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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 40. Отображено 40.
13-11-2007 дата публикации

Multi-piece solid golf ball

Номер: US0007294068B2
Автор: Hiroshi Higuchi, Naoki Miyakoshi, Akira Kimura, Toru Ogawana, HIGUCHI HIROSHI, MIYAKOSHI NAOKI, KIMURA AKIRA, OGAWANA TORU
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

A multi-piece solid golf ball has a solid core, an envelope layer that encloses the solid core, an intermediate layer that encloses the envelope layer, and a cover that encloses the intermediate layer and has a plurality of dimples on a surface thereof. The diameter of the solid core, the center hardness, surface hardness and hardness difference between the center and surface of the solid core, the thickness and surface hardness of the envelope layer, and the thickness and surface hardness of the intermediate layer are each optimized within specific ranges. Moreover, the intermediate layer is formed so as to be harder than the envelope layer and the cover. In addition, the thickness and surface hardness of the cover, and the combined thickness of the envelope layer, intermediate layer and cover are each optimized within specific ranges. This golf ball is more advantageous than prior-art golf balls because it reduces the spin rate of the ball on full shots taken with a driver and increases ...

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Номер записи: 1
18-03-2014 дата публикации

Multi-piece solid golf ball

Номер: US0008672775B2
Автор: Hiroshi Higuchi, Junji Umezawa, Toru Ogawana, Hiroyuki Nagasawa, HIGUCHI HIROSHI, UMEZAWA JUNJI, OGAWANA TORU, NAGASAWA HIROYUKI
Принадлежит: Bridgestone Sports Co., Ltd., HIGUCHI HIROSHI, UMEZAWA JUNJI, OGAWANA TORU, NAGASAWA HIROYUKI, BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

The invention provides a multi-piece solid golf ball composed of a solid core, a cover, at least one intermediate layer situated therebetween, and a plurality of dimples on a surface of the ball. The diameter of the solid core, the deflection of the core when compressed under a final load of 130 kgf from an initial load of 10 kgf, the hardness at the center of the core, the hardness in a region 5 mm to 10 mm from the center of the core, the hardness 15 mm from the center of the core, and the surface hardness are set within specific ranges. The intermediate layer is composed primarily of a material obtained by mixing under applied heat a specific resin composition and the cover is formed primarily of polyurethane. And, the number of dimples and the trajectory volume TVT are set within specific ranges. The golf ball of the invention has an excellent flight performance, feel, controllability and scuff resistance.

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Номер записи: 2
22-03-2011 дата публикации

Multi-piece solid golf ball

Номер: US0007909710B2
Автор: Hiroshi Higuchi, Junji Umezawa, Toru Ogawana, Hiroyuki Nagasawa, HIGUCHI HIROSHI, UMEZAWA JUNJI, OGAWANA TORU, NAGASAWA HIROYUKI
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

The invention provides a multi-piece solid golf ball composed of a solid core, a cover, at least one intermediate layer situated therebetween, and a plurality of dimples on a surface of the ball. The diameter of the solid core, the deflection of the core when compressed under a final load of 130 kgf from an initial load of 10 kgf, the hardness at the center of the core, the hardness in a region 5 mm to 10 mm from the center of the core, the hardness 15 mm from the center of the core, and the surface hardness are set within specific ranges. The intermediate layer is composed primarily of a material obtained by mixing under applied heat a specific resin composition, and the thickness and material hardness of the intermediate layer, as well as the hardness difference between the surface of the solid core and the intermediate layer are set within specific ranges. The cover is formed primarily of polyurethane, and has a thickness and a material hardness set within specific ranges. The golf ball of the invention has an excellent flight performance, feel, controllability and scuff resistance.

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Номер записи: 3
28-05-2019 дата публикации

Golf ball

Номер: US0010300344B2
Автор: Akira Kimura, Toru Ogawana, Katsunobu Mochizuki, KIMURA AKIRA, OGAWANA TORU, MOCHIZUKI KATSUNOBU, Kimura, Akira, Ogawana, Toru, Mochizuki, Katsunobu
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein, letting Hc be the JIS-C hardness at a center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at a surface of the core, the core has a hardness profile which satisfies the condition (Ho−H12)−(H12−Hc)≥10; letting (Ho−H12)−(H12−Hc) above be A, the spin index of the ball, defined as the dynamic coefficient of friction of the ball multiplied by A, is at least 3.0; and the hardness profile index, defined as the deflection (mm) of the core when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) multiplied by A, is at least 40.

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Номер записи: 4
30-11-2006 дата публикации

Multi-piece solid golf ball

Номер: US20060270492A1
Автор: Hiroshi Higuchi, Naoki Miyakoshi, Akira Kimura, Toru Ogawana
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

A multi-piece solid golf ball has a solid core, an envelope layer that encloses the solid core, an intermediate layer that encloses the envelope layer, and a cover that encloses the intermediate layer and has a plurality of dimples on a surface thereof. The diameter of the solid core, the center hardness, surface hardness and hardness difference between the center and surface of the solid core, the thickness and surface hardness of the envelope layer, and the thickness and surface hardness of the intermediate layer are each optimized within specific ranges. Moreover, the intermediate layer is formed so as to be harder than the envelope layer and the cover. In addition, the thickness and surface hardness of the cover, and the combined thickness of the envelope layer, intermediate layer and cover are each optimized within specific ranges. This golf ball is more advantageous than prior-art golf balls because it reduces the spin rate of the ball on full shots taken with a driver and increases ...

