JP5207363B2 - ゴルフボール - Google Patents
ゴルフボール Download PDFInfo
- Publication number
- JP5207363B2 JP5207363B2 JP2008105236A JP2008105236A JP5207363B2 JP 5207363 B2 JP5207363 B2 JP 5207363B2 JP 2008105236 A JP2008105236 A JP 2008105236A JP 2008105236 A JP2008105236 A JP 2008105236A JP 5207363 B2 JP5207363 B2 JP 5207363B2
- Authority
- JP
- Japan
- Prior art keywords
- golf ball
- less
- hardness
- layer
- 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.)
- Expired - Fee Related
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Images
Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0023—Covers
- A63B37/0029—Physical properties
- A63B37/0033—Thickness
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0038—Intermediate layers, e.g. inner cover, outer core, mantle
- A63B37/004—Physical properties
- A63B37/0043—Hardness
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0038—Intermediate layers, e.g. inner cover, outer core, mantle
- A63B37/004—Physical properties
- A63B37/0045—Thickness
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/007—Characteristics of the ball as a whole
- A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
- A63B37/0076—Multi-piece balls, i.e. having two or more intermediate layers
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/007—Characteristics of the ball as a whole
- A63B37/0077—Physical properties
- A63B37/0092—Hardness distribution amongst different ball layers
- A63B37/00922—Hardness distribution amongst different ball layers whereby hardness of the cover is lower than hardness of the intermediate layers
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/005—Cores
- A63B37/006—Physical properties
- A63B37/0064—Diameter
Description
Hs > Hc > Hm (1)
硬度Hs、硬度Hm及び硬度Hcは、ショアD型硬度計で測定される。
Hs > Hc > Hm (1)
このゴルフボール2では、硬度Hsが大きな包囲層6が、ドライバーショットでの飛行性能に寄与する。このゴルフボール2では、硬度Hmが小さな中間層8及び硬度Hcが小さなカバー10が、ショートアイアンでのショットにおけるコントロール性能に寄与する。カバー10の硬度Hcは小さすぎないので、ドライバーショットにおいてスピンが抑制される。中間層8の硬度Hmは極めて小さいので、この中間層8によってソフトな打球感が達成される。さらに、カバー10の硬度Hcが小さく、かつ中間層8の硬度Hmがカバー10の硬度Hcよりさらに小さいことに起因して、スピン速度の安定が達成される。このゴルフボール2において優れたスピン安定性が得られる理由は詳細には不明であるが、中間層8及びカバー10が打撃時のゴルフボール2の変形挙動に何らかの影響を与えるためと推測される。
100質量部のハイシスポリブタジエン(JSR社の商品名「BR−730」)、34質量部のアクリル酸亜鉛、5質量部の酸化亜鉛、適量の硫酸バリウム、0.5質量部のジフェニルジスルフィド及び0.8質量部のジクミルパーオキサイド(日本油脂社)を混練し、ゴム組成物を得た。このゴム組成物を共に半球状キャビティを備えた上型及び下型からなる金型に投入し、170℃で30分間加熱して、直径が39.7mmであるコアを得た。
コア、包囲層、中間層及びカバーの仕様を下記の表2から4に示される通りとした他は実施例1と同様にして、実施例2から7及び比較例1から7のゴルフボールを得た。包囲層、中間層及びカバーの樹脂組成物の詳細が、下記の表1に示されている。比較例1に係るゴルフボールは、中間層を有さない。
ゴルフラボラトリー社のスイングマシンに、チタンヘッドを備えたドライバー(SRIスポーツ社の商品名「SRIXON W505」、シャフト硬度:X、ロフト角:8.5°)を装着した。ヘッド速度が50m/secである条件でゴルフボールを打撃して、発射地点から静止地点までの距離を測定した。さらに、打撃直後のバックスピン速度も測定した。12回測定されて得られたデータの平均値が、下記の表2から4に示されている。
ツルテンパー社のスイングマシンに、アプローチウエッジ(SRIスポーツ社の商品名「SRIXON I302」)を装着した。ヘッド速度が16m/secである条件でゴルフボールを打撃して、バックスピン速度を測定した。12回測定されて得られたデータの平均値と、幅(最大値から最小値を減じた値)とが、下記の表2から4に示されている。
