CN102294110A - Golf ball - Google Patents

Abstract

Disclosed is a golf ball, the ball cell is softer than prior balls. The ball includes a center portion, at least two intermediate tiers sequentially surrounding the center portion, and an outer tier surrounding the intermediate tiers, which comprises: said outer tier having a thickness in a range of 0.8 to 1.4 mm, and an a hardness (Shore D) in a range of 40 to 50; among the intermediate tiers, said first intermediate tier formed just below the outer tier, having a thickness in a range of 1.0 to 2.0 mm and a hardness (Shore D) in a range of 50 to 65; each intermediate tier formed just below the first intermediate tier having a thickness in a range of 1.3 to 1.5 mm, and a hardness (Shore D) in range of 30 to 70; the radius of the center portion is in a range of 5 to 18 mm, and a hardness (Shore D) in a range of 30 to 70; and a moment of inertia value of the golf ball is less than 83*gm2. According to the golf ball of the present invention, an iron spin force is excellent as compared to a conventional golf ball for a match, and the flying distance is almost same.

Description

Golf

Technical field

The present invention aims to provide a kind of golf, particularly be 100yd with interior Bail out in rotation good easily on the fruit mountain range, rod batting then can a minimizing rotation takes place, trajectory is low and increase and roll, and makes the further golf of lengthening of total distance.

Background technology

The R﹠amp of Britain; The USGA of the A and the U.S. has issued new regulation on January 1st, 2010, in have loft 25 above iron shots of degree (No. 5 iron shot～wedges) groove (club face groove) must not use original parallel classes, the groove total cross section is limited in 0.003 square inch (0.0762 square of mm) divided by the value of groove Pitch (Pitch=wide+spacing), and the sharp-pointed degree of the groove edge of groove is limited in 0.010 inch of minimum effective radius (0.254mm).

Find that through The experimental results in the period of using V-groove compared with the past, existing U word groove is almost close in the rotation that the district's rotation of thick grass obviously increases between alley batting and the district's batting of thick grass, has caused accuracy to be worth and has lowered.

Therefore, this time club groove rule purpose is to strengthen the difference that produces rotation between alley batting and the district's batting of thick grass, especially distinguish match request height technology at thick grass, thereby further improve importance, promptly improve the interests that correctly batting obtains down the batting accuracy.

In addition, the club regulation core content of change causes being difficult to produce rotation, therefore is badly in need of the easy screw of exploitation at present.That is, at present among the player of listing product used cover layer hardness 50 or more (unit: material Shao Shi D), but the ball of this type of hardness, be difficult to produce rotation when using the iron shot of satisfying new regulation, the golf player is very difficult to be parked in ball on the required point.

Have only and use the golf of the lower material of hardness as the cover layer material, the rotation that just can get required degree.But with the golf of the lower material of hardness after as cover layer, though can suitably increase rotation, rotation causes strength forward to be dispersed into reverse strength owing to producing excessively also can to occur a rod batting back simultaneously, and producing excessive upward force causes trajectory too high, landing ground angle increases makes rolling reduce the problem that finally causes range significantly to reduce.

In sum, need a kind of iron shot of exploitation easily to rotate the brand-new golf that while rod batting medium range can not reduce.

Summary of the invention

For satisfying the demand, the object of the invention is to provide a kind of cover layer (spherical shell layer) to have more soft hardness, easily rotation in Bail out, easily on the fruit mountain range, meanwhile limiting the moment of inertia value makes it reduce the rotation amount that produces in a rod batting, thereby suppress to produce excessive upward force, reduce trajectory, ground landing angle reduces, rolling increases, the golf that whole range is also strengthened thereupon.

