TW201332616A - Golf ball having high initial velocity - Google Patents

Abstract

A golf ball having a variable initial velocity associated with striking the golf ball with a driver having different head speeds in disclosed. The structure of the disclosed golf ball may cause the golf ball to experience an initial velocity comparable to premium golf balls currently on the market when hit with a driver head speed less than 100 mph. However, the same golf ball may experience an initial velocity higher than premium golf balls currently on the market when hit with a driver head speed higher than 125 mph. As a result, the disclosed golf ball may have different initial velocity associated with different head speed.

Description

Golf ball with high initial speed

This application is based on 35 USC § 119(e), entitled "Golf Ball Having High Initial Velocity", and U.S. Provisional Patent Application No. 61/526,594, filed on Aug. 23, 2011. The priority of the number is hereby incorporated by reference.

Background of the invention

The present invention is generally directed to a golf ball having different ball striking characteristics in different situations.

Golf tournaments are an increasingly popular sport at both the amateur and professional levels. A wide range of techniques relating to the manufacture and design of golf balls are well known in the art. These techniques have produced golf balls with a variety of hitting characteristics. For example, some golf balls have a greater initial speed than other golf balls.

The great difference between amateur golfers and professional golfers is the speed of the kicking wood head produced by these types of golfers. Amateur players often have a head speed of less than 100 mph, while professional players often have a head speed of more than 125 mph. The current premium ball can meet the needs of low to medium club head speeds. However, these balls do not have a high initial speed at a head speed of more than 125 mph. Therefore, it would be advantageous to manufacture a golf ball that meets the needs of golfers of different levels.

summary

The present invention discloses a golf ball with a golf club having a different head speed to strike the golf ball, the ball having a variable initial velocity. The disclosed golf ball structure allows the golf ball to achieve an initial speed comparable to that of current premium golf balls currently on the market when struck at a speed of less than 100 mph. However, the same golf ball can achieve a higher initial speed than the current premium golf ball currently on the market when struck at a speed of more than 125 mph. Thus, the disclosed golf ball can have different initial velocities with different head speeds.

In one aspect, the present invention provides a golf ball having an inner core layer, a core layer surrounding the inner core layer, an inner cover layer surrounding the outer core layer, and an inner cover layer Cover layer outside the overlay. The inner core layer may have a higher elastic recovery coefficient than the outer core layer, the inner cover layer and the outer cover layer. Performing the 125 mph head speed test on the golf ball provides the golf ball with an initial speed ranging from about 173 mph to about 174 mph. When the golf ball is struck with the driver's club at a head speed of about 80 mph, the golf ball may have an initial speed ranging from about 87 mph to about 90 mph. When the golf ball is struck with the driver of the club at a head speed of about 95 mph, the golf ball can have an initial speed ranging from about 115 mph to about 117 mph. When the golf ball is struck with the driver of the club at a head speed of about 110 mph, the golf ball can have an initial speed ranging from about 158 mph to about 160 mph. The inner core layer can include a first high neutralizing acidic polymer composition. The first high-grade and acidic polymer composition can be packaged One of HPF 2000 and HPF AD 1035. The inner core layer can include a second high neutralizing acidic polymer composition. The inner core layer can have an elastic recovery coefficient value ranging from about 0.795 to about 0.81. The inner core layer may have an elastic recovery coefficient value that is greater than the elastic recovery coefficient value of the golf ball by from about 0.005 to about 0.02. The inner cover layer can have a Shore D hardness ranging from about 45 to about 55.

In one aspect, the present invention provides a golf ball having an inner core layer, a core layer surrounding the inner core layer, an inner cover layer surrounding the outer core layer, and an inner cover layer Cover layer outside the overlay. Performing the 125 mph head speed test on the golf ball allows the golf ball to have a first initial speed. Performing the 80 mph head speed test on the golf ball allows the golf ball to have a second initial speed. The first initial speed may be about 85 mph to about 87 mph higher than the second initial speed. Performing the 110 mph head speed test on the golf ball causes the golf ball to have a third initial speed, and the third initial speed is about 85 mph to about 87 mph higher than the second initial speed. Performing the 95 mph head speed test on the golf ball causes the golf ball to have a third initial speed, and the third initial speed is about 27 mph to about 29 mph higher than the second initial speed. The inner core layer can include a first high neutralizing acidic polymer composition. The first high neutralizing acidic polymer composition can include one of HPF 2000 and HPF AD 1035. The inner core layer may include a first high neutralizing acidic polymer composition and a second high neutralizing acidic polymer composition and the first high neutralizing acidic polymer composition is neutralized to the second high neutralizing acidic polymer The proportion of polymer composition can range from about 20:80 to about 80:20. The inner core layer may have an elastic recovery coefficient value that is greater than the elastic recovery coefficient value of the golf ball by from about 0.005 to about 0.02.

