JPH02140179A - Manufacture of solid golf ball - Google Patents
Manufacture of solid golf ballInfo
- Publication number
- JPH02140179A JPH02140179A JP1262570A JP26257089A JPH02140179A JP H02140179 A JPH02140179 A JP H02140179A JP 1262570 A JP1262570 A JP 1262570A JP 26257089 A JP26257089 A JP 26257089A JP H02140179 A JPH02140179 A JP H02140179A
- Authority
- JP
- Japan
- Prior art keywords
- hardness
- golf ball
- temperature
- heating
- solid
- 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 abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 230000020169 heat generation Effects 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 11
- 238000007731 hot pressing Methods 0.000 claims description 2
- 238000004073 vulcanization Methods 0.000 abstract description 25
- 239000002131 composite material Substances 0.000 abstract 2
- 239000006185 dispersion Substances 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 description 20
- 239000005060 rubber Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 15
- 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 6
- 238000009472 formulation Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 235000014692 zinc oxide Nutrition 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 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
- HGTUJZTUQFXBIH-UHFFFAOYSA-N (2,3-dimethyl-3-phenylbutan-2-yl)benzene Chemical group C=1C=CC=CC=1C(C)(C)C(C)(C)C1=CC=CC=C1 HGTUJZTUQFXBIH-UHFFFAOYSA-N 0.000 description 1
- 241000208340 Araliaceae Species 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- 229920003947 DuPont™ Surlyn® 1707 Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】 本発明はソリッドゴルフボールの製法に関する。[Detailed description of the invention] The present invention relates to a method for manufacturing solid golf balls.
［発明の目的］
耐クラツク性が高く、かつ高い反撥係数のゴルフボール
を得ることを目的とする。[Object of the Invention] An object of the invention is to obtain a golf ball with high crack resistance and a high coefficient of restitution.
［従来の技術］
ワンピースソリッドゴルフボールまたはツーピースゴル
フボールのソリッド内核を硬化させるに当り高温で長時
間処理すると、熱劣化により耐クラツク性が低下する。[Prior Art] When the solid inner core of a one-piece solid golf ball or a two-piece golf ball is treated at high temperature for a long time to harden it, the crack resistance decreases due to thermal deterioration.
加硫温度を低くすると、長時間加硫してもソリッドゴル
フボールの内核の温度の上昇が小さく、所望のボール硬
さを得ることができない。If the vulcanization temperature is lowered, the temperature increase in the inner core of the solid golf ball will be small even after long vulcanization, making it impossible to obtain the desired ball hardness.
上記の問題を解決するために、加硫温度を一定の条件下
で除々に上げ、高温加硫時間を短縮させ、熱劣化を制御
する方法が提案されている（特開昭５３−５６２７３号
公報）。In order to solve the above problems, a method has been proposed in which the vulcanization temperature is gradually raised under certain conditions, the high temperature vulcanization time is shortened, and thermal deterioration is controlled (Japanese Unexamined Patent Publication No. 53-56273). ).
この方法は、ソリッドゴルフボール用ゴム組成物の硬化
に使用する触媒の半分が分解するのに１０時間を要する
温度から、その分解に１分を要する温度よりほぼ１０℃
低い温度まで、昇温速度５〜ｌＯ°Ｃ／分で加熱硬化さ
せるソリッドゴルフボ−ルの成形方法であるが、この昇
温速度はソリッドゴルフボール内部への伝熱速度を考慮
する時、著しく速いものであり、ソリッドゴムの中心部
の温度が十分上昇しきれないうちに加熱処理が終了する
こととなる。例えば、上記方法でジクミルパーオキサイ
ドを触媒として用いるとすると、ジクミルパーオキサイ
ドの半分が分解するのに１０〜１５時間を要する温度は
１１７℃であり、分解に１分を要する温度は１７１’Ｃ
であるから、それより１０℃低い温度まで昇温速度５〜
ＩＯ’Ｃ／分で加勢硬化するに要する時間は８．８〜４
．４分である。一方、本発明者の測定結果では直径４１
．８ｍｍのワンピースゴルフボール用ゴム組成物ヲ１６
０℃に予熱したプレスに入れて、中心部の温度が１６０
℃になるのに要する時間は、約１０分である。結果とし
て、特開昭５３−５６２７３号公報に記載の方法では、
内部が所望の硬さまで硬化するには至らない。また、最
高温度でさらに加熱を継続し内部硬化を促進しても、硬
度分布の幅は広くなり、耐クラツク性は改良されない。This method is approximately 10°C lower than the temperature at which half of the catalyst used to cure the solid golf ball rubber composition takes 10 hours to decompose, and the temperature at which it takes 1 minute to decompose.
