JPH085980B2 - Golf equipment parts - Google Patents

Golf equipment parts

Info

Publication number
JPH085980B2
JPH085980B2 JP61161283A JP16128386A JPH085980B2 JP H085980 B2 JPH085980 B2 JP H085980B2 JP 61161283 A JP61161283 A JP 61161283A JP 16128386 A JP16128386 A JP 16128386A JP H085980 B2 JPH085980 B2 JP H085980B2
Authority
JP
Japan
Prior art keywords
ionomer resin
golf
golf equipment
irradiated
reference example
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 - Lifetime
Application number
JP61161283A
Other languages
Japanese (ja)
Other versions
JPS6315832A (en
Inventor
一郎 冨永
丈人 松木
哲男 山口
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.)
Sumitomo Rubber Industries Ltd
Original Assignee
Sumitomo Rubber Industries 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 Sumitomo Rubber Industries Ltd filed Critical Sumitomo Rubber Industries Ltd
Priority to JP61161283A priority Critical patent/JPH085980B2/en
Publication of JPS6315832A publication Critical patent/JPS6315832A/en
Publication of JPH085980B2 publication Critical patent/JPH085980B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Chemical Or Physical Treatment Of Fibers (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明はアイオノマー樹脂で成型されたゴルフ用具用
部材、例えばゴルフボール用コアーを被覆するカバーま
たはゴルフクラブのインサートに関する。
Description: TECHNICAL FIELD The present invention relates to a golf club member molded from an ionomer resin, for example, a cover for covering a golf ball core or a golf club insert.

(従来の技術) 放射線、例えば電子線およびγ線を照射することによ
り、プラスチックス(例えばポリエチレンやポリ塩化ビ
ニルあるいはゴム等)の性質を改質・改善することが一
般的に行なわれている。例えば、ポリエチレンに放射
線、特に電子線を照射すると、放射線架橋反応が起こ
り、高温での性質を著しく改善させることができる他、
耐薬品性の向上や全く別の効果として形状の記憶効果な
どの機能が付与されることが知られている。
(Prior Art) It is common practice to modify and improve the properties of plastics (eg, polyethylene, polyvinyl chloride, rubber, etc.) by irradiating them with radiation such as electron beams and γ rays. For example, when polyethylene is exposed to radiation, especially an electron beam, a radiation crosslinking reaction occurs, and the properties at high temperatures can be significantly improved.
It is known that functions such as improvement of chemical resistance and memory effect of shape are added as completely different effect.

ところが、この放射線によるポリマー物質の改質・改
善はアイオノマー樹脂の改質には未だ用いられていな
い。
However, the modification / improvement of the polymer substance by the radiation has not been used yet for the modification of the ionomer resin.

(発明の内容) 本発明者らはアイオノマー樹脂に放射線を照射するこ
とにより、このアイオノマー樹脂をゴルフ用具用部材に
用いた時に特に優れた効果が付与できることを見出し
た。
(Details of the Invention) The present inventors have found that by irradiating the ionomer resin with radiation, a particularly excellent effect can be imparted when the ionomer resin is used as a member for golf equipment.

すなわち、本発明は放射線照射を行ったアイオノマー
樹脂で成型された、ゴルフボール用コアーを被覆するカ
バーおよびゴルフクラブのインサートから成る群から選
択されるゴルフ用具用部材を提供する。
That is, the present invention provides a member for a golf equipment selected from the group consisting of a cover for covering a core for a golf ball and an insert for a golf club, which is molded from an ionomer resin which has been irradiated.