In one aspect, the present invention provides a golf ball having an inner core layer, a core layer surrounding the inner core layer, an inner cover layer surrounding the outer core layer, and an inner cover layer Cover layer outside the overlay. The inner core layer may have a higher elastic recovery coefficient than the outer core layer, the inner cover layer and the outer cover layer. Performing the 125 mph head speed test on the golf ball provides the golf ball with an initial speed ranging from about 173 mph to about 174 mph. Performing the 95 mph head speed test on the golf ball provides the golf ball with an initial speed ranging from about 115 mph to about 117 mph. The inner core layer can include at least two first high neutralizing acidic polymer compositions. The inner core layer may have an elastic recovery coefficient value that is greater than the elastic recovery coefficient value of the golf ball by from about 0.005 to about 0.02. Performing the 110 mph head speed test on the golf ball allows the golf ball to have an initial speed ranging from about 158 mph to about 160 mph.

Other systems, methods, features, and advantages of the present invention will be or become apparent to those skilled in the <RTIgt; All of these additional systems, methods, features, and advantages are intended to be included within the scope of the present invention and are intended to be protected by the scope of the following claims.

100‧‧‧ Golf

110‧‧‧ inner core layer

120‧‧‧ outer core layer

130‧‧‧ inner cover

140‧‧‧ outer cover

142‧‧‧Amateur golfer

144‧‧‧Kicking wood

146‧‧‧ tee

148‧‧‧ teeing ground

150‧‧‧track

152‧‧‧Professional golfers

160,162‧‧‧ track

180‧‧‧track

182‧‧‧ Golf

The invention will be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, In addition, in the figure, similar symbols represent corresponding parts in all different figures Pieces.

Figure 1 shows a trajectory of a golf ball prepared in accordance with the present invention as compared to a trajectory of a different type of golf ball after being struck by a kicking wood; Figure 2 shows a golf ball being prepared in accordance with the present invention. The trajectory after the smashing strut is struck; and FIG. 3 is a golf ball according to an exemplary embodiment of FIGS. 1 and 2.

Detailed description

In general, the present invention relates to a golf ball having a variable initial speed associated with striking a tee shot with different head speeds. The disclosed golf ball structure allows the golf ball to achieve an initial speed comparable to that of current premium golf balls currently on the market when struck at a speed of less than 100 mph. However, the same golf ball can achieve a higher initial speed than the current premium golf ball currently on the market when struck at a speed of more than 125 mph. Thus, the disclosed golf ball can have different initial velocities with different head speeds.

1 through 2 show an exemplary embodiment of a golf ball 100. In FIG. 1, an amateur golfer 142 has used a tee shot 144 to strike the golf ball 100 and another golf ball, i.e., the golf ball 182 has left a tee 146 in one of the teeing grounds 148. As a typical amateur golfer, golfer 142 strikes golf ball 100 and golf ball 182 at a kicker head speed of less than 100 mph. Figure 1 shows that after each golf ball has been struck by the kicking wood 144, one of the golf balls 100 tracks 150 with the golf ball 182 a comparison between one of the tracks 180. Each golf ball has a similar track length because each golf ball has a similar initial velocity with one of the tee shot speeds of less than 100 mph, which is struck by the kicked wood 144. Because the golf ball 100 has a similar initial velocity after being struck by the tee shot 144 at a kicker head speed of less than 100 mph, the trajectory 150 extends approximately as long as the trajectory 180.

In FIG. 2, a professional golfer 152 has used a tee shot 144 to strike the golf ball 100 and another golf ball, i.e., the golf ball 182 is out of a tee 146 in a teeing zone 148. As a typical professional golfer, golfer 152 strikes golf ball 100 and golf ball 182 at a kicker head speed greater than 125 mph. 2 shows a comparison between one of the tracks 160 of the golf ball 100 and one of the tracks 182 of the golf ball 182 after each golf ball has been struck by the kicking wood 144. Because the golf ball 100 and the golf ball 182 each have a different initial velocity associated with the kicked wood 144 striking at a kicker wood speed greater than 125 mph, the trajectory 160 is longer than the trajectory 162. When the kicked wood 144 strikes at a kicker head speed greater than 125 mph, the golf ball 100 has an initial speed that is higher than the initial speed of the golf ball 182 and, in turn, the golf ball 100 flies more than the golf ball 182. far.

Tables 3 through 6 show the results of tests performed on most test balls, including golf balls made in accordance with the present invention and existing golf balls currently commercially available. The golf ball prepared in accordance with the present invention includes Example 1, and the details of Example 1 are shown in Table 1. Materials A, B, C and D are described in more detail with reference to Tables 8 to 11. Existing golf currently available on the market The balls included Comparative Examples 1 to 4, and the details of the Comparative Examples 1 to 4 are shown in Table 2 (wherein PBR is a polybutadiene rubber). The results shown in Tables 3 to 6 include the initial velocity (IV) and the firing angle (LA). All results of IV have an error of ±1 mph.