This is a solid golf ball molding method that heats and hardens the solid golf ball to a low temperature at a temperature increase rate of 5 to 10°C/min, but this temperature increase rate is extremely fast when considering the rate of heat transfer to the inside of the solid golf ball. Therefore, the heat treatment ends before the temperature at the center of the solid rubber can rise sufficiently. For example, if dicumyl peroxide is used as a catalyst in the above method, the temperature at which it takes 10 to 15 hours to decompose half of the dicumyl peroxide is 117°C, and the temperature at which it takes 1 minute to decompose is 171' C
Therefore, the heating rate is 5~ to a temperature 10℃ lower than that.
The time required for force curing at IO'C/min is 8.8-4
．． It is 4 minutes. On the other hand, the inventor's measurement results show that the diameter is 41
．． Rubber composition for 8mm one-piece golf ball 16
Place it in a press preheated to 0°C until the temperature at the center reaches 160°C.
The time required to reach the temperature is approximately 10 minutes. As a result, in the method described in JP-A-53-56273,
The inside cannot be hardened to the desired hardness. Furthermore, even if heating is continued at the maximum temperature to promote internal hardening, the hardness distribution becomes wider and the crack resistance is not improved.
耐りラッフボールの製法を提供する。To provide a manufacturing method for durable rough balls.
本発明により得られるソリッドゴルフボールは、ワンピ
ースゴルフボールおよびツーピースゴルフボールの両方
を含む。ツーピースゴルフボールでは、そのソリッド内
核が上記の硬度を有するようにする。ツーピースゴルフ
ボールのソリッド内核は、スモールサイズで直径約３６
〜３８ｍｍ、ラージサイズで約３７〜３９ｍｍおよびワ
ンピースゴルフボールでは、直径約４１〜４３ｍｍであ
る。いずれのボールに対しても本発明方法を適用するこ
とができる。Solid golf balls obtained according to the present invention include both one-piece and two-piece golf balls. In a two-piece golf ball, the solid inner core should have the hardness described above. The solid inner core of a two-piece golf ball is small and approximately 36 mm in diameter.
~38 mm, approximately 37-39 mm in large size and approximately 41-43 mm in diameter for one-piece golf balls. The method of the present invention can be applied to any ball.
ゴルフボール用基材ゴムは、従来一般に使用されている
ゴム、例えば、９８％−シスポリブタジェンゴム、天然
ゴム、スチレンブタジェンゴム、合成ポリイソプレンゴ
ム、いずれをも使用し得るが、特に、９８％−シスポリ
ブタジェンゴムが好ましい。The base rubber for golf balls may be any conventionally used rubber, such as 98%-cis polybutadiene rubber, natural rubber, styrene-butadiene rubber, or synthetic polyisoprene rubber, but in particular, 98%-cis polybutadiene rubber is preferred.
