JPH10328326A - Multi-piece sold golf ball - Google Patents

Multi-piece sold golf ball

Info

Publication number
JPH10328326A
JPH10328326A JP9155811A JP15581197A JPH10328326A JP H10328326 A JPH10328326 A JP H10328326A JP 9155811 A JP9155811 A JP 9155811A JP 15581197 A JP15581197 A JP 15581197A JP H10328326 A JPH10328326 A JP H10328326A
Authority
JP
Japan
Prior art keywords
hardness
layer
core
ball
cover
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
Application number
JP9155811A
Other languages
Japanese (ja)
Other versions
JP3985107B2 (en
Inventor
Junji Hayashi
淳二 林
Hisashi Yamagishi
久 山岸
Hiroshi Higuchi
博士 樋口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Sports Co Ltd
Original Assignee
Bridgestone Sports Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bridgestone Sports Co Ltd filed Critical Bridgestone Sports Co Ltd
Priority to JP15581197A priority Critical patent/JP3985107B2/en
Priority to US09/086,493 priority patent/US6468169B1/en
Publication of JPH10328326A publication Critical patent/JPH10328326A/en
Application granted granted Critical
Publication of JP3985107B2 publication Critical patent/JP3985107B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a favorable shooting feeling at the time of a full shot by a driver, regardless of a degree of the head speed while keeping a high repulsion, and at the same time, provide an excellent spinning performance at the time of an approach shot by a sandwedge, etc., and an excellent shooting feeling at the times of an approach shot and a putting. SOLUTION: For this multi-piece solid golf ball wherein a core 2 comprises an inner core ball 3 and a surrounding layer 4 which covers the inner core ball 3, and a cover 5 which covers the core 2 comprises an external layer and an internal layer, the external layer hardness of the cover 5 is 40-60 by a Shore D, and the internal layer hardness of the cover 5 is 55-70 by the Shore D, and the surface hardness of the surrounding layer is higher than the surface hardness of the inner core ball by the Shore D, and the hardness of the inner core ball 3 is 3.0-8.0 mm by a deformation amount when a load of 100 kg is loaded, and a ratio of the inner code ball hardness A and the ball hardness B is 1.1<=A/B<=3.5 by a deformation amount when a load of 100 kg is loaded.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、コアが内芯球と該
内芯球を被覆する包囲層からなり、このコアを被覆する
カバーが外層と内層からなる4層構造のマルチピースソ
リッドゴルフボールに関し、更に詳述すると、サンドウ
ェッジ等でのアプローチショット時におけるスピン性能
に優れ、アプローチショット、パッティング時における
打感がソフトであると共に、ドライバーでのフルショッ
ト時におけるヘッドスピードの高低にかかわらず飛距離
が増大し、軟らかい良好な打感を有するマルチピースソ
リッドゴルフボールに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer solid golf ball having a four-layer structure in which a core comprises an inner sphere and an envelope layer for covering the inner sphere, and a cover for covering the core comprises an outer layer and an inner layer. More specifically, it has excellent spin performance on approach shots with sand wedges, etc., has a soft hit feeling when approaching and putting, and fly regardless of the head speed during full shots with the driver. The present invention relates to a multi-piece solid golf ball that has an increased distance and is soft and has a good hit feeling.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来、
ゴムを基材とするコアをアイオノマー樹脂等からなるカ
バーで被覆したツーピースソリッドゴルフボールは優れ
た飛び性能及び耐久性を有するものの打感が硬いという
欠点がある。このため軟らかいタイプのツーピースソリ
ッドゴルフボールが種々提案されている。このような軟
らかいタイプのツーピースソリッドゴルフボールを得る
ためには、一般に軟らかいコアを用いることになるが、
コアを軟らかくすると、反発性が低下して飛び性能が劣
化すると共に、耐久性も著しく低下し、ツーピースソリ
ッドゴルフボールの特徴である優れた飛び性能及び耐久
性が得られないばかりでなく、実際の使用に耐え難くな
ってしまう場合もある。
2. Description of the Related Art
A two-piece solid golf ball in which a rubber-based core is covered with a cover made of an ionomer resin or the like has excellent flight performance and durability, but has a disadvantage in that the hit feeling is hard. For this reason, various soft two-piece solid golf balls have been proposed. In order to obtain such a soft type two-piece solid golf ball, a soft core is generally used,
When the core is softened, the resilience is reduced, the flying performance is deteriorated, and the durability is also significantly reduced. Not only the excellent flying performance and durability characteristic of the two-piece solid golf ball are not obtained, but also the actual It may be difficult to use.

【0003】このため、多くのスリーピースソリッドゴ
ルフボールが提案されている。例えば、内層と外層か
らなる芯を外皮で被覆したソリッドスリーピースゴルフ
ボールにおいて、軟らかく、比較的小さい内層(外径:
24〜29mm、硬度:ショアD15〜30)を硬い外
層(外径:36〜41mm、硬度:ショアD55〜6
5)で被覆した芯を有し、大きな飛距離と糸巻きゴルフ
ボールに極めて近い打撃感およびコントロール性を有す
るもの(特公平4−55077号公報、特開昭64−8
0377号公報)、センターコアと、中間層と、カバ
ーとからなるスリーピースソリッドゴルフボールにおい
て、軟らかく形成したセンターコアの外周に軟らかい中
間層を設け、これらセンターコア、中間層、カバーの厚
さ、比重を特定の範囲に設定することにより、飛び性
能、耐久性を劣化させることなくフィーリングの向上を
図ったもの(特開平7−24084号公報)、センタ
ーコアと、中間層と、カバーとからなるスリーピースソ
リッドゴルフボールにおいて、比較的軟らかいコアとカ
バーとの間に比較的硬い中間層を形成し、飛び性能及び
耐久性を劣化させることなく、良好なフィーリング、コ
ントロール性の向上を図ったもの(特開平7−2408
5号公報)などが試みられている。
[0003] For this reason, many three-piece solid golf balls have been proposed. For example, in a solid three-piece golf ball in which a core composed of an inner layer and an outer layer is covered with an outer skin, a soft, relatively small inner layer (outer diameter:
24-29 mm, hardness: Shore D15-30) hard outer layer (outer diameter: 36-41 mm, hardness: Shore D55-6)
5) having a core covered with 5) and having a great flight distance, a feeling of impact extremely close to a thread-wound golf ball, and controllability (Japanese Patent Publication No. 4-55077, JP-A-64-8)
No. 0377), in a three-piece solid golf ball comprising a center core, an intermediate layer, and a cover, a soft intermediate layer is provided around the softly formed center core, and the thickness, specific gravity of the center core, the intermediate layer, and the cover are provided. Is set in a specific range to improve the feeling without deteriorating the flight performance and durability (Japanese Patent Laid-Open No. 7-24084), and includes a center core, an intermediate layer, and a cover. In a three-piece solid golf ball, a relatively hard intermediate layer is formed between a relatively soft core and a cover to improve the feeling and controllability without deteriorating flying performance and durability ( JP-A-7-2408
No. 5) has been attempted.