The tests performed on the test balls were carried out as follows: a Nike SQ Dymo kick-off wood (inclination: 10.5°; club: Diamana of Mitsubishi Rayon; flexibility: X (very hard); handle:)) A swinging robot arm manufactured by Miyamae Corporation and then swung at a head speed of from about 80 mph to about 125 mph. The face is oriented for a sqare hit. The forward/backward tee position is adjusted such that the tee is three inches ahead of the point at which the club is vertical when the club is down. The height of the tee and the toe-heel position of the club relative to the tee are adjusted such that the center of the impact marker is centered across the toe to the heel.

Table 3 shows the results of the 125 mph head speed test. The 125 mph head speed test involves striking the test balls with one of the heads having a head speed of about 125 mph ± 1 mph. The tee shots used in the tests of Table 3 are as described above. The calibration ball for this 125 mph head speed test is an ONE Tour D golf ball available from Nike Golf. To calibrate the 125 mph head speed test, the conditions were set such that the calibration ball had an initial velocity of 171 mph ± 1 mph when striking the calibration ball with a driver kick having a head speed of about 125 mph ± 1 mph.

These results show that for the 125 mph head speed test, the initial speed of the golf ball prepared in accordance with the present invention is higher than the initial speed of existing golf balls currently available on the market. For example, Comparative Example 2 has an initial velocity of about 171 mph. Conversely, Example 1 has a higher initial velocity of approximately 174 mph. The second highest initial velocity obtained from the 125 mph head speed test was from Comparative Example 1. At about 172.5 mph, this initial speed Still less than the initial speed of Example 1.

Table 4 shows the results of the 110 mph head speed test. The 110 mph head speed test involves striking the test balls with one of the heads having a head speed of about 110 mph ± 1 mph. The tee shots used in the tests of Table 4 are as described above. The calibration ball for the 110 mph head speed test is an ONE Tour D golf ball available from Nike Golf. To calibrate the 110 mph head speed test, the conditions were set such that the calibration ball had an initial velocity of 159 mph ± 1 mph when striking the calibration ball with a driver kick having a head speed of about 110 mph ± 1 mph.

These results show that for the 110 mph head speed test, the initial speed of the golf ball prepared in accordance with the present invention is comparable to the initial speed of existing golf balls currently available on the market. For example, Comparative Example 2 has an initial velocity of about 159 mph. Similarly, Example 1 has an initial velocity of approximately 159.5 mph. The initial speeds of the comparative examples obtained from the 110 mph head speed test were all within about 157 mph and about 159.5 mph.

Table 5 shows the results of the 95 mph head speed test. The 95 mph head speed test involves striking the test balls with one of the heads having a head speed of about 95 mph ± 1 mph. The tee shots used in the tests of Table 5 are as described above. The calibration ball for the 95 mph head speed test is an ONE Tour D golf ball available from Nike Golf. To calibrate the 95 mph head speed test, the conditions are set such that the calibration ball has an initial speed of 116.5 mph ± 1 mph when striking the calibration ball with a driver kick having a head speed of about 95 mph ± 1 mph. .

These results show that for the 95 mph head speed test, the initial speed of the golf ball prepared in accordance with the present invention is comparable to the initial speed of existing golf balls currently available on the market. For example, Comparative Example 1 has an initial velocity of approximately 116 mph. Similarly, Example 1 has an initial velocity of approximately 116 mph. The initial speeds of the comparative examples obtained from the 95 mph head speed test were all about 116 mph or about 116.5 mph.

Table 6 shows the results of the 80 mph head speed test. The 80 mph head speed test involves striking the test balls with one of the heads having a head speed of about 80 mph ± 1 mph. The tee shots used in the tests of Table 4 are as described above. The calibration ball for the 80 mph head speed test is an ONE Tour D golf ball available from Nike Golf. To calibrate the 80 mph head speed test, the conditions are set such that the calibration ball has an initial velocity of 89.5 mph ± 1 mph when striking the calibration ball with a driver kick having a head speed of about 80 mph ± 1 mph. .

These results show that for the 80 mph head speed test, the initial speed of the golf ball prepared in accordance with the present invention is comparable to the initial speed of existing golf balls currently available on the market. For example, Comparative Example 1 has an initial velocity of about 88 mph. Similarly, Example 1 has an initial velocity of approximately 88 mph. The initial speeds of the comparative examples obtained from the 80 mph head speed test were all within about 87.5 mph or about 89.5 mph.

Table 7 shows the difference between the initial velocities obtained by striking the test balls with a kicking wood at different head speeds.

Unless otherwise stated, the compression, hardness, COR, and flexural modulus used herein are measured as follows: Compression Deformation: This amount of compression deformation herein represents the amount of deformation of the ball under a force; in detail, When the force is increased from 10 kg to 130 kg, the amount of deformation of the ball is reduced by the force of 130 kg minus the amount of deformation of the ball under the force of 10 kg to become the amount of compression deformation of the ball.

Hardness: The hardness of the golf ball layer is generally measured in accordance with ASTM D2240, but is measured on the land area of a curved surface of one of the molded balls. For material hardness, it is measured according to ASTM D2240 (on a plaque).