Golf of the present invention is a golf that comprises ball center layer and wrap up at least 2 layers intermediate layer of described ball center layer successively and surround the spherical shell layer composition in described intermediate layer, and its characteristics are that described spherical shell layer thickness is in 0.8～1.4mm, hardness (unit: be 40～50 Shao Shi D); In the described intermediate layer the 1st intermediate layer thickness of close spherical shell layer 1.0～2.0mm, hardness (unit: be 50～65 Shao Shi D) are arranged; Each intermediate layer thickness of remainder of inboard, adjacent described the 1st intermediate layer is in 1.3～15mm, hardness (unit: be 30～70 Shao Shi D); Described ball center layer radius length is 5～18mm, hardness (unit: be 30～70 Shao Shi D); Described golf moment of inertia value is less than 83gcm ²

Simultaneously, described spherical shell layer is made up of ionomer resin.Described ionomer resin preferably contains the unsaturated carbonic acid (carbonic acid) of part carbon number 3～8 and the monoolefine (mono-olefin) of described carbonic ester (ester) at least, with neutralize at least ionomer resin of a part of the metal of valence 1 or 2.

Described spherical shell layer is preferably in ester class polyurethane, ether class polyurethane and the copolyether ester polymer class polyurethane and comprises a kind of polyurethane at least, the polyurethane elastomer of being made by polyol and diisocyanate and chain extender etc. forms, or polyalcohol and polyisocyanate salt 2 fluid polyurethanes of mutual mixed use in moulding are made.

And, described the 1st intermediate layer is made up of ionomer resin, described ionomer resin is preferably at the monoolefine (mono-olefin) that contains unsaturated carbonic acid of part carbon number 3～8 (carbonic acid) and described carbonic ester (ester) at least, with the metal of valence 1 or 2 a part of ionomer resin that neutralized at least.

Golf provided by the invention is pass by contest relatively with golf, and the rotation dynamics of iron shot is more outstanding, and also can show reciprocity performance on the range of a rod.

And cover layer (spherical shell layer) adopts soft relatively material, can obtain better push rod sensation and batting sensation.

Description of drawings

Fig. 1 is the rough sectional drawing of golf that shows one embodiment of the invention.

Fig. 2 is the rough sectional drawing of golf that shows another embodiment of the present invention.

Symbol description in the accompanying drawing

1,1a... golf 10... spherical shell layer

20... the 1st intermediate layer 22... the 2nd intermediate layer

24... the 3rd intermediate layer 30... ball center layer

The specific embodiment

The present invention for achieving the above object, ball center layer is considered as 1 layer to be made integral body and has 4 layers (when being called " 4PC (piece) ball ", 5 layers or more multi-layered golf usually, adjusting each layer thickness and density has after the various moment of inertia values it, analyze with swing robot and flying quality measurement mechanism measurement rotation amount and range, finally found the golf that can satisfy rotation amount and range condition simultaneously.

Find that by this experiment golf moment of inertia value should be less than 83gcm ²Be worth, and found the thickness separately and the relevant necessary condition of hardness of spherical shell layer, the 1st intermediate layer, the 2nd intermediate layer and other each layer.Therefore as long as satisfy the necessary condition that proposes below, then golf not only the moment of inertia value less than 83gcm ², and also can obtain required rotation amount.

Golf provided by the invention, spherical shell layer (appearance cover layer) thickness is 40～50 in 0.8～1.4mm, hardness (Shore D); The 1st intermediate layer (appearance plays the second layer) thickness is 50～65 in 1.0～3.0mm, hardness (Shore D); It is 30～70 in 1.3～15mm, hardness (Shore D) that each layer thickness is played in the 2nd intermediate layer (the outermost top layer is played the 3rd layer).The ball center layer radius length is that 5～18mm, hardness are Shao Shi D 30～70.

And golf of the present invention has less than 83gcm ²The moment of inertia value.

In addition, if described spherical shell layer thickness less than 0.8mm, nick part and no nick part that golf surface forms, its batting back flight is teased bigger, if greater than 1.4mm then cause the range loss should not adopt greatly.

And the cover layer hardness of spherical shell layer (Shore D) will reduce the feasible purpose that can't reach the present invention of iron shot revolving force greater than 50, if less than 40, then can cause a rod range obviously to shorten, and consumer's preference degree also can decrease.

Described the 1st intermediate layer thickness then can shorten range less than 1.0mm, greater than can not get good touch more than the 3.0mm, also should not adopt.The 1st intermediate layer hardness (Shore D) is if exist range to shorten problem less than 50, greater than then occurring the bad problem of touch more than 65.