【0004】しかしながら、は、カバーに関する規定
はされていないが、カバーに軟らかい部材を用いた場合
は反発性が十分ではなく飛距離がでない。一方カバーに
硬い部材を用いた場合はカバーとその内側のコア外層が
硬いため、特に小変形領域であるアプローチショット時
の打感が硬くなる。は、軟らかいコア、中間層により
ドライバーでの打感は良好となるが、カバーが硬いため
にサンドウェッジでの打感が硬くなり、十分にスピンが
かからずコントロール性に劣るものである。は、打
感、反発性に最も影響のあるコアが比較的軟らかく形成
され、打感が十分に軟らかい範囲では反発が不十分とな
り、飛距離がでない。一方反発性が十分な範囲ではコア
がやや硬めとなり打感が十分に軟らかくない上に、中間
層も硬いために、特に低ヘッドスピードのプレーヤーで
はボールに十分な変形を与えることができず、飛距離が
十分に得られない、という問題点をそれぞれ有してお
り、未だ改良の余地を残していた。
[0004] However, although there is no regulation regarding the cover, when a soft member is used for the cover, the resilience is not sufficient and the flight distance is short. On the other hand, when a hard member is used for the cover, since the cover and the core outer layer inside the cover are hard, the hit feeling during an approach shot, which is a small deformation region, is particularly hard. The soft core and the intermediate layer improve the hit feeling with a driver, but the cover is hard, so that the hit feeling with a sand wedge is hard, and the spin is not sufficiently applied and controllability is poor. In the case of the core, the core most affecting the feel and resilience is formed relatively soft, and in the range where the feel is sufficiently soft, the resilience becomes insufficient and the flight distance is short. On the other hand, if the resilience is in a sufficient range, the core is slightly hard and the hit feeling is not sufficiently soft, and the middle layer is also hard, so that a player with a low head speed cannot give sufficient deformation to the ball, and Each of them has a problem that a sufficient distance cannot be obtained, and there is still room for improvement.

【0005】本発明は、上記事情に鑑みなされたもの
で、コアが内芯球と該内芯球を被覆する包囲層からな
り、このコアを被覆するカバーが外層と内層からなるマ
ルチピースソリッドゴルフボールにおいて、サンドウェ
ッジ等でのアプローチショット時におけるスピン性能に
優れ、アプローチショット、パッティング時における打
感がソフトであると共に、ドライバーでのフルショット
時におけるヘッドスピードの高低にかかわらず飛距離が
増大し、軟らかい良好な打感を有するマルチピースソリ
ッドゴルフボールを提供することを目的とする。
The present invention has been made in view of the above circumstances, and a multi-piece solid golf having a core comprising an inner sphere and an envelope layer covering the inner sphere, and a cover covering the core comprising an outer layer and an inner layer. The ball has excellent spin performance when approaching shots with a sand wedge, etc., has a soft feel when approaching and putting, and increases the flight distance regardless of the head speed when driving with a full shot. It is an object of the present invention to provide a soft multi-piece solid golf ball having a good hit feeling.

【0006】[0006]

【課題を解決するための手段及び発明の実施の形態】本
発明者は、上記目的を達成するために鋭意検討を重ねた
結果、コアが内芯球と該内芯球を被覆する包囲層からな
り、このコアを被覆するカバーが外層と内層からなるマ
ルチピースソリッドゴルフボールにおいて、軟らかい内
芯球と比較的硬い包囲層とからなるコアを、軟らかい外
層と硬い内層とからなるカバーで被覆した4層構造に形
成することにより、軟らかく形成されたカバーの外層
によりサンドウェッジ等でのアプローチショット時にお
けるスピン性能が向上すると共に、アプローチショッ
ト、パッティング時の打感がソフトになること、カバ
ーの内層に硬く、反発性の良い樹脂を用いることにより
飛び性能を良好に保つことができること、内芯球を軟
らかく形成し、その周りに比較的硬く、反発性の良い部
材からなる包囲層を被覆することにより、ドライバーで
のフルショット時におけるヘッドスピードの高低にかか
わらず、高反発性を保ちつつ、非常に軟らかい打感が得
られること、をそれぞれ知見した。
Means for Solving the Problems and Embodiments of the Invention The present inventor has conducted intensive studies to achieve the above object, and as a result, the core was formed from the inner core sphere and the surrounding layer covering the inner sphere. In a multi-piece solid golf ball in which a cover covering the core is composed of an outer layer and an inner layer, a core composed of a soft inner core ball and a relatively hard surrounding layer is covered with a cover composed of a soft outer layer and a hard inner layer. By forming a layered structure, the soft outer layer of the cover improves the spin performance at the time of approach shot with sand wedge etc., and the hit feeling at the time of approach shot and putting becomes soft, and the inner layer of the cover By using hard and good resilience resin, good flight performance can be maintained, and the inner core ball is formed softly, By covering the surrounding layer made of a relatively hard and highly resilient member, a very soft feel can be obtained while maintaining high resilience regardless of the head speed during a full shot with a driver. , Respectively.