Method of measuring COR: A test golf ball is launched by an air cannon at an initial speed of 40 m/sec, and a speed monitoring device is disposed at a distance of 0.6 to 0.9 m above the cannon. When the strike is positioned away from the empty When the gas cannon is about 1.2 meters thick, the golf ball rebounds through the speed monitoring device. The return speed divided by the initial speed is the COR.

As shown in FIG. 3, the golf ball 100 can include an inner core layer 110, an outer core layer 120, an inner cover layer 130, and an outer cover layer 140. While the exemplary embodiment of golf ball 100 has been illustrated and shown as having four layers, other embodiments may include any number of layers. For example, in some embodiments, the golf ball 100 can be a one-piece, two-piece, three-piece, or five-piece ball. In certain embodiments, the golf ball 100 can include more than five layers. The number of layers can be selected based on a variety of factors. For example, the number of layers may be selected depending on the type of material used to make the golf ball and/or the size of the golf ball.

The type of material used to make the layer of the golf ball can be selected based on a variety of factors. For example, the type of material used to make the layer of the golf ball may be selected based on the nature of the material and/or the procedure used to form the layers. Exemplary materials are described below for individual layers of the exemplary embodiment. In certain embodiments, one or more layers can be made from different materials. In certain embodiments, one or more layers can be made of the same material.

The golf ball can be made by any suitable procedure. The procedure for making the golf ball can be selected based on a variety of factors. For example, the procedure for manufacturing the golf ball may be selected depending on the type of material used and/or the number of layers included. Exemplary procedures are described below for individual layers of the exemplary embodiment.

In some embodiments, the inner core layer 110 can have a diameter ranging from 19 mm to 32 mm. In some embodiments, the inner core layer 110 can have a diameter ranging from 20 mm to 30 mm. In some embodiments, the inner core layer 110 can have a diameter ranging from 21 mm to 28 mm. In some implementations In one example, the inner core layer 110 may have a diameter that is at least three times greater than the thickness of the outer core layer 120.

The inner core layer 110 can be made by any suitable procedure. For example, in some embodiments, the inner core layer 110 can be formed by an injection molding process. In the injection molding process, the temperature of the extruder can be set to range from about 190 ° C to about 220 ° C. In certain embodiments, at least two of the high neutralizing acidic polymer compositions may remain sealed in a moisture resistant dryer that produces dry air prior to the injection molding process. The drying conditions of the high-neutralized acidic polymer composition may include a temperature of less than 50 ° C for 2 to 24 hours. In some embodiments, the inner core layer 110 can be formed by a compression molding process. The procedure for making the inner core layer can be selected based on a variety of factors. For example, the procedure for making the inner core layer can be selected based on the type of material used to make the inner core layer and/or the procedure used to make the other layers.

In certain embodiments, the inner core layer 110 can include one or more high neutralizing acidic polymer compositions. For example, in these exemplary embodiments, inner core layer 110 can include two high neutralizing acidic polymer compositions. In certain embodiments, the ratio of a first high neutralizing acidic polymer composition to a second high neutralizing acidic polymer composition can range from 20:80 to 80:20. In another embodiment, the same ratio range can be from 30:70 to 70:30. In another embodiment, the same ratio range may range from 40:60 to 60:40. In yet another embodiment, the same ratio range can be 50:50. In certain embodiments, two high neutralizing acidic polymer compositions each having a flexural modulus ranging from 20,000 psi to 35,000 psi can be used to make the inner core layer 110. In certain embodiments, each has a temperature ranging from 50 ° C to 60 ° C, or 52 ° C Two high-neutralized acidic polymer compositions of a Fica softening temperature of 58 ° C can be used to make the inner core layer 110. In certain embodiments, materials suitable for the inner core layer may include the following high neutralizing acidic polymer compositions manufactured entirely by EIDupont de Nemours and Company: HPF1000, HPF2000, HPF AD1027, HPF1030, HPF AD1035, HPF AD1040.

Table 8 provides an example of a material used to fabricate the inner core layer 110 in accordance with the exemplary embodiment. The amounts of the materials listed in Table 8 are expressed in parts by weight (pbw).

In certain embodiments, the material used to form the inner core layer 110 can include a high neutralizing acidic polymer composition and optional additives, fillers, and/or melt flow modifiers. The acidic polymer can be neutralized to a level equal to or higher than 80%, including up to 100%, of a source of cations such as magnesium, sodium, zinc or potassium. In the exemplary embodiment, the high neutralized acidic polymer composition used to make the inner core layer may comprise the same source of cations. Suitable additives and fillers may include, for example, blow molding and foaming agents, optical brighteners, colorants, phosphors, whitening agents, UV absorbers, light stabilizers, defoamers, processing aids, mica, talc Powder, nano filler, antioxidant, stabilizer, softener, aroma component, plasticizer, impact modifier, acid copolymer wax, surfactant. Suitable fillers may also include inorganic fillers such as zinc oxide, dioxane Titanium, tin oxide, calcium oxide, magnesium oxide, barium sulfide, zinc sulfide, calcium carbide, zinc carbide, tantalum carbide, mica, talc, clay, vermiculite, lead telluride. Suitable fillers may also include high specific gravity metal powder fillers such as tungsten powder and molybdenum powder. Suitable melt flow improvers can include, for example, fatty acids and salts thereof, polyamines, polyesters, polyacrylates, polyurethanes, polyethers, polyureas, polyols, and combinations thereof.

