CN102166405A

CN102166405A - Multilayer solid golf ball

Info

Publication number: CN102166405A
Application number: CN2011100399198A
Authority: CN
Inventors: 石井秀幸; 壁下裕; 市川八州史; 成昕; 周建新; 刘振泰
Original assignee: Nike International Ltd
Current assignee: Nike International Ltd
Priority date: 2010-02-19
Filing date: 2011-02-17
Publication date: 2011-08-31
Also published as: AU2011100184B4; JP2011167517A; TWI490014B; AU2011100184A4; KR101129150B1; EP2361657B1; CA2730693C; TW201129406A; CA2730693A1; CN104368132A; KR20110095828A; CN202199049U; EP2361657A1; US20110053707A1

Abstract

A multilayer solid golf ball maintains performance characteristics after exposure to high ambient temperatures. A core includes a thermoplastic material. The core is surrounded by an intermediate layer comprising a peroxide cross-linked polybutadiene. A single layer or double layer cover with dimples is also provided.

Description

The multilayer solid golf ball

The cross reference of related application

According to the 35th in U.S.C. (United States code) the 119th (e) chapter, it is 61/153 that the application requires application number, 952, to be called " multilayer solid golf ball (Multilayer Solid GolfBall) ", the applying date be the priority of the U.S. Provisional Patent Application on February 19th, 2009 to name, this application by with reference to the mode of quoting in conjunction with so far.

Technical field

Present invention relates in general to golf, more specifically, relate to and have the ball core and be exposed to the multilayer solid golf ball that still keeps the self performance feature after the high temperature.

Background technology

The history of golf development is very long, from wound form (wound) golf to solid two-piece type (two piece) golf and multi-layer golf ball.Rotate the performance advantage of the longer distance of advancing owing to quality of stability with such as reducing the club batting, the ball core has replaced wound form ball core gradually.

Have the thermoplastic of comprising, ionomer (ionomer) material for example, a plurality of layers multi-layer golf ball brought golf technology into new level.Typically, a plurality of thin layers of being made by the different materials that merges have increased extra feature, the rotation when leaving ball seat as reduction but rotation when being increased on the meadow.For example, the one deck in a plurality of layers can be the hard ionomer with cover sheet form, and the mollielast material forms that one deck as extexine.Typically use the thin layer of ionomer layer, this is because ionomer has relatively low elasticity, when especially comparing with a plurality of layers the rubber phase that typically is used to form ball core or ball core.

Yet, Zhong He ionomer highly, as those by

The ionomer of the height neutralization of research and development is compared with the elasticity of elastomeric material and to be had suitable or even better elasticity.These ionomers that highly neutralize can be represented the next stage of golf ball core innovation.The golf ball core that comprises thermoplastic is more stable than thermosetting ball core qualitatively.Use thermoplastic resin, as the ionomer that highly neutralizes, a restriction that is used for golf ball core is that environment temperature is to the shape and the Effect on Performance of golf ball core.

Flying distance is to estimate an important indicator of golf performance.Flying distance is influenced by three principal elements: " initial velocity ", " rotary speed (spin rate) " and " service angle (1aunch angle) ".Initial velocity is one of Main physical characteristic that influences the golf ball flight distance.(coefficient of restitution COR) be the alternative parameter of golf initial velocity, and temperature can influence COR to recovery coefficient.COR is normally defined object before bump and the ratio of speed afterwards.COR be 1 o'clock be perfect elastic collision, wherein do not have energy to lose because of collision; COR be 0 o'clock be perfect inelastic collision, wherein all energy dissipate in collision.(the UnitedStates Golf Association of United States Golf Association, USGA) be set at the normal temperature that is used to measure golf physical characteristic and performance characteristic with 24 degrees centigrade, in order to observe regulation and the regulations of USGA, with 24 degrees centigrade as normal temperature, when temperature is below or above 24 degrees centigrade, the physical characteristic of golf comprises COR, will be affected.For example, COR and environment temperature are positive relationship significantly, so golf flies shortlyer in cold snap usually.

Similar, performance is subjected to the influence of long term exposure in high temperature.Because many linksmans' custom, the frequent long term exposure of golf possibility is in high temperature.For example, many linksmans tend to be placed on golf in their golf bag and be placed in their automobile trunk.The linksman may live in such zone, promptly day temperature in addition night temperature often surpass 30 degrees centigrade, especially when the daytime in summer.In automobile trunk, temperature may reach 50 degrees centigrade for more time.