【0007】そして、上記知見〜に基づき更に鋭意
検討を重ねた結果、コアが内芯球と該内芯球を被覆する
包囲層からなり、このコアを被覆するカバーが外層と内
層からなるマルチピースソリッドゴルフボールにおい
て、上記カバーの外層硬度をショアDで40〜60と
し、上記カバーの内層硬度をショアDで55〜70、上
記包囲層の表面硬度をショアDで内芯球の表面硬度より
高くし、上記内芯球の硬度を100kg荷重負荷時の変
形量で3.0〜8.0mmとし、この内芯球硬度Aとボ
ール硬度Bとの比が100kg荷重負荷時の変形量で
1.1≦A/B≦3.5に形成することにより、ボール
の大変形領域であるドライバーでのフルショット時、中
でも低ヘッドスピードのプレーヤーがショットした場合
にもボールに十分な変形を与えることができ、ヘッドス
ピードの高低にかかわらず、高反発性を維持しつつ、適
度なスピン量により飛距離が飛躍的に増大し、軟らかく
非常に良好な打感が得られると共に、ボールの小変形領
域であるサンドウェッジ等でのアプローチショット時や
パッティング時においてスピンがよくかかり、優れたコ
ントロール性と軟らかく良好な打感を有し、従来のスリ
ーピースソリッドゴルフボールにおける課題を効果的に
解決し得るマルチピースソリッドゴルフボールが得られ
ることを見出し、本発明を完成したものである。
As a result of further intensive studies based on the above findings, the core is composed of an inner core sphere and an envelope layer covering the inner core sphere, and the cover covering the core is composed of an outer layer and an inner layer. In the solid golf ball, the outer layer hardness of the cover is 40-60 in Shore D, the inner layer hardness of the cover is 55-70 in Shore D, and the surface hardness of the surrounding layer is higher than the surface hardness of the inner sphere in Shore D. Then, the hardness of the inner core sphere is set to 3.0 to 8.0 mm in the amount of deformation under a load of 100 kg, and the ratio of the inner core sphere hardness A to the ball hardness B is 1. By forming 1 ≦ A / B ≦ 3.5, the ball is sufficiently deformed when a full shot with a driver, which is a large deformation area of the ball, especially when a player with a low head speed hits. Irrespective of the level of head speed, while maintaining high resilience, the flight distance is dramatically increased by an appropriate amount of spin, giving a soft and very good feel and Spin is applied well at the time of approach shot or putting with sand wedge etc. which is the deformation area, has excellent controllability and soft and good hit feeling, and can effectively solve the problem in the conventional three-piece solid golf ball The inventors have found that a multi-piece solid golf ball can be obtained, and have completed the present invention.

【0008】従って、本発明は、(1)コアが内芯球と
該内芯球を被覆する包囲層からなり、このコアを被覆す
るカバーが外層と内層からなるマルチピースソリッドゴ
ルフボールにおいて、上記カバーの外層硬度がショアD
で40〜60であり、上記カバーの内層硬度がショアD
で55〜70、上記包囲層の表面硬度がショアDで内芯
球の表面硬度より高く、上記内芯球の硬度が100kg
荷重負荷時の変形量で3.0〜8.0mmであり、この
内芯球硬度Aとボール硬度Bとの比が100kg荷重負
荷時の変形量で1.1≦A/B≦3.5であることを特
徴とするマルチピースソリッドゴルフボール、(2)内
芯球がゴム基材を主材とし、直径が20〜37mmであ
り、コア直径が32〜41mmである(1)記載のマル
チピースソリッドゴルフボール、(3)カバーの外層の
厚さが0.3〜3.0mm、カバーの内層の厚さが0.
5〜3.0mmであり、これら外層と内層の硬度差がシ
ョアDで5以上である(1)又は(2)記載のマルチピ
ースソリッドゴルフボール、及び、(4)カバーの内層
硬度が外層硬度より高く形成された(1),(2)又は
(3)記載のマルチピースソリッドゴルフボールを提供
する。
Accordingly, the present invention provides (1) a multi-piece solid golf ball according to the above (1), wherein the core comprises an inner sphere and an envelope layer covering the inner sphere, and a cover covering the core comprises an outer layer and an inner layer. The outer layer hardness of the cover is Shore D
And the inner layer hardness of the cover is Shore D.
55 to 70, the surface hardness of the surrounding layer is higher than the surface hardness of the inner sphere at Shore D, and the hardness of the inner sphere is 100 kg.
The deformation amount under load is 3.0 to 8.0 mm, and the ratio between the inner core ball hardness A and the ball hardness B is 1.1 ≦ A / B ≦ 3.5 at a load amount of 100 kg load. (2) The multi-piece solid golf ball according to (1), wherein the inner core ball is mainly composed of a rubber base material, has a diameter of 20 to 37 mm, and a core diameter of 32 to 41 mm. Peace solid golf ball, (3) the thickness of the outer layer of the cover is 0.3 to 3.0 mm, and the thickness of the inner layer of the cover is 0.3 mm.
The multi-piece solid golf ball according to (1) or (2), wherein the hardness difference between the outer layer and the inner layer is 5 or more in Shore D, and (4) the hardness of the inner layer of the cover is the outer layer hardness. A multi-piece solid golf ball according to (1), (2) or (3), which is formed higher.

【0009】以下、本発明につき更に詳しく説明する
と、本発明のマルチピースソリッドゴルフボール1は、
図1に示すように、内芯球3と、この内芯球を被覆する
包囲層4からなるコア2と、このコアの周りに形成され
た内層6と外層7からなるカバー5とからなる4層構造
のゴルフボールである。なお、包囲層4は単層には限ら
れず2層以上の複数層に形成することができる。
Hereinafter, the present invention will be described in more detail. The multi-piece solid golf ball 1 of the present invention
As shown in FIG. 1, a core 4 composed of an inner core sphere 3, an envelope layer 4 covering the inner core sphere, and a cover 5 composed of an inner layer 6 and an outer layer 7 formed around the core. This is a golf ball having a layer structure. The surrounding layer 4 is not limited to a single layer, and may be formed in two or more layers.

