WO2011001805A1 - Racket string, method for manufacturing same, and racket strung with same - Google Patents
Racket string, method for manufacturing same, and racket strung with same Download PDFInfo
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- WO2011001805A1 WO2011001805A1 PCT/JP2010/059790 JP2010059790W WO2011001805A1 WO 2011001805 A1 WO2011001805 A1 WO 2011001805A1 JP 2010059790 W JP2010059790 W JP 2010059790W WO 2011001805 A1 WO2011001805 A1 WO 2011001805A1
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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
- A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
- A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
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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
- A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
Definitions
- FIG. 9 is a plan view showing a state in which the flattened string created in Example 3 of the present invention (in the case of a gap interval of 1.0 mm) is stretched on a hard racket.
- FIG. 10 is a plan view showing a state where the flattened string created in Example 3 of the present invention (in the case of a gap interval of 0.9 mm) is stretched on a hard racket.
- FIG. 11 is a plan view showing a state in which the flattened string created in Example 4 (in the case of a gap interval of 1.0 mm) is stretched on a soft racket.
- FIG. 12 is a plan view showing a state in which the flattened string created in Example 4 of the present invention (in the case of a gap interval of 0.9 mm) is stretched on a soft racket.
- the term “twist” refers to a state in which the long diameter portion of the string is twisted by about 90 degrees from a state perpendicular to the racquet surface and becomes horizontal, and vice versa. In some cases, the twist may be about 180 degrees. In the present invention, it is preferable that about 10 to 100 such twisted portions are included in the racket surface.
- the number of twisted portions increases as the flatness increases. The string is twisted even when it is untwisted. (1) When unwinding from the coiled string, the so-called untwisting is inserted. (2) When the string end is inserted into the grommet, it is twisted.
- the flat surface of the string forms the main surface, the contact area with the ball or blade is increased and the resilience is improved.
- the uneven portion that is partially non-uniform due to twisting is likely to be spun because the long side portion of the flattened string faces the ball striking surface. As described above, there are preferably 10 to 100 uneven portions due to the twist.
- the present invention further includes a twisted portion generated on the racket surface, that is, a portion where the warp yarn or the weft yarn becomes vertical, and a twisted portion.
- a twisted portion generated on the racket surface that is, a portion where the warp yarn or the weft yarn becomes vertical
- a twisted portion When this twist is entered, the long diameter portion of the string is in a state of standing perpendicular to the racket surface, and an uneven structure is formed.
- This uneven portion is a characteristic when the string of the present invention is stretched on a racket, and improves resilience, softness and spin.
- FIG. 2 is an explanatory view of a process for manufacturing a flattened string according to an embodiment of the present invention
- FIG. 3 is a cross-sectional view of the string before flattening.
- the string 5 before processing shown in FIG. 3 is supplied from the wound body 4 to the heating device 6, passed between rollers 7 a and 7 b having a predetermined interval, and subjected to flattening deformation processing. It winds up on the take-up body 11. In this way, a substantially untwisted flattened string 10 is obtained.
- 12 is a core thread
- 13 is a side thread
- 14 is a coating resin.
- the method for producing a (flattened) string of the present invention may increase the number of steps because the number of flattening steps is increased as compared with a method for producing a normal round cross-section string.
- the method for producing the string of the present invention has the following characteristics.
- Example 3 (Comparative Example 3)
- the monofilament contains three island components, the island component is nylon 6 blended with 10% by weight of polyethylene terephthalate, and the sea component is nylon 6.
- Two round island trifilament monofilaments (0.89 mm diameter core yarn and 0. 195 mm side thread) was prepared.
- the three island monofilaments (core yarn) 16 were wound on the surface of the three island monofilaments (core yarn) at a twist number of 85 times / m, and the periphery thereof was coated with nylon 6 as a coating resin.
- the resulting string had a cross section of 1.32 mm in diameter.
- the main synthetic fiber (nylon 6) constituting the string had a glass transition point (Tg) of 40 ° C. and a melting point (Tm) of 215 ° C. This string is referred to as Comparative Example 3.
- this string 5 is supplied to the heating device 6 for 0.5 minutes at 80 ° C. and heated, and then the gap interval (also referred to as a gap gauge) is 0.9 mm or 1.0 mm.
- the gap interval also referred to as a gap gauge
- the cross-section of the resulting flat yarn string has a ratio of major axis / minor axis (flatness) of 1.42 when the gap interval is 0.9 mm and 1.28 when the gap interval is 1.0 mm. It was.
- These strings are referred to as Example 3.
