EP2361657B1 - Balle de golf solide multicouche - Google Patents

Balle de golf solide multicouche Download PDF

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Publication number
EP2361657B1
EP2361657B1 EP11154682.6A EP11154682A EP2361657B1 EP 2361657 B1 EP2361657 B1 EP 2361657B1 EP 11154682 A EP11154682 A EP 11154682A EP 2361657 B1 EP2361657 B1 EP 2361657B1
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EP
European Patent Office
Prior art keywords
golf ball
ball
core
millimeters
dimples
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP11154682.6A
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German (de)
English (en)
Other versions
EP2361657A1 (fr
Inventor
Hideyuki Ishii
Yutaka Kabeshita
Yasushi Ichikawa
Hsin Cheng
Chien-Hsin Chou
Chen-Tai Liu
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Nike Innovate CV USA
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Nike International Ltd
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Publication of EP2361657A1 publication Critical patent/EP2361657A1/fr
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Publication of EP2361657B1 publication Critical patent/EP2361657B1/fr
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0038—Intermediate layers, e.g. inner cover, outer core, mantle
    • A63B37/004—Physical properties
    • A63B37/0046—Deflection or compression
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/02—Special cores
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0004—Surface depressions or protrusions
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0004—Surface depressions or protrusions
    • A63B37/0017—Specified total dimple volume
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0004—Surface depressions or protrusions
    • A63B37/0018—Specified number of dimples
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0023—Covers
    • A63B37/0029—Physical properties
    • A63B37/0031—Hardness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0038—Intermediate layers, e.g. inner cover, outer core, mantle
    • A63B37/0039—Intermediate layers, e.g. inner cover, outer core, mantle characterised by the material
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0038—Intermediate layers, e.g. inner cover, outer core, mantle
    • A63B37/004—Physical properties
    • A63B37/0043—Hardness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/0038—Intermediate layers, e.g. inner cover, outer core, mantle
    • A63B37/004—Physical properties
    • A63B37/0045—Thickness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/005—Cores
    • A63B37/0051—Materials other than polybutadienes; Constructional details
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/005—Cores
    • A63B37/006—Physical properties
    • A63B37/0061—Coefficient of restitution
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/005—Cores
    • A63B37/006—Physical properties
    • A63B37/0064—Diameter
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/005—Cores
    • A63B37/006—Physical properties
    • A63B37/0065—Deflection or compression
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
    • A63B37/0075—Three piece balls, i.e. cover, intermediate layer and core
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
    • A63B37/0076—Multi-piece balls, i.e. having two or more intermediate layers
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/0003—Golf balls
    • A63B37/007—Characteristics of the ball as a whole
    • A63B37/0077—Physical properties
    • A63B37/0092—Hardness distribution amongst different ball layers
    • A63B37/00922—Hardness distribution amongst different ball layers whereby hardness of the cover is lower than hardness of the intermediate layers
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/02—Special cores
    • A63B37/06—Elastic cores