ソ′リッドゴム用配合組成は従来一般に使用されている
もの、例えば共架橋剤（メタクリル酸、アクリル酸等の
金属塩）、ジクミルパーオキサイドク性やゴルフボール
特性に影響を与える１つの因子として、ソリッドゴルフ
ボール（ツーピースゴルフボールにおいては、内核のゴ
ム硬度の分布）がある。特に、耐クラツク性の点で硬度
分布はできるだけ均一なものが良い。The compounding composition for solid rubber is one that has been commonly used in the past, such as co-crosslinking agents (metal salts such as methacrylic acid and acrylic acid), dicumyl peroxide, which is one of the factors that affect the ductility and golf ball properties. There are solid golf balls (in two-piece golf balls, the distribution of rubber hardness in the inner core). In particular, from the viewpoint of crack resistance, the hardness distribution should be as uniform as possible.
市販ソリッドゴルフボールの硬度分布を実際に測定する
と、表面部が最も硬く、ＪＣ硬度計で７５〜８３の間に
あり、中心部はど柔らかく、約６０〜７２の間にある。When the hardness distribution of a commercially available solid golf ball is actually measured, the surface portion is the hardest, ranging from 75 to 83 on the JC hardness scale, and the center portion is the softest, ranging from about 60 to 72.
［発明の着想］
本発明者は耐クラツク性を向上させるため、加熱温度と
時間を調整し、ゴム内部で生ずる暴走反応をコントロー
ルし、ソリッドゴルフボールの外部表面および内部の硬
度のバラツキを制御することを試みた。[Concept of the invention] In order to improve crack resistance, the present inventor adjusted the heating temperature and time, controlled the runaway reaction that occurs inside the rubber, and controlled the variation in hardness on the external surface and inside of the solid golf ball. I tried that.
［発明の構成］
本発明はワンピースソリッドゴルフボールまたはツーピ
ースゴルフボールのソリッド内核の硬度が、ＪＣ硬度計
で７５〜８５の範囲にあり、任意の部分の硬度差が５以
下に調節したソリッドゴム等の開始剤、老化防止剤（ヒ
ンダードフェノール類）等を適宜に配合したものであっ
てよい。[Structure of the Invention] The present invention provides a solid rubber or the like in which the hardness of the solid inner core of a one-piece solid golf ball or two-piece golf ball is in the range of 75 to 85 on the JC hardness scale, and the hardness difference in any part is adjusted to 5 or less. Initiators, anti-aging agents (hindered phenols), etc. may be appropriately blended.
本発明により、ソリッドゴルフボールを製造するには、
ワンピースソリッドゴルフボールまたはツーピースゴル
フボールのソリッド内核用組成物を、内部発熱による中
心部の温度上昇ピークが加熱開始から２０分以上経過し
て現れる加熱温度で、２０分以上加熱し、中心部の硬度
がＪＣ硬度計で７５以上にし、次いでその温度またはそ
れより高い温度で、表面部分の硬度がＪＣ硬度計で７５
〜８５になるよう加熱を継続することにより行う。To produce a solid golf ball according to the present invention,
The composition for the solid inner core of a one-piece solid golf ball or a two-piece golf ball is heated for 20 minutes or more at a heating temperature at which the temperature rise peak in the center due to internal heat generation appears 20 minutes or more after the start of heating, and the hardness of the center is determined. 75 or higher on the JC hardness tester, and then at that temperature or higher, the hardness of the surface portion becomes 75 on the JC hardness tester.
This is done by continuing heating until the temperature reaches ~85.
高温加硫と低温加硫によるゴム内部の温度と加熱時間と
を参考図１と２に示す。参考図３はそのゴム内部の測定
位置を示す。Reference figures 1 and 2 show the temperature inside the rubber and the heating time during high-temperature vulcanization and low-temperature vulcanization. Reference Figure 3 shows the measurement position inside the rubber.
