Patent application number | Description | Published |
20110045923 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a specific, highly neutralized, ionomeric resin composition, has a diameter of from 10 to 38 mm, and has a cross-sectional hardness difference of within ±5 between any two points on a cross-section formed by cutting the inner core layer in half. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 30 to 42 mm. The sum of the hardnesses at the center of the inner core layer and at the surface of the outer core layer is set to a value in a range of from 130 to 170. Such a golf ball is able to achieve an increased distance. | 02-24-2011 |
20110172028 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section obtained by cutting the inner core layer in half, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. Such a golf ball is able to achieve an increased distance. | 07-14-2011 |
20110172029 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of two or more layers, which solid core has an inner core layer and an outer core layer, and cover has an inner cover layer and an outer cover layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section obtained by cutting the inner core layer in half, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. And, the inner cover layer has the specific thickness and Shore D hardness and the outer cover layer has the specific Shore D hardness, which is lower than that of the inner cover layer. Such a golf ball is able to achieve an increased distance. | 07-14-2011 |
20110172030 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section obtained by cutting the inner core layer in half, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. Such a golf ball is able to achieve an increased distance. | 07-14-2011 |
20110172031 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of two or more layers, which solid core has an inner core layer and an outer core layer, and cover has an inner cover layer and an outer cover layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section obtained by cutting the inner core layer in half, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. And, the difference in Shore D hardness between the inner cover layer and the outer cover layer is within ±5. Such a golf ball is able to achieve an increased distance. | 07-14-2011 |
20110172032 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of two or more layers, which solid core has an inner core layer and an outer core layer, and cover has an inner cover layer and an outer cover layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section obtained by cutting the inner core layer in half, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. And, the inner cover layer has the specific thickness and Shore D hardness, and the outer cover layer has the specific thickness and Shore D hardness, which is higher than that of the inner cover layer. Such a golf ball is able to achieve an increased distance. | 07-14-2011 |
20120277020 | PRACTICE GOLF BALL - A practice golf ball has a core and a cover. The core is made of a rubber composition which includes a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The base rubber is a mixture of polybutadiene with styrene-butadiene rubber and/or isoprene rubber, and the co-crosslinking agent is methacrylic acid. The core has a specific deflection under a specific load, and the ball has a specific initial velocity. The dimples on the surface of the ball have a volume ratio VR of from 0.95 to 1.7. | 11-01-2012 |
20120277021 | PRACTICE GOLF BALL - A practice golf ball has a core made of a rubber composition which includes a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide, and has a cover which encases the core and is made of a resin material. The co-crosslinking agent is methacrylic acid. The resin material has a breaking strength of 20 to 80 MPa and an elongation of 150 to 600%. The ball is endowed with the properties required of practice balls intended for long-term use, including better durability to cracking and durability of appearance than ordinary game balls, and also better durability to ball surface loss than the one-piece golf balls which are commonly used as practice balls. | 11-01-2012 |
20120277022 | PRACTICE GOLF BALL - A practice golf ball has a core and a cover. The core is made of a rubber composition which includes a base rubber, a co-crosslinking agent which is methacrylic acid, a crosslinking initiator and a metal oxide. The respective ingredients in the rubber composition are formulated in specific amounts, and the core has an optimized hardness profile. The cover is made of a resin component which is composed primarily of polyurethane. The cover has a thickness of 0.3 mm to 1.9 mm, and a material hardness, expressed as the Shore D hardness, of 30 to 57. The respective deflections of the core and the ball under a specific load, and the relationship therebetween, are optimized. | 11-01-2012 |
20120277023 | PRACTICE GOLF BALL - In a practice golf ball having a core and a cover encasing the core, the cover has a material hardness, expressed as the Shore D hardness, of from 30 to 57. The core has an initial velocity CV (m/s) and the ball has an initial velocity BV | 11-01-2012 |
20120277024 | PRACTICE GOLF BALL - A practice golf ball has a core and a cover. The core is made of a rubber composition which includes a base rubber, a co-crosslinking agent which is methacrylic acid, a crosslinking initiator and a metal oxide. The respective ingredients in the rubber composition are formulated in specific amounts, and the core has an optimized hardness profile. The cover includes a resin component which is composed primarily of polyurethane. The cover has a thickness of 0.3 mm to 1.9 mm, and a material hardness, expressed as the Shore D hardness, of 30 to 48. The respective deflections of the core and the ball under a specific load, and the relationship therebetween, are optimized. The volume ratio VR of dimples on the surface of the ball is optimized. | 11-01-2012 |