アイオノマー樹脂はイオン架橋結合を持ったポリマー
群を意味し、強靭性および弾性が優れているので種々の
製品のカバー材料、補強材等に用いられている。本発明
のアイオノマー樹脂としてはこれら種々のアイオノマー
樹脂の如何なるものを用いてもよい。好適なアイオノマ
ー樹脂はモノオレフィンと炭素数3〜8の不飽和モノま
たはジカルボン酸およびこれらのエステルからなる群か
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)を種々の金属、例えばナトリウム、カリ
ウム、リチウム、銅、マグネシウム、カルシウム、ニッ
ケル、亜鉛、アルミニウム、鉄等により中和した熱可塑
性樹脂を言う。
An ionomer resin means a group of polymers having an ionic cross-linking bond, and is excellent in toughness and elasticity, and is therefore used as a cover material, a reinforcing material and the like for various products. As the ionomer resin of the present invention, any of these various ionomer resins may be used. A preferred ionomer resin is a polymer of a monoolefin and at least one selected from the group consisting of unsaturated mono- or dicarboxylic acids having 3 to 8 carbon atoms and their esters (unsaturated mono- or dicarboxylic acids and / or their Ester 4-
(30 wt% content) is a thermoplastic resin obtained by neutralizing various metals such as sodium, potassium, lithium, copper, magnesium, calcium, nickel, zinc, aluminum and iron.

このようなアイオノマー樹脂の例としては、デュポン
社から市販されている種々のサーリン、例えばサーリン
1601、サーリン1605、サーリン1707、サーリン1706等が
挙げられる。
Examples of such ionomer resins include various Surlyns commercially available from DuPont, such as Surlyn.
1601, Surlyn 1605, Surlyn 1707, Surlyn 1706 and the like.

本発明の放射線架橋に用いる放射線としては通常電子
線およびコバルト60などによるγ線等が挙げられる。
Examples of the radiation used in the radiation crosslinking of the present invention include electron beams and gamma rays with cobalt 60 and the like.

放射線照射方法は常套の如何なる方法を用いてもよ
く、例えばアイオノマー樹脂成型品に通常の装置により
照射する。
As the radiation irradiation method, any conventional method may be used. For example, the ionomer resin molded product is irradiated with a usual apparatus.

放射線を放射したアイオノマー樹脂成型物であるゴル
フ用具用部材はアイオノマー樹脂が本来有しているイオ
ン結合による架橋の他に、放射線架橋反法が起こりさら
にアイオノマー樹脂の性能を改善する。
The member for golf equipment, which is an ionomer resin molded product that emits radiation, undergoes radiation cross-linking reaction in addition to the cross-linking by the ionic bond that the ionomer resin originally has, and further improves the performance of the ionomer resin.

本発明のゴルフ用具用部材は具体的にはゴルフボール
用コアーを被覆するカバーまたはゴルフクラブのインサ
ートが挙げられる。
Specific examples of the golf equipment member of the present invention include a cover or a golf club insert that covers the core of the golf ball.

(発明の効果) 本発明の放射線を照射したアイオノマー樹脂から得ら
れるゴルフ用具用部材は低温、例えばマイナス10℃以下
の温度で高い耐衝撃性、強度、耐溶剤クラック性等が得
られる。このような低温での高い耐久性により、ゴルフ
用具用部材としてその性能を改善する。
(Effects of the Invention) The golf equipment member obtained from the ionomer resin irradiated with radiation of the present invention has high impact resistance, strength, solvent crack resistance and the like at low temperatures, for example, temperatures of -10 ° C or lower. Such high durability at low temperatures improves the performance as a golf equipment member.

(実施例) 本発明を実施例によりさらに詳細に説明する。(Examples) The present invention will be described in more detail with reference to Examples.

参考例1 サンプル寸法30mm×10mm×0.8mmのアイオノマー樹脂
押出成型物(デュポン社のサーリン1706使用)にコバル
ト60によるγ線照射を行った。得られた照射サンプルを
60℃のトルエン中に1時間浸漬し、浸漬直後の体積膨潤
率を測定した。結果を以下の表−1に示す。
Reference Example 1 An ionomer resin extrudate having a sample size of 30 mm × 10 mm × 0.8 mm (using Surlyn 1706 manufactured by DuPont) was irradiated with γ-rays using cobalt-60. The obtained irradiation sample
It was immersed in toluene at 60 ° C. for 1 hour, and the volume swelling ratio was measured immediately after the immersion. The results are shown in Table 1 below.

表−1から明らかなようにγ線照射により架橋密度が
上がり、体積変化率が減少する。
As is clear from Table-1, cross-linking density is increased and the volume change rate is decreased by γ-ray irradiation.