When being exposed to higher relatively environment temperature for more time, golf tends to lose their original performance characteristic.The material on ball core or top layer (cover layers) may twist or lose their shape, especially when temperature circulation time between higher relatively environment temperature and relatively low environment temperature, changes in one day process as environment temperature.This causes the loss of the distance and the feel of the ball.

Therefore, even need a kind of golf that higher relatively environment temperature also can be kept its performance characteristic afterwards that is exposed in this area.

Summary of the invention

On the one hand, the invention provides a kind of golf, comprise: the ball core, described ball core comprises thermoplastic; Wrap up the intermediate layer of described ball core formation endosphere, described intermediate layer comprises thermosets; And the top layer (cover) of wrapping up described endosphere, wherein said golf satisfies following requirement: when (1) remains in 24 degrees centigrade the environment at least about 8 hours when described endosphere, under the load of 10-130kg, described endosphere has first departure (deflection amount) of 2.2-3.2mm, (2) when described endosphere is maintained at about in 50 degrees centigrade the environment at least about 8 hours, under the load of 10-130kg, described endosphere has second departure, wherein the ratio of second departure and first departure is between about 1.05 and about 1.15, and (3) are when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and is higher than the recovery coefficient of described golf.

On the other hand, the invention provides a kind of golf, comprise: the ball core, described ball core comprises thermoplastic; Wrap up the intermediate layer of described ball core formation endosphere, described intermediate layer comprises thermosets; And wrap up described endosphere and on self outer surface, have the top layer of a plurality of pits, wherein said golf satisfies following requirement: when (1) remains in 24 degrees centigrade the environment at least about 8 hours when described endosphere, under the load of 10-130kg, described endosphere has first departure of 2.2-3.2mm, (2) when described endosphere remains in 50 degrees centigrade the environment at least about 8 hours, under the load of 10-130kg, described endosphere has second departure, the ratio of second departure and first departure is between about 1.05 and about 1.15, (3) when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and be higher than the recovery coefficient of described golf, and (4) described pit has 550mm ³-800mm ³Cumulative volume.

By following accompanying drawing and detailed explanation, to those skilled in the art, other system, method, the feature and advantage of the present invention can be or can become apparent.This specification attempts to comprise within the scope of the present invention the other system of all that, method, feature and advantage, and makes it be subjected to the protection of claim.

Description of drawings

With reference to following accompanying drawing and explanation, the present invention may be better understood.Parts in the accompanying drawing are not necessarily drawn in proportion, but emphasis is used to illustrate principle of the present invention.And in different views, identical Reference numeral indicates corresponding part.

Fig. 1 is the perspective view of golf;

Fig. 2 is the sectional view of first embodiment of golf shown in Figure 1; And

Fig. 3 is the sectional view of second embodiment of golf shown in Figure 1.

The specific embodiment

Fig. 1 represents the perspective view according to solid golf ball 100 of the present invention.Golf 100 is spherical generally, has a plurality of pits 102 on the surface of golf 100.The pit 102 of any amount can be provided on the surface of golf 100.In certain embodiments, the quantity of pit 102 can be about 250 to about 500 scope.In certain embodiments, the quantity of pit 102 can be about 300 to about 400 scope.Pit 102 can be arranged on the surface of golf 100 with any style.

Although be expressed as substantial hemispherically among the figure, pit 102 can also have arbitrary shape commonly known in the art, as oval, polygon or the like.Although in certain embodiments, pit 102 can be the projection that extends out from golf 100 surfaces, however pit 102 recessed (indentations) in golf 100 surfaces typically.Volume of each recessed qualification.For example, if pit is hemispherical recessed in the surface, the space that is then carved by pit and the illusion line of the surperficial position of golf 100 is defined when being existed by the no pit of expression has hemispheroidal volume, perhaps is 2/3 π r ³, wherein r is hemispheroidal radius.In certain embodiments, all pits 102 can have identical diameter or radius.In other embodiments, pit 102 can have different diameters or radius.In certain embodiments, each pit can have diameter or the radius of selecting from the group of previously selected diameter/radius.In certain embodiments, the quantity of different-diameter/radius can be in 3 to 6 scope in the group of previously selected diameter/radius.In certain embodiments, has the quantity of pit 102 of maximum gauge/radius greater than the quantity of pit with any other radius/diameter.In other words, in such embodiments, maximum pit is more than the pit of any other size.