20120277025 | PRACTICE GOLF BALL - A practice golf ball with a core and a cover has, upon initial measurement, a deflection BH1 (mm) when compressed under a final load of 1,275 N from an initial load of 98 N and an initial velocity BV1 (m/s), and also has, when measured again after being left to stand for 350 days following initial measurement, a deflection BH2 (mm) when compressed under a final load of 1,275 N from an initial load of 98 N and an initial velocity BV2 (m/s), such that the difference BH2−BH1 is not more than 0.2 mm and the difference BV2−BV1 is not more than 0.3 m/s. The ball has excellent durability to cracking and durability of appearance, and also maintains a stable feel and flight performance over a long period of time. | 11-01-2012 |
20130095955 | SOLID GOLF BALL - The invention provides a solid golf ball having a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The base rubber is a mixture of polybutadiene and a styrene-butadiene rubber, the styrene-butadiene rubber having a styrene bond content of not more than 35 wt %. The co-crosslinking agent is methacrylic acid. The core deflection under specific loading and the VR value for dimples on the ball surface are set within specific ranges. | 04-18-2013 |
20130172107 | SOLID GOLF BALL - The invention provides a solid golf ball having a core and a cover. The core is formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The co-crosslinking agent is methacrylic acid, and the rubber composition includes a specific waste material in the form of a powder. The core deflection and the cover material are optimized. Utilizing a waste material in a solid golf ball conserves resources and thus is beneficial to the global environment. Even during prolonged use, the golf ball maintains its basic performance attributes (feel, flight, durability) at a high level. | 07-04-2013 |
20130172108 | SOLID GOLF BALL - The invention provides a solid golf ball having a core and a cover. The core is formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The base rubber contains polybutadiene, a styrene-butadiene rubber and, optionally, an isoprene rubber. The co-crosslinking agent is methacrylic acid, and the rubber composition includes a specific waste material in the form of a powder. The core deflection and the cover material are optimized. Utilizing a waste material in a solid golf ball conserves resources and thus is beneficial to the global environment. Even during prolonged use, the golf ball maintains its basic performance attributes (feel, flight, durability) at a high level. | 07-04-2013 |
20140073461 | GOLF BALL - The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator, a metal oxide and an organosulfur compound. The co-crosslinking agent is methacrylic acid, the metal oxide is zinc oxide, and the rubber composition contains the crosslinking initiator in an amount of from 1.2 to 5 parts by weight per 100 parts by weight of the base rubber. The finished ball has an initial velocity of at least 74.3 m/s. | 03-13-2014 |
Patent application number | Description | Published |
20080217810 | Golf ball manufacturing method - The invention provides a method of manufacturing golf balls having a core and at least one cover layer which involves injecting a molten cover resin material around a core so as to form a cover layer. The cover resin material is a single resin composition made up of (A) a thermoplastic polyurethane, (B) a polyisocyanate compound and (C) a thermoplastic elastomer other than the thermoplastic polyurethane in a weight ratio (A):(B):(C)=100:{2-50}:{0-50}, and is injected with from 10 to 99% of the total number of isocyanate groups in component B remaining in an unreacted state within the cover resin material. The method of the invention provides a high manufacturability and a good amenability to mass production, and the manufactured golf balls thus obtained have a high rebound and excellent scuff resistance. | 09-11-2008 |
20100190575 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core, a cover, at least one intermediate layer interposed therebetween, and a plurality of dimples on a surface of the ball. The respective initial velocities (m/s) of the core, a sphere I composed of the core encased by the intermediate layer, and the golf ball satisfy formula A below, and the respective deflections (mm) of the core, the sphere I composed of the core encased by the intermediate layer, and the golf ball, when compressed under a final load of 130 kg from an initial load of 10 kgf, satisfy formula B below: | 07-29-2010 |
20100190580 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core, a cover, at least one intermediate layer interposed 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 a region 10 mm from the center of the core, the hardness in a region 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, material hardness and material melt flow rate (MFR) 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 composed primarily of a thermoplastic resin, and has a thickness, a hardness and a material melt flow rate (MFR) set within specific ranges. In addition, the number of dimples on the ball and the total dimple trajectory volume (TVT) for the dimples on the ball are set in specific ranges. The golf ball of the invention has an excellent feel, controllability and flight performance. | 07-29-2010 |
