JPS6373979A - Two-piece solid golf ball - Google Patents
Two-piece solid golf ballInfo
- Publication number
- JPS6373979A JPS6373979A JP61220626A JP22062686A JPS6373979A JP S6373979 A JPS6373979 A JP S6373979A JP 61220626 A JP61220626 A JP 61220626A JP 22062686 A JP22062686 A JP 22062686A JP S6373979 A JPS6373979 A JP S6373979A
- Authority
- JP
- Japan
- Prior art keywords
- golf ball
- cover
- ball
- inner core
- hardness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007787 solid Substances 0.000 title claims description 19
- 238000005452 bending Methods 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000003431 cross linking reagent Substances 0.000 description 9
- 229920001971 elastomer Polymers 0.000 description 9
- 239000005060 rubber Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920000554 ionomer Polymers 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 150000002763 monocarboxylic acids Chemical class 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- XKMZOFXGLBYJLS-UHFFFAOYSA-L zinc;prop-2-enoate Chemical compound [Zn+2].[O-]C(=O)C=C.[O-]C(=O)C=C XKMZOFXGLBYJLS-UHFFFAOYSA-L 0.000 description 2
- PAOHAQSLJSMLAT-UHFFFAOYSA-N 1-butylperoxybutane Chemical compound CCCCOOCCCC PAOHAQSLJSMLAT-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- 230000006583 body weight regulation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000005673 monoalkenes Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は内核とカバーから成るツーピースソリッドゴル
フボールに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a two-piece solid golf ball comprising an inner core and a cover.
（従来の技術およびその問題点）
ツーピースソリッドゴルフボールは一般に飛距離はでる
がスピンがかかりにくく、その若地ｆｆ＋度の低い特徴
的な弾道からアイアンショツト時に止まり難い欠点を有
している。従って、ｆＦ！在スビスピン性能めるため、
カバーの厚さを薄くし、カバーの曲げ弾性率を下げ（即
し、カバー硬度を柔らかくシ）、さらに内核の硬度を高
くすること等の方法によりボールの圧縮変形ｆ７ｉを小
さくすること１こより文・ｊ処している。(Prior Art and its Problems) Two-piece solid golf balls generally have a long flight distance but are difficult to spin, and have the disadvantage that they are difficult to stop when hitting an iron shot due to their characteristic trajectory with a low ff+ degree. Therefore, fF! In order to improve the current pin performance,
To reduce the compressive deformation f7i of the ball by reducing the thickness of the cover, lowering the bending modulus of the cover (that is, softening the hardness of the cover), and increasing the hardness of the inner core.・J treatment.
ところが、カバーを、例えば材質として軟質アイオノマ
ー、軟質ポリウレタンを用いたり、軟質ポリエステルと
アイノマー樹脂との混合物を用いて柔らかくした場合、
スピン性能は向上するもののボールの相速度が低下して
飛距離がでなくなる。However, when the cover is made soft using, for example, a soft ionomer, soft polyurethane, or a mixture of soft polyester and ionomer resin,
Although the spin performance improves, the phase velocity of the ball decreases, making it impossible to fly the ball far.
また、ボールの圧縮変形量を小さくするので、ホール打
撃時のフィーリングも悪くなり、現段階では必ずしも満
足のいく性能をａしたツーピースソリッドゴルフボール
が得られていない（例えば、特開昭６Ｏ−１６３（３７
３号、同６！−１４９１７８号、同５７−３４８７４号
等）。In addition, since the amount of compressive deformation of the ball is reduced, the feeling when hitting the hole becomes worse, and at this stage, two-piece solid golf balls with satisfactory performance have not been obtained (for example, JP-A No. 6 O- 163 (37
No. 3, No. 6! -149178, 57-34874, etc.).
（問題点を解決するための手段）
不発明はツーピースソリッドゴルフボールの相速度を低
下させることなく、またボールの圧縮変形ｍを小さくせ
ずにボールのスピン性能を高めるために、ツーピースソ
リッドゴルフボールの内核の硬度分布およびカバーの諸
性能に着目して完成された。即ち、本発明は内核とカバ
ーから成るツーピースソリッドゴルフボールにおいて、
該内核がＪＴＳ−Ｃ型硬度計で測定された表面硬度５５
〜７５、表面層を除く断面硬度７５〜９０を有し、該カ
バーが厚さ０．７〜２ 、２ ｍｍ、曲げ弾性率３５０
０〜６０００ｋｇ／ｃｍ２を有し、かつツーピースソリ
ッドゴルフボールが初荷重１０ｋｇから総荷重１３０ｋ
ｇかけた時の圧縮変形量が２．２〜３゜０＋＋＋ｍであ
ることを特徴とするツーピースソリッドゴルフボールを
提供する。(Means for Solving the Problems) The present invention provides a two-piece solid golf ball in order to improve the spin performance of the ball without reducing the phase velocity of the two-piece solid golf ball and without reducing the compressive deformation m of the ball. It was completed by focusing on the hardness distribution of the inner core and various performances of the cover. That is, the present invention provides a two-piece solid golf ball consisting of an inner core and a cover.
