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公开(公告)号：AU3016195A
公开(公告)日：1996-02-29
申请号：AU3016195
申请日：1995-08-18
Applicant: SUMITOMO RUBBER IND
Inventor： YAMADA MIKIO , MORIYAMA KEIJI
Abstract: The present invention provides a golf ball which exhibits a soft hit feeling and a high impact resilience. The golf ball comprises a core made of an elastomer and a cover covering said core wherein said cover is made of a thermoplastic material comprising a rubber powder and a thermoplastic elastomer, said rubber powder being present in an amount of 5 to 40 parts by weight based on 100 parts by weight of said thermoplastic elastomer.
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公开(公告)号：GB2292387A
公开(公告)日：1996-02-21
申请号：GB9516996
申请日：1995-08-18
Applicant: SUMITOMO RUBBER IND
Inventor： YAMADA MIKIO , MORIYAMA KEIJI
Abstract: A golfball which exhibits a soft hit feeling and high impact resilience comprises a core made of an elastomer and a layer covering said core wherein said layer is made of a thermoplastic material comprising a rubber powder and a thermoplastic elastomer, said rubber powder being present in an amount of 5 to 40 parts by wt based on 100 parts by wt of said thermoplastc elastomer. The layer may be covered with a thermoplastic material. The elastomer may be ionomer, polyamide, polyester, polyvinyl acetate or polyethylene.
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公开(公告)号：AU664933B2
公开(公告)日：1995-12-07
申请号：AU5259293
申请日：1993-12-21
Applicant: SUMITOMO RUBBER IND
Inventor： YAMADA MIKIO , YABUKI YOSHIKAZU , ENDO SEIICHIRO
Abstract: The present invention provides a rubber composition having a high impact resilience, and improved processability and workability which may be used for the manufacture of a one-piece solid golf ball, the solid core of multi-layered solid golf balls or the solid centre of thread-wound golf balls. The rubber composition is characterized in that the rubber component is made from a mixture of: (1) 60 to 95 wt% of a polybutadiene containing at least more than 40% of cis-1,4-bonds and having a Mooney viscosity [ML1+4(100 DEG C)] of 50 to 70, obtained by using a lanthanum rare earth-based catalyst, nickel-based catalyst or cobalt-based catalyst, or a mixture thereof with another polybutadiene obtained by using a catalyst other than the above mentioned one, and (2) 5 to 40 wt% of a polyisoprene containing at least more than 90% of cis-1,4-bonds and a Mooney viscosity of 70 to 90.
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公开(公告)号：GB2287423A
公开(公告)日：1995-09-20
申请号：GB9505451
申请日：1995-03-17
Applicant: SUMITOMO RUBBER IND
Inventor： YAMADA MIKIO , YABUKI YOSHIKAZU
Abstract: In method for grinding a surface of a golf ball and removing the thin outer layer thereof, grinding tools 2 are arranged on three axes on a plane which axes radiate from a definite point at intervals of 120 DEG between one another are used, each of the grinding tools 2 possessing a circular grinding face 5 which gradually spreads toward the end and contacts a surface 1a of a golf ball 1, and the grinding tools 2 turn on the respective axes toward the same direction at the same speed keeping the same distance from the definite point O. The temperature of the ball surface is not raised excessively by this method and the resulting ball has strong paint adhesion and dimples having accurate configuration and dimensions.
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公开(公告)号：AU7902194A
公开(公告)日：1995-06-01
申请号：AU7902194
申请日：1994-11-24
Applicant: SUMITOMO RUBBER IND
Inventor： HIRAOKA HIDENORI , YAMADA MIKIO
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Patent Agency Ranking
公开(公告)号：AU7166394A
公开(公告)日：1995-03-16
申请号：AU7166394
申请日：1994-09-05
Applicant: SUMITOMO RUBBER IND
Inventor： YAMADA MIKIO , EBISUNO TADAHIRO , MORIYAMA KEIJI , SUGIMOTO KAZUSHIGE
Abstract: Disclosed is a thread wound golf ball comprising a liquid center comprising a rubber bag containing a liquid, a rubber thread layer provided on the outside of the liquid center and a cover for covering the rubber thread layer, wherein the moment of inertia of the golf ball measured at about 23 DEG C is in the range of from 75 to 80 g.cm and the rate of increase of the moment of inertia measured at about -30 DEG C to that measured at about 23 DEG C is within about 2%.
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公开(公告)号：DE69015354D1
公开(公告)日：1995-02-02
申请号：DE69015354
申请日：1990-12-31
Applicant: SUMITOMO RUBBER IND
Inventor： YAMADA MIKIO , OKA KENGO
Abstract: A golf ball with dimples 2,2A,2B disposed in a regular octahedral arrangement having a superior symmetrical property so as to arrange dimples 2,2A,2B symmetrically in each of numerously divided regions S((1)-(18)),T((1')-8')) without deteriorating the symmetrical property of the golf ball and by varying volumes of dimples 2,2A,2B adjacent to each other at a specified ratio with diameters thereof equal to each other, thereby to provide a symmetrical property and uniformity for flying a long distance.
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公开(公告)号：FR2637810B1
公开(公告)日：1993-02-12
申请号：FR8913576
申请日：1989-10-17
Applicant: SUMITOMO RUBBER IND
Inventor： YAMADA MIKIO , NAKAMURA YOSHINOBU
Abstract: The present invention provides a golf ball covering with a special ionomer resin mixture having improved properties. The special ionomer resin mixture has a melt index of 0.5 to 3.0 and a Shore D hardness of at least 65, and is prepared by mixing three ionomer resins in specific amount ratios.
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公开(公告)号：GB2228874B
公开(公告)日：1993-02-10
申请号：GB9004475
申请日：1990-02-28
Applicant: SUMITOMO RUBBER IND
Inventor： OKA KENGO , SASAKI TAKASHI , NAKAHARA AKIHIRO , YAMADA MIKIO , EBISUNO TADAHIRO
Abstract: Disclosed is a three-piece solid golf ball comprising a solid core consisting of an inner core and an outer shell surrounding said inner core, and a cover covering said solid core, characterized in that a diameter of said inner core is 29 to 36 mm, a diameter of said solid core is 37 to 41 mm, a central hardness (JIS-C) of the inner core is 25 to 70, a surface hardness (JIS-C) of said outer shell is 80 to 95, a difference between said central hardness of the inner core and said surface hardness of the outer shell is 10 or more, and the relation between the specific gravity of the inner core and the specific gravity of the outer shell satisfies 1.0
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公开(公告)号：GB2232162B
公开(公告)日：1992-07-29
申请号：GB9007634
申请日：1990-04-04
Applicant: SUMITOMO RUBBER IND
Inventor： SASAKI TAKASHI , OKA KENGO , NAKAHARA AKIHIRO , YAMADA MIKIO , EBISUNO TADAHIRO
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