【0010】本発明のゴルフボール1のコア2を構成す
る内芯球3の硬度は、100kg荷重負荷時の変形量で
3.0〜8.0mmであり、より好ましくは3.5〜
7.5mmである。変形量が3.0mm未満ではコアが
硬くなりすぎ、特に低ヘッドスピードのプレーヤーにお
いて飛距離が低下し、打感が硬くなる。一方、8.0m
mを超えるとコアが軟らかくなりすぎ、反発性や耐久性
が低下しすぎる。また、内芯球の表面硬度は、ショアD
硬度計での測定(以下、ショアDという)で好ましくは
15〜55、より好ましくは20〜50である。ここ
で、内芯球の表面硬度とは内芯球の表面の硬度を示し、
5点測定の平均値である。
The hardness of the inner core ball 3 constituting the core 2 of the golf ball 1 of the present invention is 3.0 to 8.0 mm in terms of deformation under a load of 100 kg, and more preferably 3.5 to 8.0 mm.
7.5 mm. When the deformation amount is less than 3.0 mm, the core becomes too hard, and particularly in a player with a low head speed, the flight distance decreases and the hit feeling becomes hard. On the other hand, 8.0m
If it exceeds m, the core will be too soft, and the resilience and durability will be too low. The surface hardness of the inner sphere is Shore D
It is preferably from 15 to 55, more preferably from 20 to 50, as measured by a hardness tester (hereinafter referred to as Shore D). Here, the surface hardness of the inner sphere indicates the hardness of the surface of the inner sphere,
It is the average value of five-point measurements.

【0011】また、内芯球の直径は好ましくは20〜3
7mm、より好ましくは22〜35mmである。なお、
内芯球の比重、重量などは、本発明の目的を達成し得る
範囲で適宜調整することができる。
The diameter of the inner sphere is preferably 20 to 3
7 mm, more preferably 22 to 35 mm. In addition,
The specific gravity, weight, and the like of the inner core sphere can be appropriately adjusted as long as the object of the present invention can be achieved.

【0012】本発明において内芯球を形成するための組
成物としては、特に制限されず、通常内芯球の形成に用
いられるゴム基材を主材とし、このゴム基材に架橋剤、
共架橋剤、不活性充填剤等を添加して形成することがで
きる。この場合、ゴム基材としては、従来からソリッド
ゴルフボールに用いられている天然ゴム及び/又は合成
ゴムを使用することができるが、本発明においては、シ
ス構造を少なくとも40%以上有する1,4−シス−ポ
リブタジエンが特に好ましい。この場合、所望により該
ポリブタジエンに天然ゴム、ポリイソプレンゴム、スチ
レンブタジエンゴム等を適宜配合してもよい。また、架
橋剤としてはジクミルパーオキサイドやジ−t−ブチル
パーオキサイドなどのような有機過酸化物等が例示され
る。この架橋剤の配合量は通常、基材ゴム成分100重
量部に対して通常0.5〜2.0重量部程度とされる。
In the present invention, the composition for forming the inner core sphere is not particularly limited, and a rubber base material usually used for forming the inner core sphere is mainly used.
It can be formed by adding a co-crosslinking agent, an inert filler or the like. In this case, as the rubber substrate, natural rubber and / or synthetic rubber conventionally used for solid golf balls can be used. In the present invention, 1,4 having at least 40% or more of the cis structure is used. -Cis-polybutadiene is particularly preferred. In this case, if necessary, natural rubber, polyisoprene rubber, styrene-butadiene rubber, or the like may be appropriately blended with the polybutadiene. Examples of the crosslinking agent include organic peroxides such as dicumyl peroxide and di-t-butyl peroxide. The amount of the crosslinking agent is usually about 0.5 to 2.0 parts by weight based on 100 parts by weight of the base rubber component.

【0013】上記共架橋剤としては、特に制限されず、
不飽和脂肪酸の金属塩、特に、炭素原子数3〜8の不飽
和脂肪酸(例えばアクリル酸、(メタ)アクリル酸等)
の亜鉛塩やマグネシウム塩が例示されるが、アクリル酸
亜鉛が特に好適である。なお、共架橋剤の配合量は適宜
設定され、通常は基材ゴム成分100重量部に対して5
〜50重量部程度とされる。更に、不活性充填剤として
は酸化亜鉛、硫酸バリウム、シリカ、炭酸カルシウム及
び炭酸亜鉛等が例示されるが、酸化亜鉛、硫酸バリウム
が一般的であり、その配合量はコアとカバーの比重、ボ
ールの重量規格等に左右され、特に制限されないが、通
常は基材ゴム100重量部に対して5〜100重量部で
ある。なお、本発明においては上記架橋剤や酸化亜鉛、
硫酸バリウム等の充填剤の配合割合を適宜調整すること
により、内芯球の硬度及び重量を最適値に調整すること
ができる。
The co-crosslinking agent is not particularly limited.
Metal salts of unsaturated fatty acids, especially unsaturated fatty acids having 3 to 8 carbon atoms (for example, acrylic acid, (meth) acrylic acid, etc.)
Examples thereof include zinc salts and magnesium salts, and zinc acrylate is particularly preferred. The compounding amount of the co-crosslinking agent is appropriately set, and usually is 5 to 100 parts by weight of the base rubber component.
About 50 parts by weight. Further, examples of the inert filler include zinc oxide, barium sulfate, silica, calcium carbonate, zinc carbonate, and the like. Zinc oxide and barium sulfate are generally used, and the amount of the filler is determined by the specific gravity of the core and the cover, and the amount of the ball. The weight is usually 5 to 100 parts by weight based on 100 parts by weight of the base rubber. In the present invention, the crosslinking agent and zinc oxide,
The hardness and weight of the inner sphere can be adjusted to optimal values by appropriately adjusting the mixing ratio of the filler such as barium sulfate.

【0014】上記成分を配合して得られる内芯球用組成
物は通常の混練機、例えばバンバリーミキサーやロール
等を用いて混練し、内芯球用金型を用いて上記硬度の内
芯球を形成することができる。
The composition for the inner core sphere obtained by blending the above components is kneaded using a conventional kneading machine, for example, a Banbury mixer or a roll, and the inner core sphere having the above hardness is formed using a mold for the inner core sphere. Can be formed.