The inner core has a surface hardness of 55 measured with a JTS-C type hardness meter.
-75, cross-sectional hardness excluding the surface layer of 75-90, the cover has a thickness of 0.7-2.2 mm, and a flexural modulus of 350.
0 to 6000 kg/cm2, and the two-piece solid golf ball has an initial load of 10 kg to a total load of 130 kg.
To provide a two-piece solid golf ball characterized in that the amount of compressive deformation when multiplied by g is 2.2 to 3°0+++m.
本発明のゴルフボールは内核表面を軟らかくして、薄い
カバーをかぶせているように設計される。The golf ball of the present invention is designed to have a soft inner core surface covered with a thin cover.
このように設計されたゴルフボールは、ボール打撃時の
クラブに接触する面積が大きく、従来カバー硬度が硬い
とクラブ表面上でスリップしてスピン性能が低下すると
いわれてきた欠点を解消し、カバー硬度が硬くてもスピ
ンがよくかかる。しがら内核表面が柔らかいため、衝撃
を吸収してフィーリングのソフトなゴルフボールが得ら
れることが判明した。A golf ball designed in this way has a large surface area that comes in contact with the club when the ball is hit, eliminating the drawback that conventionally it was said that if the cover hardness is hard, it will slip on the club surface and reduce spin performance. Even if it is hard, it spins well. However, because the inner core surface is soft, it has been found that a golf ball with a soft feel can be obtained by absorbing impact.
本発明のツーピースソリッドゴルフボールに用いられる
内核は通常の方法により、加硫条件、配合比等を調節す
ることにより得られる。The inner core used in the two-piece solid golf ball of the present invention can be obtained by a conventional method by adjusting the vulcanization conditions, compounding ratio, etc.
通常、内核の配合には基１オゴム、架橋剤、共架橋剤、
不活性充填剤等が含まれる。Usually, the composition of the inner core includes a group-1 rubber, a crosslinking agent, a co-crosslinking agent,
Contains inert fillers, etc.
基オゴムとしては従来からツーピースソリッドゴムに用
いられている適宜の天然ゴムおよび／または合成ゴムを
使用することができるが、本発明においては、ンス構造
を少なくとら１００％以上有する１、４−ポリブタジェ
ンが特に好ましく、所望により該ポリブタジェンに天然
ゴム、ポリイソプレンゴム、スヂレンブタノエンゴム等
の適宜配合してもよい。As the base rubber, any suitable natural rubber and/or synthetic rubber that has been conventionally used in two-piece solid rubber can be used. is particularly preferred, and if desired, natural rubber, polyisoprene rubber, styrene-butanoene rubber, etc. may be appropriately blended with the polybutadiene.
架橋剤としてはジクミルパーオキサイドや１−ブチルパ
ーオキサイドのような有に過酸化物等が例示されろか、
特に好ましい乙のはジクミルパーオキサイドである。Examples of crosslinking agents include peroxides such as dicumyl peroxide and 1-butyl peroxide.
Particularly preferred is dicumyl peroxide.
架橋剤の配合量は基材ゴム１００重量部に対して通常０
．５〜３．０重量部、好ましくは１．０〜２゜５重量部
である。The amount of crosslinking agent is usually 0 per 100 parts by weight of the base rubber.
．． The amount is 5 to 3.0 parts by weight, preferably 1.0 to 2.5 parts by weight.
共架橋剤としては特に限定するものではないが、不飽和
脂肪酸の金属塩、就中、炭素原子数３〜８の不飽和脂肪
酸（例えばアクリル酸、メタクリル酸等）の亜鉛塩やマ
グネシウム塩が例示されるが、アクリル酸亜鉛が特に好
適で、この配合量は基材ゴム１００重量部に対して３０
〜３８重主部、好ましくは３２〜３６重量部である。Examples of the co-crosslinking agent include, but are not particularly limited to, metal salts of unsaturated fatty acids, particularly zinc salts and magnesium salts of unsaturated fatty acids having 3 to 8 carbon atoms (for example, acrylic acid, methacrylic acid, etc.). However, zinc acrylate is particularly preferred, and the blending amount is 30 parts by weight per 100 parts by weight of the base rubber.