In certain embodiments, the outer core layer 120 can be, for example, "Golf Balls Including Crosslinked Termoplastic Polyurethane" and on June 30, 2010 by Chien - U.S. Patent Application Serial No. 12/827,360, the entire disclosure of which is incorporated herein by reference. When other rubbers are used together with a polybutadiene, the polybutadiene may be included as a main component. For example, in certain embodiments, the proportion of polybutadiene throughout the base rubber can be equal to or greater than 50% by weight. In certain embodiments, the proportion of polybutadiene in the entire base rubber may be equal to or greater than 80% by weight. In certain embodiments, a polybutene having a cis 1,4 bonding ratio equal to or greater than 60 mol%, and further, equal to or greater than 80 mole% may be used.

In certain embodiments, cis 1,4-butadiene can be used as the base rubber and mixed with other ingredients to form the outer core layer 120. In certain embodiments, the amount of cis 1,4-butadiene may be at least 50 parts by weight based on 100 parts by weight of the rubber compound. Various additives may be added to the base rubber to form a compound. The additives may include a crosslinking agent and a filler. In certain embodiments, the crosslinking agent can be zinc diacrylate, magnesium acrylate, zinc methacrylate, or magnesium methacrylate. In certain embodiments, zinc diacrylate can provide advantageous elastic properties. The filler can be used to increase the specific gravity of the material. The filler may include zinc oxide, barium sulfate, calcium carbonate, or magnesium carbonate. In certain embodiments, zinc oxide may be selected for its advantageous properties. A metal powder such as tungsten may also be used as a filler to achieve a desired specific gravity. In certain embodiments, the outer core layer 120 may have a specific gravity of from about 1.05 g/cm ³ to about 1.45 g/cm ³ . In certain embodiments, the outer core layer 120 may have a specific gravity of from about 1.05 g/cm ³ to about 1.35 g/cm ³ .

In certain embodiments, one of the polybutadienes can be synthesized using a rare earth element catalyst to form the outer core layer 120. The polybutadiene provides an excellent elastic performance of a golf ball 100. Examples of the rare earth element catalyst may include a lanthanide rare earth element compound, an organoaluminum compound, and an aluminoxane-containing halogen compound. The polybutadiene obtained by using a lanthanide rare earth element catalyst generally uses a lanthanide rare earth (atomic number of 57 to 71) compound such as a ruthenium compound.

In certain embodiments, a polybutadiene rubber composition having at least from about 0.5 parts by weight to about 5 parts by weight of one halogenated organosulfur compound can be used to form the outer core layer 120. In certain embodiments, the polybutadiene rubber composition can include a polybutadiene rubber composition of at least from about 1 part by weight to about 4 parts by weight of one halogenated organosulfur compound. The halogenated organic sulfur compound may be selected from the group consisting of pentachlorothiophenol; 2-chlorothiophenol; 3-chlorothiophenol; 4-chlorothiophenol; 2,3-chlorothiophenol; 2,4- Chlorothiophenol; 3,4-chlorothiophenol; 3,5-chlorothiophenol; 2,3,4-chlorothiophenol; 3,4,5-chlorothiophenol; 2,3,4 , 5-tetrachlorothiophenol; 2,3,5,6-tetrachlorothiophenol; pentafluorothiophenol; 2-fluorothiophenol; 3-fluorothiophenol; 4-fluorothiophenol; 2,3-fluorothiophenol; 2,4- Fluorothiophenol; 3,4-fluorothiophenol; 3,5-fluorothiophenol; 2,3,4-fluorothiophenol; 3,4,5-fluorothiophenol; 2,3,4 ,5-tetrafluorothiophenol; 2,3,5,6-tetrafluorothiophenol; 4-chlorotetrafluorothiophenol; pentaiodothiophenol; 2-iodothiophenol; 3-iodobenzenesulfonate Phenol; 4-iodothiophenol; 2,3-iodothiophenol; 2,4-iodothiophenol; 3,4-iodothiophenol; 3,5-iodothiophenol; 2,3,4 -iodothiophenol; 3,4,5-iodothiophenol; 2,3,4,5-tetraiodothiophenol; 2,3,5,6-tetraiodothiophenol; pentabromothiophenol ; 2-bromothiophenol; 3-bromothiophenol; 4-bromothiophenol; 2,3-bromothiophenol; 2,4-bromothiophenol; 3,4-bromothiophenol; , 5-bromothiophenol; 2,3,4-bromothiophenol; 3,4,5-bromothiophenol; 2,3,4,5-tetrabromothiophenol; 2,3,5, 6-tetrabromothiophenol; and its zinc salt, its metal salts and mixtures thereof.

