CN104368132A

CN104368132A - Multilayer solid golf ball

Info

Publication number: CN104368132A
Application number: CN201410505386.1A
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 Innovation LP
Priority date: 2010-02-19
Filing date: 2011-02-17
Publication date: 2015-02-25
Also published as: US20110053707A1; EP2361657A1; EP2361657B1; KR101129150B1; CA2730693C; TWI490014B; AU2011100184A4; AU2011100184B4; TW201129406A; CN102166405A; CN202199049U; CA2730693A1; JP2011167517A; KR20110095828A

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

Multilayer solid golf ball

The application is the applying date is on February 17th, 2011, and application number is 201110039919.8, and denomination of invention is the divisional application of the application of " multilayer solid golf ball ".

The cross reference of related application

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

Technical field

Present invention relates in general to golf, more specifically, relate to and there is ball core and the multilayer solid golf ball still keeping self performance feature after being exposed to 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.Because the stability of quality and such as minimizing club batting rotate and the performance advantage of longer distance of advancing, ball core instead of wound form ball core gradually.

Have and comprise thermoplastic, such as ionomer (ionomer) material, the multi-layer golf ball of multiple layers brought golf technique into new level.Typically, the multiple thin layers be made up of the different materials merging add extra feature, the rotation as the rotation that reduces when leaving ball seat but when being increased on meadow.Such as, the one deck in multiple layer can be the hard ionomer with cover sheet form, and soft elastomer material forms that one deck being used as extexine.Typically use the thin layer of ionomer layer, this is because ionomer has relatively low elasticity, especially with typically for the formation of ball core or ball core the rubber of multiple layers compared with time.

But, highly neutralization ionomer, as those by the ionomer of the height neutralization of research and development, has suitable or even better elasticity compared with the elasticity of elastomeric material.These ionomers highly neutralized can represent the next stage of golf ball core innovation.Comprise the golf ball core of thermoplastic more stable than thermosetting ball core qualitatively.Use thermoplastic resin, as the ionomer of highly neutralization, a restriction for golf ball core is, the shape of environment temperature on golf ball core and the impact of performance.

Flying distance evaluates an important indicator of golf performance.Flying distance affects by three principal elements: " initial velocity ", " rotary speed (spin rate) " and " ball launch angle (1aunch angle) ".Initial velocity is one of Main Physical Characteristics affecting golf ball flight distance.Recovery coefficient (coefficient of restitution, COR) is the alternative parameter of golf initial velocity, and temperature can affect COR.COR is normally defined the ratio of object before impact and afterwards speed.COR is perfect elastic collision when being 1, does not wherein have energy to lose because of collision; COR is perfect inelastic collision when being 0, and wherein all energy dissipate in an impact.United States Golf Association (United StatesGolf Association, USGA) 24 degrees Celsius are set as the normal temperature for measuring golf physical characteristic and performance characteristic, in order to observe regulation and the regulations of USGA, using 24 degrees Celsius as normal temperature, when temperature is below or above 24 degrees Celsius, the physical characteristic of golf, comprises COR, will be affected.Such as, COR and environment temperature are positive relationship significantly, so golf usually flies shorter in cold snap.

Similar, performance is by the impact being exposed to high temperature for a long time.Due to the custom of many linksmans, golf often may be exposed to high temperature for a long time.Such as, many linksmans to tend to golf to be placed in their golf bag and are placed in their automobile trunk.Linksman may live in such region, and namely day temperature, even night temperatures often exceed 30 degrees Celsius, especially when the daytime in summer.In automobile trunk, temperature may for longer periods reach 50 degrees Celsius.

When being for longer periods exposed to relatively high environment temperature, golf tends to lose their original performance characteristic.The material of ball core or top layer (cover layers) may distortion or lose their shape, especially when temperature circulation time between relatively high environment temperature and relatively low environment temperature, as environment temperature changes in the process of a day.This causes the loss of the Distance geometry feel of the ball.

Therefore, though need in this area a kind of be exposed to relatively high environment temperature after also can maintain the golf of its performance characteristic.