- Example 4 (Comparative Example 4) Prepare one monofilament of nylon 6 with a diameter of 1 mm (core yarn) and 23 monofilaments of nylon 6 with a diameter of 0.14 mm (side yarn). After applying an adhesive to the surface of the core yarn, twist the number of side yarns. Winding was performed at 80 turns / m, and nylon 66 was coated as a binder coating resin around the periphery.
- the obtained string 5 had a diameter of 1.30 to 1.31 mm (round section).
- the main synthetic fiber (nylon 6) constituting the string had a glass transition point (Tg) of 40 ° C. and a melting point (Tm) of 215 ° C. This string is referred to as Comparative Example 4.
- FIGS. 11 to 12 show a state in which the obtained flattened string is stretched around a hard racket.
- FIG. 11 shows a hard racket stretched using a string obtained when the gap interval is 1.0 mm
- FIG. 12 shows a hard racket stretched using a string obtained when the gap interval is 0.9 mm.
- a black mark is a partially uneven portion due to twisting. The portion without the black mark is a region where the flat surface of the string forms the main surface. There were 32 uneven portions due to twist in FIG. 11 and 47 in FIG.
- the resulting string was coated with nylon 66 as a binder coating resin using a nozzle having an elliptical cross section.
- the cross section of the obtained coating string had a major axis of 1.47 mm and a minor axis of 1.08 mm (oval).
- the cross section of the resulting coating string had a major axis / minor axis ratio (flatness) of 1.36.
- the coating of the obtained coating string had a non-uniform film thickness.
- the obtained coating string was stretched on a hard racket.
- fluff and partial peeling occurred, and one of the three was severed.
- Example 1 About Example 1 and Comparative Example 1, processing conditions (gap spacing, heating temperature and time, winding speed), cross-section (dimensions and flatness) of the obtained string, physical properties (strength, elongation, intermediate) of the obtained string
- Table 1 summarizes the properties (stretchability, number of twisted portions after tension, and feel) when the obtained string is stretched on a gut.
- Example 5 (Comparative Example 6) After impregnating high-strength nylon 6 multifilament (made by Toray Industries, trade name “Amilan” 2100T-306f: 3 and 940T-136f: 1) with a UV curable resin as a core yarn, with a nozzle (1.1 mm ⁇ ) A core thread was made by applying a twist of 300 T / m and curing by UV irradiation. Nylon 6 was melt coated on the core yarn to produce a multifilament type round section string. The string had a diameter of 1.23 mm, a strength of 64 kg, an elongation of 24%, and a knot strength of 27 kg. This string is referred to as Comparative Example 6.
- This string was heated to 100 ° C. and flattened by passing between rollers with a gap of 1.10 mm.
- the obtained flattened string had a major axis of 1.44 mm, a minor axis of 1.12 mm and a flatness of 1.29.
- the string had a strength of 64 kg, an elongation of 26%, and a nodule strength of 29 kg.
- the obtained string is referred to as Example 5.
- the incident ball speed is 100 km / h
- the angle is 40 degrees (perpendicular) and the rotational speed is approximately 0 rpm
- the rotational speed of the rebounding ball is the average of 5 measurements
- the round cross-section string is 2930 rpm
- the flat string of this example had a high rotation speed of 3060 rpm and the ball, and the spin was well applied.
- the amount of sinking when the weight collided with the racket surface was measured by the resilience test method used for the resilience evaluation in Example 1, and the maximum sinking amount was 6 mm for the comparative example, and 9 mm for this example product. Thus, it was confirmed that the product of this Example had a larger sinking amount, that is, softer and better biting.
- the ball speed at the time of incidence is 40 km
- the angle is 40 degrees
- the rotational speed is approximately 0 rpm.
- the flat string of the product of this example had a high ball rotation speed of 3130 rpm and a good spin.
- the string of the present invention is useful for rackets such as hard tennis, soft tennis, badminton and squash.