Each layer thickness is played between 1.3～15mm in described the 2nd intermediate layer, considers that other thickness and ball center layer radius length and golf integral diameter suitably adjust.The ball center layer radius length considers that between 5～18mm other layer thickness and golf integral diameter suitably adjust.

That is, if golf of the present invention as 4 balls, spherical shell layer and the 1st intermediate layer thickness and hardness satisfy above-mentioned necessary condition, the 2nd intermediate layer thickness between 1.3～15mm, the ball center layer radius length gets final product between 5～18mm.At this moment, consider golf integral diameter size, suitably adjust the 2nd intermediate layer thickness and ball center layer size and get final product.

For example, the thicker ball center layer radius that then makes relatively of the 2nd intermediate layer thickness diminishes, and makes the golf diameter within the required range.Greater than more than the 42.67mm, but more favourable to range because of minor diameter golf usually, therefore most of golf only is slightly larger than 42.67mm with golf diameter regulation in contest at present.The golf diameter is equally at 42.7mm among the 1st, 2 embodiment of the present invention.

And golf is under 5 layers of ball situation, makes spherical shell layer and the 1st intermediate layer thickness and hardness satisfy above-mentioned necessary condition equally, and between each leisure 1.3～15mm of the 2nd intermediate layer and 3 intermediate layer thickness, the ball center layer radius length gets final product between 5～18mm.Satisfy required golf in order to make diameter this moment equally, suitably mutually adjusts the 2nd, 3 intermediate layer thickness and ball center layer size and get final product.

And, golf is under 6 layers or the 7 layers of situation, make spherical shell layer and the 1st intermediate layer thickness and hardness satisfy above-mentioned necessary condition equally after, consider whole golf diameter, make between each leisure 1.3～15mm of the 2nd, 3,4 or 5 intermediate layer thickness, the ball center layer radius gets final product between 5～18mm.

If if each layer thickness then can't produce significant influence to moment of inertia less than 1.3mm below this moment the 2nd intermediate layer, if greater than more than the 15mm, then with on other each ATM layer relationsATM can't fully guarantee the thickness of other layer to adopt equally.

Be positioned at the layer and the ball center layer of the 2nd intermediate layer below,,, therefore be fit to use the material of hardness between 30～70 if greater than 70 then touch is bad if hardness (Shore D) value then causes range obviously to shorten less than 30 separately.

Fig. 1 has shown the golf sectional view of the present invention the 1st embodiment roughly.

The golf of the 1st embodiment (1) belongs to 4 layers of ball.Golf (1) is made up of spherical shell layer (10), the 1st intermediate layer (20), the 2nd intermediate layer (22) and ball center layer (30).

Described spherical shell layer (10) thickness is Shao Shi D48 in 1.325mm, hardness.Thickness can be other value in 0.8～1.4mm scope among the other embodiment, and hardness can be other value between 40～50 equally.

Spherical shell layer (10) is made of ionomer resin.Ionomer resin is the unsaturated carbonic acid (carbonic acid) that contains part carbon number 3～8 at least and the monoolefine (mono-olefin) of described carbonic ester (ester), with neutralize at least ionomer resin of a part of the metal of valence 1 or 2.

Spherical shell layer can be to comprise a kind of polyurethane at least in ester class polyurethane, ether class polyurethane and the copolyether ester polymer class polyurethane among the other embodiment.

The polyurethane elastomer that this type of polyurethane is made by polyol and diisocyanate and chain extender etc. forms, or polyalcohol and polyisocyanate salt 2 fluid polyurethanes of mutual mixed use in moulding are made.

Described the 1st intermediate layer (20) thickness is Shao Shi D45 in 1.45mm, hardness.Thickness can be other interior value of 1.0～2.0mm scope in other embodiments in addition, and hardness can be other value between 50～65 equally.