Summary of the invention

On the one hand, the invention provides a kind of golf, comprise: ball core, described ball core comprises thermoplastic, wrap up the intermediate layer that described ball core forms interior ball, described intermediate layer comprises thermosets, and wrap up the top layer (cover) of described interior ball, wherein said golf meets following requirements: (1) remains in the environment of 24 degrees Celsius constantly little at least about 8 when described interior ball, under the load of 10-130kg, described interior ball has first departure (deflection amount) of 2.2-3.2mm, (2) when described interior ball is maintained at about in the environment of 50 degrees Celsius constantly little at least about 8, under the load of 10-130kg, described interior ball has the second departure, wherein the ratio of the second departure and the first departure is between about 1.05 with about between 1.15, and (3) are when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and higher than the recovery coefficient of described golf.

The diameter of described ball core can be 19mm-32mm.

The thickness in described intermediate layer can be 3mm-11mm.

The thickness in described intermediate layer can be 4mm-10mm.

Described thermoplastic can be selected from by ionomer resin, senior middle school and the group that forms of acid polymer composition, polyamide, mylar, polyurethane resin and their any combination.

Described top layer can comprise the extexine of endosexine and the described endosexine of parcel of wrapping up described interior ball; The shore D hardness of described extexine can be less than the shore D hardness of endosexine.

Described endosexine can comprise the outer surface that shore D hardness is 45-65; Described extexine can comprise shore D hardness be 40-60 appearance to.

On the other hand, the invention provides a kind of golf, comprise: ball core, described ball core comprises thermoplastic, wrap up the intermediate layer that described ball core forms interior ball, described intermediate layer comprises thermosets, and wrap up described interior ball and there is the top layer of multiple pit on self outer surface, wherein said golf meets following requirements: (1) remains in the environment of 24 degrees Celsius constantly little at least about 8 when described interior ball, under the load of 10-130kg, described interior ball has first departure of 2.2-3.2mm, (2) when described interior ball remains in the environment of 50 degrees Celsius constantly little at least about 8, under the load of 10-130kg, described interior ball has the second departure, the ratio of the second departure and the first departure is between about 1.05 with about between 1.15, (3) when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and higher than the recovery coefficient of described golf, and (4) described pit has 550mm ³-800mm ³cumulative volume.

The sum of described pit can be 250-500.

The sum of described pit can be 300-450.

The cumulative volume of described pit can be 600mm ³-800mm ³.

Described pit can have the diameter that 3-6 kind is different.

The quantity with the pit of maximum gauge can be greater than the quantity of other pits any respectively with small diameter.

The diameter of described ball core can be 19mm-32mm.

The thickness in described intermediate layer can be 3mm-11mm.

The thickness in described intermediate layer can be 4mm-10mm.

Described thermoplastic can be selected from the group be made up of the acid polymer composition of ionomer resin, highly neutralization, polyamide, mylar, polyurethane resin and their any combination.

Described endosexine or extexine can comprise the acid polymer composition, polyamide, mylar, the TPU that are selected from by ionomer resin, highly neutralization, the material of the group of thermosetting polyurethane resin and their any combination composition.

Described endosexine can comprise the outer surface that shore D hardness is 45-65; Described extexine can comprise the outer surface that shore D hardness is 40-60.

By accompanying drawing below and detailed description, to those skilled in the art, the system that the present invention is other, method, feature and advantage can be or can become apparent.This description is attempted to comprise the other system of all that, method, feature and advantage within the scope of the present invention, and makes it be subject to the protection of claim.