参考例2 参考例1と同じサンプルを用いて線膨張係数を測定し
た。線膨張係数は島津製作所社製サーマル・アナライザ
ーDT−30を用いて昇温速度2℃/分で測定した。結果を
表−2に示す。
Reference Example 2 Using the same sample as Reference Example 1, the linear expansion coefficient was measured. The linear expansion coefficient was measured at a temperature rising rate of 2 ° C./minute using a thermal analyzer DT-30 manufactured by Shimadzu Corporation. Table 2 shows the results.

上記表−2により明らかなようにγ線照射により線膨
張係数が小さくなった。
As is clear from Table 2 above, the linear expansion coefficient was reduced by the irradiation with γ-rays.

参考例3 参考例1と同じサンプルを用いて、熱膨張率を測定し
た。熱膨張率は参考例2の同じ装置および条件で測定し
た。結果は膨張率(%)を縦軸にとり温度は横軸にとっ
た。グラフとして第1図に示す。
Reference Example 3 Using the same sample as Reference Example 1, the coefficient of thermal expansion was measured. The coefficient of thermal expansion was measured using the same device and conditions as in Reference Example 2. As a result, the expansion rate (%) was plotted on the vertical axis and the temperature was plotted on the horizontal axis. A graph is shown in FIG.

γ線照射したものは高温で軟化しなかったが、照射し
なかったものは高温で軟化した。γ線照射により耐熱性
が向上するかとが理解できる。
Those irradiated with γ-ray did not soften at high temperature, but those not irradiated softened at high temperature. It can be understood whether heat resistance is improved by γ-ray irradiation.

参考例4 参考例1と同じサンプルを用いて熱測定を行った。パ
ーキン・エルマー社製示差走査熱量計DSC−1B型を用い
て昇温温度20℃/分で30℃〜200℃まで行った。測定結
果を第2図に示す。
Reference Example 4 Thermal measurement was performed using the same sample as Reference Example 1. The temperature was raised from 30 ° C to 200 ° C at a temperature rising temperature of 20 ° C / minute using a differential scanning calorimeter DSC-1B type manufactured by Perkin-Elmer. The measurement results are shown in FIG.

吸熱ピークはγ線照射なしは58℃であり、10Mrad照射
は60℃、20Mrad照射は64℃であった。
The endothermic peak was 58 ° C without γ-ray irradiation, 60 ° C at 10Mrad irradiation and 64 ° C at 20Mrad irradiation.

参考例5 参考例1で用いたサンプルについて引っ張り試験を行
った。使用した試験機は株式会社インテスコから市販の
タイプ250を用いた。引っ張り速度は500mm/分であり測
定温度は50℃、20℃、−30℃であった。結果は以下の通
りであった。
Reference Example 5 A tensile test was performed on the sample used in Reference Example 1. The test machine used was a type 250 commercially available from Intesco Corporation. The pulling speed was 500 mm / min and the measurement temperatures were 50 ° C, 20 ° C and -30 ° C. The results were as follows.

γ線照射により破断応力値が増加した。 The rupture stress value increased by γ-ray irradiation.

実施例1 アイオノマー樹脂(三井ポリケミカル社からハイミラ
ン1601として市販)のシートを作成し、コンプレッショ
ンモールディング法でハーフシェルを作成した。ツーピ
ースボール内核コアにこのハーフシェルを被せて、スモ
ールサイズのゴルフボール金型内で約150℃で2.5分間成
型した。カバーの厚みは2.5mmであった。このボールを
γ線照射し、低温耐衝撃性を調べた。
Example 1 A sheet of ionomer resin (commercially available as Mimilan 1601 from Mitsui Polychemical Co., Ltd.) was prepared and a half shell was prepared by a compression molding method. A two-piece ball inner core was covered with this half shell, and molded in a small size golf ball mold at about 150 ° C. for 2.5 minutes. The cover had a thickness of 2.5 mm. This ball was irradiated with γ-ray to examine the low temperature impact resistance.