Definitions

  • the present invention relates generally to a golf ball and, more particularly, to a multilayer solid golf ball having a core that retains its performance characteristics after exposure to high temperature.
  • Multilayer golf balls with layers comprising a thermoplastic material such as ionomer materials brought golf ball technology to the next level.
  • a thermoplastic material such as ionomer materials
  • thin layers of different materials fused together added extra features such as lower spin off the tee but increasing spin around the green.
  • one of the layers may be a hard ionomer in a mantle layer while a soft elastomer material forms the layer for outer cover.
  • Thin ionomer layers were typically used because ionomer has relatively low resilience, particularly when compared to the rubbers typically used to form the core or the layers of the core.
  • highly neutralized ionomers such as those developed by DuPont®, have resilience comparable to or even better than the resilience of rubber materials. These highly neutralized ionomers may represent the next step in innovation for golf ball cores. Golf ball cores comprising a thermoplastic material are more consistent in quality than thermoset rubber cores.
  • thermoplastic resins such as a highly neutralized ionomer, for a golf ball core is the effect that ambient temperature has on the shape and performance of the golf ball core.
  • Flying distance is an important index used to evaluate the performance of a golf ball. Flying distance is affected by three main factors: "initial velocity”, “spin rate”, and “launch angle”. Initial velocity is one of the primary physical properties affecting the flying distance of the golf ball.
  • the coefficient of restitution (COR) is an alternate parameter of initial velocity of the golf ball, and the temperature will affect the COR.
  • the COR is generally defined as the ratio of velocity of an object before and after an impact.
  • a COR of 1 is a perfect elastic collision where no energy is lost due to the collision, and a COR of 0 is a perfect inelastic collision, where all of the energy is dissipated during the collision.
  • the physical properties, including the COR, of the golf ball will be affected when the temperature is lower or higher than 24 degrees Celsius.
  • the COR is significantly positive relative to the ambient temperature, so the golf ball usually flies shorter in a cold weather.
  • performance is affected by long-term exposure to high temperatures. Due to the habits of many golfers, golf balls may be routinely subjected to long-term exposure to high temperatures. For example, many golfers tend to leave their golf balls in their golf bags and in their car trunks. Golfers may live in areas where daytime, or even nighttime temperatures regularly exceed 30 degrees Celsius, particularly during daylight hours during the summer. Inside a car trunk, the temperature may reach 50 degrees Celsius for extended periods of time.
  • golf balls When exposed to relatively high ambient temperatures for extended periods, golf balls tend to lose their original performance characteristics.
  • the material of the core or the cover layers may distort or lose their shape, particularly when the temperature cycles between relatively high ambient temperatures and relatively low ambient temperatures, such as the ambient temperature changes over the course of a day. This results in loss of distance and feel.
  • the invention provides a golf ball comprising a core, said core comprising a thermoplastic material; an intermediate layer enclosing said core to form an inner ball, said intermediate layer comprising a thermoset material; and a cover enclosing said inner ball, wherein said golf ball satisfies the following requirements: (1) said inner ball has a first deflection amount of 2.2 to 3.2 millimeters under a load of 10 to 130 kilograms when said inner ball is kept in an environment of 24 degrees Celsius for at least about eight hours, (2) said inner ball has a second deflection amount under a load of 10 to 130 kilograms when said inner ball is kept in an environment of about 50 degrees Celsius for at least about 8 hours, and wherein the ratio of the second deflection amount to the first deflection amount is between about 1.05 and about 1.15, and (3) said core has a coefficient of restitution at 40 meters per second falling between approximately 0.79 and 0.89 and higher than that of said golf ball.
  • the invention provides a golf ball comprising a core, said core comprising a thermoplastic material; an intermediate layer enclosing said core to form an inner ball, said intermediate layer comprising a thermoset material; and a cover enclosing said inner ball and having a plurality of dimples on its outer surface, wherein said golf ball satisfies the following requirements: (1) said inner ball has a first deflection amount of 2.2 to 3.2 millimeters under a load of 10 to 130 kilograms when said inner ball is kept in an environment of 24 degrees Celsius for at least about 8 hours, (2) said inner ball has a second deflection amount under a load of 10 to 130 kilograms when said inner ball is kept in an environment of 50 degrees Celsius for at least about 8 hours, and the ratio of the second deflection amount to the first deflection amount is between about 1.05 and about 1.15, (3) said core has a coefficient of restitution at forty (40) meters per second falling between approximately 0.79 and 0.89 and higher than that of said golf ball, and (4) said