Table 9 provides an example of materials used to fabricate the core layer 120 in accordance with the exemplary embodiment. The amounts of the materials listed in Table 9 are expressed in parts by weight (pbw). TAIPOL ^TM BR0150 is a trade name of one of the rubbers manufactured by Taiwan Synthetic Rubber Corp.

The outer core layer 120 can be made by any suitable procedure. For example, in some embodiments, the outer core layer 120 can be formed by a compression molding process. The procedure for making the outer core layer can be selected based on a variety of factors. For example, the procedure for manufacturing the outer core layer may be based on the type of material used to make the outer core layer and / or program selection to make other layers.

In some embodiments, the outer core layer 120 can be fabricated by a compression molding process, and the compression molding process includes a vulcanization temperature ranging from 130 ° C to 190 ° C and a vulcanization time ranging from 5 to 20 minutes. . In some embodiments, the vulcanization step can be divided into two stages: (1) the outer core layer material can be placed in an outer core layer forming mold and subjected to an initial vulcanization to produce a pair of semi-vulcanized hemispherical cups and (2) A prefabricated inner core layer can be placed in one of the spherical cups and can be covered by another hemispherical cup and the vulcanization can be completed. In some embodiments, the surface of the inner core layer 110 disposed within the hemispherical cups may be roughened prior to insertion to increase the adhesion between the inner core layer 110 and the outer core layer 120. In some embodiments, the inner core surface may be pre-coated with an adhesive prior to placing the inner core layer 110 in the hemispherical cups to increase the durability of the golf ball and provide a high rebound.

In some embodiments, the inner core layer 110 can have a high elasticity. This high elasticity allows the golf ball 100 to have a larger carry and a distance. In some embodiments, the inner core layer 110 can have a value of elastic recovery coefficient (COR) ranging from 0.79 to 0.89. In some embodiments, the inner core layer 110 can have a COR value ranging from 0.795 to 0.88. The COR value of the inner core layer 110 may be greater than the COR value of the golf ball 100. In some embodiments, the COR value of the inner core layer 110 can be greater than the COR value of the golf ball 100 by 0.005 to 0.02.

In some embodiments, the inner core layer 110 can have a compressive deformation magnitude ranging from 2.5 mm to 5 mm. In some embodiments, the inner core layer 110 can have a compressive deformation magnitude ranging from 3.5 mm to 5 mm. Inner ball The core layer 110 can have a surface Shore D hardness of from 40 to 60. In some embodiments, the outer core layer 120 can have a surface Shore D hardness of 50 to 60 that is higher than the surface hardness of the inner core layer 110. In some embodiments, the outer core layer 120 can have a surface Shore D hardness of 45 to 55.

In some embodiments, the inner core layer 110 can have a Shore D cross-sectional hardness ranging from 40 to 60 at any single point on one of the cross-sections obtained by cutting the inner core layer 110 into half. In some embodiments, the inner core layer 110 can have a Shore D cross-sectional hardness ranging from 45 to 55 at any single point on one of the cross-sections obtained by cutting the inner core layer 110 into half. In certain embodiments, the difference in Shore D cross-sectional hardness of any two points on the same cross-section may be within ±6. In certain embodiments, the difference in Shore D cross-sectional hardness of any two points on the same cross-section may be within ±3.

In some embodiments, the inner core layer 110 can have a smaller specific gravity than the outer layer. This difference in specific gravity allows the golf ball 100 to have a large moment of inertia. In certain embodiments, the inner core layer 110 may have a moment of inertia ranging from about 0.85 g/cm ³ to about 1.1 g/cm ³ . In certain embodiments, the inner core layer 110 may have a moment of inertia ranging from about 0.9 g/cm ³ to about 1.1 g/cm ³ .

In some embodiments, the inner cover layer 130 of the golf ball 100 can have a thickness ranging from 0.5 mm to 1.5 mm. For example, the inner cover 130 can have a thickness of 1 mm. In some embodiments, inner cover layer 130 can have a thickness ranging from 0.8 mm to 1 mm. For example, the inner cover 130 can have a thickness of 0.9 mm.

In certain embodiments, the outer cover 140 of the golf ball 100 can have a thickness ranging from 0.5 mm to 2 mm. For example, outer cover 140 It can have a thickness of 1 mm. In certain embodiments, the outer cover 140 can have a thickness ranging from 1 mm to 1.5 mm. For example, the outer cover 140 can have a thickness of 1.2 mm.