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Номер записи: 5
27-07-2006 дата публикации

Multi-piece solid golf ball

Номер: US20060166760A1
Автор: Hiroshi Higuchi, Akira Kimura, Toru Ogawana, Atsushi Nanba
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

A multi-piece solid golf ball composed of a solid core, at least one intermediate layer, and a cover is characterized in that the core is made of a molded and vulcanized material obtained by vulcanizing a rubber composition containing (A) a base rubber which includes (a-1) a methacryloxy- and/or acryloxy-modified silicone polymer, and containing also an unsaturated carboxylic acid and/or a metal salt thereof, an organic peroxide and an inorganic filler, and has a diameter of 30 to 40 mm and a deflection under a 980 N (100 kg) load of 2.5 to 6.0 mm; the intermediate layer is made primarily of a thermoplastic resin and has a thickness of 0.5 to 2.5 mm and a surface Shore D hardness of 45 to 75; and the cover has a thickness of 0.2 to 2.5 mm and a surface Shore D hardness of 40 to 63 which is lower than the surface Shore D hardness of the intermediate layer. The golf ball has a deflection under a 980 N (100 kg) load of 2.0 to 4.0 mm.

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Номер записи: 6
17-05-2007 дата публикации

Multi-piece solid golf ball

Номер: US20070111823A1
Автор: Hiroshi Higuchi, Naoki Miyakoshi, Akira Kimura, Toru Ogawana
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

A multi-piece solid golf ball has a solid core, an envelope layer that encloses the solid core, an intermediate layer that encloses the envelope layer, and a cover that encloses the intermediate layer and has a plurality of dimples on a surface thereof. The diameter of the solid core, the center hardness, surface hardness and hardness difference between the center and surface of the solid core, the thickness and surface hardness of the envelope layer, and the thickness and surface hardness of the intermediate layer are each optimized within specific ranges. Moreover, the intermediate layer is formed so as to be harder than the envelope layer and the cover. In addition, the thickness and surface hardness of the cover, and the combined thickness of the envelope layer, intermediate layer and cover are each optimized within specific ranges. This golf ball is more advantageous than prior-art golf balls because it reduces the spin rate of the ball on full shots taken with a driver and increases ...

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Номер записи: 7
05-02-2009 дата публикации

MULTI-PIECE SOLID GOLF BALL

Номер: US20090036231A1
Автор: Atsushi Nanba, Toru Ogawana, Hiroshi Higuchi
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The present invention provides a multi-piece solid golf ball having a core obtained by molding under heat a specific rubber composition and having a cover of at least three layers which encases the core. By optimizing the deflection of the core under a specific load, optimizing the hardness at the center of the core and the hardnesses of the innermost cover layer, outermost cover layer and intermediate cover layer, setting the combined thickness of the cover layers to at least a specific value, and forming the innermost cover layer of a highly neutralized ionomer resin composition, a sufficient reduction in the spin rate of the ball on shots taken with a driver can be achieved, enabling the distance traveled by the ball to be increased.

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Номер записи: 8
01-06-2010 дата публикации

Golf ball manufacturing method

Номер: US0007727437B2
Автор: Hiroshi Higuchi, Naoki Miyakoshi, Akira Kimura, Toru Ogawana, HIGUCHI HIROSHI, MIYAKOSHI NAOKI, KIMURA AKIRA, OGAWANA TORU
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

The invention provides a method of manufacturing golf balls composed of a core and one or more cover layer which encloses the core, at least one cover layer being a thin layer having a thickness of 1.0 mm or less. The thin layer is formed to a desired thickness on a surface of a core or spherical body by holding within a mold cavity the core or a spherical body composed of the core enclosed by a cover layer and injecting a synthetic resin material into a space defined by a surface of the core or spherical body and an inner face of the mold cavity so as to form a cover layer on the surface of the core or spherical body, then grinding the resulting cover layer to a thickness of at least 0.1 mm with a specific type of grinder. Golf balls obtained in this way can be provided with a good sphericity even when the cover is formed to a very small thickness.

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Номер записи: 9
10-02-2009 дата публикации

Multi-piece solid golf ball

Номер: US0007488262B1
Автор: Atsushi Nanba, Toru Ogawana, Hiroshi Higuchi, NANBA ATSUSHI, OGAWANA TORU, HIGUCHI HIROSHI
Принадлежит: Bridgetone Sports Co., Ltd., BRIDGETONE SPORTS CO LTD, BRIDGETONE SPORTS CO., LTD.

The present invention provides a multi-piece solid golf ball having a core obtained by molding under heat a specific rubber composition and having a cover of at least three layers which encases the core. By optimizing the deflection of the core under a specific load, optimizing the hardness at the center of the core and the hardnesses of the innermost cover layer, outermost cover layer and intermediate cover layer, setting the combined thickness of the cover layers to at least a specific value, and forming the innermost cover layer of a highly neutralized ionomer resin composition, a sufficient reduction in the spin rate of the ball on shots taken with a driver can be achieved, enabling the distance traveled by the ball to be increased.

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Номер записи: 10
07-12-2006 дата публикации

Golf ball manufacturing method

Номер: US20060273485A1
Автор: Hiroshi Higuchi, Naoki Miyakoshi, Akira Kimura, Toru Ogawana
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The invention provides a method of manufacturing golf balls composed of a core and one or more cover layer which encloses the core, at least one cover layer being a thin layer having a thickness of 1.0 mm or less. The thin layer is formed to a desired thickness on a surface of a core or spherical body by holding within a mold cavity the core or a spherical body composed of the core enclosed by a cover layer and injecting a synthetic resin material into a space defined by a surface of the core or spherical body and an inner face of the mold cavity so as to form a cover layer on the surface of the core or spherical body, then grinding the resulting cover layer to a thickness of at least 0.1 mm with a specific type of grinder. Golf balls obtained in this way can be provided with a good sphericity even when the cover is formed to a very small thickness.