【0015】上記内芯球3を被覆する包囲層4は、その
表面硬度がショアDで好ましくは40〜70、より好ま
しくは45〜68である。この包囲層の表面硬度は上記
内芯球の表面硬度より高いことが必要であり、具体的に
はショアDで好ましくは5〜55、より好ましくは5〜
45高く形成される。包囲層の表面硬度が内芯球の表面
硬度より低くなると反発性、耐久性が低下しすぎる。な
お、包囲層の表面硬度の定義、測定方法は上記内芯球の
場合と同じであり、包囲層が2層以上の複数層の場合
は、この包囲層の表面硬度は最外包囲層の表面硬度を指
す。
The surrounding layer 4 covering the inner core sphere 3 has a Shore D surface hardness of preferably 40 to 70, more preferably 45 to 68. The surface hardness of the envelope layer needs to be higher than the surface hardness of the inner core sphere, and specifically, Shore D is preferably 5 to 55, and more preferably 5 to 55.
45 higher. If the surface hardness of the surrounding layer is lower than the surface hardness of the inner core sphere, the resilience and durability are too low. Note that the definition and measurement method of the surface hardness of the surrounding layer are the same as those for the inner core sphere. When the surrounding layer is composed of two or more layers, the surface hardness of the surrounding layer is the surface hardness of the outermost surrounding layer. Refers to hardness.

【0016】なお、包囲層の厚さは好ましくは0.5〜
10.5mm、より好ましくは1〜9mmであり、比重
は本発明の目的を達成し得る範囲で適宜調整することが
できる。
The thickness of the surrounding layer is preferably 0.5 to
It is 10.5 mm, more preferably 1 to 9 mm, and the specific gravity can be appropriately adjusted within a range that can achieve the object of the present invention.

【0017】上記包囲層4は、比較的硬く、反発性の良
い部材を用いることが好ましく、上記内芯球と同様にゴ
ム基材を主材として形成してもよく、或いは、熱可塑性
樹脂を主材として形成してもよい。この場合、熱可塑性
樹脂としては、例えばハイトレル4767(東レ・デュ
ポン社製)等のポリエステル系熱可塑性エラストマー、
ハイミラン(三井・デュポンポリケミカル社製)、サー
リン(米国デュポン社製)等のアイオノマー樹脂などが
好適に用いられ、これらの1種を単独で又は2種以上を
混合して用いることができる。なお、上記樹脂組成物に
加えて重量調整剤として酸化亜鉛、硫酸バリウム等の無
機充填剤や着色のために二酸化チタン等の添加剤を添加
することができる。
The surrounding layer 4 is preferably made of a member that is relatively hard and has good resilience, and may be formed of a rubber base material as in the case of the inner core ball, or a thermoplastic resin. It may be formed as a main material. In this case, as the thermoplastic resin, for example, polyester-based thermoplastic elastomer such as Hytrel 4767 (manufactured by Toray DuPont),
Ionomer resins such as Himilan (manufactured by DuPont-Mitsui Polychemicals) and Surlyn (manufactured by DuPont, USA) are suitably used, and one of these can be used alone or two or more can be used in combination. In addition, an inorganic filler such as zinc oxide or barium sulfate or an additive such as titanium dioxide for coloring can be added as a weight adjuster in addition to the resin composition.

【0018】上記包囲層4を内芯球3に被覆する方法
は、特に制限されず、包囲層がゴム部材の場合は、予め
ハーフカップ状に半加硫状態で成形しておき、この一対
のハーフカップで上記内芯球を被包し、所定の条件下加
熱加圧成形する方法が採用され、一方、包囲層が熱可塑
性樹脂の場合は、溶融包囲層組成物を射出成形により内
芯球の周囲に被覆する方法などが採用される。
The method of coating the inner sphere 3 with the surrounding layer 4 is not particularly limited. When the surrounding layer is a rubber member, it is preliminarily formed into a half cup shape in a semi-vulcanized state. A method in which the inner core sphere is covered with a half cup and heated and pressed under a predetermined condition is adopted. On the other hand, when the envelope layer is made of a thermoplastic resin, the molten envelope layer composition is injected with the inner core sphere by injection molding. And the like.

【0019】このようにして得られたコア2は、その直
径が好ましくは32〜41mm、より好ましくは34〜
40mmである。
The core 2 thus obtained preferably has a diameter of 32 to 41 mm, more preferably 34 to 41 mm.
40 mm.

【0020】上記コア2を被覆するカバー5は、内層6
と外層7とからなり、この内層6の周囲に外層7を被覆
してなるものである。カバーの外層7は、その硬度がシ
ョアDで40〜60であり、好ましくは42〜58であ
る。外層の硬度が40未満では反発性が低下しすぎ、6
0を超えるとアプローチショット時のスピン性能が低下
し、打感が硬くなる。また、カバーの内層6の硬度は、
ショアDで55〜70であり、内層の硬度が55未満で
あると反発性が低下しすぎ、70を超えると打感が硬く
なりすぎる。また、カバーの内層硬度は外層硬度より高
いほうが好ましく、内層と外層との硬度差はショアDで
好ましくは5以上、より好ましくは5〜25である。
The cover 5 for covering the core 2 includes an inner layer 6
And an outer layer 7. The outer layer 7 covers the inner layer 6. The outer layer 7 of the cover has a Shore D hardness of 40-60, preferably 42-58. If the hardness of the outer layer is less than 40, the resilience is too low, and 6
If it exceeds 0, the spin performance at the time of the approach shot is reduced, and the hit feeling becomes hard. The hardness of the inner layer 6 of the cover is
When the Shore D is 55 to 70, and the hardness of the inner layer is less than 55, the resilience is too low, and when the hardness is more than 70, the hit feeling is too hard. Further, the inner layer hardness of the cover is preferably higher than the outer layer hardness, and the hardness difference between the inner layer and the outer layer is preferably 5 or more, more preferably 5 to 25, in Shore D.