Accompanying drawing explanation

With reference to accompanying drawing below and explanation, the present invention may be better understood.Parts in accompanying drawing are not necessarily drawn in proportion, but emphasis is for illustration of 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 the first embodiment of golf shown in Fig. 1; And

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

Detailed description of the invention

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

Although be expressed as substantial hemispherical in figure, pit 102 can also have arbitrary shape commonly known in the art, as ellipse, polygon etc.Although in certain embodiments, pit 102 can be the projection extended out from golf 100 surface, but recessed (indentations) of pit 102 typically in golf 100 surface.Each recessed restriction volume.Such as, if pit is hemispherical recessed in surface, then by pit carve and by indicate exist without pit time golf 100 the space defined of the illusion line of surperficial position there is hemispheroidal volume, or be 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 the diameter or radius selected from the group of previously selected diameter/radius.In certain embodiments, in the group of previously selected diameter/radius, the quantity of different-diameter/radius can in the scope of 3 to 6.In certain embodiments, the quantity with the pit 102 of maximum gauge/radius is greater than the quantity of the pit with any other radius/diameter.In other words, in such embodiments, maximum pit is more than the pit of any other size.

On the surface of golf 100, the summation of the volume of all pits 102 is total depression volume.In one embodiment, total depression volume is about 550mm ³-Yue 800mm ³.In certain embodiments, total depression volume can at about 600mm ³to about 800mm ³scope in.

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

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 ionomer resin, the acid polymer composition highly neutralized, polyamide, mylar, polyurethane resin and their combination.In one embodiment, ball core 104 comprises ionomer resin.Such as, 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 divide as optional subgroup.Be 100 parts by weight with the major constituent of ball core 104, the amount of any subgroup of ball core 104 point can be 0-40 weight portion, or in certain embodiments, is 0-10 weight portion.

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

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

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

Intermediate layer 106 can comprise thermosets.In certain embodiments, thermosets can be rubber composition.In certain embodiments, the base rubber of rubber composition can comprise Isosorbide-5-Nitrae-cis-polybutadiene (Isosorbide-5-Nitrae-cis-polybutadiene), polyisoprene, SB, natural rubber and their composition.In order to increase the elasticity of interior ball, Isosorbide-5-Nitrae-cis-polybutadiene can be used as the base rubber of rubber composition.Alternatively, Isosorbide-5-Nitrae-cis-polybutadiene can be used as the basic material in intermediate layer 106, is added into by additional materials in this basic material.In certain embodiments, be 100 parts by weight with rubber composition, the amount of Isosorbide-5-Nitrae-cis-polybutadiene is at least 50 weight portions.

Additive, as crosslinking agent and the filler with larger specific gravity, can be added in rubber composition.Suitable crosslinking agent can be selected from the group be made up of peroxide, dizinc acrylate resin (zinc diacrylate), Magnesium Acrylate Prepared, zinc methacrylate and magnesinm methacrylate.In order to increase the elasticity of rubber composition, zinc acrylate resin can be used.But, in order to increase the resistance to being exposed to relatively high environment temperature for a long time, peroxide can be used as crosslinking agent.Particularly, when ball core 104 is made up of high-elasticity thermoplastic material, when intermediate layer 106 is made up of the polybudiene materials of peroxide crosslinking, no matter whether golf 100 be exposed to its performance in relatively high environment temperature for a long time can be maintained.

Such as, when intermediate layer 106 is made up of the polybudiene materials of peroxide crosslinking and ball core 104 can comprise high-elasticity thermoplastic material, at least about 8 hours under golf 100 can leave 24 degrees Celsius in.When golf 100 leaves in the environment of about 24 degrees Celsius constantly little at least about 8, be about the load of 130kg at about 10kg-under, interior ball (ball core 104 and intermediate layer 106) can have the first departure that 2.2mm-is about 3.2mm.When same ball leaves in the environment of about 50 degrees Celsius constantly little at least about 8, golf 100 can have different deviations, i.e. the second departure.The ratio of the second departure and the first departure is between about 1.5-about between 1.15.

In Table 1, multiple COR and deviation measurement are provided to multiple golf.Example ball is constructed in accordance.In example ball, ball core 104 comprises HPF2000, and a kind of methacrylic acid (MAA) acidic group is by Du Pont's ionomer resin that magnesium ion neutralizes completely.Intermediate layer 106 comprises BR compound, a kind of polybudiene materials of peroxide crosslinking, and its concrete component represents in table 2.The performance of example ball compares with two traditional balls: compare ball 1, and its whole interior bag draws together HPF2000; Relatively ball 2, its whole interior bag is containing Surlyn8940, and a kind of Du Pont ionomer resin-ethylene/methacrylic acid acid (Ethylene/methacrylic acid, E/MAA) copolymer, wherein MAA acidic group is neutralized by sodium ion part.