  • FIG. 1 is a perspective view of a golf ball
  • FIG. 2 is a cross-sectional view of a first embodiment of the golf ball shown in FIG. 1 ;
  • FIG. 3 is a cross-sectional view of a second embodiment of the golf ball shown in FIG. 1 .
  • FIG. 1 shows a perspective view of a solid golf ball 100 according to the invention.
  • Golf ball 100 is generally spherical in shape with a plurality of dimples 102 disposed on the surface of golf ball 100. Any number of dimples 102 may be provided on the surface of golf ball 100. In some embodiments, the number of dimples 102 may range from about 250 to about 500. In some embodiments, the number of dimples 102 may range from about 300 to about 400. Dimples 102 may be arranged on the surface of golf ball 100 in any pattern.
  • dimples 102 may have any shape known in the art, such as elliptical, polygonal, or the like. While in some embodiments dimples 102 may be protrusions extending away from the surface of golf ball 100, dimples 102 are typically indentations in the surface of golf ball 100. Each indentation defines a volume. For example, if a dimple is a hemispherical indentation in the surface, the space carved out by the dimple and bounded by an imaginary line representing where the surface of golf ball 100 would be if no dimple were present has a volume of a hemisphere, or 2/3 ⁇ r 3 , where r is the radius of the hemisphere.
  • all dimples 102 may have the same diameter or radius. In other embodiments, dimples 102 may be provided with different diameters or radii. In some embodiments, each dimples may have a diameter or radius selected from a preselected group of diameters/radii. In some embodiments, the number of different diameters/radii in the preselected group of diameters/radii ranges from three (3) to six (6). In some embodiments, the number of dimples 102 with the greatest diameter/radius is greater than the number of dimples with any other diameter/radius. In other words, in such an embodiment, there are more of the largest dimples than dimples of any other size.
  • the aggregate of the volumes of all of dimples 102 on the surface of golf ball 100 is a total dimple volume.
  • the total dimple volume is about 550 cubic millimeters to about 800 cubic millimeters. In some embodiments, the total dimple volume may range from about 600 cubic millimeters to about 800 cubic millimeters.
  • golf ball 100 is generally constructed as a multilayer solid golf ball. In other words, multiple layers of material are fused or compressed together to form the ball. As shown in FIG. 2 , one embodiment of golf ball 100 includes a core 104, a cover 108, and an intermediate layer 106 sandwiched between core 104 and intermediate layer 106. Together, core 104 and intermediate layer 106 may be considered to be an "inner ball”.
  • Core 104 comprises a thermoplastic material.
  • the thermoplastic material of core 104 may be an ionomer resin, a highly neutralized acid polymer composition, a polyamide resin, a polyester resin, a polyurethane resin, and combinations thereof.
  • core 104 comprises an ionomer resin.
  • core 104 may include HPF and Surlyn®, both commercially available from E. I. Dupont de Nemours and Company, and IOTEK®, commercially available from Exxon Corporation.
  • one composition of core 104 includes HPF as the main composition with Surlyn® and/or IOTEK® as optional sub-compositions. Any sub-composition of core 104 may be in an amount of 0 to 40 parts by weight, or in some embodiments, 0 to 10 parts by weight, based on 100 parts by weight of the main composition of core 104.
  • Core 104 may be made using any method known in the art, such as hot-press molding or injection molding. Core 104 of the present invention may be single layer or multilayer construction, and as well as the aforementioned materials, any other materials may be also used to make core 104.
  • the material of core 104 is selected to provide core 104 with a COR at 40 meters per second ranging between about 0.79 and 0.89. Core 104 has a higher COR than that of golf ball 100 taken as a whole.
  • the diameter of core 104 may range from about 19.0 millimeters and about 32 millimeters.
  • intermediate layer 106 covers and substantially encloses core 104.
  • Intermediate layer 106 has an interior surface facing an exterior surface of core 104.
  • the exterior surface of intermediate layer 106 faces an interior surface of cover 108.
  • Intermediate layer 106 may have any thickness. In one embodiment, the thickness of intermediate layer 106 may range from about 3 millimeters to about 11 millimeters.
  • Intermediate layer 106 comprises a thermoset material.
  • the thermoset material may be a rubber composition.
  • the base rubber of the rubber composition may include 1,4-cis-polybutadiene, polyisoprene, styrene-butadiene copolymers, natural rubber, and combinations thereof.
  • 1,4-cis-polybutadiene may be used as the base rubber of the rubber composition.
  • 1,4-cis-polybutadiene can be used as the base material for intermediate layer 106, with additional materials added to the base material.
  • the amount of 1,4-cis-polybutadiene is at least 50 parts by weight, based on 100 parts by weight of the rubber composition.