~38 parts by weight, preferably 32-36 parts by weight.
不活性充填剤としては酸化亜鉛、硫酸バリウム、シリカ
、炭酸カリシラムおよび炭酸亜鉛等が例示されるが、酸
化亜鉛が一般的で、その配合量は内核と外皮の比重、ボ
ールの重量規洛等に左右され、特に限定的でないが、通
常は基オジム１００重ｈ１部に対して１０〜６０重量部
である。Examples of inert fillers include zinc oxide, barium sulfate, silica, calicylum carbonate, and zinc carbonate, but zinc oxide is common, and its amount depends on the specific gravity of the inner core and outer shell, the weight regulation of the ball, etc. Although not particularly limited, it is usually 10 to 60 parts by weight per 100 parts by weight of the base ozim.
上記成分を配合して得られる内核用組成物は常套の、昆
練機、例えばバンバリーミキサ−やロール等を用いて混
練し、内核用金車に圧縮または射出成形し、成形体を架
橋剤および共架橋剤が作用するのに十分な温度（例えば
架橋剤としてツクミルパーオキサイドを用い、共架橋剤
としてアクリル酸亜鉛を用いた場合には約１３０〜１７
０℃）で加熱硬化して直径がラージサイズの場合は約３
８゜５〜約４１．４ｍｍ、スモールサイズの場合は約３
６．９〜約３９．９ｍｍの内核を調製する。The composition for the inner core obtained by blending the above components is kneaded using a conventional kneading machine, such as a Banbury mixer or roll, and then compressed or injection molded into a metal wheel for the inner core, and the molded body is mixed with a crosslinking agent and Sufficient temperature for the co-crosslinking agent to act (for example, when Tsucumyl peroxide is used as the crosslinking agent and zinc acrylate is used as the co-crosslinking agent, the
Approximately 3 if the diameter is large size when heated and cured at 0℃)
8゜5～about 41.4mm, about 3 for small size
Prepare an inner core of 6.9 to about 39.9 mm.
本発明では特に内核の表面硬度を５５〜７５、好ましく
は６５〜７０に、かつ内核の表面部分を除く断面硬度を
７５〜９０、好ましくは８０〜８５の範囲になるように
加硫条件、配合比等を適宜調整する。表面硬度および断
面硬度はいずれもＪＩＳ−Ｃ型硬度計で測定する。測定
方法はＪＩＳＫ ６３０１の方法で行なわれる。表面硬
度はＪＩＳ−Ｃ型硬度計の押針を内核表面に垂直になる
ように加圧面を接触させ、ただちに目盛を読み取る。In the present invention, in particular, the vulcanization conditions and composition are set so that the surface hardness of the inner core is in the range of 55 to 75, preferably 65 to 70, and the cross-sectional hardness excluding the surface portion of the inner core is in the range of 75 to 90, preferably 80 to 85. Adjust the ratio etc. as appropriate. Both surface hardness and cross-sectional hardness are measured using a JIS-C type hardness meter. The measurement method is JISK 6301 method. The surface hardness is determined by bringing the pressing needle of a JIS-C type hardness meter into contact with the pressure surface perpendicular to the inner core surface, and immediately reading the scale.
断面硬度は内核の断面で同様の測定した場合の測定値で
ある。厳密には表面便度測定時に進入する測定針の深さ
に相当する部分は断面であっても表面硬度により測定さ
れるので、断面硬度は表面から約２ｍｍの部分を除く断
面の硬度という。表面硬度が５５より小さい場合は、内
核の加硫が不足して適正な硬変が得られない状態であり
、ボールの初速度が低下する。表面硬度が、７５を越え
るとスピン性能が悪くなる。断面硬度が７５より小さい
とボール初速が低下し、９０を越えると硬くなり過ぎて
、打撃時のフィーリングが悪くなる。The cross-sectional hardness is a measured value when similar measurements are made on the cross-section of the inner core. Strictly speaking, the surface hardness is measured even if the section corresponds to the depth of the measuring needle that enters when measuring the surface roughness, so the section hardness is referred to as the hardness of the section excluding the section approximately 2 mm from the surface. If the surface hardness is less than 55, the inner core is insufficiently vulcanized and proper hardness cannot be obtained, and the initial velocity of the ball decreases. If the surface hardness exceeds 75, the spin performance will deteriorate. If the cross-sectional hardness is less than 75, the initial velocity of the ball will decrease, and if it exceeds 90, the ball will be too hard, resulting in poor feel when hitting.