The outer cover layer 140 may have a thickness T1, the inner cover layer may have a thickness T2, and the outer core layer 120 may have a thickness T3. In some embodiments, T1 can be larger than T2. In some embodiments, T1 and T3 can have the following relationship: 5T1 T3 10T1

In certain embodiments, the inner cover layer 130 can have a Shore D hardness ranging from 60 to 80 when measured on a curved surface. In certain embodiments, the outer cover 140 of the golf ball 100 can have a Shore D hardness ranging from 40 to 60 when measured on a curved surface. In order to have one of the low-rotation performance and good strike sensing of the driver of the driver, the inner cover 130 may have a higher flexural modulus than the outer cover 140. In certain embodiments, the inner cover 130 can have a flexural modulus ranging from 50,000 psi to 100,000 psi, or from 60,000 psi to 100,000 psi and the outer cover 140 can have a range from 200 psi to 3,000 psi, or Flexural modulus from 300 psi to 2,000 psi. In some embodiments, the inner cover layer 130 can have a first flexural modulus and the outer cover layer 140 can have a second flexural modulus, and the first flexural modulus versus the second flexural modulus The ratio (first flexural modulus / second flexural modulus) may range from 10 to 30. In certain embodiments, the ratio of the first flexural modulus to the second flexural modulus (first flexural modulus / second flexural modulus) may range from 25 to 100. In certain embodiments, the ratio of the first flexural modulus to the second flexural modulus (the first flexural modulus / the second flexural modulus) may range from 95 to 250. In some embodiments, the inner core layer 110 can have a third flexural modulus. In some embodiments, the first The ratio of the flexural modulus to the third flexural modulus (the first flexural modulus / the third flexural modulus) may range from 5 to 10. The outer cover 140 having a lower flexural modulus than the inner cover layer 130 and/or the inner core layer 110 provides good sensing of the golf ball 100 in shorts and putts.

In some embodiments, the inner cover layer 130 and/or the outer cover layer 140 may be composed of a thermoplastic material, and the thermoplastic material includes an ionic polymer resin, a high-neutralized acidic polymer composition, and a polyfluorene. An amine resin, a polyester resin, and a polyurethane resin. In some embodiments, inner cover layer 130 can comprise the same type of material as outer cover layer 140. In some embodiments, inner cover layer 130 can comprise a different type of material than outer cover layer 140.

Table 10 provides an example of materials used to fabricate the inner cover layer 130 in accordance with the exemplary embodiment. The amounts of materials listed in Table 9 are expressed in parts by weight (pbw) or weight percent. Neothane 6303D is the trade name for thermoplastic urethane resins manufactured by Dongsung Hichem.

Table 11 provides an example of materials used to make the cover layer 140 in accordance with the exemplary embodiment. The amounts of materials listed in Table 11 are expressed in parts by weight (pbw) or weight percent as indicated. "PTMEG" is a polytetramethylene ether glycol having an average molecular weight of 2,000 and is commercially available from Invista under the trade name Terathane® 2000. "BG" is available from BASF and He supplied 1,4-butanediol from the supplier. "TMPME" is a trimethylolpropane monoallyl ether available from Perstorp Specialty Chemicals AB. "DCP" is dicumyl peroxide available from LaPorte Chemicals. "MDI" is a diphenylmethane diisocyanate available from Huntsman under the tradename Suprasec® 1100. The outer cover material D can be formed by mixing PTMEG, BG, TMPME, DCP, and MDI in the ratios shown in Table 11. In detail, these materials can be prepared by mixing the components at a temperature of about 70 ° C for 1 hour with high agitation, followed by a 10 hour post-cure procedure at a temperature of about 100 ° C. The post-cured polyurethane elastomer can be ground into small pieces.

In certain embodiments, golf ball 100 can have a moment of inertia between about 80 g/cm ³ and about 90 g/cm ³ . This moment of inertia produces a desired distance and trajectory, particularly when the golf ball 100 is struck by a kick-off wood or against the wind.

In certain embodiments, the golf ball 100 can include a ball compression deformation of 2.2 mm to 4 mm. In certain embodiments, the golf ball 100 can have a ball compression set of 2.5 mm to 3.5 mm. In some embodiments, high The ball 100 can have a ball compression deformation of 2.5 mm to 3 mm.

In certain embodiments, the inner cover layer 130 or the outer cover layer 140 may have a specific gravity ranging from about 1.1 g/cm ³ to about 1.45 g/cm ³ . In certain embodiments, the inner cover layer 130 or the outer cover layer 140 may have a specific gravity ranging from about 1.1 g/cm ³ to about 1.35 g/cm ³ . In some embodiments, the layers used to make the golf ball 100 can have a particular relationship with respect to their respective physical properties. For example, to have a greater moment of inertia, the golf ball layers have a specific gravity gradient that is increased from the inner core layer 110 to the outer cover layer 140. In some embodiments, the inner core layer 110 may have a first specific gravity, and the outer core layer 120 may have a second specific gravity greater than the first ratio by at least 0.01, and the inner cover layer 130 may have a ratio The second ratio is at least a third proportion of the weight. In some embodiments, the specific gravity of each layer of the golf ball 100 may have the following mathematical relationship: the inner core layer 110 may have a specific gravity SG1; the outer core layer 120 may have a specific gravity SG2; the inner cover layer 130 may have an SG3; And the outer cover 140 may have a specific gravity SG4, where SG3>SG4>SG2>SG1.