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Abstract
Description
直径1mmのナイロン6のモノフィラメント1本(芯糸)と、直径0.115mmのナイロン6のモノフィラメント25本(側糸)を準備し、芯糸の表面に接着剤を付与後、側糸を撚り数80回/mで巻き付け、その周囲に被覆樹脂としてナイロン66を溶融コーティングした。得られたストリング5(図3)の直径は1.30~1.31mm(丸断面)であった。ストリングを構成する主要合成繊維(ナイロン6)のガラス転移点(Tg)は40℃、融点(Tm)は215℃であった。得られたストリング5を比較例1とする。 (Example 1), (Comparative Example 1)
Prepare one monofilament of
直径1.31mmのポリエチレンを5質量%ブレンドしたポリエチレンテレフタレートのモノフィラメントを使用した。ストリングを構成する主要合成繊維(ポリエチレンテレフタレート)のガラス転移点(Tg)は70℃、融点(Tm)は260℃であった。このストリングを比較例2とする。 (Example 2), (Comparative Example 2)
A polyethylene terephthalate monofilament blended with 5% by mass of polyethylene having a diameter of 1.31 mm was used. The main synthetic fiber (polyethylene terephthalate) constituting the string had a glass transition point (Tg) of 70 ° C. and a melting point (Tm) of 260 ° C. This string is referred to as Comparative Example 2.
モノフィラメントの中に3島成分を含み、島成分はポリエチレンテレフタレートを10質量%ブレンドしたナイロン6、海成分はナイロン6である丸断面3島モノフィラメント2種(直径0.89mmの芯糸および直径0.195mmの側糸)を準備した。この3島モノフィラメント1本(芯糸)の表面に、前記3島モノフィラメント16本(側糸)を撚り数85回/mで巻き付け、その周囲に被覆樹脂としてナイロン6をコーティングした。得られたストリングの断面は直径1.32mmであった。ストリングを構成する主要合成繊維(ナイロン6)のガラス転移点(Tg)は40℃、融点(Tm)は215℃であった。このストリングを比較例3とする。 (Example 3), (Comparative Example 3)
The monofilament contains three island components, the island component is
直径1mmのナイロン6のモノフィラメント1本(芯糸)と、直径0.14mmのナイロン6のモノフィラメント23本(側糸)を準備し、芯糸の表面に接着剤を付与後、側糸を撚り数80回/mで巻き付け、その周囲にバインダー被覆樹脂としてナイロン66をコーティングした。得られたストリング5の直径は1.30~1.31mm(丸断面)であった。ストリングを構成する主要合成繊維(ナイロン6)のガラス転移点(Tg)は40℃、融点(Tm)は215℃であった。このストリングを比較例4とする。 (Example 4), (Comparative Example 4)
Prepare one monofilament of
断面が長径1.23mm、短径0.75mmの長円形のナイロン6モノフィラメント1本(芯糸)と、直径0.115mmのナイロン6のモノフィラメント25本(側糸)を準備し、ナイロン6をフェノール系溶剤に溶解させた接着剤を用いて、芯糸の表面に側糸を撚り数80回/mで巻き付け接着し乾燥させた。得られたストリングの断面は長径1.45mm、短径1.03mm(長円)であった。得られたストリングの断面は、長径/短径の比(扁平度)が1.45であった。ストリングを構成する主要合成繊維(ナイロン6)のガラス転移点(Tg)は40℃、融点(Tm)は215℃であった。なお、この段階で芯と側糸との接着にむらが発生し、また、扁平部分では側糸間の隙間が大きかった。これは、芯の断面が扁平長円形であるため、接着剤の付着状態、芯と側糸との圧着状態、巻きつけ角度などにおいて、不均一かつ不安定であるためと考えられる。 (Comparative Example 5)
Prepare one
スピン性は、850rpm(R1)で回転するボールを400mmから張設したガット(1本)に落下させ、ガット面と接触後10ms後の回転数(R2)と用いて、下記の式に従い算出した。このスピン性が大きいことは、ボールとガットの摩擦が大きいことを意味し、すなわち、スピンがよくかかることを意味する。 Rebound rate (%) = (H / 200) × 100
The spin property was calculated according to the following formula using a ball rotating at 850 rpm (R1), dropped on a gut (one piece) stretched from 400 mm, and the rotational speed (R2) 10 ms after contact with the gut surface. . The large spin property means that the friction between the ball and the gut is large, that is, spin is often applied.
表1に示すように、実施例1及び比較例1の結果から、本実施例のストリングが、反発性とスピン性において向上していることが確認できた。 Spin property (rpm) = R1-R2
As shown in Table 1, it was confirmed from the results of Example 1 and Comparative Example 1 that the string of this example was improved in resilience and spin properties.