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Номер записи: 11
18-03-2014 дата публикации

Multi-piece solid golf ball

Номер: US0008672776B2
Автор: Hiroshi Higuchi, Junji Umezawa, Toru Ogawana, Hiroyuki Nagasawa, Kae Iizuka, HIGUCHI HIROSHI, UMEZAWA JUNJI, OGAWANA TORU, NAGASAWA HIROYUKI, IIZUKA KAE
Принадлежит: Bridgestone Sports Co., Ltd., HIGUCHI HIROSHI, UMEZAWA JUNJI, OGAWANA TORU, NAGASAWA HIROYUKI, IIZUKA KAE, BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

The invention provides a multi-piece solid golf ball composed of a solid core, a cover, at least one intermediate layer situated therebetween, and a plurality of dimples on a surface of the ball. The diameter of the solid core, the deflection of the core when compressed under a final load of 130 kgf from an initial load of 10 kgf, the hardness at the center of the core, the hardness in a region 5 mm to 10 mm from the center of the core, the hardness 15 mm from the center of the core, and the surface hardness are set within specific ranges. The intermediate layer is composed primarily of a material obtained by mixing under applied heat a specific resin composition. The golf ball of the invention has an excellent flight performance, feel, controllability and scuff resistance.

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Номер записи: 12
22-07-2021 дата публикации

GOLF BALL

Номер: US20210220705A1
Автор: Akira KIMURA, Toru Ogawana, Katsunobu Mochizuki, Jun Shindo
Принадлежит: Bridgestone Sports Co., Ltd.

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core , a cover and an intermediate layer therebetween wherein the core is formed of a rubber composition that includes an alcohol having a value obtained by dividing the molecular weight of the alcohol by the number of hydroxyl groups thereon which is 70 or less. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas. 2. The golf ball of claim 1 , wherein the ball has a dynamic coefficient of friction which is 0.300 or more.3. The golf ball of claim 1 , wherein the JIS-C hardness Hc at the core center is from 40 to 78 and the JIS-C hardness Ho at the core surface is from 65 to 99.4. The golf ball of wherein the core hardness profile satisfies formula (4) below{'br': None, 'i': 'Ho−Hc≤', '22≤40\u2003\u2003(4).'}5. The golf ball of wherein claim 1 , letting H10 be the JIS-C hardness at a position 10 mm from the core center claim 1 , the core hardness profile satisfies formula (1)′ below{'br': None, 'i': H', 'Hc≤, '0≤10−15\u2003\u2003(1)′.'}6. The golf ball of wherein claim 1 , letting H12 be the JIS-C hardness at a position 12 mm from the core center claim 1 , the core hardness profile satisfies formula (2) below{'br': None, 'i': 'Ho−H', '15≤12≤30\u2003\u2003(2).'}7. The golf ball of wherein claim 1 , letting (Ho−H10)−(H10−Hc) in formula (3)′ be A′ claim 1 , the hardness profile index claim 1 , defined as the deflection (mm) of the core when compressed under a final load of 1 claim 1 ,275 N (130 kgf) from an initial load of 98 N (10 kgf) multiplied by A′ claim 1 , is 30 or more. This application is a continuation-in-part of ...

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Номер записи: 13
23-11-2021 дата публикации

Golf ball

Номер: US0011179605B2
Автор: Akira Kimura, Toru Ogawana, Katsunobu Mochizuki, Jun Shindo, KIMURA AKIRA, OGAWANA TORU, MOCHIZUKI KATSUNOBU, SHINDO JUN, Kimura, Akira, Ogawana, Toru, Mochizuki, Katsunobu, Shindo, Jun
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein the core is formed of a rubber composition that includes an alcohol having a value obtained by dividing the molecular weight of the alcohol by the number of hydroxyl groups thereon which is 70 or less. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas.

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Номер записи: 14
16-09-2010 дата публикации

MULTI-PIECE SOLID GOLF BALL

Номер: US20100234137A1
Автор: Hiroshi Higuchi, Junji Umezawa, Toru Ogawana, Hiroyuki Nagasawa, HIGUCHI HIROSHI, UMEZAWA JUNJI, OGAWANA TORU, NAGASAWA HIROYUKI
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The invention provides a multi-piece solid golf ball composed of a solid core, a cover, at least one intermediate layer situated therebetween, and a plurality of dimples on a surface of the ball. The diameter of the solid core, the deflection of the core when compressed under a final load of 130 kgf from an initial load of 10 kgf, the hardness at the center of the core, the hardness in a region 5 mm to 10 mm from the center of the core, the hardness 15 mm from the center of the core, and the surface hardness are set within specific ranges. The intermediate layer is composed primarily of a material obtained by mixing under applied heat a specific resin composition, and the thickness and material hardness of the intermediate layer, as well as the hardness difference between the surface of the solid core and the intermediate layer are set within specific ranges. The cover is formed primarily of polyurethane, and has a thickness and a material hardness set within specific ranges. The golf ball ...

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Номер записи: 15
05-02-2009 дата публикации

THREE-PIECE SOLID GOLF BALL

Номер: US20090036234A1
Автор: Atsushi Nanba, Toru Ogawana, Hiroshi Higuchi
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The present invention provides a three-piece solid golf ball having a core obtained by molding under heat a specific rubber composition and having a two-layer cover and an inner cover layer and an outer cover layer which encase the core and are made of a thermoplastic resin material. By optimizing the deflection of the core under a specific load, optimizing the combined thickness of the cover layers, forming the inner cover layer of a highly neutralized ionomer resin composition, and forming the outer cover layer of a special urethane material, a sufficient reduction in the spin rate of the ball on shots taken with a driver can be achieved, enabling the distance traveled by the ball to be increased. Moreover, the golf ball of the invention has a good feel on shots taken with a driver, and has an excellent spin rate on approach shots.