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

Table 2:BR compound component

As shown in table 1, after being exposed to high ambient temperature, the deviation performance of example ball is better than the performance comparing ball 1 and compare ball 2.Second departure of example ball is about 1.1 with the ratio of the first departure, and the ratio of other balls is 1.23 and 1.44 respectively.This means after being exposed to high temperature for a long time, compare ball and more not easily keep their shape than example ball and resist compression.And the COR of example ball compares ball higher than each.

In order to increase the proportion in intermediate layer 106, suitable filler can be added in rubber composition, as zinc oxide, barium sulfate, calcium carbonate and magnesium carbonate, in the present invention, and preferential oxidation zinc.In addition, the metal dust with larger specific gravity also can be used as filler, as tungsten.The amount of the filler added by adjustment, 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 is towards the inner surface on top layer 108.The outer surface on top layer 108 is outer surfaces of golf 100, and it represents in FIG.Top layer 108 can comprise any known material 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, or the combination of these compounds.

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

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

Endosexine 110 has the inner surface towards the outer surface in intermediate layer 106.Endosexine 110 covers and wraps up intermediate layer 106.Endosexine 110 has the outer surface of the inner surface on top layer 108 toward the outside.

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

Although the selectable component of ball described herein and layer, in order to improve the performance after ball is exposed to high ambient temperature, ball can also be designed to the performance improved or remain in other types environment.Such as, 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 " multilayer solid golf ball (Multilayer Solid GolfBall) ", the applying date is solve in the U.S. Patent application on August 27th, 2008, and the full content of this patent application combines so far by reference to the mode quoted.

Although described various different embodiment of the present invention, but description is intended to as example, instead of 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, various change and conversion can be made in right.

Claims

1. a golf, is characterized in that, comprises:

Ball core, described ball core comprises thermoplastic;

Wrap up the intermediate layer that described ball core forms interior ball, described intermediate layer comprises thermosets; And

Wrap up the top layer of described interior ball, wherein said golf meets following requirements:

(1) when described interior ball remains in the environment of 24 degrees Celsius constantly little at least about 8, under the load of 10-130kg, described interior ball has first departure of 2.2-3.2mm,

(2) when described interior ball is maintained at about in the environment of 50 degrees Celsius constantly little at least about 8, under the load of 10-130kg, described interior ball has the second departure, and wherein the ratio of the second departure and the first departure is between about 1.05 with about between 1.15, and

(3) when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and 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 that forms 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 the extexine of endosexine and the described endosexine of parcel of wrapping up described interior ball; The shore D hardness of described extexine is less than the shore D hardness of described endosexine.

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

8. a golf, is characterized in that, comprises:

Ball core, described ball core comprises thermoplastic;

Wrap up described interior ball and on self outer surface, have the top layer of multiple pit, wherein said golf meets following requirements:

(2) when described interior ball remains in the environment of 50 degrees Celsius constantly little at least about 8, under the load of 10-130kg, described interior ball has the second departure, the ratio of described second departure and described first departure between about 1.05 with about between 1.15, and

(3) when 40m/s, the recovery coefficient of described ball core approximately drops between 0.79 and 0.89, and 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 diameter that 3-6 kind is different.

13. golf according to claim 12, is characterized in that, the quantity with the pit of maximum gauge is greater than the quantity of other pits any respectively with small 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 be made up of the acid polymer composition of ionomer resin, highly neutralization, polyamide, mylar, polyurethane resin and their any combination.

18. golf according to claim 8, is characterized in that, described top layer comprises the extexine of endosexine and the described endosexine of parcel of wrapping up described interior ball; The shore D hardness of described extexine is less than the shore D hardness of endosexine.

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

20. golf according to claim 18, is characterized in that, described endosexine comprises the outer surface that shore D hardness is 45-65; Described extexine comprises the outer surface that shore D hardness is 40-60.