JP4909397B2 - ゴルフボールおよびゴルフボールの製造方法 - Google Patents
ゴルフボールおよびゴルフボールの製造方法 Download PDFInfo
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- JP4909397B2 JP4909397B2 JP2009248651A JP2009248651A JP4909397B2 JP 4909397 B2 JP4909397 B2 JP 4909397B2 JP 2009248651 A JP2009248651 A JP 2009248651A JP 2009248651 A JP2009248651 A JP 2009248651A JP 4909397 B2 JP4909397 B2 JP 4909397B2
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- A63B37/00—Solid balls; Rigid hollow balls; Marbles
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- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
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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
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- A63B37/00—Solid balls; Rigid hollow balls; Marbles
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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
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- A63B37/0038—Intermediate layers, e.g. inner cover, outer core, mantle
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Landscapes
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- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、上記事情に鑑みてなされたものであり、ドライバーショットのスピン量の変化を抑制しつつ、アプローチショットのスピン量を制御できる新規なゴルフボールを提供することを目的とする。本発明は、アプローチショットに対しては高スピン量であり、ドライバーショットに対しては低スピン量のゴルフボールを提供することをさらなる目的とする。
プランジャー面積:1cm2
DIE LENGTH:1mm
DIE DIA:1mm
荷重:588.399N
開始温度:30℃
昇温速度:3℃/分
(1)アプローチショットのスピン量
ゴルフラボラトリー社製スイングロボットに、アプローチウェッジ(SRIスポーツ社製、SRIXON I−302、シャフトS)を取り付け、ヘッドスピード21m/秒でゴルフボールを打撃し、打撃されたゴルフボールを連続写真撮影することによってスピン量(rpm)を測定した。測定は、各ゴルフボールについて10回ずつ行い、その平均値をスピン量とした。
ゴルフラボラトリー社製スイングロボットに、ドライバー(SRIスポーツ社製、XXIO シャフトS ロフト11°)を取り付け、ヘッドスピード50m/秒でゴルフボールを打撃し、打撃されたゴルフボールを連続写真撮影することによってスピン量(rpm)を測定した。測定は、各ゴルフボールについて10回ずつ行い、その平均値をスピン量とした。
ポリウレタン、中間層用組成物、またはカバー用組成物を用いて、熱プレス成形により、厚み約2mmのシートを作製し、23℃で2週間保存した。このシートを、測定基板などの影響が出ないように、3枚以上重ねた状態で、ASTM−D2240に規定するスプリング式硬度計ショアD型を備えた高分子計器社製自動ゴム硬度計P1型を用いて測定した。
スプリング式硬度計JIS−C型を備えた高分子計器社製自動ゴム硬度計P1型を用いて、コアの表面部において測定したJIS−C硬度をコア表面硬度とした。また、コアを半球状に切断し、切断面の中心において測定したJIS−C硬度をコア中心硬度とした。
ハーフシェルからサンプル(10mm×10mm)を切り出し、Perkin Elmer社製 Spectrum one FT−IR(ユニバーサルATRアクセサリー使用(ダイヤモンドクリスタル))を用いて、ATR法にて測定した。得られた赤外吸収スペクトルから、1100cm−1の吸光度(A1100)と1030cm−1の吸光度(A1030)をそれぞれ求めて、配向度(A1100/A1030)を算出した。
(1)センターの作製
表1に示す配合のセンター用ゴム組成物を混練し、半球状キャビティを有する上下金型内で170℃で15分間加熱プレスすることにより、直径38.5mm、質量34.9gの球状のセンターを得た。
アクリル酸亜鉛:日本蒸留製、「ZNDA−90S」
酸化亜鉛:東邦亜鉛製、「銀嶺R」
ジクミルパーオキサイド:日本油脂製、「パークミル(登録商標)D」
ジフェニルジスルフィド:住友精化製
表2に示した配合材料を、二軸混練型押出機によりミキシングして、ペレット状の中間層用組成物を調製した。押出は、スクリュー径45mm、スクリュー回転数200rpm、スクリューL/D=35で行った。配合物は、押出機のダイの位置で150〜230℃に加熱された。得られた中間層用組成物を上述のようにして得られたセンター上に射出成形して、センターと前記センターを被覆する中間層(厚み1.6mm)とを有するコアを作製した。
ハイミランAM7329:三井デュポンポリケミカル社製の亜鉛イオン中和エチレン−メタクリル酸共重合体系アイオノマー樹脂