結果を以下の表−4に示す。 The results are shown in Table 4 below.

低温耐衝撃性:所定の温度に一昼夜保存後、45m/秒の速
度で衝突板に5回打撃し、これをワンサイクルとした。
再度所定の温度まで冷却し、さらに5回打撃しこれを8
回繰り返した。
Low temperature impact resistance: After being stored at a predetermined temperature for a whole day and night, the collision plate was hit 5 times at a speed of 45 m / sec, and this was used as one cycle.
Cool it down to the specified temperature again, hit it 5 more times, and
Repeated times.

γ線照射したゴルフボール用コアーを被覆するカバー
の低温耐久性は顕著に向上した。
The low temperature durability of the cover covering the core for the golf ball irradiated with γ rays was remarkably improved.

実施例2 アイオノマー樹脂(デュポン社製サーリン)でゴルフ
クラブインサートを射出成型し、これをγ線照射した
後、パーシモンヘッドに装着した。これを−10℃、−20
℃、−30℃のメタノール中に浸漬しておき、ゴルフボー
ル実射により耐溶剤クラック性および低温での対衝撃性
を試験した。
Example 2 A golf club insert was injection-molded with an ionomer resin (Surlyn, manufactured by DuPont), irradiated with γ rays, and then mounted on a Persimmon head. This is -10 ℃, -20
It was immersed in methanol at 30 ° C and -30 ° C, and tested for solvent crack resistance and impact resistance at low temperature by actual golf ball irradiation.

以上のようにγ線照射したゴルフクラブインサートの
耐溶剤クラック性および低温での対衝撃性は顕著に向上
した。
As described above, the solvent crack resistance and the impact resistance at low temperature of the γ-irradiated golf club insert were remarkably improved.

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

第1図は参考例2の熱膨張率(縦軸)と温度(横軸)の
関係を示すグラフである。 第2図は参考例4で測定した熱測定の結果を示す図であ
る。
FIG. 1 is a graph showing the relationship between the coefficient of thermal expansion (vertical axis) and temperature (horizontal axis) in Reference Example 2. FIG. 2 is a diagram showing the result of heat measurement measured in Reference Example 4.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】放射線照射を行ったアイオノマー樹脂で成
型された、ゴルフボール用コアーを被覆するカバーおよ
びゴルフクラブのインサートから成る群から選択される
ゴルフ用具用部材。
1. A member for golf equipment selected from the group consisting of a cover for covering a core for a golf ball and an insert for a golf club, which is molded from an ionomer resin which has been irradiated.
【請求項2】放射線量が1Mrad以上である第1項記載の
ゴルフ用具用部材。
2. The golf equipment member according to claim 1, wherein the radiation dose is 1 Mrad or more.
JP61161283A 1986-07-08 1986-07-08 Golf equipment parts Expired - Lifetime JPH085980B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61161283A JPH085980B2 (en) 1986-07-08 1986-07-08 Golf equipment parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61161283A JPH085980B2 (en) 1986-07-08 1986-07-08 Golf equipment parts

Publications (2)

Publication Number Publication Date
JPS6315832A JPS6315832A (en) 1988-01-22
JPH085980B2 true JPH085980B2 (en) 1996-01-24

Family

ID=15732160

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61161283A Expired - Lifetime JPH085980B2 (en) 1986-07-08 1986-07-08 Golf equipment parts

Country Status (1)

Country Link
JP (1) JPH085980B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6228940B1 (en) * 1996-02-06 2001-05-08 Spalding Sports Worldwide, Inc. Method of improving scuff and cut resistance of ionomer covered game ball
CA2195174C (en) * 1996-02-06 2006-07-25 Michael J. Sullivan Method of improving scuff and cut resistance of ionomer covered game ball

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5361667A (en) * 1976-11-16 1978-06-02 Sekisui Chemical Co Ltd Production of heat shrinkable film
JPS5375278A (en) * 1976-12-17 1978-07-04 Asahi Dow Ltd Production of heat shrinkable film

Also Published As

Publication number Publication date
JPS6315832A (en) 1988-01-22

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