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Номер записи: 16
16-09-2008 дата публикации

Multi-piece solid golf ball

Номер: US0007425182B1
Автор: Atsushi Nanba, Hiroshi Higuchi, Toru Ogawana, NANBA ATSUSHI, HIGUCHI HIROSHI, OGAWANA TORU
Принадлежит: Bridgestone Sports Co., ltd., BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

The present invention provides a multi-piece solid golf ball having a core obtained by molding under heat a specific rubber composition and having a cover of at least three layers which encases the core. By optimizing the deflection of the core under a specific load, optimizing the hardness at the center of the core and the hardnesses of the innermost cover layer, outermost cover layer and intermediate cover layer, setting the combined thickness of the cover layers to at least a specific value, and forming the innermost cover layer of a highly neutralized ionomer resin composition, a sufficient reduction in the spin rate of the ball on shots taken with a driver can be achieved, enabling the distance traveled by the ball to be increased.

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Номер записи: 17
14-06-2011 дата публикации

Three-piece solid golf ball

Номер: US0007959524B2
Автор: Atsushi Nanba, Toru Ogawana, Hiroshi Higuchi, NANBA ATSUSHI, OGAWANA TORU, HIGUCHI HIROSHI
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

The present invention provides a three-piece solid golf ball having a core obtained by molding under heat a specific rubber composition and having a two-layer cover and an inner cover layer and an outer cover layer which encase the core and are made of a thermoplastic resin material. By optimizing the deflection of the core under a specific load, optimizing the combined thickness of the cover layers, forming the inner cover layer of a highly neutralized ionomer resin composition, and forming the outer cover layer of a special urethane material, a sufficient reduction in the spin rate of the ball on shots taken with a driver can be achieved, enabling the distance traveled by the ball to be increased. Moreover, the golf ball of the invention has a good feel on shots taken with a driver, and has an excellent spin rate on approach shots.

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Номер записи: 18
30-06-2020 дата публикации

Golf ball

Номер: US0010695618B2
Автор: Akira Kimura, Toru Ogawana, Katsunobu Mochizuki, Jun Shindo, KIMURA AKIRA, OGAWANA TORU, MOCHIZUKI KATSUNOBU, SHINDO JUN, Kimura, Akira, Ogawana, Toru, Mochizuki, Katsunobu, Shindo, Jun
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein the core is formed of a rubber composition that includes a lower alcohol having a molecular weight below 200. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas.

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Номер записи: 19
16-08-2016 дата публикации

Multi-piece solid golf ball

Номер: US0009415271B2
Автор: Akira Kimura, Toru Ogawana, Junji Hayashi, KIMURA AKIRA, OGAWANA TORU, HAYASHI JUNJI, Kimura Akira, Ogawana Toru, Hayashi Junji
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD

In a multi-piece solid golf ball having a core formed of a center core encased by an envelope layer, a cover having a plurality of dimples on its surface, and one or more intermediate layer disposed between the core and the cover, the center core and the envelope layer are each made of an elastic material, the radius r (mm) of the center core satisfies the condition 5≦r≦15, and the core has a cross-sectional hardness profile that satisfies specific conditions. This golf ball has an increased distance and a soft feel at impact, and also is able to prevent a decline in the durability to cracking.

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Номер записи: 20
24-05-2011 дата публикации

Three-piece solid golf ball

Номер: US0007946933B2
Автор: Atsushi Nanba, Hiroshi Higuchi, Toru Ogawana, NANBA ATSUSHI, HIGUCHI HIROSHI, OGAWANA TORU
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

The present invention provides a three-piece solid golf ball having a core molded under heat from a specific rubber composition and inner and outer cover layers encasing the core. By optimizing the core deflection under a specific load and the overall thickness of the cover layers, by forming the inner cover layer of a highly neutralized ionomer resin composition, and by optimizing within specific ranges the Shore D hardnesses of the inner cover layer and the outer cover layer, the spin rate of the ball on shots with a driver can be sufficiently reduced, enabling an increased distance to be achieved.

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Номер записи: 21
30-04-2009 дата публикации

THREE-PIECE SOLID GOLF BALL

Номер: US20090111612A1
Автор: Atsushi Nanba, Hiroshi Higuchi, Toru Ogawana
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The present invention provides a three-piece solid golf ball having a core molded under heat from a specific rubber composition and inner and outer cover layers encasing the core. By optimizing the core deflection under a specific load and the overall thickness of the cover layers, by forming the inner cover layer of a highly neutralized ionomer resin composition, and by optimizing within specific ranges the Shore D hardnesses of the inner cover layer and the outer cover layer, the spin rate of the ball on shots with a driver can be sufficiently reduced, enabling an increased distance to be achieved.

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Номер записи: 22
13-02-2018 дата публикации

Golf ball

Номер: US0009889342B2
Автор: Akira Kimura, Toru Ogawana, Katsunobu Mochizuki, KIMURA AKIRA, OGAWANA TORU, MOCHIZUKI KATSUNOBU, Kimura Akira, Ogawana Toru, Mochizuki Katsunobu
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD

In a multi-piece solid golf ball having a core, a cover and an intermediate layer therebetween, letting Hc be the JIS-C hardness at the core center, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the core surface, the core has a hardness profile which satisfies the conditions 0≦H12−Hc≦15, 15≦Ho−H12≦30, (Ho−H12)−(H12−Hc)≧10 and 20≦Ho−Hc≦40. Also, letting A be the value represented by (Ho−H12)−(H12−Hc), the spin index of the ball, defined as the dynamic coefficient of friction for the ball multiplied by A, is at least 3.0. This golf ball can satisfy at a high level the flight and control performance relied on by professional golfers and skilled amateurs.