芯糸として高強力ナイロン6マルチフィラメント(東レ社製、商品名“アミラン”2100T-306f:3本と940T-136f:1本)をUV硬化樹脂で含浸させたあと、ノズル(1.1mmφ)で絞り300T/mのよりを掛けUV照射して硬化させ芯糸とした。この芯糸にナイロン6を溶融コーティングして、マルチフィラメントタイプの丸断面ストリングを作製した。このストリングの直径は1.23mm、強力64kg、伸度24%、結節強力27kgであった。このストリングを比較例6とする。 (Example 5), (Comparative Example 6)
After impregnating high-
ポリエチレンテレフタレート樹脂(IV=1.1)を用いて、断面が丸形状のモノフィラメントを扁平化加工したストリングと、略長方形の紡糸口金を用いて同条件で紡糸延伸した、ほぼ同じ扁平断面形状のストリングを作製し、比較した。 (Example 6), (Comparative Example 7)
A string in which a monofilament having a round cross section is flattened using polyethylene terephthalate resin (IV = 1.1), and a string having substantially the same flat cross section shape, which is spun and stretched under the same conditions using a substantially rectangular spinneret. Were made and compared.
2,13 側糸(巻き付け糸)
3,14 被覆樹脂
4 巻き糸体
5 処理前のストリング
6 加熱装置
7a,7b ローラー7a,7b
10 扁平化ストリング
11 巻き取り体 1,12 Core yarn (monofilament)
2,13 Side thread (winding thread)
3,14
10 Flattened
Claims (10)
- 合成繊維を含むラケット用ストリングであって、
ストリング形成後加熱圧縮変形により断面が扁平化され、いずれかの部分には圧痕を有し、
前記扁平化されたストリングは、実質的に無撚の状態で巻かれていることを特徴とするラケット用ストリング。 A string for rackets containing synthetic fibers,
After string formation, the cross section is flattened by heat compression deformation, and there is an impression in any part,
The flattened string is wound in a substantially untwisted state. - 前記扁平化されたストリングの断面は、長径/短径の比(扁平度)が1.1~1.8の範囲である請求項1に記載のラケット用ストリング。 The racket string according to claim 1, wherein the cross section of the flattened string has a major axis / minor axis ratio (flatness) in a range of 1.1 to 1.8.
- 前記合成繊維が熱可塑性ポリアミド、熱可塑性ポリエステルから選ばれた1種以上である請求項1に記載のラケット用ストリング。 The racket string according to claim 1, wherein the synthetic fiber is at least one selected from thermoplastic polyamide and thermoplastic polyester.
- 前記ストリングが、モノフィラメントからなる芯糸と、前記芯糸の周囲の側糸と、前記芯糸と前記側糸を一体化しているコーティング樹脂を含み、主として前記芯糸が扁平化している請求項1~3のいずれか1項に記載のラケット用ストリング。 The said string contains the core yarn which consists of a monofilament, the side yarn around the said core yarn, and the coating resin which integrated the said core yarn and the said side yarn, The said core yarn is mainly flattened. 4. The racket string according to any one of items 1 to 3.
- 前記芯糸のモノフィラメントが熱可塑性ポリアミドである請求項4に記載のラケット用ストリング。 The racket string according to claim 4, wherein the monofilament of the core yarn is a thermoplastic polyamide.
- 前記合成繊維が熱可塑性ポリエステルであり、ストリング構造がモノフィラメント単体またはモノフィラメント単体にコーティングした構造である請求項1に記載のラケット用ストリング。 The racket string according to claim 1, wherein the synthetic fiber is a thermoplastic polyester, and the string structure is a monofilament simple substance or a structure in which a monofilament simple substance is coated.
- 請求項1~6のいずれか1項に記載のラケット用ストリングの製造方法であって、
ストリングを構成する主要合成繊維のガラス転移点をTg(℃),融点をTm(℃)としたとき、Tg(℃)以上、Tm-10(℃)以下の温度に加熱し、所定の間隔を有するローラー間でストリングを圧縮変形し、その後冷却して巻き取ることを特徴とするラケット用ストリングの製造方法。 A method for producing a racket string according to any one of claims 1 to 6,
When the glass transition point of the main synthetic fiber constituting the string is Tg (° C.) and the melting point is Tm (° C.), the string is heated to a temperature of Tg (° C.) or more and Tm−10 (° C.) or less. A method for producing a string for a racket, characterized in that the string is compressed and deformed between rollers, and then cooled and wound. - 圧縮変形するローラー間の隙間を圧縮前ストリング径の0.55~0.90倍の間隔として圧縮変形加工し、得られた扁平ストリングの短径を圧縮前の0.65~0.95倍とする請求項7に記載のストリングの製造方法。 The gap between the rollers to be compressed and deformed is compressed and deformed with an interval 0.55 to 0.90 times the string diameter before compression, and the resulting flat string has a short diameter of 0.65 to 0.95 times before compression. The manufacturing method of the string of Claim 7.
- 請求項1~6のいずれかに記載のラケット用ストリングを張設したラケットであって、
ラケット打球面上において、前記ストリングは扁平面が主面を形成し、捩れによる部分的に不均一な凹凸部を有することを特徴とするラケット。 A racket in which the string for the racket according to any one of claims 1 to 6 is stretched,
The racket is characterized in that, on the racket striking surface, the string has a flat surface as a main surface and has uneven portions that are partially uneven due to twisting. - 前記捩れによる凹凸部が、10~100箇所存在する請求項9に記載のラケット。 The racket according to claim 9, wherein there are 10 to 100 uneven portions due to the twist.
Priority Applications (4)
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EP10793975A EP2377583A1 (en) | 2009-06-30 | 2010-06-09 | Racket string, method for manufacturing same, and racket strung with same |
US13/059,434 US20110136601A1 (en) | 2009-06-30 | 2010-06-09 | Racket string and method for producing the same and racket strung with the same |
CN201080003005XA CN102196840A (en) | 2009-06-30 | 2010-06-09 | Racket string, method for manufacturing same, and racket strung with same |
JP2010535153A JP4713692B2 (en) | 2009-06-30 | 2010-06-09 | Racket string, manufacturing method thereof, and racket with the same |
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JP6812053B2 (en) * | 2016-04-27 | 2021-01-13 | ヨネックス株式会社 | String set, strings for warp and strings for weft |
ES2776389T3 (en) * | 2017-06-21 | 2020-07-30 | Speed France S A S | Monofilament string for a racket and procedure for making said monofilament string |
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JP2002115142A (en) * | 2000-08-04 | 2002-04-19 | Kumagai Fibers Kk | Flat yarn and method for manufacturing the same |
JP2003020532A (en) * | 2001-07-11 | 2003-01-24 | Kawabou Textured Kk | Slub flattened yarn, woven fabric and knitted fabric given by using the same |
US20040213786A1 (en) * | 2001-08-24 | 2004-10-28 | Rappaport Family Institute For Research In The Medical Sciences | Compositions and methods for treating T-cell mediated autoimmune diseases |
JP4501624B2 (en) * | 2004-09-30 | 2010-07-14 | 東レ株式会社 | Airbelt base fabric and manufacturing method thereof |
JP2007330772A (en) * | 2006-05-17 | 2007-12-27 | Toray Monofilament Co Ltd | String for racket |
-
2010
- 2010-06-09 KR KR1020117004947A patent/KR20120034068A/en not_active Application Discontinuation
- 2010-06-09 US US13/059,434 patent/US20110136601A1/en not_active Abandoned
- 2010-06-09 JP JP2010535153A patent/JP4713692B2/en not_active Expired - Fee Related
- 2010-06-09 WO PCT/JP2010/059790 patent/WO2011001805A1/en active Application Filing
- 2010-06-09 EP EP10793975A patent/EP2377583A1/en not_active Withdrawn
- 2010-06-09 CN CN201080003005XA patent/CN102196840A/en active Pending
- 2010-06-22 TW TW099120193A patent/TW201103606A/en unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6077776A (en) | 1983-10-03 | 1985-05-02 | 株式会社ゴーセン | Gut |
JPH0345732A (en) * | 1989-07-11 | 1991-02-27 | Mitsubishi Rayon Co Ltd | Composite flat yarn |
JP2000210396A (en) | 1999-01-27 | 2000-08-02 | Bridgestone Sports Co Ltd | Strings |
JP2005348851A (en) | 2004-06-09 | 2005-12-22 | Toray Monofilament Co Ltd | String for racket |
JP2008048867A (en) * | 2006-08-24 | 2008-03-06 | Gosen:Kk | Filament for racket string, racket string using the filament and manufacturing method therefor |
JP2008099859A (en) * | 2006-10-19 | 2008-05-01 | Asahi Kasei Fibers Corp | String |
JP2009050660A (en) | 2007-08-23 | 2009-03-12 | Yoshiro Kinoshita | String for racket |
JP2009061151A (en) * | 2007-09-07 | 2009-03-26 | Asahi Kasei Fibers Corp | Gut |
Also Published As
Publication number | Publication date |
---|---|
JP4713692B2 (en) | 2011-06-29 |
KR20120034068A (en) | 2012-04-09 |
US20110136601A1 (en) | 2011-06-09 |
JPWO2011001805A1 (en) | 2012-12-13 |
TW201103606A (en) | 2011-02-01 |
EP2377583A1 (en) | 2011-10-19 |
CN102196840A (en) | 2011-09-21 |
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