ゴルファーにドライバー、アプローチウエッジ及びパターでゴルフボールを打撃させ、下記基準に基づき格付けを行った。
A:極めてソフト
B:ソフト
C:ハード
D:極めてハード
この結果が、下記の表2から4に示されている。
4・・・コア
6・・・包囲層
8・・・中間層
10・・・カバー
12・・・ディンプル
Claims (8)
- コアと、このコアの外側に位置する包囲層と、この包囲層の外側に位置する中間層と、この中間層の外側に位置するカバーとを備えており、
上記中間層の厚みTmが1.0mm以下であり、
上記カバーの厚みTcが0.6mmよりも小さく、
上記厚みTmと厚みTcとの合計が1.5mm以下であり、
上記カバーのショアD硬度Hcが38以下であり、
上記包囲層のショアD硬度Hs、上記中間層のショアD硬度Hm及び上記カバーのショアD硬度Hcが下記数式(1)を満たし、
上記硬度Hsと上記硬度Hcとの差(Hs−Hc)が15以上50以下であり、
上記硬度Hcと上記硬度Hmとの差(Hc−Hm)が2以上25以下であるゴルフボール。
Hs > Hc > Hm (1) - 上記カバーの基材がポリウレタンである請求項1に記載のゴルフボール。
- 上記中間層の基材が、ポリウレタン、ポリエステル、ポリアミド、ポリオレフィン、ポリスチレン及びアイオノマー樹脂からなる群より選択された1種又は2種以上である請求項1又は2に記載のゴルフボール。
- 上記中間層の基材がポリウレタンである請求項3に記載のゴルフボール。
- 上記包囲層の基材がアイオノマー樹脂である請求項1から4のいずれかに記載のゴルフボール。
- 上記包囲層のショアD硬度Hsが50以上である請求項1から5のいずれかに記載のゴルフボール。
- 上記中間層のショアD硬度Hmが10以上40未満である請求項1から6のいずれかに記載のゴルフボール。
- 上記コアの直径が35.0mm以上42.0mm以下である請求項1から7のいずれかに記載のゴルフボール。
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JP2008105236A JP5207363B2 (ja) | 2008-04-15 | 2008-04-15 | ゴルフボール |
US12/397,706 US8292759B2 (en) | 2008-04-15 | 2009-03-04 | Golf ball |
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Publication number | Priority date | Publication date | Assignee | Title |
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US10449420B2 (en) * | 2008-01-10 | 2019-10-22 | Acushnet Company | Multi-layer core golf ball |
JP2012139303A (ja) * | 2010-12-28 | 2012-07-26 | Dunlop Sports Co Ltd | ゴルフボール |
JP5828645B2 (ja) * | 2011-02-22 | 2015-12-09 | ダンロップスポーツ株式会社 | ゴルフボール |
JP5970235B2 (ja) * | 2012-05-24 | 2016-08-17 | ダンロップスポーツ株式会社 | ゴルフボール |
JP5970240B2 (ja) * | 2012-05-29 | 2016-08-17 | ダンロップスポーツ株式会社 | ゴルフボール |
KR20130135755A (ko) * | 2012-06-01 | 2013-12-11 | 던롭 스포츠 가부시키가이샤 | 골프공 |
US9440117B2 (en) * | 2013-12-27 | 2016-09-13 | Dunlop Sports Co. Ltd. | Golf ball |
JP6859682B2 (ja) * | 2016-12-02 | 2021-04-14 | ブリヂストンスポーツ株式会社 | マルチピースソリッドゴルフボール |
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JP2888172B2 (ja) * | 1995-06-14 | 1999-05-10 | ブリヂストンスポーツ株式会社 | マルチピースソリッドゴルフボール |
JP3656808B2 (ja) * | 1999-03-03 | 2005-06-08 | ブリヂストンスポーツ株式会社 | ソリッドゴルフボール及びその選定方法 |
JP3985127B2 (ja) * | 2000-12-25 | 2007-10-03 | ブリヂストンスポーツ株式会社 | マルチピースソリッドゴルフボール |
US7131915B2 (en) * | 2001-04-10 | 2006-11-07 | Acushnet Company | Three-layer-cover golf ball |
JP4214003B2 (ja) * | 2002-08-12 | 2009-01-28 | Sriスポーツ株式会社 | マルチピースソリッドゴルフボール |
JP4171887B2 (ja) * | 2002-12-02 | 2008-10-29 | ブリヂストンスポーツ株式会社 | マルチピースソリッドゴルフボール |
JP4489530B2 (ja) * | 2004-07-29 | 2010-06-23 | Sriスポーツ株式会社 | ゴルフボール |
US7294068B2 (en) * | 2005-05-24 | 2007-11-13 | Bridgestone Sports Co., Ltd. | Multi-piece solid golf ball |
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US20090258730A1 (en) | 2009-10-15 |
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