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Номер записи: 23
10-10-2006 дата публикации

Multi-piece solid golf ball

Номер: US0007118494B2
Автор: Hiroshi Higuchi, Akira Kimura, Toru Ogawana, Atsushi Nanba, HIGUCHI HIROSHI, KIMURA AKIRA, OGAWANA TORU, NANBA ATSUSHI
Принадлежит: Bridgestone Sports Co., Ltd., BRIDGESTONE SPORTS CO LTD, BRIDGESTONE SPORTS CO., LTD.

A multi-piece solid golf ball composed of a solid core, at least one intermediate layer, and a cover is characterized in that the core is made of a molded and vulcanized material obtained by vulcanizing a rubber composition containing (A) a base rubber which includes (a-1) a methacryloxy- and/or acryloxy-modified silicone polymer, and containing also an unsaturated carboxylic acid and/or a metal salt thereof, an organic peroxide and an inorganic filler, and has a diameter of 30 to 40 mm and a deflection under a 980 N (100 kg) load of 2.5 to 6.0 mm: the intermediate layer is made primarily of a thermoplastic resin and has a thickness of 0.5 to 2.5 mm and a surface Shore D hardness of 45 to 75; and the cover has a thickness of 0.2 to 2.5 mm and a surface Shore D hardness of 40 to 63 which is lower than the surface Shore D hardness of the intermediate layer. The golf ball has a deflection under a 980 N (100 kg) load of 2.0 to 4.0 mm.

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Номер записи: 24
23-01-2018 дата публикации

Golf ball

Номер: US0009873024B2
Автор: Akira Kimura, Toru Ogawana, Ryota Nakamura, Tsuyoshi Nakajima, KIMURA AKIRA, OGAWANA TORU, NAKAMURA RYOTA, NAKAJIMA TSUYOSHI, Kimura Akira, Ogawana Toru, Nakamura Ryota, Nakajima Tsuyoshi
Принадлежит: BRIDGESTONE SPORTS CO., LTD., BRIDGESTONE SPORTS CO LTD

The invention provides a golf ball having a core and a cover of at least one layer. The core has a cross-sectional hardness which, letting R (mm) be the radius of the core, A be the JIS-C hardness at a center of the core, B be the JIS-C hardness at a position R/3 mm from the core center, C be the JIS-C hardness at a position R/1.8 mm from the core center, D be the JIS-C hardness at a position R/1.3 mm from the core center, and E be the JIS-C hardness at a surface of the core, satisfies the formulas (1) D−C≧7, (2) C−B≦7, (3) (D−C)−(C−B)≧7, and (4) E−A≧16.

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Номер записи: 25
07-11-2013 дата публикации

GOLF BALL

Номер: US20130296073A1
Автор: Kimura Akira, Nakamura Ryota, OGAWANA Toru
Принадлежит: BRIDGESTONE SPORTS CO., LTD

The invention provides a golf ball having a core and a cover of at least one layer. The core has a cross-sectional hardness which, letting D (mm) be the radius of the core, O be the JIS-C hardness at a center of the core, P be the JIS-C hardness at a position 25% of D from the core center, Q be the JIS-C hardness at a position 55% of D mm from the core center, and T be the JIS-C hardness at a position 85% of D from the core center, satisfies the formulas (1) P−O≦4, (2) Q−O≦5, and (3) T−Q≧10. 1. A golf ball comprising a core and a cover of at least one layer , wherein the core has a cross-sectional hardness which , letting D (mm) be a radius of the core , O be a JIS-C hardness at a center of the core , P be a JIS-C hardness at a position 25% of D from the core center , Q be a JIS-C hardness at a position 55% of D mm from the core center , and T be a JIS-C hardness at a position 85% of D from the core center , satisfies the formulas (1) , (2) and (3) below:{'br': None, 'i': 'P−O≦', '4\u2003\u2003(1)'}{'br': None, 'i': 'Q−O≦', '5\u2003\u2003(2)'}{'br': None, 'i': 'T−Q≧', '10.\u2003\u2003(3)'}2. The golf ball of claim 1 , wherein the ball has a deflection claim 1 , when compressed under a final load of 5 claim 1 ,880 N (600 kgf) from an initial load state of 98 N (10 kgf) claim 1 , of from 7 to 10 mm.3. The golf ball of claim 1 , wherein the core is formed of a rubber composition which includes an organic peroxide having a one-minute half-life temperature of from about 165° C. to about 185° C. and sulfur.4. The golf ball of claim 1 , wherein the core has a diameter of from 32 to 41 mm.5. The golf ball of claim 1 , wherein the core is composed of a single layer.6. The golf ball of claim 1 , wherein (T−Q)÷(Q−O)≧1. The present invention relates to a golf ball having a core and a cover composed of at least one layer. More specifically, the invention relates to a golf ball which achieves satisfactory distances on shots with both drivers and middle irons used by professional ...

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Номер записи: 26
07-11-2013 дата публикации

GOLF BALL

Номер: US20130296075A1
Автор: Kimura Akira, Nakamura Ryota, OGAWANA Toru
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The invention provides a golf ball having a core and a cover of at least one layer. The cover includes an outermost layer and at least one intermediate layer interposed between the outermost layer and the core. The core has a cross-sectional hardness which, letting R (mm) be the radius of the core, A be the JIS-C hardness at the center of the core, B be the JIS-C hardness at a position R/3 mm from the core center, C be the JIS-C hardness at a position R/1.8 mm from the core center, D be the JIS-C hardness at a position R/1.5 mm from the core center, and E be the JIS-C hardness at the surface of the core, satisfies formulas (1) B−A Подробнее

Номер записи: 27
07-11-2013 дата публикации

Golf ball

Номер: US20130296076A1
Автор: Akira Kimura, Ryota Nakamura, Toru Ogawana
Принадлежит: Bridgestone Sports Co Ltd

The invention provides a golf ball having a core and a cover of at least one layer. The core has a cross-sectional hardness which, letting R (mm) be the radius of the core, A be the JIS-C hardness at a center of the core, B be the JIS-C hardness at a position R/3 mm from the core center, C be the JIS-C hardness at a position R/1.8 mm from the core center, D be the JIS-C hardness at a position R/1.5 mm from the core center, and E be the JIS-C hardness at a surface of the core, satisfies the formulas (1) B−A<D−B, (2) C−A≦8, and (3) E−B≧15.