以上のようにして得られる内核は厚さ０．７〜２ 、２
ｍｍ、好ましくは１．０〜２．０ｍｍのカバーで被覆
される。カバーとしてはアオノマー樹脂を主材とし、必
要により着色等の目的で無機充填剤（例えば二酸化チタ
ン、硫酸バリウム等）を含有させ−たらのが通常使用さ
れる。カバーの厚さは通常ボールの任意の軸上の２点付
近とこの２点を北極と南極とした場合の赤道上のほぼ等
距離の４点付近の６点付近を打抜いてディンプルにかか
らない部分のカバーをノギスで測定し、その平均を、求
めることにより測定される。カバーのｊ７さが０．７ｍ
ｍより小さいのは、ボールにディンプルを施すので好ま
しくない。２．２ｍｍを越えると、スピンがかかりにく
く、またフィーリングが悪い。The inner core obtained as above has a thickness of 0.7 to 2,2
covered with a cover of mm, preferably 1.0 to 2.0 mm. The cover is usually made of an aonomer resin and, if necessary, contains an inorganic filler (for example, titanium dioxide, barium sulfate, etc.) for the purpose of coloring. The thickness of the cover is usually the part that does not cover the dimples by punching out around 2 points on any axis of the ball and around 6 points around 4 points approximately equidistant on the equator, assuming these two points are the north and south poles. It is measured by measuring the cover with a caliper and finding the average. Cover j7 length is 0.7m
If it is smaller than m, the ball will be dimpled, which is not preferable. If it exceeds 2.2 mm, spin will be difficult to apply and the feeling will be poor.
好ましいアイノマー樹脂はモノオレフィンと炭素原子数
３〜８の不飽和モノまたはジカルボン酸およびそれらの
エステルから成る群から選択される少なくとも１種との
重合体（不飽和モノまたはジカルボン酸および／または
これらのエステル４〜３０重量％含有）に交差金属結合
を付与した熱可塑性樹脂である。このようなアオノマー
樹脂としては三井デュポンポリケミカル社から市販され
ている各種の「ハイミラン」（例えば、ハイミラン１５
５５．１５５７．１７０７．１７０６．１６０５等また
はこれらの組合せ）が例示される。A preferred ionomer resin is a polymer of a monoolefin and at least one member selected from the group consisting of unsaturated mono- or dicarboxylic acids having 3 to 8 carbon atoms and esters thereof (unsaturated mono- or dicarboxylic acids and/or esters thereof). It is a thermoplastic resin in which cross-metal bonds are added to ester (containing 4 to 30% by weight of ester). Examples of such aonomer resins include various types of "Himilan" (for example, Himilan 15) commercially available from DuPont Mitsui Polychemicals Co., Ltd.
55.1557.1707.1706.1605, etc. or a combination thereof).
本発明ではカバーは曲げ弾性率を３５００〜６０００
ｋｇ／ｃｍ’、好ましくは４０００〜５０００ｋｇ／ｃ
ｍ２に設定される。曲げ弾性率はＡ Ｓ Ｔ Ｍｌ）−
７９０によりｉｆｌ、１足された値である。アイオノマ
ー樹脂には種々の曲げ弾性率のらのが市販されてしり、
これらを選定または混合ずろことにより所定の曲げ弾性
率のものが得られろ。１１旧デ弾性率が３５００ ｋｇ
、７ｃｍ２より小さい場合はカバーが柔らかくなり過ぎ
、飛距離が不足し、６０００ ｋｇ／ｃｍ’より大きい
場合にはボール打撃時のフィーリングが硬くなり過ぎ、
適当でない。In the present invention, the cover has a flexural modulus of 3500 to 6000.
kg/cm', preferably 4000-5000 kg/c
m2. The flexural modulus is A S T Ml)-
790 is the value obtained by adding ifl and 1. Ionomer resins with various flexural moduli are commercially available.
By selecting or mixing these materials, a material with a predetermined bending elastic modulus can be obtained. 11 Old deelastic modulus is 3500 kg
If it is smaller than 7cm2, the cover will be too soft and the flight distance will be insufficient, and if it is larger than 6000 kg/cm', the feeling when hitting the ball will be too hard.
It's not appropriate.