In some embodiments, the golf ball 100 can have from 300 to 400 dimples on the outer surface of the outer cover 140. In some embodiments, the golf ball 100 can have from 310 to 390 dimples on the outer surface of the outer cover 140. In some embodiments, the golf ball 100 can have 320 to 380 dimples on the outer surface of the outer cover 140. When the total number of such pits is less than 300, the resulting golf ball can produce a blown-up trajectory that reduces the flight distance. On the other hand, when the total number of the pits is greater than 400, the obtained golf ball is liable to fall, which reduces the flight distance.

Although various embodiments of the invention have been described, the It is to be understood that the invention is intended to be illustrative and not restrictive Therefore, the invention is not limited except in the scope of the appended claims and their equivalents. In addition, various modifications and changes can be made within the scope of the appended claims.

100‧‧‧ Golf

142‧‧‧Amateur golfer

144‧‧‧Kicking wood

146‧‧‧ tee

148‧‧‧ teeing ground

150‧‧‧track

180‧‧‧track

182‧‧‧ Golf

Claims (20)

A golf ball comprising: an inner core layer; an outer core layer surrounding the inner core layer; an inner cover layer surrounding the outer core layer; and an outer cover layer surrounding the inner cover layer Wherein the inner core layer has a higher elastic recovery coefficient than the outer core layer, the inner cover layer and the outer cover layer; wherein performing a 125 mph head speed test on the golf ball causes the golf ball to have a The range is from an initial speed of about 173 mph to about 174 mph; and wherein an 80 mph head speed test is performed on the golf ball, the golf ball is caused to have an initial speed ranging from about 87 mph to about 90 mph. A golf ball according to claim 1, wherein a 95 mph head speed test of the golf ball results in the golf ball having an initial speed ranging from about 115 mph to about 117 mph. A golf ball according to claim 1, wherein the golf ball is subjected to a 110 mph head speed test which results in the golf ball having an initial speed ranging from about 158 mph to about 160 mph. A golf ball according to claim 1, wherein the inner core layer comprises a first high school and an acidic polymer composition. The golf ball of claim 4, wherein the first high-grade and acidic polymer composition comprises HPF 2000 and HPF AD 1035 One of them. For example, the golf ball of claim 5, wherein. The inner core layer comprises a second high neutralizing acidic polymer composition. A golf ball according to claim 1, wherein the inner core layer has an elastic recovery coefficient value ranging from about 0.795 to about 0.81. The golf ball of claim 1, wherein the inner core layer has an elastic recovery coefficient value that is greater than the elastic recovery coefficient value of the golf ball by about 0.005 to about 0.02. The golf ball of claim 1, wherein the inner cover has a Shore D hardness ranging from about 45 to about 55. A golf ball comprising: an inner core layer; an outer core layer surrounding the inner core layer; an inner cover layer surrounding the outer core layer; and an outer cover layer surrounding the inner cover layer Performing a 125 mph head speed test on the golf ball, causing the golf ball to have a first initial speed; wherein performing an 80 mph head speed test on the golf ball causes the golf ball to have a second initial speed; Wherein the first initial speed is about 85 mph to about 87 mph higher than the second initial speed. A golf ball according to claim 10, wherein the 110 mph head speed test is performed on the golf ball, causing the golf ball to have a third initial speed, and the third initial speed is higher than the second initial speed About 85 mph to about 87 mph. A golf ball according to claim 10, wherein performing a 95 mph head speed test on the golf ball causes the golf ball to have a third initial speed, and the third initial speed is about 27 mph higher than the second initial speed Up to about 29mph. A golf ball according to claim 10, wherein the inner core layer comprises a first high-grade and acidic polymer composition. The golf ball of claim 13, wherein the first high-grade and acidic polymer composition comprises one of HPF 2000 and HPF AD 1035. The golf ball of claim 10, wherein the inner core layer comprises a first high-medium and acidic polymer composition and a second high-neutralized acidic polymer composition, and the first high neutralizing acidity The ratio of the polymer composition to the second high neutralized acidic polymer composition ranges from about 20:80 to about 80:20. A golf ball according to claim 10, wherein the inner core layer has an elastic recovery coefficient value that is greater than the elastic recovery coefficient value of the golf ball by about 0.005 to about 0.02. A golf ball comprising: an inner core layer comprising at least one first high-neutralized acidic polymer composition; an outer core layer surrounding the inner core layer; and an inner cover layer surrounding the outer layer a core layer; an outer cover layer surrounding the inner cover layer; Performing a 125 mph head speed test on the golf ball would cause the golf ball to have an initial speed ranging from about 173 mph to about 174 mph; and wherein performing a 95 mph head speed test on the golf ball would result in the golf ball having a The range is from an initial speed of about 115 mph to about 117 mph. The golf ball of claim 17, wherein the inner core layer comprises at least two first high-grade and acidic polymer compositions. A golf ball according to claim 17, wherein the inner core layer has an elastic recovery coefficient value that is greater than the elastic recovery coefficient value of the golf ball by about 0.005 to about 0.02. A golf ball according to claim 17 wherein the golf ball is subjected to a 110 mph head speed test which results in the golf ball having an initial speed ranging from about 158 mph to about 160 mph.