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Номер записи: 28
07-11-2013 дата публикации

GOLF BALL

Номер: US20130296077A1
Автор: Kimura Akira, Nakamura Ryota, OGAWANA Toru
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The invention provides a golf ball having a core and a cover of at least one layer. The cover includes an outermost layer and at least one intermediate layer interposed between the outermost layer and the core. The core has a cross-sectional hardness which, letting R (mm) be the radius of the core, A be the JIS-C hardness at the center of the core, B be the JIS-C hardness at a position R/3 mm from the core center, C be the JIS-C hardness at a position R/1.8 mm from the core center, D be the JIS-C hardness at a position R/1.5 mm from the core center, and E be the JIS-C hardness at the surface of the core, satisfies formulas (1) B−A Подробнее

Номер записи: 29
10-04-2014 дата публикации

GOLF BALL

Номер: US20140100059A1
Автор: Kimura Akira, NAKAJIMA Tsuyoshi, Nakamura Ryota, OGAWANA Toru
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

The invention provides a golf ball having a core and ah cover of at least one layer. The core has a cross-sectional hardness which, letting R (mm) be the radius of the core, A be the JIS-C hardness at a center of the core, B be the JIS-C hardness at a position R/3 mm from the core center, C be the JIS-C hardness at a position R/1.8 mm from the core center, D be the JIS-C hardness at a position R/1.3 mm from the core center, and E be the JIS-C hardness at a surface of the core, satisfies the formulas (1) D−C≧7, (2) C−B≦7, (3) (D−C)−(C−B)≧7, and (4) E−A≧16. 1. A golf ball comprising a core and a cover of at least one layer , wherein the core has a cross-sectional hardness which , letting R (mm) be a radius of the core , A be a JIS-C hardness at a center of the core , B be a JIS-C hardness at a position R/3 mm from the core center , C be a JIS-C hardness at a position R/1.8 mm from the core center , D be a JIS-C hardness at a position R/1.3 mm from the core center , and E be a JIS-C hardness at a surface of the core , satisfies formulas (1) to (4) below:{'br': None, 'i': 'D−C≧', '7\u2003\u2003(1)'}{'br': None, 'i': 'C−B≦', '7\u2003\u2003(2)'}{'br': None, 'i': D−C', 'C−B, '()−()≧7\u2003\u2003(3)'}{'br': None, 'i': 'E−A≧', '16\u2003\u2003(4)'}2. The golf ball of claim 1 , wherein the ball has a deflection claim 1 , when compressed under a final load of 5 claim 1 ,880 N (600 kgf) from an initial load state of 98 N (10 kgf) claim 1 , of from 7 to 10 mm.3. The golf ball of claim 1 , wherein the cover comprises an outermost layer and an intermediate layer interposed between the outermost layer and the core claim 1 , and the ball has claim 1 , at a surface of a sphere composed of the core covered by the intermediate layer claim 1 , a JIS-C hardness of at least 90.4. The golf ball of claim 1 , wherein the outermost layer of the cover contains a base resin comprising a polyurethane material having a Shore D hardness of from 40 to 60.5. The golf ball of claim 1 , wherein the ...

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Номер записи: 30
03-07-2014 дата публикации

MULTI-PIECE SOLID GOLF BALL

Номер: US20140187351A1
Автор: Kimura Akira, Nakamura Ryota, OGAWANA Toru
Принадлежит: BRIDGESTONE SPORTS CO., LTD

A multi-piece solid golf ball has a core, at least one intermediate layer and an outer layer. The core is formed of a single layer or of two or more layers. The interior hardness profile of the core is set in a specific range, and the relationship between the compressive deformations of the core and the golf ball under given loadings is set in a specific range. The outer layer is formed primarily of a thermoplastic polyurethane material, and has a material hardness that is set in a specific range. 1. A multi-piece solid golf ball comprising a core , at least one intermediate layer and an outer layer , wherein the core is formed of a single layer or of two or more layers;letting Ho be a JIS-C hardness at a center of the core and Hu be a JIS-C hardness at a surface of the core, the JIS-C hardness Ho is from 30 to 65, the JIS-C hardness Hu is from 65 to 90 and Hu−Ho is at least 20; letting D (mm) be a radius of the core, the core has a hardness profile in which the hardness does not decrease toward the core surface from a position 55% of D from the core center; letting (A) be the compressive deformation (mm) of the core when compressed under a final load of 450 kgf from an initial load state of 10 kgf and (B) be the compressive deformation (mm) of the golf ball when compressed under a final load of 600 kgf from an initial load state of 10 kgf, the value (A)-(B) is in the range of from −0.4 to 2.5; the outer layer is formed primary of a thermoplastic polyurethane material; and the outer layer has a Shore D material hardness of more than 50 and not more than 60.2. The multi-piece solid golf ball of wherein claim 1 , letting (A) be the compressive deformation (mm) of the core when compressed under a final load of 450 kgf from an initial load state of 10 kgf claim 1 , and (C) be the compressive deformation (mm) of the golf ball when compressed under a final load of 450 kgf from an initial load state of 10 kgf claim 1 , the value (A)-(C) is in the range of from 0 to 5.5.3. ...