カバーを内核に被覆する方法は特に限定的ではないが、
通常は予め半球殻状に成形した２枚のカバーで内核を包
み、加熱加圧成形するが、カバー用組成物を射出成形し
て内核を包みこんでもよい。The method of covering the inner core with the cover is not particularly limited, but
Usually, the inner core is wrapped in two covers that have been preformed into hemispherical shell shapes, and the inner core is molded under heat and pressure, but the inner core may also be wrapped around the inner core by injection molding the cover composition.
得られたゴルフボールの圧縮変形量も打撃時のフィーリ
ング、スピン性能に影響を与える。ここでいう圧縮変形
量はゴルフボールに対し初荷重１０ｋｇから終荷重１３
０ｋｇを掛けた場合のホールの変形量であり、本発明の
場合２，２〜３ 、 Ｏｍｍが好ましい。圧縮変形量が
２ 、２ ｍ＋ｎ以下の場合にはボールが硬すぎ、打撃
時のフィーリングか悪くなる。The amount of compressive deformation of the resulting golf ball also affects the feel at impact and spin performance. The amount of compressive deformation mentioned here is from an initial load of 10 kg to a final load of 13 kg for a golf ball.
This is the amount of deformation of the hole when multiplied by 0 kg, and in the case of the present invention, it is preferably 2.2 to 3 Omm. If the amount of compressive deformation is less than 2.2 m+n, the ball will be too hard and will have a poor feel when hit.
３ 、 Ｏｍｍを越えるとボールが柔らかくなり過ぎ、
スピン性能が低下し好ましくない。3. If it exceeds 0mm, the ball will become too soft.
This is undesirable because the spin performance deteriorates.
本発明のツーピースソリッドゴルフボールはカバーの諸
性性とボールのＩ′ｒ、縮度形量において好適な組合せ
が存在する。特に、カバー厚み１．０〜１ 、７ ｍｍ
、カバー曲げ弾性率４０００〜６０００１（ｇ／ｃｍ”
およびボールの圧縮変形ｍ ２ 、２〜２ 、’ ８
ｍｍ（望ましくは２．３〜２ 、６ ｍｍ）の組合せが
好適である。また、カバー厚さ１．３〜２ 、０ ｍｍ
、曲げ弾性率３５００〜５０００ ｋｇ／ｃｍ２で圧縮
変形量２゜３〜３．０ｍｍ（望ましくは２．４〜２．８
ｍｍ）が好適である。The two-piece solid golf ball of the present invention has a suitable combination of cover properties, ball I'r, and curvature. In particular, the cover thickness is 1.0 to 1.7 mm.
, cover bending modulus 4000-60001 (g/cm")
and compressive deformation of the ball m2, 2~2,'8
A combination of mm (preferably 2.3 to 2.6 mm) is suitable. In addition, the cover thickness is 1.3 to 2.0 mm.
, bending elastic modulus 3500-5000 kg/cm2 and compressive deformation 2°3-3.0 mm (preferably 2.4-2.8
mm) is preferred.
（実施例） 本発明を実施例に基づいて更に詳細に説明する。(Example) The present invention will be explained in more detail based on examples.
実施例■および比較例【
〈内核の調製〉
表−１の配合を混練ロールを用いて混練し、表−ｉに示
す加硫条件で加圧成形して５種の内核（１〜）を調製し
た。Ｊ Ｉ Ｓ−Ｃ型硬度計による硬度分布を表−１に
示す。Example ■ and Comparative Example [<Preparation of inner core> The formulations shown in Table-1 were kneaded using a kneading roll, and five types of inner cores (1 to 1) were prepared by pressure molding under the vulcanization conditions shown in Table-i. did. Table 1 shows the hardness distribution measured by the JIS-C type hardness tester.
くツーピースゴルフボールの調製〉
上記内核を表−２に示すカバー樹脂の混合物から得られ
た２枚の半球殻状カバーで表−３に示す組合せで包み、
１５５℃で５分間加圧成形して直径４２．８ｍｍのラー
ジサイズのツーピースソリッドゴルフボールを製造した
。得られたゴルフボールの諸物性を表−３に示す。Preparation of Two-Piece Golf Ball The inner core was wrapped with two hemispherical shell-like covers obtained from the mixture of cover resins shown in Table 2 in the combination shown in Table 3,
A large two-piece solid golf ball having a diameter of 42.8 mm was produced by pressure molding at 155° C. for 5 minutes. Table 3 shows the physical properties of the golf ball obtained.
