 50% and 80%. The golf ball comprises a foam-molded thermoplastic polymer (approximately 100 parts) and a filler (approximately 0.5 to 15 parts). The thermoplastic polymer is Surlyn, and the filler material is preferably glass bubbles having a density between 0.12 and 0.18 grams per cubic centimeter. In addition the golf ball may have a brambled surface which helps the ball resist the effects of cross winds.

Abstract: A golf club head of a wood-type or an iron-type golf club having a face plate forming a part of the entire impact front face of the club head, and the face plate is formed of an ionomer resin having a compression Young's modulus in the range of 20 to 50 Kg/mm.sup.2.

Abstract: An improved colored golf ball is disclosed. The golf ball is made with a fluorescent coloring. In order to improve durability and give very pleasing aesthetics, the fluorescent coloring is blended into the cover stock. The name and/or number preferably are stamped directly onto the core for surprisingly superior durability. The cover stock can suitably be a clear ionomer resin and for highest gloss a clear final coating can be applied. If the name or trademark is stamped directly onto the core, it is visible through the clear cover. A UV stabilizer may be included. If a dye is used, it is preferred that it be 0.01-0.4% by weight of the cover and if a pigment is used the preferred range is 0.5-6% by weight of the cover.

Abstract: An iron type golf club head having the whole or the central part of a ball striking face thereof, which directly touches a golf ball, fabricated from a material possessing a compression Young's modulus (modules of longitudinal elasticity) lower than that of steel.

Abstract: A golf ball with a plurality of recessed dimples having a shape in accordance with a certain mathematical ratio on the surface thereof is disclosed. The value of the spatial volume of each dimple below a plane defined by an edge of the dimple divided by the volume of a cylinder, wherein the bottom of the cylinder is defined by the plane and the height is determined by the maximum depth of the dimple from the plane, is within the range of 0.35 to 0.43. The dimples having such a shape represent at least 90 percent of the total number of dimples on the golf ball. The maximum diameter of the dimple can be within the range of 2 to 4 mm and the maximum depth of the dimple can be within the range of 0.1 to 0.4 mm. This configuration results in a golf ball having an increased carry.