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公开(公告)号：GB2235693B
公开(公告)日：1992-06-17
申请号：GB9019634
申请日：1990-09-07
Applicant: BRIDGESTONE CORP
Inventor： EGASHIRA YOSHINORI , TAKAHASHI KAZUYUKI , TOMITA SEISUKE
Abstract: One-piece and multi-layered golf balls are improved in flying performance by forming the one-piece ball entirely or multi-layered golf ball core from a rubber composition comprising a base rubber and a co-crosslinking agent in the form of a premix of an unsaturated fatty acid metal salt and a liquid polymer.
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公开(公告)号：DE4028527A1
公开(公告)日：1991-03-21
申请号：DE4028527
申请日：1990-09-07
Applicant: BRIDGESTONE CORP
Inventor： EGASHIRA YOSHINORI , TAKAHASHI KAZUYUKI , TOMITA SEISUKE
Abstract: One-piece and multi-layered golf balls are improved in flying performance by forming the one-piece ball entirely or multi-layered golf ball core from a rubber composition comprising a base rubber and a co-crosslinking agent in the form of a premix of an unsaturated fatty acid metal salt and a liquid polymer.
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公开(公告)号：GB2164260B
公开(公告)日：1988-10-05
申请号：GB8522363
申请日：1985-09-10
Applicant: BRIDGESTONE CORP
Inventor： TOMITA SEISUKE , EGASHIRA YOSHINORI
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公开(公告)号：GB2232417A
公开(公告)日：1990-12-12
申请号：GB9011582
申请日：1990-05-23
Applicant: BRIDGESTONE CORP
Inventor： WATANABE YOICHI , EGASHIRA YOSHINORI , TAKHASHI KAZUYUKI , TOMITA SEISUKE
Abstract: A thread-wound golf ball comprises a thread-wound core (3) and a cover (4), the cover (4) being formed of a vulcanized rubber composition comprising a base rubber comprising at least 30% by weight of transpolyisoprene, and having a vulcanizing sulfur content ratio between radially outer and inner regions thereof of from 1:2 to 4:1. Sufficient vulcanizing sulfur is available throughout the cover (4) to render the cover resistant to cut and shear so that the ball is durable.
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公开(公告)号：JPH06277312A
公开(公告)日：1994-10-04
申请号：JP18160892
申请日：1992-06-17
Applicant: BRIDGESTONE CORP
Inventor： EGASHIRA YOSHINORI , YAMAGISHI HISASHI , WATANABE HIDEO , TAKAHASHI KAZUYUKI , SHINDO JUN
Abstract: PURPOSE:To increase flight distance by blending titanium white and barium sulfate with a cover material mainly composed of an ionomer resin for a cover to obtain a specified specific gravity. CONSTITUTION:In a golf ball wherein a core is covered, a cover material composed mainly of an ionomer resin and adjusted in specific gravity by using titanium white (specific gravity 4.3) and barium sulfate (specific gravity 4.47) as an inorganic white filler is used. A blending ratio of the titanium white to the barium sulfate is desirable 20%, or more of titanium white to total volume of both the fillers in view of retaining a degree of white color A filling quantity of the titanium white and barium sulfate filler into the cover is 7-25 parts by weight within the specific gravity range of 1.01-1.15 as a cover material in combination of both to the ionomer resin 100 parts by weight. When the specific graity is 1.01 or less, effect of increasing moment of inertia is little and therefore improvement effect in flight distance of golf ball is little. When it is 1.15 or more, hitting resistance, cutting resistance and durability required for the cover material are lowered and impact resilience is reduced.
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Patent Agency Ranking
公开(公告)号：JPH04314465A
公开(公告)日：1992-11-05
申请号：JP2466592
申请日：1992-01-14
Applicant: BRIDGESTONE CORP
Inventor： HASHIMOTO TAKATSUGU , EGASHIRA YOSHINORI , KINOSHITA TAKESHI
Abstract: PURPOSE:To provide a hard golf ball having a high physical property by uniformly mixing metallic salt of alpha,beta-ethylenically unsaturated carboxilic acid through solution master batch into rubber-like polymer. CONSTITUTION:Polymer cement is producedin proper aliphatic hydrocarbon solvent. Suspension is formed in the hydrocarbon solvent miscible with hydrocarbon solvent of metallic salt of alpha,beta-ethylenically unsaturated carboxilic acid. The polymer cement is mixed with the suspension to remove the solvent and provide the metallic salt uniformly dispersed in the polymer. Then, a hard golf ball is produced from these materials.