ボール１，２．３を比較すると、カバーの曲げ弾性率が
高い程ボールは硬く、初速塵は速くなるが、スピンがか
かりにくくなる。現在市販されているツーピースボール
は、曲げ弾性率的２５００〜３５００ ｋｇ／ｃｍ’の
アイオノマー樹脂か使われているので、材料的に見れば
、スピンは比較的かかるが、糸まきゴルフボールと比べ
ると、まだ充分でない。半面、曲げ弾性率が高いと、打
撃時のフィーリングが悪化するため、現時点でも硬いと
されているツーピースポールには、曲げ弾性率がさらに
高い材料はボール初速度は高くなるが（本発明の内核を
用いない場合は）不適当である。Comparing Balls 1 and 2.3, the higher the bending elastic modulus of the cover, the harder the ball is, the faster the initial velocity, but the harder it is to spin. The two-piece balls currently on the market are made of ionomer resin with a bending modulus of 2,500 to 3,500 kg/cm', so from a material perspective they have relatively high spin, but compared to thread-wound golf balls. , still not enough. On the other hand, if the flexural modulus is high, the feeling when hitting will deteriorate, so two-piece poles, which are still considered to be hard at the moment, are made of materials with a higher flexural modulus, although the initial ball speed is higher (the present invention). (If the inner core is not used) is inappropriate.
ボール３と４を比較すると、カバー厚みが薄くなると、
スピンがかかりやすくなるが、ボール耐久性が悪化、打
撃時のフィーリングら改善されるものの、まだやや硬く
感じられる。このため従来の考え方からすると、カバー
厚みを薄くするには、（本発明の内核を用いない場合は
）カバーの曲げ弾性率を柔らかくする方が良いことにな
る。Comparing balls 3 and 4, when the cover thickness becomes thinner,
Although it spins more easily, the durability of the ball deteriorates, and although the feel when hitting is improved, it still feels a little hard. Therefore, from the conventional thinking, in order to reduce the thickness of the cover, it is better to soften the flexural modulus of the cover (if the inner core of the present invention is not used).
ボール１，２．３．４とボール７（本発明）とを比較す
ると、本発明のものの方が、ボール初速ら速く、耐久性
も良好で接触面積も大きかった。このため、スピンはよ
くかかり、またフィーリングも良好であった。このよう
にカバー曲げ弾性率が高くてもフィーリングは硬くなく
、また打撃時の変形が大きいため、クラブに接触する面
積が大きく、ボール初速度も速いので、スピンがよくか
かる糸巻きボールの特徴を備えたツーピースソリッドゴ
ルフボールが得られた。When Ball 1, 2.3.4 and Ball 7 (invention) were compared, the ball of the invention had a higher initial velocity, better durability, and a larger contact area. Therefore, the spin was good and the feeling was also good. Even though the cover has a high bending modulus, it does not feel hard, and since the deformation during impact is large, the contact area with the club is large, and the ball's initial speed is high, so it has the characteristics of a wound ball that spins well. A two-piece solid golf ball was obtained.
ボール７（本発明）とボール５（比較）とを比較すると
、ボール５の方が内核の硬度が柔らかすぎるため、ボー
ル硬度も柔らかくなりすぎ、結果的にスピン量も少なく
なった。Comparing Ball 7 (invention) and Ball 5 (comparison), Ball 5 has an inner core that is too soft, so the ball hardness is also too soft, and as a result, the spin rate is also low.
ボール４．６（比較）とボール７（本発明）とを比べる
とボール７はボール４より柔らかく、またボール６より
硬いがフィーリングは両者より良好であった。これは、
ボール４．６は内核の硬度分布、特に表面部分の硬度が
高すぎるためで、その結果スピンも少なく、フィーリン
グも悪い結果となった。Comparing Ball 4.6 (comparison) and Ball 7 (invention), Ball 7 was softer than Ball 4 and harder than Ball 6, but had a better feel than both. this is,
The reason for the ball 4.6 was that the hardness distribution of the inner core, especially the hardness of the surface area, was too high, resulting in less spin and poor feel.
実施例■および比較例■
表−４の配合と加硫条件から内核を実施例Ｉと同様に得
、これにカバーをかぶせて、直径約４１゜３ｍｍのスモ
ールザイ′ズのツーピースポールを得た。Example ■ and Comparative Example ■ An inner core was obtained in the same manner as in Example I from the formulation and vulcanization conditions shown in Table 4, and a cover was placed on it to obtain a small size two-piece pole with a diameter of approximately 41°3 mm. .
その諸性性を表−４に示す。Its properties are shown in Table 4.