【0021】上記カバー外層の厚さは好ましくは0.3
〜3.0mm、より好ましくは0.5〜2.5mmであ
り、カバー内層の厚さは好ましくは0.5〜3.0m
m、より好ましくは0.7〜2.8mmである。また、
外層と内層とを合わせたカバー全体の厚さは好ましくは
0.8〜5.4mm、より好ましくは1.3〜4.4m
mである。
The thickness of the cover outer layer is preferably 0.3
To 3.0 mm, more preferably 0.5 to 2.5 mm, and the thickness of the cover inner layer is preferably 0.5 to 3.0 m.
m, more preferably 0.7 to 2.8 mm. Also,
The total thickness of the cover including the outer layer and the inner layer is preferably 0.8 to 5.4 mm, and more preferably 1.3 to 4.4 m.
m.

【0022】上記カバー内層を構成する材料としては、
硬く、反発性に優れた樹脂が好ましく、例えばハイミラ
ンAM7317、同AM7318、同1605、同17
06、同1557、同1856(三井・デュポンポリケ
ミカル社製)等の市販アイオノマー樹脂が好ましく、そ
の他としてはポリエステル、ポリアミド、ポリウレタン
等の熱可塑性樹脂などが挙げられ、これらの1種を単独
で又は2種以上を混合して用いることができる。
The material constituting the cover inner layer includes:
A resin that is hard and has excellent resilience is preferable. For example, Himilan AM7317, AM7318, 1605, and 17
Commercially available ionomer resins such as No. 06, No. 1557 and No. 1856 (manufactured by DuPont-Mitsui Polychemicals) are preferable, and others include thermoplastic resins such as polyesters, polyamides and polyurethanes. Two or more kinds can be used as a mixture.

【0023】またカバー外層を構成する材料としては、
特に制限されずサーリン8120(米国デュポン社
製)、ハイミラン1706(三井・デュポンポリケミカ
ル社製)等の市販アイオノマー樹脂、ポリエステル、ポ
リアミド、ポリウレタン等の熱可塑性樹脂などが好適に
用いられ、これらの1種を単独で又は2種以上を混合し
て用いることができる。
The material constituting the cover outer layer includes:
There is no particular limitation, and commercially available ionomer resins such as Surlyn 8120 (manufactured by Dupont, USA) and Himilan 1706 (manufactured by Dupont Mitsui Polychemicals), thermoplastic resins such as polyester, polyamide, and polyurethane are preferably used. The species can be used alone or as a mixture of two or more.

【0024】更に、上記カバー内層、外層組成物には、
必要に応じてUV吸収剤、酸化防止剤、金属石鹸等の分
散助剤などを添加することもできる。
Further, the composition for the inner layer and the outer layer of the cover includes:
If necessary, a UV absorber, an antioxidant, and a dispersing aid such as a metal soap can be added.

【0025】なお、コアの周囲にカバーを被覆する方法
は特に制限されず、通常は予め半殻球状に成形した2枚
のハーフカップでコアを包み加熱加圧成形するか、カバ
ー用組成物をコアの周囲に射出成形してもよい。
The method of coating the cover around the core is not particularly limited. Usually, the core is wrapped in two half cups previously formed into a half-shell sphere, and the core is heated and pressed, or the cover composition is prepared. Injection molding may be performed around the core.

【0026】このようにして得られたゴルフボールの硬
度は、100kg荷重負荷時の変形量で好ましくは2.
3〜4.0mm、より好ましくは2.5〜3.8mmで
ある。この場合、上記内芯球の硬度Aとゴルフボールの
硬度Bとの比が100kg荷重負荷時の変形量で1.1
≦A/B≦3.5であり、好ましくは1.1≦A/B≦
3.0である。A/Bが1.1未満ではボールが軟らか
くなりすぎて反発性が低下し、3.5を超えるとボール
が硬すぎて打感が硬くなる。
The hardness of the golf ball obtained in this manner is preferably the amount of deformation under a load of 100 kg, preferably 2.
It is 3 to 4.0 mm, more preferably 2.5 to 3.8 mm. In this case, the ratio between the hardness A of the inner core ball and the hardness B of the golf ball is 1.1 in the amount of deformation under a load of 100 kg.
≦ A / B ≦ 3.5, preferably 1.1 ≦ A / B ≦
3.0. If A / B is less than 1.1, the ball becomes too soft and the resilience decreases, and if it exceeds 3.5, the ball is too hard and the hit feeling becomes hard.

【0027】なお、ボール重量、直径等のボール性状は
ゴルフ規則に従い適宜設定することができる。
The properties of the ball, such as the weight and diameter of the ball, can be appropriately set in accordance with the Rules of Golf.

【0028】本発明のゴルフボールは、以上の構成とす
ることにより、ドライバーでのヘッドスピードの依存性
が極めて少なく、クラブの番手の影響が極めて小さいも
のである。即ち、ボールの大変形領域であるドライバー
でのフルショット時、特に低ヘッドスピードのプレーヤ
ーがフルショットした場合でもボールに十分な変形を与
えることができ、ヘッドスピードの高低のかかわらず高
反発性を維持しつつ、軟らかく非常に良好な打感が得ら
れると共に、ボールの小変形領域であるサンドウェッジ
等でのアプローチショット時やパッティング時において
スピンがよくかかり、優れたコントロール性と軟らかく
良好な打感を有するものである。
With the golf ball of the present invention having the above-described structure, the dependence of the head speed on the driver is extremely small, and the influence of the club number is extremely small. In other words, when a full shot with a driver, which is a large deformation area of the ball, especially when a player with a low head speed makes a full shot, the ball can be sufficiently deformed, and high resilience is obtained regardless of the head speed. While maintaining, a soft and very good hit feeling can be obtained, and a good spin can be applied at the time of approach shot or putting with a sand wedge etc., which is a small deformation area of the ball, excellent controllability and soft and good hit feeling It has.