参考図１は、高温加硫であり、ゴム中心部では暴走反応
による著しい温度上昇を生ずる。その結果、ゴム内部で
は発熱が急激におこり熱劣化を生ずる。参考図２は、低
温加硫を示し、ゴム中心部でも暴走反応を生じないため
、ゴム内部において充分な硬化が達成されず、満足すべ
き硬度は得られない。図中、（ａ）、（ｂ）および（ｃ
）は参考図３のゴム（１）に示す位置（ａ）、（ｂ）お
よび（ｃ）に対応している。（２）は加熱プレス、（３
）はサーモジャンクションを示す。Reference Figure 1 shows high-temperature vulcanization, and a significant temperature rise occurs in the center of the rubber due to a runaway reaction. As a result, heat generation rapidly occurs inside the rubber, causing thermal deterioration. Reference FIG. 2 shows low-temperature vulcanization and no runaway reaction occurs even in the center of the rubber, so sufficient curing is not achieved inside the rubber and satisfactory hardness cannot be obtained. In the figure, (a), (b) and (c
) correspond to positions (a), (b) and (c) shown in rubber (1) of Reference FIG. 3. (2) is a heated press, (3
) indicates a thermojunction.
本発明方法においては、中心部（ａ）における発熱のピ
ークが加熱プレス開始から２０分以上経過して現れる加
熱温度で、ソリッドゴム組成物を２０分以上加熱して、
中心部の硬度をＪＩＣ硬度計で７５以上にする。さらに
、その温度で、またはそれより高い温度で加熱を継続し
、表面部分の硬度を７５〜８５まで上げる。この方法を
とることにより、得られたソリッドゴルフボール、また
はソリッド内核の硬度は７５〜８５の範囲になり、かつ
任意の部分の硬度差が５以下となる。内部発熱による中
心部の温度ピークが加熱開始から２０分以内に生ずるよ
うな温度で加硫する場合は、内部発熱が急激に起こりや
すく、熱劣化を生じ易い。In the method of the present invention, the solid rubber composition is heated for 20 minutes or more at a heating temperature at which the exothermic peak in the center (a) appears 20 minutes or more after the start of hot pressing,
The hardness of the center should be 75 or higher on the JIC hardness tester. Further heating is continued at that temperature or higher to increase the hardness of the surface portion to 75-85. By using this method, the hardness of the obtained solid golf ball or solid inner core will be in the range of 75 to 85, and the hardness difference in any part will be 5 or less. When vulcanizing is carried out at a temperature such that a temperature peak at the center due to internal heat generation occurs within 20 minutes from the start of heating, internal heat generation is likely to occur rapidly and thermal deterioration is likely to occur.
また、加熱温度が２０分より短い時は、内部加硫が不充
分となる。Moreover, when the heating temperature is shorter than 20 minutes, internal vulcanization becomes insufficient.
着定反応をより効果的に制御するには、メタクリル酸、
アクリル酸等、またはその金属塩や、ジクミルパーオキ
サイド等の開始剤およびヒンダードフェノール類等をラ
ジカル補足剤として適当に配合することが好ましい。To control the fixation reaction more effectively, methacrylic acid,
It is preferable to appropriately blend acrylic acid or a metal salt thereof, an initiator such as dicumyl peroxide, hindered phenols, etc. as a radical scavenger.
得られたソリッドゴルフボールまたはソリッド内核の硬
度は、ＪＣ硬度計で７５〜８５、好ましくは７７〜８２
の間に調整する。硬度が７５より小さいと、反撥弾性が
低く好ましくない。また８５より大きいと、耐クラツク
性が劣るため好ましくない。The hardness of the obtained solid golf ball or solid inner core is 75 to 85, preferably 77 to 82 on the JC hardness scale.
Adjust between. If the hardness is less than 75, the impact resilience is low, which is not preferable. Moreover, if it is larger than 85, the crack resistance will be poor, which is not preferable.
耐クラツク性を向上するためには、ソリッドゴルフボー
ルまたはソリッド内核の任意の位置での硬度のバラツキ
幅は５以下、特に好ましくは３以下にしなければならな
い。硬度のバラツキ幅が５より大きいと、加硫中に内部
が残り、耐クラツク性が良くない。In order to improve crack resistance, the width of variation in hardness at any position of the solid golf ball or solid inner core must be 5 or less, particularly preferably 3 or less. If the hardness variation width is larger than 5, the inside will remain during vulcanization, resulting in poor crack resistance.