The summation of the volume of all pits 102 is total pit volumes on the surface of golf 100.In one embodiment, total pit volume is about 550mm ³-Yue 800mm ³In certain embodiments, total pit volume can be at about 600mm ³To about 800mm ³Scope in.

In inside, golf 100 is configured to the multilayer solid golf ball generally.In other words, multilayer material is merged or formation ball compressed together.As shown in Figure 2, golf 100 embodiment comprise ball core 104, top layer 108 and be clipped in ball core 104 and top layer 108 between intermediate layer 106.Ball core 104 and intermediate layer 106 can be considered to " endosphere " together.

Ball core 104 can comprise the material of any amount.In certain embodiments, ball core 104 can comprise thermoplastic or thermosets.The thermoplastic of ball core 104 can be acid polymer composition, polyamide, mylar, polyurethane resin and their combination of ionomer resin, highly neutralization.In one embodiment, ball core 104 comprises ionomer resin.For example, ball core 104 can comprise HPF and

(all can buy) from E.I.Du Pont Company (E.I.Dupont de Nemours andCompany), and

(can buy) from Exxon Corporation (Exxon Corporation).In order to increase COR, a kind of composition of ball core 104 comprises HPF as major constituent,

And/or As optional sub-component.Major constituent in ball core 104 is 100 weight portions, and the amount of any sub-component of ball core 104 can be the 0-40 weight portion, perhaps in certain embodiments, is the 0-10 weight portion.

Ball core 104 can use in this area any known method to make, as hot-forming or injection moulding.Ball core 104 of the present invention can be the single or multiple lift structure, except above-mentioned material, can also use any other material to make ball core 104.In certain embodiments, select ball core 104 material so that the COR of ball core 104 greater than 0.750.In certain embodiments, when 40m/s, the COR of ball core 104 is in about 0.79 and 0.89 scope.In certain embodiments, the COR of ball core 104 is higher than the COR of golf 100 as a whole the time.

In certain embodiments, the diameter of ball core 104 can be at about 19.0mm to the scope of about 37.0mm.In certain embodiments, the diameter of ball core 104 can be at about 19.0mm to the scope of about 32mm.In certain embodiments, the diameter of ball core 104 can be at about 21.0mm to the scope of about 35.0mm.In certain embodiments, the diameter of ball core 104 can be in the scope of about 23.0mm to 32.0mm.

In the embodiment shown in Figure 2, intermediate layer 106 covers and wraps up in fact ball core 104.Intermediate layer 106 has the inner surface towards the outer surface of ball core 104.In the embodiment shown in Figure 2, the outer surface in intermediate layer 106 towards the top layer 108 inner surface.Intermediate layer 106 can have any thickness.In one embodiment, the thickness in intermediate layer 106 can be at about 3mm to the scope of about 11mm.In one embodiment, the thickness in intermediate layer 106 can be at about 4mm to the scope of about 10mm.

Intermediate layer 106 can comprise thermosets.In certain embodiments, thermosets can be a rubber composition.In certain embodiments, the basic rubber of rubber composition can comprise 1,4-is suitable-polybutadiene (1,4-cis-polybutadiene), polyisoprene, SB, natural rubber and their composition.In order to increase the elasticity of endosphere, 1,4-is suitable-and polybutadiene can be as the basic rubber of rubber composition.Alternatively, 1,4-is suitable-and polybutadiene can be added into additional materials in this basic material as the basic material in intermediate layer 106.In certain embodiments, be 100 weight portions in rubber composition, 1,4-is suitable-and the amount of polybutadiene is 50 weight portions at least.

Additive as crosslinking agent and the filler with larger specific gravity, can be added in the rubber composition.Suitable crosslinking agent can be selected from the group of being made up of peroxide, dizinc acrylate resin (zinc diacrylate), acrylic acid magnesium, zinc methacrylate and magnesinm methacrylate.In order to increase the elasticity of rubber composition, can use zinc acrylate resin.Yet,, can use peroxide as crosslinking agent in order to increase to the resistance of long term exposure in higher relatively environment temperature.Particularly, when ball core 104 was made by the high-elasticity thermoplastic material, when intermediate layer 106 was made by the polybutadiene material of peroxide crosslinking, no matter whether long term exposure its performance in higher relatively environment temperature can both be maintained golf 100.