  • Additives such as a crosslinking agent and a filler with a greater specific gravity may be added to the rubber composition.
  • the suitable crosslinking agent can be selected from the group consisting of peroxide, zinc diacrylate, magnesium acrylate, zinc methacrylate, and magnesium methacrylate.
  • zinc acrylate may be used.
  • peroxide may be used as the cross-linking agent.
  • core 104 is formed from a high resilient thermoplastic material, the performance of golf ball 100 is maintained in spite of long-term exposure to relatively high ambient temperatures when intermediate layer 106 is formed from a peroxide cross-linked polybutadiene material.
  • golf ball 100 when intermediate layer 106 is formed from a peroxide cross-linked polybutadiene material and core 104 may include a high resilient thermoplastic material, golf ball 100 may be stored at 24 degrees Celsius for at least about 8 hours.
  • the inner ball (core 104 and intermediate layer 106) may have a first deflection amount of 2.2 millimeters to about 3.2 millimeters under a load of about 10 kilograms to about 130 kilograms when golf ball 100 is stored in an environment of about 24 degrees Celsius for at least about 8 hours.
  • golf ball 100 may have a different deflection, the second deflection amount.
  • the ratio of the second deflection amount to the first deflection amount is between about 1.05 and about 1.15.
  • Example ball is made according to the invention.
  • core 104 includes HPF2000, a DuPont ionomer resin in which the MAA acid groups have been fully neutralized with magnesium ions.
  • Intermediate layer 106 includes BR compound, a peroxide cross-linked polybutadiene material, the specific composition of which is shown in Table 2.
  • Comparative 1 where the entire inner ball includes HPF2000 and Comparative 2, where the entire inner ball comprises Surlyn8940, a Dupont ionomer resin - Ethylene/methacrylic acid (E/MAA) copolymer, in which the MAA acid groups have been partially neutralized with sodium ions.
  • E/MAA Dupont ionomer resin - Ethylene/methacrylic acid
  • Table 1 Comparison of Example Ball Performance with Conventional Balls Example Comparative 1 Comparative 2 Core HPF2000 HPF2000 Surlyn8940 Intermediate layer BR Core diameter(mm) 28.0 Inner ball diameter (mm) 39.3 39.3 39.3 Compression Test (10-130kg) Second Deflection Amount after storage at 50 degrees C for 8hrs (mm) 3.13 3.27 2.21 First Deflection Amount after storage at 24 degrees C for 8hrs (mm) 2.84 2.66 1.54 Ratio of Second Deflection Amount to First Deflection Amount 1.10 1.23 1.44 COR 0.838 0.825 0.726 Table 2: BR Compound Composition TAIPOLTM BR0150 100 Zinc diacrylate 28 Zinc oxide 6 Barium sulfate 39.5 Peroxide 1
  • the deflection performance of the Example ball is greater than that of Comparative 1 and Comparative 2 after exposure to high ambient temperatures.
  • the ratio of the second deflection amount to the first deflection amount of the Example ball is about 1.1, while the other balls have a ratio of 1.23 and 1.44, respectively. This means that the Comparative balls are less capable of holding their shape and resisting compression after long exposure to high temperatures than the Example ball. Further the COR of the Example ball is greater than either of the Comparative balls.
  • a suitable filler may be added in the rubber composition, such as zinc oxide, barium sulfate, calcium carbonate, and magnesium carbonate, and in the present invention, zinc oxide is preferred.
  • a metal powder with a greater specific gravity may also be used as the filler, such as tungsten.
  • an exterior surface of intermediate layer 106 faces an interior surface of cover 108.
  • the exterior surface of cover 108 is the exterior surface of golf ball 100, which is shown in FIG. 1 .
  • Cover 108 may include any material known in the art.
  • cover 108 may include an ionomer resin, a highly neutralized ionomer resin, a polyamide resin, a polyester resin, a thermoplastic polyurethane resin, a thermoset polyurethane resin, or combinations of these compounds.
  • inner cover layer 110 In the embodiment shown in FIG. 3 , an additional cover layer is provided: inner cover layer 110.
  • cover 108 may be considered to be an outer cover layer.
  • Inner cover layer 110 may comprise the same material as that of outer cover layer 108.
  • the thickness of inner cover layer 110 may range between about 0.5 millimeters and 11.0 millimeters. In some embodiments, the thickness of inner cover layer 110 may range between about 0.5 millimeters and about 8.5 millimeters. In some embodiments, the thickness of inner cover layer 110 may range between about 0.5 millimeters and about 3.0 millimeters.
  • Inner cover layer 110 has an interior surface that faces an exterior surface of intermediate layer 106. Inner cover layer 110 covers and encloses intermediate layer 106. Inner cover layer 110 has an exterior surface that faces an interior surface of outer cover layer 108.
  • the exterior surface of inner cover layer 110 has a higher hardness than the exterior surface of cover 108.
  • an exterior surface of inner cover layer 110 may have a Shore D hardness of 45 to 65, while the exterior surface of outer cover layer 108 may have a Shore D hardness of 40 to 60.
  • the entirety of inner cover layer 110 has a higher hardness than the entirety of cover 108.