以下、実施例および比較例をあげて本発明を説明する。The present invention will be explained below with reference to Examples and Comparative Examples.
実施例１および比較例１〜６
以下の処方および条件でツーピースゴルフボール
ルのソリッド内核（直径的３７ 、１ ｍｍ）を製造し
た。Example 1 and Comparative Examples 1 to 6 A solid inner core (diameter: 37 mm, 1 mm) of a two-piece golf ball was manufactured using the following recipe and conditions.
蚊友 藍１紺ＪＳＲＢＲＯ
Ｉ １００アクリル酸亜鉛
３５亜鉛華
５２ジクミルパーオキサイド
１．２ヨシソツクス４２５ ’
０．５ヨシソックス４２５： ２，２°゛−メチ
レンビス−（４−エチル−６−ｔ−ブチルフェノール）
（ただし、比較例６の場合はジクミルパーオキサイドに
代えて１．１−ジ−ｔ−ブチルパーオキシ−３゜３．５
−）リメチルシクロヘキサンを１，２重量部用いる。）
以上の組成のゴム組成物を、表−１に示す加硫条件下で
加硫した。これをサーリン １７０７１００重量部およ
び酸化チタン２重量部からなるカバー用組成物で被覆し
た。得られたツーピースゴルフボールの物性を同じく表
−１に示す。Mosquito friend indigo 1 navy blue JSRBRO
I 100 Zinc Acrylate
35 zinc white
52 dicumyl peroxide
1.2 Yoshi Socks 425'
0.5 Yoshisox 425: 2,2°゛-methylenebis-(4-ethyl-6-t-butylphenol)
(However, in the case of Comparative Example 6, 1.1-di-t-butylperoxy-3°3.5
-) Use 1.2 parts by weight of remethylcyclohexane. ) The rubber composition having the above composition was vulcanized under the vulcanization conditions shown in Table 1. This was coated with a cover composition consisting of 100 parts by weight of Surlyn 1707 and 2 parts by weight of titanium oxide. The physical properties of the two-piece golf ball obtained are also shown in Table 1.
実施例１と同じ処方を用い、加硫条件を代える以外、実
施例１と同様にしてツーピースゴルフボ−ルを製造した
。得られたツーピースゴルフボールの物性を比較例１〜
６として同じく表−１に示す。A two-piece golf ball was produced in the same manner as in Example 1, except that the same formulation as in Example 1 was used and the vulcanization conditions were changed. The physical properties of the obtained two-piece golf balls were as follows from Comparative Examples 1 to 1.
6 is also shown in Table 1.
実施例２
以下の処方でツーピースゴルフボール用ソリッド内核（
直径的３７ 、１ ｍｍ）を配合した。Example 2 A solid inner core for a two-piece golf ball (
A diameter of 37.1 mm) was blended.
敷Ｕ 重量部ＪＳＲＢＲ
ＯＩ １００メタクリル酸
２０亜鉛華
５７ジクミルバーオキサイド
１．２力バー配合処方は実施例１と同様にし
て、表１に示す加硫条件下に加硫した。得られたツーピ
ースゴルフボール物性を表−１に示す。Layout U Weight part JSRBR
OI 100 methacrylic acid 20 zinc white
57 dicumyl baroxide
The 1.2-force bar formulation was the same as in Example 1, and vulcanization was carried out under the vulcanization conditions shown in Table 1. Table 1 shows the physical properties of the two-piece golf ball obtained.
同じ処方を用い、加硫条件を代える以外、実施例と同様
にしてツーピースゴルフボールを製造し、これを比較例
７として同じく表−１に示す。A two-piece golf ball was manufactured in the same manner as in the example except that the same formulation was used and the vulcanization conditions were changed, and this is also shown in Table 1 as Comparative Example 7.