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Номер записи: 31
03-07-2014 дата публикации

MULTI-PIECE SOLID GOLF BALL

Номер: US20140187353A1
Автор: Kimura Akira, Nakamura Ryota, OGAWANA Toru
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

A multi-piece solid golf ball has a core, at least one intermediate layer and an outer layer. The core is formed of a single layer or of two or more layers. The interior hardness profile of the core is set in a specific range, and the relationship between the compressive deformations of the core and the golf ball under given loadings is set in a specific range. The outer layer is formed primarily of a thermoplastic polyurethane material, and has a material hardness that is set in a specific range. 1. A multi-piece solid golf ball comprising a core , at least one intermediate layer and an outer layer , wherein the core is formed of a single layer or of two or more layers; letting Ho be a JIS-C hardness at a center of the core and Hu be a JIS-C hardness at a surface of the core , the JIS-C hardness Ho is from 40 to 70 , the JIS-C hardness Hu is from 75 to 95 and Hu−Ho is at least 20; letting D (mm) be a radius of the core , the core has a hardness profile in which the hardness does not decrease toward the core surface from a position 55% of D from the core center; letting (A) be the compressive deformation (mm) of the core when compressed under a final load of 450 kgf from an initial load state of 10 kgf and (B) be the compressive deformation (mm) of the golf ball when compressed under a final load of 600 kgf from an initial load state of 10 kgf , the value (A)−(B) is in the range of from −0.4 to 2.5; the outer layer is formed primary of a thermoplastic polyurethane material; and the outer layer has a Shore D material hardness of at least 40 and not more than 50.2. The multi-piece solid golf ball of wherein claim 1 , letting (A) be the compressive deformation (mm) of the core when compressed under a final load of 450 kgf from an initial load state of 10 kgf claim 1 , and (C) be the compressive deformation (mm) of the golf ball when compressed under a final load of 450 kgf from an initial load state of 10 kgf claim 1 , the value (A)−(C) is in the range of from 1 to 4.8 ...

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Номер записи: 32
20-04-2017 дата публикации

GOLF BALL

Номер: US20170106245A1
Автор: Kimura Akira, Mochizuki Katsunobu, OGAWANA Toru
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

In a multi-piece solid golf ball having a core, a cover and an intermediate layer therebetween, letting Hc be the JIS-C hardness at the core center, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the core surface, the core has a hardness profile which satisfies the conditions 0≦H12−Hc≦15, 15≦Ho−H12≦30, (Ho−H12)−(H12−Hc)≧10 and 20≦Ho−Hc≦40. Also, letting A be the value represented by (Ho−H12)−(H12−Hc), the spin index of the ball, defined as the dynamic coefficient of friction for the ball multiplied by A, is at least 3.0. This golf ball can satisfy at a high level the flight and control performance relied on by professional golfers and skilled amateurs. 2. The golf ball of wherein claim 1 , letting (Ho−H12)−(H12−Hc) in condition (3) be A claim 1 , the hardness distribution index of the core claim 1 , defined as the deflection (mm) of the core when compressed under a final load of 1 claim 1 ,275 N (130 kgf) from an initial load of 98 N (10 kgf) multiplied by A claim 1 , is at least 40.3. The golf ball of claim 1 , wherein the surface of the cover is treated with a polyisocyanate compound that is free of organic solvent.4. The golf ball of claim 3 , wherein the polyisocyanate compound is one claim 3 , or a mixture of two or more claim 3 , selected from the group consisting of tolylene-2 claim 3 ,6-diisocyanate claim 3 , tolylene-2 claim 3 ,4-diisocyanate claim 3 , 4 claim 3 ,4′-diphenylmethane diisocyanate claim 3 , polymethylene polyphenyl polyisocyanate claim 3 , 1 claim 3 ,5-diisocyanatonaphthalene claim 3 , isophorone diisocyanate (including isomer mixtures) claim 3 , dicyclohexylmethane-4 claim 3 ,4′-diisocyanate claim 3 , hexamethylene-1 claim 3 ,6-diisocyanate claim 3 , m-xylylene diisocyanate claim 3 , hydrogenated xylylene diisocyanate claim 3 , tolidine diisocyanate claim 3 , norbornene diisocyanate claim 3 , derivatives thereof claim 3 , and prepolymers formed of said polyisocyanate compounds.5. The golf ...

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Номер записи: 33
17-05-2018 дата публикации

Golf ball

Номер: US20180133560A1
Автор: Akira Kimura, Katsunobu Mochizuki, Toru Ogawana
Принадлежит: Bridgestone Sports Co Ltd

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1 , a cover 3 and an intermediate layer 2 therebetween wherein, letting Hc be the JIS-C hardness at a center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at a surface of the core, the core has a hardness profile which satisfies the condition (Ho−H12)−(H12−Hc)≥10; letting (Ho−H12)−(H12−Hc) above be A, the spin index of the ball, defined as the dynamic coefficient of friction of the ball multiplied by A, is at least 3.0; and the hardness profile index, defined as the deflection (mm) of the core when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf) multiplied by A, is at least 40.

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Номер записи: 34
26-09-2019 дата публикации

Golf ball

Номер: US20190290971A1
Автор: Akira Kimura, Jun Shindo, Katsunobu Mochizuki, Toru Ogawana
Принадлежит: Bridgestone Sports Co Ltd

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1 , a cover 3 and an intermediate layer 2 therebetween wherein the core is formed of a rubber composition that includes a lower alcohol having a molecular weight below 200. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas.

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Номер записи: 35
01-10-2020 дата публикации

GOLF BALL

Номер: US20200306594A1
Автор: Kimura Akira, Mochizuki Katsunobu, OGAWANA Toru, SHINDO Jun
Принадлежит: BRIDGESTONE SPORTS CO., LTD.