ボール８〜１１をみると適正な内核の硬度分布、カバー
厚み、カバー曲げ弾性率、ホール圧縮変形量を兼ねあわ
せたボールは、ボール初速が高く、インパクト時の接触
面積が大きく、このためスピンがよくかかり、打撃時の
フィーリングが良好であることがわかる。Looking at Balls 8 to 11, balls that have an appropriate inner core hardness distribution, cover thickness, cover bending elastic modulus, and hole compression deformation have a high initial velocity, a large contact area at impact, and therefore spin. It can be seen that the ball hits well and the feeling when hitting is good.
（発明の効果）
本発明によれば、ボールの初速度等のツーピースソリッ
ドゴルフボールの優れた特性は保持しつつ、スピン性能
を高め、アイアンショツト時のボールのコントロール性
を大きく改善した。(Effects of the Invention) According to the present invention, while maintaining the excellent characteristics of a two-piece solid golf ball such as the initial velocity of the ball, the spin performance is increased and the controllability of the ball during iron shots is greatly improved.
特許出願人 住友ゴム工業昧式会社
手続補正書（白色
特許庁 長官 殿 昭和６２年 ２ 月 ２５日
２、発明の名称
ツーピースソリッドゴルフボール
３ 補正をする者
事件との関係 特許出願人
名称 仕友ゴムエ；ｊ：ｆ’４ｇ式会肚代表者 仕
１ｕ 鎮 男
４、代理人
住所 〒５４０ 大阪府大阪市東区域見２丁目１番６１
号６、 補正の対象 明細書の「発明の詳細な説明」
の瀾７、補正の内容
（１）明細書第５頁下から第３〜２行、「Ｌ−プチルパ
ーオキザイド」とあろを、１−ノーｔ−プチルパーオキ
ザイド」に訂正する。Patent Applicant Sumitomo Rubber Industries Amended Form of Company Procedures (White Patent Office Commissioner, February 25, 1985 2, Title of Invention Two-Piece Solid Golf Ball 3 Relationship with the Case of the Person Who Makes the Amendment Patent Applicant Name Sumitomo Rubber Industries, Ltd.) ;j: f'4g ceremony representative
1u Shimano 4, Agent address: 2-1-61 Mi, Higashi District, Osaka City, Osaka Prefecture 540
Item 6. Subject of amendment “Detailed description of the invention” in the specification
7. Contents of the amendment (1) In the third to second lines from the bottom of page 5 of the specification, the words "L-butyl peroxide" are corrected to "1-note t-butyl peroxide."
以上that's all
Claims (1)
ールにおいて、該内核がＪＩＳ−Ｃ型硬度計で測定され
た表面硬度５５〜７５、表面層を除く断面硬度７５〜９
０を有し、該カバーが厚さ０．７〜２．２ｍｍ曲げ弾性
率３５００〜６０００ｋｇ／ｃｍ＾２を有し、かつツー
ピースソリッドゴルフボールが初荷重１０ｋｇから終荷
重１３０ｋｇかけた時の圧縮変形量が２．２〜３．０ｍ
ｍであることを特徴とするツーピースソリッドゴルフボ
ール。 ２、内核の表面硬度が６５〜７０である第１項記載のゴ
ルフボール。 ３、内核の断面硬度が８０〜８５である第１項記載のゴ
ルフボール。 ４、カバーの厚さが１．０〜２．０ｍｍである第１項記
載のゴルフボール。 ５、カバーの曲げ弾性率が４０００〜５０００ｋｇ／ｃ
ｍ＾２である第１項記載のゴルフボール。 ６、カバーの厚さが１．０〜１．７ｍｍ、カバーの曲げ
弾性率が４０００〜６０００ｋｇ／ｃｍ＾２を有し、か
つゴルフボールの圧縮変形量が２．２〜２．８ｍｍであ
る第１項記載のゴルフボール。 ７、圧縮変形量が２．３〜２．６ｍｍである第６項記載
のゴルフボール。 ８、カバーの厚さが１．３〜２．０ｍｍ、カバーの曲げ
弾性率３５００〜５０００ｋｇ／ｃｍ＾２を有し、かつ
ボールの圧縮変形量が２．３〜３．０ｍｍである第１項
記載のゴルフボール。 ９、圧縮変形ｍが２．４〜２．８ｍｍである第８項記載
のゴルフボール。[Claims] 1. A two-piece solid golf ball consisting of an inner core and a cover, wherein the inner core has a surface hardness of 55 to 75 as measured by a JIS-C type hardness meter, and a cross-sectional hardness of 75 to 9 excluding the surface layer.