表3〜表5に示した配合割合でポリウレタンと板状フィラーとを配合して、ペレット状のカバー用組成物を得た。配合は、モリヤマ社製混練試験装置ミックスラボを用いて、ポリウレタンを2分間素練りし、板状フィラーを投入してから3分間混練した。配合は、温度180℃、回転数100rpmで行った。
ゴルフボールNo.1〜No.21については、ハーフシェルの圧縮成形は、前述のようにして得たペレット状のカバー用組成物をハーフシェル成形用金型の下型の凹部ごとに1つずつ投入し、加圧してハーフシェルを成形した。圧縮成形は、成形温度170℃、成形時間5分、成形圧力2.94MPaの条件で行った。ゴルフボールNo.22〜25については、射出成形によりハーフシェルを作製した。射出成形は、成形温度210℃、射出圧力12MPa、射出時間0.5秒の条件で行った。
(2)で得られたコアを(4)で得られた2枚のハーフシェルで同心円状に被覆して、圧縮成形によりカバー(厚み0.5mm)を成形した。圧縮成形は、成形温度145℃、成形時間2分、成形圧力9.8MPaの条件で行った。得られたゴルフボール本体の表面をサンドブラスト処理して、マーキングを施した後、クリアーペイントを塗布し、40℃のオーブンで塗料を乾燥させ、直径42.7mm、質量45.3gのゴルフボールを得た。得られたゴルフボールの性能について評価した結果を併せて表3〜表5に示した。
エラストランXNY−70A:BASFジャパン社製熱可塑性ポリウレタンエラストマー
エラストランXNY−75A:BASFジャパン社製熱可塑性ポリウレタンエラストマー
エラストランXNY−83A:BASFジャパン社製熱可塑性ポリウレタンエラストマー
エラストランXNY−85A:BASFジャパン社製熱可塑性ポリウレタンエラストマー
エラストランXNY−90A:BASFジャパン社製熱可塑性ポリウレタンエラストマー
エラストランXNY−97A:BASFジャパン社製熱可塑性ポリウレタンエラストマー
板状フィラー:ホージュン社製エスベンNO12(有機化モンモリロナイト)
Claims (11)
- 樹脂成分100質量部に対して、フィラーを10質量部〜60質量部含有するカバーを有するゴルフボールであって、前記フィラーは、カバー表面と略平行に配向し、前記カバーの赤外スペクトルにおける1100cm −1 の吸光度(A1100)と1030cm −1 の吸光度(A1030)の比(A1100/A1030)が、1.3以下であることを特徴とするゴルフボール。
- 前記フィラーは、板状フィラーであり、板状フィラーの板面が、カバー表面に略平行に配向している請求項1に記載のゴルフボール。
- 前記フィラーは、層状珪酸塩または有機化層状珪酸塩である請求項1または2に記載のゴルフボール。
- 前記カバーのショアD硬度は、20以上80以下である請求項1〜3のいずれか一項に記載のゴルフボール。
- 前記カバーの厚みは、0.3mm以上、2mm以下である請求項1〜4のいずれか一項に記載のゴルフボール。
- センターと前記センターを被覆する1以上の中間層を有する多層コアを有する請求項1〜5のいずれか一項に記載のゴルフボール。
- 前記中間層は、厚みが0.3mm以上、6.0mm以下であって、ショアD硬度が、40以上、80以下である請求項6に記載のゴルフボール。
- 前記コアの中心硬度と表面硬度の硬度差が、JIS−C硬度で、10以上40以下である請求項6または7に記載のゴルフボール。
- 樹脂成分100質量部に対して、フィラーを10質量部〜60質量部含有するカバー用組成物を圧縮成形して、シェルを成形する工程と複数のシェルで被覆したコアを圧縮成形することによりカバーを成形する工程とを含むことを特徴とするゴルフボールの製造方法。
- 前記フィラーは、板状フィラーである請求項9に記載のゴルフボールの製造方法。
- 前記フィラーは、層状珪酸塩または有機化層状珪酸塩である請求項9または10に記載のゴルフボールの製造方法。
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| US12/909,910 US8721475B2 (en) | 2009-10-29 | 2010-10-22 | Golf ball and method for producing the same |
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| US6794447B1 (en) | 2000-07-28 | 2004-09-21 | Taylor Made Golf Co., Inc. | Golf balls incorporating nanocomposite materials |
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| JP4417298B2 (ja) * | 2004-07-09 | 2010-02-17 | Sriスポーツ株式会社 | ゴルフボール |
| JP4440177B2 (ja) | 2004-07-09 | 2010-03-24 | Sriスポーツ株式会社 | ゴルフボール |
| JP4455452B2 (ja) | 2004-09-01 | 2010-04-21 | Sriスポーツ株式会社 | ゴルフボール |
| JP4455453B2 (ja) | 2004-09-01 | 2010-04-21 | Sriスポーツ株式会社 | ゴルフボール |
| JP4535271B2 (ja) * | 2005-02-24 | 2010-09-01 | 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 |
| JP2007167257A (ja) * | 2005-12-21 | 2007-07-05 | Bridgestone Sports Co Ltd | マルチピースソリッドゴルフボール |
| JP4382112B2 (ja) * | 2007-05-24 | 2009-12-09 | Sriスポーツ株式会社 | ゴルフボール及びその製造方法 |
| JP5305718B2 (ja) * | 2008-04-21 | 2013-10-02 | ダンロップスポーツ株式会社 | ゴルフボール |
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