For example, made by the polybutadiene material of peroxide crosslinking and ball core 104 can comprise the high-elasticity thermoplastic material time when intermediate layer 106, golf 100 can leave under 24 degrees centigrade at least about 8 hours.When golf 100 left in about 24 degrees centigrade environment at least about 8 hours, under the load of the about 130kg of about 10kg-, endosphere (ball core 104 and intermediate layer 106) can have first departure of the about 3.2mm of 2.2mm-.When same ball left in about 50 degrees centigrade environment at least about 8 hours, golf 100 can have different deviations, i.e. second departure.The ratio of second departure and first departure is between about 1.5-about 1.15.

In table 1, provide multiple COR and deviation to measure to multiple golf.The example ball is constructed in accordance.In the example ball, ball core 104 comprises HPF2000, Du Pont's ionomer resin that a kind of methacrylic acid (MAA) acidic group has been neutralized fully by magnesium ion.Intermediate layer 106 comprises the BR compound, a kind of polybutadiene material of peroxide crosslinking, and its concrete component is illustrated in the table 2.The performance of example ball and two traditional balls compare: compare ball 1, its whole endosphere comprises HPF2000; Compare ball 2, its whole endosphere comprises Surlyn8940, and (wherein the MAA acidic group is partly neutralized by sodium ion for Ethylene/methacrylic acid, E/MAA) copolymer in a kind of Du Pont ionomer resin-ethylene/methacrylic acid acid.

Table 1: the performance of example ball and the comparison of traditional ball

Table 2:BR compound component

TAIPOL ^TM?BR0150?100

Dizinc acrylate resin 28

Zinc oxide 6

Barium sulfate 39.5

Peroxide 1

As shown in table 1, after being exposed to high ambient temperature, the deviation performance of example ball is better than comparison ball 1 and compares the performance of ball 2.Second departure of example ball is about 1.1 with the ratio of first departure, and the ratio of other balls is respectively 1.23 and 1.44.This means that after being exposed to high temperature for a long time relatively ball is than their shape of the more difficult maintenance of example ball and opposing compression.And the COR of example ball is higher than each relatively ball.

In order to increase the proportion in intermediate layer 106, suitable filler can be added in the rubber composition, as zinc oxide, barium sulfate, calcium carbonate and magnesium carbonate, in the present invention, preferred zinc oxide.In addition, the metal dust with larger specific gravity also can be used as filler, as tungsten.By adjusting the amount of the filler that adds, the proportion in intermediate layer 106 can reach the level of expectation.

In the embodiment shown in Figure 2, the outer surface in intermediate layer 106 towards the top layer 108 inner surface.The outer surface on top layer 108 is outer surfaces of golf 100, and it is illustrated among Fig. 1.Top layer 108 can comprise any material known in this area.In certain embodiments, top layer 108 can comprise ionomer resin, polyamide, mylar, TPU, the thermosetting polyurethane resin of ionomer resin, highly neutralization, perhaps these combination of compounds.

In the embodiment shown in fig. 3, provide additional top layer: endosexine 110.In such embodiments, can think that top layer 108 is extexines.Endosexine 110 can comprise and extexine 108 identical materials.

The thickness of endosexine 110 can be in the scope of about 0.5mm to 11.0mm.In certain embodiments, the thickness of endosexine 110 can be at about 0.5mm to the scope of about 8.5mm.In certain embodiments, the thickness of endosexine 110 can be at about 0.5mm to the scope of about 3.0mm.

Endosexine 110 has towards the intermediate layer inner surface of 106 outer surface.Endosexine 110 covers and parcel intermediate layer 106.Endosexine 110 has the outer surface of the inner surface on top layer 108 outward.

In certain embodiments, the outer surface of endosexine 110 has higher hardness than the outer surface on top layer 108.In certain embodiments, the outer surface of endosexine 110 can have the Shao Shi D hardness (Shore D hardness) of 45-65, and the outer surface of extexine 108 can have the Shao Shi D hardness of 40-60.In certain embodiments, the integral body of endosexine 110 has higher hardness than the integral body on top layer 108.

Although selectable component of ball described herein and layer are exposed to performance after the high ambient temperature in order to improve ball, ball can also be designed to improve or remain on the performance in the other types environment.For example, the golf of some types can have the performance of reduction when cold.This problem is 12/230 at application number, 272, name is called in the U.S. Patent application that " multilayer solid golf ball (Multilayer Solid GolfBall) ", the applying date are on August 27th, 2008 and solves, the full content of this patent application by with reference to the mode of quoting in conjunction with so far.