The 1st intermediate layer (20) is made of ionomer resin.Ionomer resin is the unsaturated carbonic acid (carbonic acid) that contains part carbon number 3～8 at least and the monoolefine (mono-olefin) of described carbonic ester (ester), with neutralize at least ionomer resin of a part of the metal of valence 1 or 2.

Described the 2nd intermediate layer (22) thickness is Shao Shi D45 in 6.55mm, hardness.Thickness can be other interior value of 1.3～15mm scope in other embodiments in addition, and hardness can have other value between 30～70 equally.

Described ball center layer (30) radius length is that 12.05mm, hardness are Shao Shi D52.Thickness can be other interior value of 5～18mm scope in other embodiments in addition, and hardness can have other value between 30～70 equally.

The concrete material of the 2nd intermediate layer and ball center layer sees the following form.But situations such as consideration hardness, density can suitably be selected material.

The moment of inertia of golf in the present embodiment (1) is 82.36gcm ², the computing formula aftermentioned.

Fig. 2 has shown the rough sectional view of golf of the present invention the 2nd embodiment.

Golf among the 2nd embodiment (1a) is 5 layers of ball.Golf (1a) is made up of spherical shell layer (10), the 1st intermediate layer (20), the 2nd intermediate layer (22), the 3rd intermediate layer (24) and ball center layer (30).Each is formed related description and directly or suitably is out of shape the explanation that is suitable for the 1st embodiment.

Simultaneously, as 5 layers of golf of other embodiment of the present invention the 3rd, 4 embodiment are proposed.Golf is compared with the 2nd embodiment among this type of the 3rd, 4 embodiment, and 5 layers of structure is identical but physics value and the 2nd embodiment each layer and ball center layer are different.3rd, 4 embodiment are similar because of global shape and the 2nd embodiment, therefore do not propose drawing in addition.

The spherical shell layer of each golf of described the 1st, 2,3,4 embodiment, intermediate layer and ball center layer diameter, weight, hardness number show below with table.

Simultaneously, following table has together write down the reference examples 1,2,3,4 of having carried out contrast test with the embodiment of the invention.

Write down the concrete allotment ratio of each layer of the 1st embodiment and reference examples 1 and even 4 in the following table.

Write down each layer allotment ratio of the 2nd, 3,4 embodiment and reference examples 5 and even 7 below.

Simultaneously, find the solution moment of inertia formula quoting following two works " Fundamentals of Physics 7/e by David Halliday; 2006; p302-p305 " and " Physics for Scientists and Engineers with Modern Physics 6/e by Raymond A.Serway; 2004, p211-p217 ".

As general formula not the ball moment of inertia I that forms of 4 layers of homogeneity can try to achieve from following formula.From laterally each of the part layer radius that is positioned at the center is that ri, each layer density are ρ i.

Moment of inertia (I):

$\∫{\mathrm{\γ}}^2\mathrm{dm}=$

$\frac{8}{15}\mathrm{\&pi;}{\mathrm{\&rho;}}_1{{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="HSA00000511640800011.png"\; state="\{\{state\}\}">r</figure-callout>}}_1}^5+\frac{8}{15}\mathrm{\&pi;}{\mathrm{\&rho;}}_2({r_2}^5-{{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="HSA00000511640800011.png"\; state="\{\{state\}\}">r</figure-callout>}}_1}^5)+\frac{8}{15}\mathrm{\&pi;}{\mathrm{\&rho;}}_3({r_3}^5-{r_2}^5)+\frac{8}{15}\mathrm{\&pi;}{\mathrm{\&rho;}}_4({r_4}^5-{r_3}^5)$

Utilize above-mentioned formula to try to achieve the moment of inertia value of above-mentioned the 1st, 2,3,4 embodiment and reference examples.Moment of inertia value I uses gcm in the following table ²Unit converts length in the above-mentioned table by cm.

Write down the flying quality value of the present invention the 1st, 2,3,4 embodiment and reference examples 1 and even 7 in the following table.Be used to test equipment be Iron Byron Robot, Trackman measuring instrument, the examination bar of playing ball has used SHAFT-10.5 ° of Callaway Driver-' R ', testing location is the applicant's R﹠amp; The D center.