In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core a cover and an intermediate layer therebetween wherein the core is formed of a rubber composition that includes an alcohol having a value obtained by dividing the molecular weight of the alcohol by the number of hydroxyl groups thereon which is 70 or less. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 nun from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas. 1. A multi-piece solid golf ball comprising a core , a cover , and an intermediate layer situated therebetween and having a paint film layer formed on a surface of the cover , wherein the core is formed of a rubber composition containing the following ingredients (a) to (d):(a) a base rubber,(b) a co-crosslinking agent which is an α,β-unsaturated carboxylic acid or a metal salt thereof or both,(c) a crosslinking initiator, and [{'br': None, '(Ho-H12)-(H12-Hc)≥0 \u2003\u2003(3)'}, {'br': None, '22≤Ho-Hc≤40 \u2003\u2003(4)'}], '(d) an alcohol having a value obtained by dividing the molecular weight of the alcohol by the number of hydroxyl groups thereon which is 70 or less; and, letting Hc be the JIS-C hardness at a center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at a surface of the core, the core has a hardness profile which satisfies formulas (3) and (4) below'}2. The golf ball of claim 1 , wherein the ball has a dynamic coefficient of friction which is 0.300 or more.3. The golf ball of claim 1 , wherein the JIS-C hardness at the core center is from 40 to 78 and the JIS-C hardness Ho at the core surface is from 65 to 99.4. The golf ball of ...

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Номер записи: 36
24-12-2015 дата публикации

Multi-piece solid golf ball

Номер: US20150367178A1
Автор: Akira Kimura, Junji Hayashi, Toru Ogawana
Принадлежит: Bridgestone Sports Co Ltd

In a multi-piece solid golf ball having a core formed of a center core encased by an envelope layer, a cover having a plurality of dimples on its surface, and one or more intermediate layer disposed between the core and the cover, the center core and the envelope layer are each made of an elastic material, the radius r (mm) of the center core satisfies the condition 5≦r≦15, and the core has a cross-sectional hardness profile that satisfies specific conditions. This golf ball has an increased distance and a soft feel at impact, and also is able to prevent a decline in the durability to cracking.

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Номер записи: 37
01-07-2014 дата публикации

Multi-piece solid golf ball

Номер: US8764582B2
Автор: Akira Kimura, Hiroshi Higuchi, Naoki Miyakoshi, Toru Ogawana
Принадлежит: Bridgestone Sports Co Ltd

A multi-piece solid golf ball has a solid core, an envelope layer that encloses the solid core, an intermediate layer that encloses the envelope layer, and a cover that encloses the intermediate layer and has a plurality of dimples on a surface thereof. The diameter of the solid core, the center hardness, surface hardness and hardness difference between the center and surface of the solid core, the thickness and surface hardness of the envelope layer, and the thickness and surface hardness of the intermediate layer are each optimized within specific ranges. Moreover, the intermediate layer is formed so as to be harder than the envelope layer and the cover. In addition, the thickness and surface hardness of the cover, and the combined thickness of the envelope layer, intermediate layer and cover are each optimized within specific ranges.

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Номер записи: 38
27-04-2017 дата публикации

ゴルフボール

Номер: JP2017077355A
Автор: Akira Kimura, Takenobu Mochizuki, Toru Ogawana, 徹 小川名, 明 木村
Принадлежит: Bridgestone Sports Co Ltd

【解決手段】本発明は、コア１とカバー３との間に中間層２を介在させたマルチピースソリッドゴルフボールＧであって、上記コア１の硬度分布において、コア中心のＪＩＳ−Ｃ硬度をＨｃ、コア中心から１２ｍｍ離れた位置のＪＩＳ−Ｃ硬度をＨ12、コア表面のＪＩＳ−Ｃ硬度をＨｏとするとき、０≦Ｈ12−Ｈｃ≦１５、１５≦Ｈｏ−Ｈ12≦３０、（Ｈｏ−Ｈ12）-（Ｈ12−Ｈｃ）≧１０、及び２０≦Ｈｏ−Ｈｃ≦４０の４式を全て満足し、且つ、上記（Ｈｏ−Ｈ12）−（Ｈ12−Ｈｃ）をＡ、動摩擦係数×Ａをスピン指数とするとき、該スピン指数が３．０以上となることを特徴とするゴルフボールを提供する。 【効果】本発明のゴルフボールによれば、プロや上級者が使用する飛びとコントロール性能を高いレベルで満足し得るものである。 【選択図】図１

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Номер записи: 39
19-02-2009 дата публикации

マルチピースソリッドゴルフボール

Номер: JP2009034507A
Автор: Hiroshi Higuchi, Masashi Minamiuma, Toru Ogawana, 博士 樋口, 徹 小川名, 昌司 南馬
Принадлежит: Bridgestone Sports Co Ltd

【解決手段】本発明は、特定のゴム組成物を加熱成型してなるコア（１）と、熱可塑性樹脂材料からなり、コアを被覆する３層以上のカバー層（２）（３）（４）からなるマルチピースソリッドゴルフボール（Ｇ）であり、コアの特定荷重における変形量や、コアの中心，最内カバー層，最外カバー層及中間カバー層の硬度の適正化を図り、カバー層の総厚みを特定以上とし、さらに、最内カバー層を高中和アイオノマー樹脂組成物にて形成したマルチピースソリッドゴルフボールを提供する。 【効果】本発明のゴルフボールは、ドライバー打撃時のスピン量の低減化を十分に図ることができ、飛距離を増大させたものであり、ドライバー打撃時の打感が良い。 【選択図】図１

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Номер записи: 40