Although described various embodiment of the present invention, but specification is intended to as example, rather than restriction, and for this area those skilled in the art, it is evident that in the scope of the invention to have more embodiment and embodiment.Therefore, the present invention is only limited by the claims.In addition, in the claim scope, can make various changes and conversion.

Claims

1. a golf is characterized in that, comprises:

The ball core, described ball core comprises thermoplastic;

Wrap up the intermediate layer of described ball core formation endosphere, described intermediate layer comprises thermosets; And

Wrap up the top layer of described endosphere, wherein said golf satisfies following requirement:

(1) when described endosphere remained in 24 degrees centigrade the environment at least about 8 hours, under the load of 10-130kg, described endosphere had first departure of 2.2-3.2mm,

(2) when described endosphere was maintained at about in 50 degrees centigrade the environment at least about 8 hours, under the load of 10-130kg, described endosphere had second departure, wherein the ratio of second departure and first departure between about 1.05 and about 1.15, and

(3) when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and is higher than the recovery coefficient of described golf.

2. golf according to claim 1 is characterized in that, the diameter of described ball core is 19mm-32mm.

3. golf according to claim 1 is characterized in that, the thickness in described intermediate layer is 3mm-11mm.

4. golf according to claim 1 is characterized in that, the thickness in described intermediate layer is 4mm-10mm.

5. golf according to claim 1 is characterized in that, described thermoplastic be selected from by ionomer resin, senior middle school and the group formed of acid polymer composition, polyamide, mylar, polyurethane resin and their any combination.

6. golf according to claim 1 is characterized in that, described top layer comprises endosexine of wrapping up described endosphere and the extexine that wraps up described endosexine; The Shao Shi D hardness of described extexine is less than the Shao Shi D hardness of endosexine.

7. golf according to claim 6 is characterized in that, it is the outer surface of 45-65 that described endosexine comprises Shao Shi D hardness; Described extexine comprise Shao Shi D hardness be 40-60 appearance to.

8. a golf is characterized in that, comprises:

The ball core, described ball core comprises thermoplastic;

Wrap up described endosphere and have the top layer of a plurality of pits on self outer surface, wherein said golf satisfies following requirement:

(2) when described endosphere remained in 50 degrees centigrade the environment at least about 8 hours, under the load of 10-130kg, described endosphere had second departure, the ratio of second departure and first departure between about 1.05 and about 1.15, and

(3) when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and is higher than the recovery coefficient of described golf, and

(4) cumulative volume of described pit is 550mm ³-800mm ³

9. golf according to claim 8 is characterized in that, described pit add up to 250-500.

10. golf according to claim 8 is characterized in that, described pit add up to 300-450.

11. golf according to claim 8 is characterized in that, the cumulative volume of described pit is 600mm ³-800mm ³

12. golf according to claim 8 is characterized in that, described pit has the different diameter of 3-6 kind.

13. golf according to claim 12 is characterized in that, the quantity of pit with maximum gauge is greater than the quantity that respectively has than any other pits of minor diameter.

14. golf according to claim 8 is characterized in that, the diameter of described ball core is 19mm-32mm.

15. golf according to claim 8 is characterized in that, the thickness in described intermediate layer is 3mm-11mm.

16. golf according to claim 8 is characterized in that, the thickness in described intermediate layer is 4mm-10mm.

17. golf according to claim 8, it is characterized in that described thermoplastic is selected from the group of being made up of acid polymer composition, polyamide, mylar, polyurethane resin and their any combination of ionomer resin, highly neutralization.

18. golf according to claim 8 is characterized in that, described top layer comprises endosexine of wrapping up described endosphere and the extexine that wraps up described endosexine; The Shao Shi D hardness of described extexine is less than the Shao Shi D hardness of endosexine.

19. golf according to claim 18, it is characterized in that, described endosexine or extexine comprise acid polymer composition, polyamide, mylar, the TPU that is selected from by ionomer resin, highly neutralization, the material of the group that thermosetting polyurethane resin and their any combination are formed.

20. golf according to claim 18 is characterized in that, it is the outer surface of 45-65 that described endosexine comprises Shao Shi D hardness; It is the outer surface of 40-60 that described extexine comprises Shao Shi D hardness.