0, the cover has a thickness of 0.7 to 2.2 mm, a flexural modulus of 3500 to 6000 kg/cm^2, and a two-piece solid golf ball has a compressive deformation when an initial load of 10 kg to a final load of 130 kg is applied. The amount is 2.2~3.0m
A two-piece solid golf ball characterized by a m. 2. The golf ball according to item 1, wherein the inner core has a surface hardness of 65 to 70. 3. The golf ball according to item 1, wherein the inner core has a cross-sectional hardness of 80 to 85. 4. The golf ball according to item 1, wherein the cover has a thickness of 1.0 to 2.0 mm. 5. The bending elastic modulus of the cover is 4000 to 5000 kg/c
The golf ball according to item 1, wherein m^2. 6. The thickness of the cover is 1.0 to 1.7 mm, the bending modulus of the cover is 4000 to 6000 kg/cm^2, and the amount of compressive deformation of the golf ball is 2.2 to 2.8 mm. The golf ball according to item 1. 7. The golf ball according to item 6, wherein the amount of compression deformation is 2.3 to 2.6 mm. 8. Item 1, wherein the thickness of the cover is 1.3 to 2.0 mm, the cover has a bending elastic modulus of 3500 to 5000 kg/cm^2, and the amount of compressive deformation of the ball is 2.3 to 3.0 mm. Golf ball as described. 9. The golf ball according to item 8, wherein the compression deformation m is 2.4 to 2.8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61220626A JPH064103B2 (en) | 1986-09-17 | 1986-09-17 | Two-piece solid golf ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61220626A JPH064103B2 (en) | 1986-09-17 | 1986-09-17 | Two-piece solid golf ball |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6373979A true JPS6373979A (en) | 1988-04-04 |
| JPH064103B2 JPH064103B2 (en) | 1994-01-19 |
Family
ID=16753921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61220626A Expired - Lifetime JPH064103B2 (en) | 1986-09-17 | 1986-09-17 | Two-piece solid golf ball |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064103B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04109971A (en) * | 1990-08-31 | 1992-04-10 | Bridgestone Corp | Solid golf ball |
| JPH06319830A (en) * | 1993-03-12 | 1994-11-22 | Bridgestone Sports Kk | Golf ball |
| JP2009034519A (en) * | 2007-08-01 | 2009-02-19 | Acushnet Co | Negative hardness gradient inner core for dual core golf ball |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53115330A (en) * | 1977-03-16 | 1978-10-07 | Hitachi Chem Co Ltd | Golf ball with coatings of ionomer resin |
| JPS5949779A (en) * | 1982-09-13 | 1984-03-22 | 住友ゴム工業株式会社 | Two-piece solid golf ball |
| JPS6060867A (en) * | 1983-09-13 | 1985-04-08 | 住友ゴム工業株式会社 | Golf ball |
| JPS6090575A (en) * | 1983-10-24 | 1985-05-21 | 住友ゴム工業株式会社 | Two-piece golf ball |
| JPS60163673A (en) * | 1984-02-07 | 1985-08-26 | 株式会社ブリヂストン | Solid golf ball |
| JPS60199471A (en) * | 1984-03-26 | 1985-10-08 | 住友ゴム工業株式会社 | Solid golf ball and its production |
-
1986
- 1986-09-17 JP JP61220626A patent/JPH064103B2/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53115330A (en) * | 1977-03-16 | 1978-10-07 | Hitachi Chem Co Ltd | Golf ball with coatings of ionomer resin |
| JPS5949779A (en) * | 1982-09-13 | 1984-03-22 | 住友ゴム工業株式会社 | Two-piece solid golf ball |
| JPS6060867A (en) * | 1983-09-13 | 1985-04-08 | 住友ゴム工業株式会社 | Golf ball |
| JPS6090575A (en) * | 1983-10-24 | 1985-05-21 | 住友ゴム工業株式会社 | Two-piece golf ball |
| JPS60163673A (en) * | 1984-02-07 | 1985-08-26 | 株式会社ブリヂストン | Solid golf ball |
| JPS60199471A (en) * | 1984-03-26 | 1985-10-08 | 住友ゴム工業株式会社 | Solid golf ball and its production |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04109971A (en) * | 1990-08-31 | 1992-04-10 | Bridgestone Corp | Solid golf ball |
| JPH06319830A (en) * | 1993-03-12 | 1994-11-22 | Bridgestone Sports Kk | Golf ball |
| JP2009034519A (en) * | 2007-08-01 | 2009-02-19 | Acushnet Co | Negative hardness gradient inner core for dual core golf ball |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH064103B2 (en) | 1994-01-19 |
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