【0029】[0029]

【発明の効果】本発明によれば、ドライバーでのフルシ
ョット時にヘッドスピードの高低にかかわらず高反発性
を保ちつつ、良好な打感が得られると共に、サンドウェ
ッジ等でのアプローチショット時のスピン性能及びアプ
ローチショットやパッティング時の打感に優れたもので
ある。
According to the present invention, a good hit feeling can be obtained while maintaining high resilience irrespective of the head speed during a full shot with a driver, and a spin at the time of an approach shot with a sand wedge or the like can be obtained. It is excellent in performance and hit feeling at the time of approach shot and putting.

【0030】[0030]

【実施例】以下、実施例と比較例を示し、本発明を具体
的に説明するが、本発明は下記実施例に制限されるもの
ではない。
EXAMPLES The present invention will be described below in detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

【0031】〔実施例、比較例〕表1に示した配合処方
の内芯球組成物を混練ロールを用いて混練し、モールド
内で155℃において15分間加硫して、内芯球を調製
した。この内芯球上に包囲層がゴム部材の場合は、表1
に示す処方のゴム組成物を混練ロールで混練し、ハーフ
カップ状に半加硫状態で成形しておき、この一対のハー
フカップで上記内芯球を被包し、再度155℃で15分
間加圧成形しコアを得た(実施例5、6)。一方、包囲
層が熱可塑性樹脂の場合は、表1の処方に従い内芯球の
周りに包囲層組成物を射出成形しコアを得た(実施例1
〜4)。
[Examples and Comparative Examples] An inner core sphere composition having the composition shown in Table 1 was kneaded using a kneading roll and vulcanized in a mold at 155 ° C for 15 minutes to prepare an inner core sphere. did. When the surrounding layer is a rubber member on the inner core sphere, Table 1
The rubber composition of the formula shown in the following is kneaded with a kneading roll and molded in a half-cup shape in a semi-vulcanized state. Cores were obtained by pressing (Examples 5 and 6). On the other hand, when the envelope layer was a thermoplastic resin, the envelope layer composition was injection-molded around the inner core sphere according to the formulation in Table 1 to obtain a core (Example 1).
4).

【0032】得られたコアの上に表1に示した配合処方
により調製したカバー内層、外層を順次射出成形して実
施例1〜6の4層構造のゴルフボールを得た。また、比
較例1〜3はコアと2層のカバーからなるスリーピース
ソリッドゴルフボール、比較例4はコアと1層のカバー
からなるツーピースゴルフボールである。なお、表1に
示した配合量は総て重量部であり、その量比は内芯球、
包囲層、カバー内層、外層でそれぞれ独立したものであ
る。
The inner layer and the outer layer of the cover prepared according to the formulation shown in Table 1 were sequentially injection-molded on the obtained core to obtain golf balls having a four-layer structure of Examples 1 to 6. Comparative Examples 1 to 3 are three-piece solid golf balls having a core and a two-layer cover, and Comparative Example 4 are two-piece golf balls having a core and a one-layer cover. In addition, the compounding amount shown in Table 1 is all parts by weight, and the amount ratio is the inner sphere,
The envelope layer, the inner layer of the cover, and the outer layer are independent of each other.

【0033】[0033]

【表1】 *1:米国デュポン社製のアイオノマー樹脂 *2:三井・デュポンポリケミカル社製のアイオノマー
樹脂 *3:東レ・デュポン社製のポリエステル系熱可塑性エ
ラストマー
[Table 1] * 1: Ionomer resin manufactured by DuPont, USA * 2: Ionomer resin manufactured by DuPont Mitsui Polychemicals * 3: Polyester thermoplastic elastomer manufactured by Dupont Toray

【0034】次に、得られたゴルフボールについて、飛
び性能、打感を下記方法に従って計測した。結果を表2
に示す。
Next, the flying performance and the hit feeling of the obtained golf ball were measured according to the following methods. Table 2 shows the results
Shown in

【0035】飛び性能 スウィングロボットを用いて、ドライバー(PRO 2
30 Titan,ロフト角10度(ブリヂストンスポ
ーツ株式会社製;#W1)にてヘッドスピード50m/
sec(HS50)及びヘッドスピード35m/sec
でショットした時のスピン量、落下距離(キャリー)、
到達距離(トータル)を測定した。また、サンドウェッ
ジ(J’s Classical Edition(ブ
リヂストンスポーツ株式会社製;#SW))にてヘッド
スピード20m/sec(HS20)でショットした時
のスピン量を測定した。
Flying performance Using a swing robot, a driver (PRO 2
Head speed 50m / at 30 Titan, 10 degree loft angle (Bridgestone Sports Co., Ltd .; # W1)
sec (HS50) and head speed 35m / sec
Spin amount when shot with, fall distance (carry),
The reaching distance (total) was measured. Also, the amount of spin when a shot was taken at a head speed of 20 m / sec (HS20) with a sand wedge (J's Classical Edition (Bridgestone Sports Co., Ltd .; #SW)) was measured.

【0036】打感 ドライバー(#W1)により、ヘッドスピード約50m
/sec(HS50)でプロ5名、ヘッドスピード約3
5m/secで女子トップアマ5名が実打したときの感
触を下記基準により評価した。 ○:軟らかい △:普通 ×:硬い また、サンドウェッジ(#SW)により、ヘッドスピー
ド約20m/sec(HS20)でプロ5名が実打した
ときの感触を下記の基準により評価した。 ○:軟らかい △:普通 ×:硬い
The head speed is about 50 m by the feel driver (# W1).
/ Sec (HS50) with 5 professionals, head speed about 3
The feeling when five female top amateurs actually hit at 5 m / sec was evaluated according to the following criteria. :: Soft △: Normal ×: Hard In addition, the feel when five professional golfers actually hit with a sand wedge (#SW) at a head speed of about 20 m / sec (HS20) was evaluated according to the following criteria. ○: Soft △: Normal ×: Hard

【0037】[0037]

【表2】 *4:100kg荷重負荷時の変形量(mm)[Table 2] * 4: Deformation amount under 100 kg load (mm)