実施例１は比較例１〜６に比べて、硬度分布が均一であ
る。これは、配合に適した加硫速度にて加硫しているた
めで、耐クラツク性、反撥係数も他と比べて最も高いも
のであった。Example 1 has a more uniform hardness distribution than Comparative Examples 1 to 6. This is because vulcanization was performed at a vulcanization rate suitable for the formulation, and the crack resistance and repulsion coefficient were also the highest compared to the others.
比較例１は通常の加硫方法であり、硬度差も大きく、市
販品の多くはこのタイプである。この様な硬度の不均一
なものは、耐クラツク性お上反撥係数が低い。Comparative Example 1 uses a normal vulcanization method, and the difference in hardness is large, and many commercially available products are of this type. Materials with such non-uniform hardness have low crack resistance and low repulsion coefficient.
比較例２および３は、やや加硫速度を遅くしたもので、
比較例１に比べると耐クラツク性の向上は認められるが
不十分である。Comparative Examples 2 and 3 had a slightly slower vulcanization rate,
Although an improvement in crack resistance is observed compared to Comparative Example 1, it is insufficient.
比較例４は、実施例１と同様の加硫速度であるが、表面
部分の硬度が不足し、耐クラツク性、反撥係数共に低い
。Comparative Example 4 had the same vulcanization rate as Example 1, but the hardness of the surface portion was insufficient, and both the crack resistance and the coefficient of restitution were low.
比較例５は、昇温加硫を試みたものであるが、好ましい
結果は得られなかった。In Comparative Example 5, elevated temperature vulcanization was attempted, but favorable results were not obtained.
比較例６は、１０時間半減期の温度の低い開始剤を用い
た結果であるが、加硫速度が速く、プレス温度を下げて
加硫したメリットが認められない。Comparative Example 6 is a result of using a low-temperature initiator with a half-life of 10 hours, but the vulcanization rate is fast, and the merits of vulcanization at a lower press temperature cannot be recognized.
実施例２は、実施例１とは異なった配合の組成を用いて
、均一加硫を行った例である。Example 2 is an example in which uniform vulcanization was performed using a different composition from Example 1.
比較例７は実施例２と同じ処方で調整したものであるが
、実施例２に比べ耐クラツク性、反撥弾性共に劣ってい
る。Comparative Example 7 was prepared using the same formulation as Example 2, but was inferior to Example 2 in both crack resistance and impact resilience.
実施例３
上記ゴルフボールを用いて、１０人のプロによる実射テ
ストをおこなったところ、実施例１のボールは比較例１
〜６のボールに比べて、平均２〜５ｍよく飛ぶことが確
認された。また打撃感触が良く、澄んだ良い音がする点
において実射テスト者の感想が一致した。これはソリッ
ド内核芯の均一性に基づくものと考えられる。Example 3 Using the above golf ball, a live shooting test was conducted by 10 professionals, and it was found that the ball of Example 1 was the same as Comparative Example 1.
It was confirmed that the ball traveled an average of 2 to 5 meters better than the balls of 6 to 6. In addition, the impressions of actual firing testers were unanimous in that it felt good when hit and had a clear, good sound. This is considered to be based on the uniformity of the solid core.
実施例４〜６および比較例８〜１０
以下の処方および表−２の条件でラージサイズツーピー
スゴルフボールのソリッド内核（直径的３８．４ｍｍ）
を製造した。Examples 4 to 6 and Comparative Examples 8 to 10 A solid inner core (38.4 mm in diameter) of a large size two-piece golf ball using the following formulation and the conditions shown in Table 2.
was manufactured.
蜂参 重量部ＪＳＲＢＲ
ＯＩ １００アクリ
ル酸亜鉛 ３３亜鉛華
１８ジクミルパーオキサイド
２゜ヨシソックス ４２５
０．５以上の組成のゴム組成物をザーリン１
７０７１００重量部および酸化チタン２重量部からなる
カバー用組成物で被覆した。Bee ginseng weight part JSRBR
OI 100 Zinc acrylate 33 Zinc white
18 dicumyl peroxide 2° reed socks 425
A rubber composition with a composition of 0.5 or more is ZARLIN 1
It was coated with a cover composition consisting of 100 parts by weight of 707 and 2 parts by weight of titanium oxide.