Claims (10)

  1. Balle de golf (100), comprenant :
    un noyau (104), ledit noyau (104) comprenant un matériau thermoplastique ;
    une couche intermédiaire (106) entourant ledit noyau (104) pour former une balle interne, ladite couche intermédiaire (106) comprenant un matériau thermodurcissable ; et
    une enveloppe (108) entourant ladite balle interne,
    caractérisée en ce que :
    (1) ladite balle interne est constituée d'un matériau et possède une géométrie tels qu'elle présente une première déflexion de 2,2 à 3,2 millimètres sous une charge de 10 à 130 kilogrammes lorsque ladite balle interne est maintenue dans un environnement à 24 degrés Celsius durant au moins huit heures,
    (2) ladite balle interne est constituée d'un matériau et possède une géométrie tels qu'elle présente une deuxième déflexion sous une charge de 10 à 130 kilogrammes lorsque ladite balle interne est maintenue dans un environnement à 50 degrés Celsius durant au moins 8 heures, et dans laquelle le ratio de la deuxième déflexion par la première déflexion est compris entre environ 1,05 et environ 1,15, et
    (3) ledit noyau (104) est constitué d'un matériau et possède une géométrie tels qu'il présente un coefficient de restitution lors d'une chute à 40 mètres par seconde compris entre approximativement 0,79 et 0,89 et supérieur à celui de ladite balle de golf (100).
  2. Balle de golf (100) selon la revendication 1, dans laquelle ladite enveloppe (108) présente une pluralité de fossettes (102) sur sa surface, et dans laquelle la pluralité de fossettes (102) présente un volume total de 550 à 800 millimètres cubes.
  3. Balle de golf (100) selon la revendication 2, dans laquelle lesdites fossettes (102) présentent un nombre total de 250 à 500, et dans laquelle lesdites fossettes (102) présentent de 3 à 6 types ayant des diamètres différents.
  4. Balle de golf (100) selon la revendication 3, dans laquelle le nombre de fossettes (102) ayant le diamètre le plus grand est supérieur au nombre respectif de toutes les autres fossettes (102) de diamètres inférieurs.
  5. Balle de golf (100) selon la revendication 1, 2 ou 3, dans laquelle ledit noyau (104) présente un diamètre de 19 à 32 millimètres.
  6. Balle de golf (100) selon la revendication 1, 2 ou 3, dans laquelle ladite couche intermédiaire (106) présente une épaisseur de 3 à 11 millimètres.
  7. Balle de golf (100) selon la revendication 1, 2 ou 3, dans laquelle ledit matériau thermoplastique est sélectionné parmi le groupe constitué par une résine ionomère, une composition polymère acide hautement neutralisée, une résine polyamide, une résine polyester, une résine polyuréthane, et toute combinaison de celles-ci.
  8. Balle de golf (100) selon la revendication 1, 2 ou 3, dans laquelle ladite enveloppe (108) comprend une couche d'enveloppe interne entourant ladite balle interne et une couche d'enveloppe externe entourant ladite couche d'enveloppe interne, dans laquelle ladite couche d'enveloppe externe présente une dureté Shore D inférieure à celle de ladite couche d'enveloppe interne.
  9. Balle de golf (100) selon la revendication 8, dans laquelle ladite couche d'enveloppe interne comprend une surface externe présentant une dureté Shore D de 45 à 65, et dans laquelle ladite couche d'enveloppe externe comprend une surface externe présentant une dureté Shore D de 40 à 60.
  10. Balle de golf (100) selon la revendication 1, 2, 3, 8 ou 9, dans laquelle ladite couche d'enveloppe comprend un matériau sélectionné parmi le groupe constitué par une résine ionomère, une composition polymère acide hautement neutralisée, une résine polyamide, une résine polyester, une résine polyuréthane thermoplastique, une résine polyuréthane thermodurcissable, et toute combinaison de celles-ci.
EP11154682.6A 2010-02-19 2011-02-16 Balle de golf solide multicouche Not-in-force EP2361657B1 (fr)

Applications Claiming Priority (1)

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US12/708,800 US20110053707A1 (en) 2009-02-19 2010-02-19 Multilayer Solid Golf Ball

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EP2361657A1 EP2361657A1 (fr) 2011-08-31
EP2361657B1 true EP2361657B1 (fr) 2014-05-21

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US (1) US20110053707A1 (fr)
EP (1) EP2361657B1 (fr)
JP (1) JP2011167517A (fr)
KR (1) KR101129150B1 (fr)
CN (3) CN104368132A (fr)
AU (1) AU2011100184B4 (fr)
CA (1) CA2730693C (fr)
TW (1) TWI490014B (fr)

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Also Published As

Publication number Publication date
EP2361657A1 (fr) 2011-08-31
US20110053707A1 (en) 2011-03-03
CN104368132A (zh) 2015-02-25
CN102166405A (zh) 2011-08-31
KR20110095828A (ko) 2011-08-25
JP2011167517A (ja) 2011-09-01
TW201129406A (en) 2011-09-01
CN202199049U (zh) 2012-04-25
AU2011100184B4 (en) 2013-05-16
AU2011100184A4 (en) 2011-03-10
CA2730693A1 (fr) 2011-04-19
KR101129150B1 (ko) 2012-03-23
CA2730693C (fr) 2012-01-10
TWI490014B (zh) 2015-07-01

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