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公开(公告)号：JPH04314464A
公开(公告)日：1992-11-05
申请号：JP2466292
申请日：1992-01-14
Applicant: BRIDGESTONE CORP
Inventor： HASHIMOTO TAKATSUGU , EGASHIRA YOSHINORI , KINOSHITA TAKESHI
Abstract: PURPOSE:To improve workability and shorten a setting time by composing a hard golf ball of vulcanizable rubber and a reinforcing filler comprising substantially metallic sald anhydride of alpha,beta-ethylenically unsaturated carboxyilic acid. CONSTITUTION:Vulcanizable rubber selected from the group consisting of natural rubber, synthetic rubber and mixture of these rubber and a reinforcing filler substantially containing metallic salt anhydride of about 5-10 pts.wt. of alpha,beta-ethylenically unsaturated carboxilic acid per 100 pts.wt. of vulcanizable rubber are used to form a hard of ball.
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公开(公告)号：JPH04109971A
公开(公告)日：1992-04-10
申请号：JP23097090
申请日：1990-08-31
Applicant: BRIDGESTONE CORP
Inventor： EGASHIRA YOSHINORI , TAKAHASHI KAZUYUKI , TOMITA SEISUKE
Abstract: PURPOSE:To improve both flying performance of a golf ball and the feeling of a player when the player hits the ball by setting the hardness of the surface of the core and that of the 4-mm inside portion of the surface of the core at more than a predetermined value, and making the hardness of the 2-mm inside portion of the surface of the core smaller than those of the surface of the core and the 4-mm inside portion by more than a specific value. CONSTITUTION:When the hardness of a core is measured by a JIS-C type hardness meter, the hardness of a portion inside of the surface of the core by 2mm is softer by 2 deg. than those of the surface of the core and a portion inside of the surface of the core by 4mm, and also the hardness of the surface of the core and that of the portion inside of the surface of the core by 4mm are both more than 78 deg.. When the hardness is lower than 78 deg., the durability of the ball is deteriorated, so the hardness of a cover provided over the surface of the core is preferably more than 90 deg..
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公开(公告)号：JPS63247067A
公开(公告)日：1988-10-13
申请号：JP8098987
申请日：1987-04-03
Applicant: BRIDGESTONE CORP
Inventor： SUZUKI SHOSUKE , YAMAGUCHI MICHIYUKI , YOKOBORI TAKEO , EGASHIRA YOSHINORI , ISHIWAKA TAKUMI , ANDO YUKIO
Abstract: PURPOSE:To reduce noise generated by rolls, a printing hammers and printing wire due to an impact at the time of printing by employing platen rolls consisting of a specific rubber elastic body fixed concentrically to a core material made up of a metal shaft, plastic shaft or metal shaft covered with a plastic. CONSTITUTION:A rubber elastic body fixed concentrically to a core material of a platen roll contains at least either one of (a) styrene/butadiene copolymerized rubber, (b) nitrile/butadiene copolymerized rubber, (c) butyl rubber and (d) halogenated butyl rubber; and at least one for improving dependence of modulus of elasticity on temperature selected from (1) polystyrene resin, (m) phenol resin, (n) polypropylene resin (o) a reinforced rubber composition wherein short fibers of a thermoplastic polymer having a-(CO-NH)-group in its molecule are graft-polymerized through a precondensate of phenol/ formaldehyde resin onto a vulcanizable rubber and (p) a copolymer comprising a conjugated diolefin, ethylenically unsaturated carboxylic acid and a vinyl monomer copolymerizable with them.
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公开(公告)号：JPS62233515A
公开(公告)日：1987-10-13
申请号：JP7631386
申请日：1986-04-02
Applicant: BRIDGESTONE CORP
Inventor： EGASHIRA YOSHINORI , TOMITA SEISUKE , SUZUKI SHOSUKE
IPC: F16C13/00
Abstract: PURPOSE:To increase the hardness of a roll and to reduce the impact noise of printing by forming a rubber cylinder composed of a rubber composition containing a reinforced rubber composition mixed with a thermoplastic polymer integrally over a metallic core. CONSTITUTION:A rubber cylinder to be formed integrally over a metallic or resin core is composed of a reinforced rubber composition composed of natural rubber or polyisoprene rubber and vulcanizable rubber mixed with short fibers of thermoplastic polymer. Short micro fibers of nylon 6, polyurethane, etc. are suitable as said short fibers of thermoplastic polymer and burried in a vulcanizable rubber in the form of short fibers with molecules being arranged in the axial direction of fibers. The thermoplastic short fibers are mixed by 2-30wt% for 100wt% of the entire rubber component of rubber composition.
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