Can confirm the following fact in the above-mentioned table.

The first, relatively reference examples 1 (2PC), reference examples 2 (3PC), reference examples 3 (3PC) are found, the rotation amount of reference examples 2 (3PC) is that minimum only is 1964, range is the longest.This point has confirmed can make under the also little situation of the little while rotation amount of moment of inertia value the fact of range increase.But 2PC, 3PC reduce than its range of 4PC, 5PC because of having only one deck at centre of sphere upper caldding layer, therefore are not suitable as golf of the present invention.

The second, relatively the 1st embodiment (4PC), reference examples 4 (4PC) are found, it only is 2001 that the 1st embodiment rotation amount shows littler, and range has then had more 0.5yd, has confirmed moment of inertia effect of the present invention.

Three, the moment of inertia of the 2nd embodiment (5PC), embodiment 3 (5PC), the 4th embodiment (5PC) is less than 83 (gcm ²), the moment of inertia of reference examples 5 (5PC), reference examples 6 (5PC), reference examples 7 (5PC) is greater than 83 (gcm ²), the mean range of the mean range relative comparison example 5 (5PC) of the 2nd embodiment (5PC), the 3rd embodiment (5PC), the 4th embodiment (5PC), reference examples 6 (5PC), reference examples 7 (5PC) has had more 2.2yd, has confirmed moment of inertia effect of the present invention thus.

Simultaneously, use term as follows in this specification.

The English of ' covering ' is ' cover ', refers to that golf outermost top layer is a spherical shell layer, and material is a resin.The English of ' rotation ' is ' spin ', the rotation of expression golf.' rod ' English for ' driver ' be one of golf clubs.The English of ' rolling ' is ' run ', refers to the distance that golf rolled.The English of ' flying distance ' be ' carry ', refer to the distance of golf ball flight.The English of ' iron ' is ' iron ', is one of golf clubs title.The English of ' groove ' is ' groove ', refers to the groove of recessed of ball head.' ball wedge ' English is ' wedge ', is one of golf clubs title.The English of ' ionomer ' is ' ionomer ', is the resin title that contains metal ion.

Claims (4)

1. a golf comprises ball center layer and wraps up at least 2 layers intermediate layer of described ball center layer successively and the spherical shell layer that surrounds described intermediate layer, it is characterized in that,

Described spherical shell layer thickness is in 0.8～1.4mm, hardness (unit: be 40～50 Shao Shi D);

In the described intermediate layer the 1st intermediate layer thickness of close described spherical shell layer in 1.0～2.0mm, hardness (unit: be 50～65 Shao Shi D);

Each intermediate layer thickness of remainder below adjacent described the 1st intermediate layer is in 1.3～15mm, hardness (unit: be 30～70 Shao Shi D);

Described ball center layer radius length is 5～18mm, hardness (unit: Shao Shi D) 30～70;

Described golf moment of inertia value is less than 83gcm ²

2. according to the described golf of claim 1, wherein,

Described spherical shell layer is made up of ionomer resin;

Described ionomer resin, be monoolefine (mono-olefin), with neutralize at least ionomer resin of a part of the metal of valence 1 or 2 for the ester (ester) of unsaturated carbonic acid that contains carbon number 3～8 to small part (carbonic acid) and described carbonic acid.

3. golf according to claim 1, wherein,

Described spherical shell layer, the polyurethane elastomer of being made by polyol and diisocyanate and chain extender etc. forms, or polyalcohol and polyisocyanate salt 2 fluid polyurethanes of mutual mixed use in moulding form the golf of its characteristics,

Described polyurethane comprises at least and is selected from a kind of in ester class polyurethane, ether class polyurethane and the copolyether ester polymer class polyurethane.

4. golf according to claim 1, wherein,

Described the 1st intermediate layer is made up of ionomer resin,

Described ionomer resin, be monoolefine (mono-olefin), with neutralize at least ionomer resin of a part of the metal of valence 1 or 2 for the ester (ester) of unsaturated carbonic acid that contains carbon number 3～8 to small part (carbonic acid) and described carbonic acid.

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