得られたツーピースゴルフボールの物性を表２に示す。Table 2 shows the physical properties of the two-piece golf ball obtained.
Claims (1)
ゴルフボールのソリッド内核用組成物を内部発熱による
中心部の温度上昇ピークが加熱プレス開始から２０分以
上経過して現れる加熱温度で２０分以上加熱し、中心部
の硬度がＪＣ硬度計で７５以上とし、次いでその温度ま
たはそれより高い温度で表面部分の硬度もＪＣ硬度計で
７５〜８５になるように加熱を継続する、硬度がＪＣ硬
度計で７５〜８５の範囲にあり、任意の部分の硬度差が
５以下であるソリッドゴルフボールの製造法。 ２、ワンピースソリッドゴルフボールまたはツーピース
ゴルフボールのソリッド内核の硬度がＪＣ硬度計で７７
〜８２の範囲にある第１項記載の製法。[Claims] 1. The composition for the solid inner core of a one-piece solid golf ball or a two-piece golf ball is heated for 20 minutes or more at a temperature at which the peak temperature increase in the center due to internal heat generation appears 20 minutes or more after the start of hot pressing. Heat until the hardness of the center part is 75 or higher on the JC hardness scale, and then continue heating until the hardness of the surface part is 75 to 85 on the JC hardness scale at that temperature or higher. A method for producing a solid golf ball having a total hardness in the range of 75 to 85 and a hardness difference of 5 or less at any part. 2. The hardness of the solid inner core of the one-piece solid golf ball or two-piece golf ball is 77 on the JC hardness scale.
The method according to item 1, which is in the range of .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1262570A JPH02140179A (en) | 1989-10-06 | 1989-10-06 | Manufacture of solid golf ball |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1262570A JPH02140179A (en) | 1989-10-06 | 1989-10-06 | Manufacture of solid golf ball |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59058869A Division JPS60199471A (en) | 1984-03-26 | 1984-03-26 | Solid golf ball and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02140179A true JPH02140179A (en) | 1990-05-29 |
| JPH0351432B2 JPH0351432B2 (en) | 1991-08-06 |
Family
ID=17377639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1262570A Granted JPH02140179A (en) | 1989-10-06 | 1989-10-06 | Manufacture of solid golf ball |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02140179A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07112036A (en) * | 1993-10-15 | 1995-05-02 | Sumitomo Rubber Ind Ltd | Two-piece golf ball |
| JP2009034518A (en) * | 2007-08-01 | 2009-02-19 | Acushnet Co | Negative hardness gradient outer core layer for dual core golf ball |
| WO2013101579A1 (en) * | 2011-12-27 | 2013-07-04 | Nike International Ltd. | Golf ball with configurable materials and method of post production modification |
| US9333393B2 (en) | 2011-12-30 | 2016-05-10 | Nike, Inc. | Method of making a golf ball core |
-
1989
- 1989-10-06 JP JP1262570A patent/JPH02140179A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07112036A (en) * | 1993-10-15 | 1995-05-02 | Sumitomo Rubber Ind Ltd | Two-piece golf ball |
| JP2009034518A (en) * | 2007-08-01 | 2009-02-19 | Acushnet Co | Negative hardness gradient outer core layer for dual core golf ball |
| WO2013101579A1 (en) * | 2011-12-27 | 2013-07-04 | Nike International Ltd. | Golf ball with configurable materials and method of post production modification |
| US9457240B2 (en) | 2011-12-27 | 2016-10-04 | Nike, Inc. | Golf ball with configurable materials and method of post production modification |
| US9333393B2 (en) | 2011-12-30 | 2016-05-10 | Nike, Inc. | Method of making a golf ball core |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351432B2 (en) | 1991-08-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |