JPS62112575A - Yarn wound core golf ball - Google Patents

Yarn wound core golf ball

Info

Publication number
JPS62112575A
JPS62112575A JP60251985A JP25198585A JPS62112575A JP S62112575 A JPS62112575 A JP S62112575A JP 60251985 A JP60251985 A JP 60251985A JP 25198585 A JP25198585 A JP 25198585A JP S62112575 A JPS62112575 A JP S62112575A
Authority
JP
Japan
Prior art keywords
aqueous solution
polyvinyl alcohol
organic compound
golf ball
thread
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.)
Pending
Application number
JP60251985A
Other languages
Japanese (ja)
Inventor
脩 桑原
南部　昌生
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.)
Eneos Corp
Original Assignee
Nippon Oil Corp
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 Nippon Oil Corp filed Critical Nippon Oil Corp
Priority to JP60251985A priority Critical patent/JPS62112575A/en
Priority to GB8627057A priority patent/GB2182571B/en
Publication of JPS62112575A publication Critical patent/JPS62112575A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • A63B37/005—Cores
    • A63B37/0051—Materials other than polybutadienes; Constructional details
    • A63B37/0052—Liquid cores
    • 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
    • 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
    • A63B37/0074—Two piece balls, i.e. cover and core
    • 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
    • A63B37/02—Special cores
    • A63B37/08—Liquid cores; Plastic cores
    • A63B2037/085—Liquid cores; Plastic cores liquid, jellylike

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は糸巻芯ゴルフボールに関し、更に詳細には高含
水ゲルの球体をセンターとする糸巻芯ゴルフボールに関
する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a thread-wound core golf ball, and more particularly to a thread-wound core golf ball having a sphere of high water content gel as its center.

〈従来の技術及び問題点〉 糸巻芯ゴルフボールでは、芯材（センター）に糸ゴムを
巻付けるが、この芯材としては加硫ゴム球からなる固体
芯材ならびに金属塩水溶液又はペーストを封入した加硫
ゴム袋からなる液体芯材が公知である。前者（固体芯材
）を用いた糸巻芯ゴルフボールは飛行距離に勝るが、打
撃感及び直線飛行性に劣る。後者（液体芯材）を用いた
糸巻芯ゴルフボールは打撃感及び直線飛行性に勝るが、
固体芯材の場合に比し、飛行距離が劣る。また上記の液
体封入芯材は、糸ゴムにより巻かれて、約１トンの圧縮
荷重を受けているため、使用中のゴルフボールの損傷に
伴い、加硫ゴム袋内の生体に有害な液体が激しく噴出し
、眼球、顔面、着衣などを損傷するなどの問題があった
。<Prior art and problems> In a thread-wound core golf ball, a thread rubber is wound around a core material (center). Liquid core materials consisting of vulcanized rubber bags are known. A thread-wound core golf ball using the former (solid core material) has superior flight distance, but is inferior in hitting feel and straight flight performance. A thread-wound core golf ball using the latter (liquid core material) has better feel at impact and straight flight, but
The flight distance is inferior to that of a solid core material. In addition, the above-mentioned liquid-filled core material is wrapped with rubber thread and is subjected to a compressive load of about 1 ton, so if the golf ball is damaged during use, the liquid inside the vulcanized rubber bag may be released. It erupted violently, causing problems such as damage to the eyes, face, and clothing.

この点に配慮して、有害液体を用いることなく。With this in mind, we do not use harmful liquids.

各種含水ゲルを疎水性高分子弾性体（袋）で被覆した芯
材を用いた糸巻芯ゴルフボールが提案された（特開昭６
Ｏ−１６５９６６）。これにより、ゴルフボールが傷つ
れられても、内容液が噴出することは回避されたが、固
体芯材を用いた糸巻芯ゴルフボールに比し、反発性に劣
り、また既存の含水ゲルは全て軟弱なため、直接糸ゴム
に巻きつけることができず、従来の液体芯材の場合と同
様に含水ゲルを未加硫ゴムにより被覆し、その後加硫し
、次いでこれを氷結・固化後、これに糸ゴムを巻きつけ
るなどの複雑な工程が必要である。A thread-wound core golf ball using a core material made of various hydrogels covered with a hydrophobic polymeric elastomer (bag) was proposed (Japanese Patent Laid-Open No.
O-165966). This prevents the liquid content from spewing out even if the golf ball is damaged, but it has inferior repulsion compared to a thread-wound core golf ball that uses a solid core material, and all existing hydrogels Because it is too weak, it cannot be wrapped directly around a rubber thread, so as with conventional liquid core materials, the hydrous gel is covered with unvulcanized rubber, then vulcanized, and then frozen and solidified. It requires complicated processes such as wrapping rubber thread around the material.

〈発明の目的〉 本発明の目的は被覆不要の芯材を用い、しかも、液体芯
材のゴルフボールと同様の打撃感及び直線飛行性を示し
、しかも従来の固体芯材を用いたゴルフボールと同様の
飛行距離が得られる糸巻芯ゴルフボールを提供すること
にある。本発明の他の目的はボールの損傷時に、内容液
が噴出しない、安全性の極めて高い糸巻芯ゴルフボール
を提供することにある。更に、本発明の別の目的は被覆
不要で、しかも糸ゴムを直接巻付けることのできる簡便
製造法による糸巻芯ゴルフボールを提供することにある
。<Object of the Invention> The object of the present invention is to use a core material that does not require a coating, to provide the same feel at impact and straight flight as golf balls with a liquid core material, and to provide the same feel and straight flight characteristics as golf balls with a conventional solid core material. An object of the present invention is to provide a thread-wound core golf ball capable of achieving similar flight distances. Another object of the present invention is to provide a thread-core golf ball with extremely high safety, in which the liquid content does not gush out when the ball is damaged. Still another object of the present invention is to provide a thread-wound core golf ball that can be produced simply and without the need for a coating and in which a rubber thread can be directly wound.

〈問題点を解決するための手段〉 本発明によれば、けん化度９５モル％以上、平均重合度
７００以上のポリビニルアルコール（ＰＶＡ）及びＰＶ
Ａと異なる水溶性有機化合物とを含み、且つ、ｌ咳ポリ
ビニルアルコールの濃度が５すＬ％を超え、４０ｗｔ％
以下、該有機化合物の濃度Ｏ〜３０ｗｔ％に調整された
水溶液またはｌＩ！濁水溶液１００重量部に対し、比重
が１より大なる充填剤を５〜４０重量部配合した水溶液
またはｌｊ５濁水溶液を、成型用鋳型へ注入後、これを
−１０℃以下の温度しこ冷却・固化し、次にこれを解凍
する一連の凍結・解凍操作を反復して、累積凍結回数を
２〜８とすることにより得られる高含水ゲルの球体へ、
直接糸ゴムを巻いてなる糸巻芯ゴルフボールが提供され
る（以下、第１発明と称す）。<Means for solving the problems> According to the present invention, polyvinyl alcohol (PVA) and PV having a saponification degree of 95 mol% or more and an average polymerization degree of 700 or more
A and a different water-soluble organic compound, and the concentration of polyvinyl alcohol exceeds 5L% and 40wt%
Hereinafter, an aqueous solution or lI! of the organic compound whose concentration is adjusted to 0 to 30 wt% will be described. An aqueous solution containing 5 to 40 parts by weight of a filler with a specific gravity of more than 1 to 100 parts by weight of the turbid water solution or an lj5 turbid aqueous solution is poured into a mold for molding, and then cooled to a temperature of -10°C or less. By repeating a series of freezing and thawing operations to solidify and then thaw this, the cumulative number of times of freezing is 2 to 8, resulting in high water content gel spheres,
A thread-wound core golf ball formed by directly winding a rubber thread is provided (hereinafter referred to as the first invention).

また、本発明によれば、けん化度９５モル％以上、平均
重合度７００以上のポリビニルアルコール（ＰＶＡ）を
含み、該ポリビニルアルコールの濃度が５ｔｙｔ％を超
え、４０ｗｔ％以下に調整された水溶液または）？濁水
溶液１００重量部に対し、比重が１より大なる充填剤を
５〜４ｏ重量部配合した水溶液または）鵠濁水溶液を、
成型用鋳型へ注入後、これを−１０’Ｃ以下の温度に冷
却・固化し、次にこれを解凍する一連の凍結・解凍操作
を反復して、累積凍結回数を２〜８回とすることにより
得られる高含水ゲルの球体をＰＶＡと異なる水溶性有機
化合物に接触させることにより、ゲル内に該有機化合物
を５〜３０ｗｔ％含ませた高含水ゲルの球体とし、これ
に直接糸ゴムを巻いてなる糸巻芯ゴルフボールが提供さ
れる（以下、第２発明と称す）。Further, according to the present invention, an aqueous solution containing polyvinyl alcohol (PVA) having a saponification degree of 95 mol% or more and an average polymerization degree of 700 or more, and in which the concentration of the polyvinyl alcohol is adjusted to be more than 5 tyt% and 40 wt% or less. ? An aqueous solution containing 5 to 4 parts by weight of a filler with a specific gravity of more than 1 per 100 parts by weight of a turbid aqueous solution, or a turbid aqueous solution,
After pouring into a mold, it is cooled and solidified to a temperature of -10'C or below, and then thawed. A series of freezing and thawing operations is repeated to make the cumulative number of freezing times 2 to 8 times. By contacting the high water content gel sphere obtained by contacting with a water-soluble organic compound different from PVA, a high water content gel sphere containing 5 to 30 wt% of the organic compound in the gel is obtained, and a rubber thread is directly wrapped around this. A wound core golf ball is provided (hereinafter referred to as the second invention).

以下１本発明につき、更に詳細に説明する。The present invention will be explained in more detail below.

本発明ではポリビニルアルコールを原料として製造した
高含水ゲルを用いる。本発明に用いるポリビニルアルコ
ール（ＰＶＡ）は、そのけん化度が９５モル％以上、好
ましくは９６モル％以上を要する。また、本発明に用い
るポリビニルアルコールの重合度は、７００以上を要す
る。重合度５００未満、特に３００以下では粘稠液また
は軟弱ゲルが生成するにすぎない。本発明においては、
例えば重合度８００〜３，３００程度のポリビニルアル
コールが使用できるが、通常重版されている高重合度品
（重合度１，０００〜２，６００）用いるのが最も良い
。本発明の第１発明では、まず、前述のポリビニルアル
コール及びＰＶＡと異なる水溶性有機化合物を含む水溶
液を調製する。In the present invention, a high water content gel manufactured using polyvinyl alcohol as a raw material is used. The polyvinyl alcohol (PVA) used in the present invention requires a degree of saponification of 95 mol% or more, preferably 96 mol% or more. Further, the degree of polymerization of the polyvinyl alcohol used in the present invention is required to be 700 or more. If the degree of polymerization is less than 500, especially less than 300, only a viscous liquid or a soft gel will be produced. In the present invention,
For example, polyvinyl alcohol with a polymerization degree of about 800 to 3,300 can be used, but it is best to use a high polymerization degree product (with a polymerization degree of 1,000 to 2,600) that is usually reprinted. In the first aspect of the present invention, first, an aqueous solution containing a water-soluble organic compound different from the aforementioned polyvinyl alcohol and PVA is prepared.

ポリビニルアルコールの濃度としては、５ｔｉｔ％を超
え４０ｗｔ％以下、好ましくは１０〜３Ｑｗｔ％とする
。５ｗｔ％未満では軟弱すぎて芯材として用いることが
できず、また一方４Ｑｗｔ％を超えると硬すぎて反発性
に劣る。The concentration of polyvinyl alcohol is more than 5 tit% and 40 wt% or less, preferably 10 to 3 Qwt%. If it is less than 5wt%, it is too soft to be used as a core material, while if it exceeds 4Qwt%, it is too hard and has poor resilience.

また、上記水溶性有機化合物の濃度としては０〜３０ｗ
ｔ％、好ましくは５〜２５ｗｔ％とする。その含有量が
少ないと、糸ゴムを巻付ける際の糸との粘着を回避し難
いうえ、芯材の比重が低く１反発性が不足する。また、
３０νｔ％を超えるとポリビニルアルコールのゲル化操
作が困難である。この水溶性有機化合物としてはエチレ
ングリコール。In addition, the concentration of the water-soluble organic compound is 0 to 30w.
t%, preferably 5 to 25 wt%. If the content is small, it is difficult to avoid adhesion with the thread when the thread rubber is wound, and the specific gravity of the core material is low, resulting in insufficient resilience. Also,
If it exceeds 30 νt%, it will be difficult to gel the polyvinyl alcohol. This water-soluble organic compound is ethylene glycol.

プロピレングリコール、Ｄソルビトール、グリセリンな
どの多価アルコールが代表的なものである。Typical examples include polyhydric alcohols such as propylene glycol, D-sorbitol, and glycerin.

また、蔗糖、寒天、アガロース、アルブミン、アルギン
酸およびその誘導体、カードラン、カラゲナン、カゼイ
ン、ＣＭ　Ｃ（ｓｏｄｉｕｍ　ｃｅｌｌｕｌｏｓｅ　ｇ
ｌｙ−ｃｏｌａｔｅ）　、ファーセレラン、ゼラチン、
メチルセルロース、ペクチン、澱粉、タマリンドガム、
トラガントガム、ザンタンガム、グアールガムなどの多
糖類または蛋白質も使用されるが、得られる芯材の粘着
防止、機械的強度等を考慮すると、エチレングリコール
、プロピレングリコールさらにはグリセリン、Ｄ−ソル
ビトールなどの多価アルコール特に分子中に２〜６の水
酸基を有する水溶性有機化合物が最もか好ましい。In addition, sucrose, agar, agarose, albumin, alginic acid and its derivatives, curdlan, carrageenan, casein, CMC (sodium cellulose g)
ly-colate), furceleran, gelatin,
Methylcellulose, pectin, starch, tamarind gum,
Polysaccharides or proteins such as tragacanth gum, xanthan gum, and guar gum are also used, but in consideration of the adhesion prevention and mechanical strength of the resulting core material, ethylene glycol, propylene glycol, and polyhydric alcohols such as glycerin and D-sorbitol are used. In particular, water-soluble organic compounds having 2 to 6 hydroxyl groups in the molecule are most preferred.

ポリビニルアルコール及びＰＶＡと異なる水溶性有機化
合物を含む水溶液または懸濁水溶液を調製するには、水
中ヘポリビニルアルコールと該水溶性有機化合物とを添
加・溶解・懸濁させる方式のほか、あらかじめ水中ヘボ
リビニルアルコールを溶解し、しかる後、これを該水溶
性有機化合物（またはその水溶液）と混合する方式、あ
るいは該水溶性有機化合物（またはその水溶液）へポリ
ビニルアルコール水溶液またはポリビニルアルコール粉
末を添加・溶解・懸濁させる方式などを採ることができ
、いずれの方式においても、最終的に、ポリビニルアル
コール濃度が５ｖｔ％を超え、４０ｗｔ％以下、該水溶
性有機化合物濃度０〜３゜讐ｔ％に調製する。To prepare an aqueous solution or suspended aqueous solution containing a water-soluble organic compound different from polyvinyl alcohol and PVA, in addition to adding, dissolving, and suspending polyvinyl alcohol and the water-soluble organic compound in water, you can prepare the water-soluble organic compound in water in advance. A method in which vinyl alcohol is dissolved and then mixed with the water-soluble organic compound (or its aqueous solution), or a polyvinyl alcohol aqueous solution or polyvinyl alcohol powder is added, dissolved, or added to the water-soluble organic compound (or its aqueous solution). A suspension method can be adopted, and in either method, the final concentration of polyvinyl alcohol is adjusted to be more than 5% by weight and less than 40% by weight, and the concentration of the water-soluble organic compound is adjusted to 0 to 3% by weight. .

次いで、このポリビニルアルコール及び水溶性有機化合
物を含む水溶液又は想濁水溶液１００重量部に対して、
比重が１より大なる充填剤５〜４０重量部、好ましくは
１０〜３０重量部を配合する。充填剤の配合割合が５重
量部未満では比重が過小のため、ゴルフボールの飛行距
煎が短くなり、またこれが４０ｗｔ％を超えると重すぎ
て打撃感が悪い。充填剤の種別としては比重が１より大
きく、しかも、ポリビニルアルコールのゲル化に悪影響
を及ぼさないかぎり、特に制約されない。具体的には、
硫酸バリウム、亜鉛粉末、ガラス粉末、炭酸カルシウム
、シリカ、酸化チタンなどの無機充填剤、並びにアクリ
ル酸亜鉛、メタクリル酸亜鉛、ステアリン酸亜鉛などの
有機充填剤を挙げることができる。Next, with respect to 100 parts by weight of the aqueous solution or cloudy aqueous solution containing this polyvinyl alcohol and the water-soluble organic compound,
5 to 40 parts by weight, preferably 10 to 30 parts by weight of a filler having a specific gravity greater than 1 is blended. If the blending ratio of the filler is less than 5 parts by weight, the specific gravity is too low, resulting in a short flight distance of the golf ball, and if it exceeds 40 wt%, it is too heavy and gives a poor feel on impact. The type of filler is not particularly limited as long as it has a specific gravity of more than 1 and does not adversely affect the gelation of polyvinyl alcohol. in particular,
Mention may be made of inorganic fillers such as barium sulfate, zinc powder, glass powder, calcium carbonate, silica, titanium oxide, and organic fillers such as zinc acrylate, zinc methacrylate, and zinc stearate.

本発明の第１発明ではかようにして得られたポリビニル
アルコール、水溶性有機化合物及び比重が１より大なる
充填剤を含む水溶液又は懸濁水溶液を形成用鋳型へ注入
し、−１０℃以下に冷却・固化し、次いで解凍する。こ
の凍結・解凍の一連の操作を反復し、累積凍結回数を２
〜８とすることにより、本発明に供しうる高含水ゲル（
ゴム）の球体を得ることができる。累積凍結回数を高め
るとともに、得られる高含水ゴムの硬度も向上するが、
累積凍結回数９以降は、その効果がほぼ消失すること（
南部昌生、高分子下降、３２．５２３（１９８３））か
ら、上述の２〜８が経済的である。In the first aspect of the present invention, the aqueous solution or suspended aqueous solution containing polyvinyl alcohol, a water-soluble organic compound, and a filler having a specific gravity of more than 1 is injected into a forming mold and heated to -10°C or lower. Cool and solidify, then thaw. Repeat this series of freezing and thawing operations to increase the cumulative number of freezes to 2.
~8, the high water content gel that can be used in the present invention (
Rubber) spheres can be obtained. In addition to increasing the cumulative number of freezing times, the hardness of the resulting high water content rubber also improves;
After the cumulative number of freezes exceeds 9, the effect almost disappears (
According to Masao Nambu, Polymer Descent, 32.523 (1983)), 2 to 8 above are economical.

前記成型用鋳型としては、例えば直径２０ｎｎ〜３５ｍ
ｍ、好ましくは２８−３４　ｍｎの球体が得られるもの
であれば特に制約はない。The mold for molding has a diameter of 20 nn to 35 m, for example.
There is no particular restriction as long as a sphere of m, preferably 28-34 mn can be obtained.

本発明の第２発明では、前述の水溶性有機化合物を含ま
ないポリビニルアルコールの水溶液または懸濁水溶液を
調製し、充填剤を配合後成形用鋳型へ注入し、第１発明
と同様の凍結・解凍操作により高含水の球体を得る。使
用する原料並びに条件等は第１発明と同様である。In the second invention of the present invention, an aqueous solution or suspension aqueous solution of polyvinyl alcohol containing no water-soluble organic compounds as described above is prepared, a filler is mixed therein, and then injected into a mold for molding, followed by freezing and thawing in the same manner as in the first invention. The operation yields highly water-containing spheres. The raw materials and conditions used are the same as in the first invention.

第２発明では、高含水ゲルの球体をＰＶＡと異なる水溶
性有機化合物と接触して高含水ゲル中の水の一部を有機
化合物と置換させる方式により、高含水ゲルに有機化合
物を含ませる。水溶性有機化合物との接触操作は、水溶
性有機化合物の水溶液または懸濁液に高含水ゲルの球体
を浸漬することにより容易に行なうことができ、水溶性
有機化合物と水との置換に伴い、球体の体積は減少し、
反発性が増強される。In the second invention, the organic compound is contained in the high water content gel by contacting the spheres of the high water content gel with a water-soluble organic compound different from PVA to replace part of the water in the high water content gel with the organic compound. The contact operation with the water-soluble organic compound can be easily carried out by immersing the spheres of high water content gel in an aqueous solution or suspension of the water-soluble organic compound, and as the water-soluble organic compound and water are replaced, The volume of the sphere decreases,
Repulsion is enhanced.

第１発明による場合は、製造過程の高含水ゲル球体の凍
結・固化状態において、直ちに糸ゴムを直接巻付けるこ
とができるので、公知方法の場合のようにあらかじめ芯
材製造後これを凍結・固化させるには及ばないが５、第
２発明による場合には、あらかじめ高含水ゲルの球体を
得、これを凍結後、これに糸ゴムを巻付ける。糸ゴムと
してはゴルフボール用糸ゴムとして一般に用いられるも
のを使用することができる。外皮材としてはバラタ（天
然系トランスポリイソプレン）、アイオノマー樹脂等の
公知の材料を使用することができる。In the case of the first invention, the thread rubber can be directly wrapped around the high water content gel spheres in the frozen/solidified state during the manufacturing process, so the core material is produced in advance and then frozen/solidified as in the case of the known method. 5. In the case of the second invention, spheres of high water content gel are obtained in advance, frozen, and then a rubber thread is wrapped around them. As the rubber thread, rubber threads commonly used for golf balls can be used. As the outer skin material, known materials such as balata (natural transpolyisoprene) and ionomer resin can be used.

本発明のゴルフボールのセンター、糸ゴム、外皮などの
各構造の厚さ、直径等は特に制限されるものではなく、
ボールサイズ１．６２インチ、　１．６８インチのいず
れのものにも上述の含水ゲルの球体をセンターとして用
いることができる。The thickness, diameter, etc. of each structure such as the center, rubber thread, and outer skin of the golf ball of the present invention are not particularly limited.
The above-mentioned hydrogel sphere can be used as a center for both ball sizes of 1.62 inches and 1.68 inches.

〈発明の効果〉 本発明によれば、打撃感、直線飛行性、飛距離のいずれ
においても優れ、しかもボール損傷時の安全性が高く且
つ簡便製造可能な糸巻芯ゴルフボールを得ることができ
る。<Effects of the Invention> According to the present invention, it is possible to obtain a thread-wound core golf ball that is excellent in all of hitting feel, straight flight performance, and flight distance, has high safety when the ball is damaged, and can be manufactured easily.

〈実施例〉 以下、本発明をその実施例につき説明する。なお、％及
び部は重量基準を示す。<Examples> The present invention will be described below with reference to Examples. Note that % and parts are based on weight.

太遼ｔユ けん化度９８モル％、平均重合度１　、７００のポリビ
ニルアルコール３０％、グリセリン２０％及び水５０％
からなる水溶液１００部に硫酸バリウム（比重約４．５
）２０部を加えて均一に攪拌し、１２０’Ｃ１３０分加
熱して水溶液を調製した。放冷後、型枠に入れ、−３０
℃にて３時間冷却・固化し、次いで０℃以上にて解凍し
た。この冷却・固化・解凍の一連の操作を５回繰り返し
、直径２８ｍｍのセンターを２ｏ個製造した。Tai Liao T Yu saponification degree 98 mol%, average degree of polymerization 1, 700 polyvinyl alcohol 30%, glycerin 20% and water 50%
Barium sulfate (specific gravity approximately 4.5
) was added thereto, stirred uniformly, and heated at 120'C for 130 minutes to prepare an aqueous solution. After cooling, put it in a mold and heat it to -30
The mixture was cooled and solidified at 0°C for 3 hours, and then thawed at 0°C or higher. This series of cooling, solidifying, and thawing operations was repeated five times to produce 20 centers each having a diameter of 28 mm.

このセンターに糸ゴムを巻き、外皮としてのサーリン材
（デュポン社商品名）被覆またはバラタ材被覆を施した
ゴルフボール（各々直径１．６８インチ）を各１０個衷
造した。A rubber thread was wound around this center, and 10 golf balls (each having a diameter of 1.68 inches) were made with a Surlyn material (trade name of DuPont) or a balata material covering as an outer skin.

得られたゴルフボールを、公知の液体芯材を用いた同径
のゴルフボールと比較した結果、打撃感及び直線飛行性
において遜色がなく、飛距離は勝っていた。また、故意
にナイフでゴルフボールを刃物により切断したが、含水
ゲルが噴出することはなく、単に糸ゴムが若干飛散した
にずきなかった。The obtained golf ball was compared with a golf ball of the same diameter using a known liquid core material, and it was found to be comparable in feel at impact and straight flight, and superior in flight distance. In addition, although the golf ball was intentionally cut with a knife, the hydrous gel did not spout out, and the rubber thread was simply scattered a little.

去】ｕ」１ 実施例１の硫酸バリウムの代りに亜鉛粉末（比重約７．
１）を加えた以外は実施例１と同様にしてゴルフボール
を製造した。実施例１と同様の試験を行った結果、同様
の結果が得られ、飛距煎に勝ることを知った。u''1 Instead of barium sulfate in Example 1, zinc powder (specific gravity approximately 7.
A golf ball was produced in the same manner as in Example 1 except that 1) was added. As a result of conducting the same test as in Example 1, similar results were obtained, and it was found that this method was superior to flying distance cooking.

寒凰孤ユ 実施例１のポリビニルアルコール３０％と水７０％から
なる水溶液１００部に、硫酸バリウム２０部を加える以
外は、実施例１に準じ、直径３８冊のセンターを作成し
た。これを、グリセリン水溶液中に７０時間浸漬するこ
とにより、２０％のグリセリンを含浸させた直径３０ｍ
ｍのセンターを得た。これを用いて実施例１と同様にゴ
ルフボールを製造し、試験した結果、実施例１と同様の
結果が得られた゛。A center having a diameter of 38 volumes was prepared in the same manner as in Example 1, except that 20 parts of barium sulfate was added to 100 parts of the aqueous solution of 30% polyvinyl alcohol and 70% water. By immersing this in a glycerin aqueous solution for 70 hours, it was impregnated with 20% glycerin.
I got the center of m. A golf ball was manufactured using this material in the same manner as in Example 1, and as a result of testing, the same results as in Example 1 were obtained.

特許出顕人　日本石浦株式会社 代理人弁理士　　酒　　井　　　　　−同　　　　　　
兼　　坂　　　　　　直間　　　　　　兼　　坂　　　
　　　繁特許庁長官　　宇　賀　道　部　　殿 １．事件の表示 昭和６０年　特　許　願　第２５１．９８５号２、発明
の名称 糸巻芯ゴルフボール ３、補正をする者 事件との関係　特許出願人 （４４４）　Ｅ３本石油株式会社 明細書の「発明の詳細な説明」の項 ぞれ訂正し、第１３頁第９行の「ナイフで」を削除する
。Patent author: Nihon Ishiura Co., Ltd. Representative Patent Attorney Sakai −
Kane Saka Naoma Kane Saka
Michibu Uga, Director General of the Patent Office 1. Indication of the case 1985 Patent Application No. 251.9852, Name of the invention Wound core golf ball 3, Person making the amendment Relationship to the case Patent applicant (444) ``Detailed explanation'' and delete ``with a knife'' in line 9 of page 13.

Claims (1)

【特許請求の範囲】 １）けん化度９５モル％以上、平均重合度７００以上の
ポリビニルアルコール（ＰＶＡ）及びＰＶＡと異なる水
溶性有機化合物とを含み、且つ、該ポリビニルアルコー
ルの濃度が５ｗｔ％を超え、４０ｗｔ％以下、該有機化
合物の濃度０〜３０ｗｔ％に調整された水溶液または懸
濁水溶液１００重量部に対し、比重が１より大なる充填
剤を５〜４０重量部配合した水溶液または懸濁水溶液を
、成型用鋳型へ注入後、これを−１０℃以下の温度に冷
却・固化し、次にこれを解凍する一連の凍結・解凍操作
を反復して、累積凍結回数を２〜８とすることにより得
られる高含水ゲルの球体へ、直接糸ゴムを巻いてなる糸
巻芯ゴルフボール。 ２）けん化度９５モル％以上、平均重合度７００以上の
ポリビニルアルコール（ＰＶＡ）を含み、該ポリビニル
アルコールの濃度が５ｗｔ％を超え、４０ｗｔ％以下に
調整された水溶液または懸濁水溶液１００重量部に対し
、比重が１より大なる充填剤を５〜４０重量部配合した
水溶液または懸濁水溶液を、成型用鋳型へ注入後、これ
を−１０℃以下の温度に冷却・固化し、次にこれを解凍
する一連の凍結・解凍操作を反復して、累積凍結回数を
２〜８回とすることにより得られる高含水ゲルの球体を
ＰＶＡと異なる水溶性有機化合物に接触させることによ
り、ゲル内に該有機化合物を５〜３０ｗｔ％含ませた高
含水ゲルの球体とし、これに直接糸ゴムを巻いてなる糸
巻芯ゴルフボール。[Scope of Claims] 1) Contains polyvinyl alcohol (PVA) with a saponification degree of 95 mol% or more and an average polymerization degree of 700 or more, and a water-soluble organic compound different from PVA, and the concentration of the polyvinyl alcohol exceeds 5 wt%. , 40 wt% or less, an aqueous solution or aqueous suspension containing 5 to 40 parts by weight of a filler having a specific gravity of more than 1 to 100 parts by weight of an aqueous solution or suspension of the organic compound adjusted to a concentration of 0 to 30 wt%. is injected into a mold, cooled and solidified to a temperature of -10°C or lower, and then thawed, repeating a series of freezing and thawing operations to achieve a cumulative freezing frequency of 2 to 8. A thread-wound core golf ball made by directly wrapping a rubber thread around a sphere of high water content gel obtained by the method. 2) 100 parts by weight of an aqueous solution or suspension aqueous solution containing polyvinyl alcohol (PVA) with a saponification degree of 95 mol% or more and an average polymerization degree of 700 or more, and the concentration of the polyvinyl alcohol is adjusted to be more than 5 wt% and 40 wt% or less. On the other hand, an aqueous solution or suspension containing 5 to 40 parts by weight of a filler with a specific gravity of more than 1 is injected into a mold, cooled and solidified to a temperature of -10°C or lower, and then poured into a mold. By repeating a series of freezing and thawing operations to obtain a cumulative number of freezing times of 2 to 8 times, the high water content gel spheres are brought into contact with a water-soluble organic compound different from PVA, thereby injecting water into the gel. A thread-wound core golf ball made of a highly hydrous gel sphere containing 5 to 30 wt% of an organic compound and directly wrapped with rubber thread.
JP60251985A 1985-11-12 1985-11-12 Yarn wound core golf ball Pending JPS62112575A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP60251985A JPS62112575A (en) 1985-11-12 1985-11-12 Yarn wound core golf ball
GB8627057A GB2182571B (en) 1985-11-12 1986-11-12 Golf ball cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60251985A JPS62112575A (en) 1985-11-12 1985-11-12 Yarn wound core golf ball

Publications (1)

Publication Number Publication Date
JPS62112575A true JPS62112575A (en) 1987-05-23

Family

ID=17230939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60251985A Pending JPS62112575A (en) 1985-11-12 1985-11-12 Yarn wound core golf ball

Country Status (2)

Country Link
JP (1) JPS62112575A (en)
GB (1) GB2182571B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435674A (en) * 1990-06-01 1992-02-06 Bridgestone Corp Manufacture of rubberthread-wound gold ball

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3057624B2 (en) * 1993-04-27 2000-07-04 住友ゴム工業株式会社 Thread wound golf ball
US6514157B2 (en) * 2001-03-29 2003-02-04 Acushnet Company Golf ball with non-aqueous liquid center
CN101396600B (en) * 2007-09-30 2012-11-07 江门市宝德利水溶性塑料有限公司 Water soluble biological degradation type golf balls and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0435674A (en) * 1990-06-01 1992-02-06 Bridgestone Corp Manufacture of rubberthread-wound gold ball

Also Published As

Publication number Publication date
GB2182571B (en) 1989-10-04
GB8627057D0 (en) 1986-12-10
GB2182571A (en) 1987-05-20

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