【0038】表2の結果から、比較例1は、特開平7−
24084号公報に記載したものと同じタイプのスリー
ピースゴルフボールであり、コアと中間層(内層カバ
ー)が軟らかいためにドライバーでの打感は軟らかい
が、カバーが硬いためにサンドウェッジでの打感が硬
く、スピンが十分にかからないものである。比較例2
は、特開平7−24085号公報に記載したものと同じ
タイプのコアが軟らかいスリーピースゴルフボールであ
り、コアが軟らかいのでドライバーでの打感は軟らかい
が、コア、カバーともに軟らかいために反発性が不十分
で飛距離がでないものである。比較例3は、特開平7−
24085号公報に記載したものと同じタイプのコアが
やや硬めのスリーピースゴルフボールであり、打感がや
や硬くなり、特に低ヘッドスピードでの打感、飛距離が
劣るものである。比較例4は、一般的なスピンタイプの
ツーピースゴルフボールであり、サンドウェッジでのス
ピン性能、打感は優れているが、コアが硬く、カバーが
単層で軟らかいためにドライバーでの打感が硬くなり、
スピン量の増大により飛距離が十分でないものである。
From the results shown in Table 2, Comparative Example 1 shows that
US Patent No. 24084 is a three-piece golf ball of the same type as that described in Japanese Patent Publication No. It is hard and does not take enough spin. Comparative Example 2
Is a three-piece golf ball having the same type of soft core as that described in Japanese Patent Application Laid-Open No. 7-24085. The soft core has a soft hitting sensation with a driver, but the core and cover are both soft, so the resilience is poor. It is enough and the flight distance is not enough. Comparative Example 3 is disclosed in
A core of the same type as that described in Japanese Patent No. 24085 is a slightly harder three-piece golf ball, which has a slightly hard hitting feel, and particularly a poor hitting feel at a low head speed and poor flight distance. Comparative Example 4 is a general spin-type two-piece golf ball, which has excellent spin performance and hit feeling with a sand wedge, but has a hard core and a single-layer soft cover, so that the hit feeling with a driver is low. Become harder,
The flight distance is not sufficient due to an increase in the spin amount.

【0039】これに対して、本発明のマルチピースソリ
ッドゴルフボールは、ドライバーではヘッドスピードの
高低にかかわらず飛距離が増大し、軟らかい打感が得ら
れると共に、サンドウェッジでは軟らかい打感と良好な
スピン性能が得られることが確認できた。
On the other hand, in the multi-piece solid golf ball of the present invention, the flight distance is increased irrespective of the head speed of the driver, so that a soft hit feeling is obtained, and the soft whit feeling is obtained with the sand wedge. It was confirmed that spin performance was obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例にかかるゴルフボールの概略
断面図である。
FIG. 1 is a schematic sectional view of a golf ball according to one embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 ゴルフボール 2 コア 3 内芯球 4 包囲層 5 カバー 6 内層 7 外層 DESCRIPTION OF SYMBOLS 1 Golf ball 2 Core 3 Inner core ball 4 Surrounding layer 5 Cover 6 Inner layer 7 Outer layer

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 コアが内芯球と該内芯球を被覆する包囲
層からなり、このコアを被覆するカバーが外層と内層か
らなるマルチピースソリッドゴルフボールにおいて、上
記カバーの外層硬度がショアDで40〜60であり、上
記カバーの内層硬度がショアDで55〜70、上記包囲
層の表面硬度がショアDで内芯球の表面硬度より高く、
上記内芯球の硬度が100kg荷重負荷時の変形量で
3.0〜8.0mmであり、この内芯球硬度Aとボール
硬度Bとの比が100kg荷重負荷時の変形量で1.1
≦A/B≦3.5であることを特徴とするマルチピース
ソリッドゴルフボール。
1. A multi-piece solid golf ball in which a core comprises an inner core ball and an envelope layer covering the inner core ball, and a cover covering the core comprises an outer layer and an inner layer. The hardness of the inner layer of the cover is 55 to 70 at Shore D, and the surface hardness of the surrounding layer is higher than the surface hardness of the inner core ball at Shore D.
The hardness of the inner core ball is 3.0 to 8.0 mm in the amount of deformation under a load of 100 kg, and the ratio between the inner core ball hardness A and the ball hardness B is 1.1 in the amount of deformation under a load of 100 kg.
≦ A / B ≦ 3.5. A multi-piece solid golf ball, wherein:
【請求項2】 内芯球がゴム基材を主材とし、直径が2
0〜37mmであり、コア直径が32〜41mmである
請求項1記載のマルチピースソリッドゴルフボール。
2. An inner core ball having a rubber base as a main material and having a diameter of 2
2. The multi-piece solid golf ball according to claim 1, having a core diameter of 0 to 37 mm and a core diameter of 32 to 41 mm.
【請求項3】 カバーの外層の厚さが0.3〜3.0m
m、カバーの内層の厚さが0.5〜3.0mmであり、
これら外層と内層の硬度差がショアDで5以上である請
求項1又は2記載のマルチピースソリッドゴルフボー
ル。
3. The thickness of the outer layer of the cover is 0.3 to 3.0 m.
m, the thickness of the inner layer of the cover is 0.5 to 3.0 mm,
3. The multi-piece solid golf ball according to claim 1, wherein the hardness difference between the outer layer and the inner layer is 5 or more in Shore D.
【請求項4】 カバーの内層硬度が外層硬度より高く形
成された請求項1,2又は3記載のマルチピースソリッ
ドゴルフボール。
4. The multi-piece solid golf ball according to claim 1, wherein the inner layer hardness of the cover is higher than the outer layer hardness.
JP15581197A 1997-05-29 1997-05-29 Multi-piece solid golf ball Expired - Lifetime JP3985107B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP15581197A JP3985107B2 (en) 1997-05-29 1997-05-29 Multi-piece solid golf ball
US09/086,493 US6468169B1 (en) 1997-05-29 1998-05-29 Multi-piece solid golf ball

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15581197A JP3985107B2 (en) 1997-05-29 1997-05-29 Multi-piece solid golf ball

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Publication Number Publication Date
JPH10328326A true JPH10328326A (en) 1998-12-15
JP3985107B2 JP3985107B2 (en) 2007-10-03

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ID=15613995

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