20100216571 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a specific, highly neutralized, ionomeric resin composition, has a diameter of from 10 to 38 mm, and has a cross-sectional hardness difference of within ±5 between any two points on a cross-section formed by cutting the inner core layer in half. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 30 to 42 mm. The sum of the respective hardnesses at the center of the inner core layer, at the outer core layer 1 mm outside a boundary between the inner core layer and the outer core layer, at the inner core layer 1 mm inside the boundary, and at the surface of the outer core layer is set to a value in a range of from 260 to 360. Such a golf ball is able to achieve an increased distance. | 08-26-2010 |
20100216572 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 3 to 20 mm, and has a cross-sectional hardness difference of within ±5 between any two points on a cross-section obtained by cutting the inner core layer in half. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. Such a golf ball is able to achieve an increased distance and has a good feel on impact. | 08-26-2010 |
20100216574 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section obtained by cutting the inner core layer in half, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. Such a golf ball is able to achieve an increased distance. | 08-26-2010 |
20110212266 | GOLF BALL MANUFACTURING METHOD - The invention provides a method of manufacturing golf balls having a core and at least one cover layer which involves injecting a molten cover resin material around a core so as to form a cover layer. The cover resin material is a single resin composition made up of (A) a thermoplastic polyurethane, (B) a polyisocyanate compound and (C) a thermoplastic elastomer other than the thermoplastic polyurethane in a weight ratio (A):(B):(C)=100:{2-50}:{0-50}, and is injected with from 10 to 99% of the total number of isocyanate groups in component B remaining in an unreacted state within the cover resin material. The method of the invention provides a high manufacturability and a good amenability to mass production, and the manufactured gold balls thus obtained have a high rebound and excellent scuff resistance. | 09-01-2011 |
20110281669 | GOLF BALL - The invention provides a golf ball having a core and one or more cover layer encasing the core, wherein at least one cover layer is formed by injection-molding a single resin composition of primarily (A) a thermoplastic polyurethane and (B) a polyisocyanate compound, and at least some polyisocyanate compound in which all the isocyanate groups on the molecule remain in an unreacted state is present in the resin composition. The golf ball has a high rebound, an excellent spin performance and an excellent scuff resistance, and the cover layer-forming resin composition has excellent flow properties and an excellent cover layer manufacturability. | 11-17-2011 |
20120108360 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball is composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a thermoplastic resin, and has a cross-sectional hardness difference of within ±5 between any two points on a cross-section obtained by cutting the inner core layer in half. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. | 05-03-2012 |
20140073455 | GOLF BALL - The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The co-crosslinking agent is methacrylic acid. The core has a hardness profile in which, letting (A) be the JIS-C hardness at the core surface, (B) be the JIS-C hardness at a position 2 mm in from the surface toward the center of the core, (C) be the JIS-C hardness at a position 5 mm in from the surface toward the center of the core, (D) be the JIS-C hardness at a position 10 mm in from the surface toward the center of the core, (E) be the JIS-C hardness at a position 15 mm in from the surface toward the center of the core, and (F) be the JIS-C hardness at the center of the core, (A) to (F) have specific hardnesses. | 03-13-2014 |
20140073460 | GOLF BALL - The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The base rubber is a mixture of (A) polybutadiene with (B) styrene-butadiene rubber and/or isoprene rubber, the co-crosslinking agent is methacrylic acid, and the metal oxide is zinc oxide. The rubber composition contains the crosslinking initiator in an amount of from 1.2 to 5 parts by weight per 100 parts by weight of the base rubber. | 03-13-2014 |
Patent application number | Description | Published |
20110204413 | SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD OF THE SAME - In order to improve characteristics of an IGBT, particularly, to reduce steady loss, turn-off time and turn-off loss, a thickness of a surface semiconductor layer is set to about 20 nm to 100 nm in an IGBT including: a base layer; a buried insulating film provided with an opening part; the surface semiconductor layer connected to the base layer below the opening part; a p type channel forming layer formed in the surface semiconductor layer; an n | 08-25-2011 |
20120299056 | METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE AND SEMICONDUCTOR DEVICE - Techniques capable of improving the yield of IGBTs capable of reducing steady loss, turn-off time, and turn-off loss are provided. Upon formation of openings in an interlayer insulting film formed on a main surface of a substrate, etching of a laminated insulating film of a PSG film and an SOG film and a silicon oxide film is once stopped at a silicon nitride film. Then, the silicon nitride film and the silicon oxide film are sequentially etched to form the openings. As a result, the openings are prevented from penetrating through an n-type source layer and a p | 11-29-2012 |
20130207158 | SEMICONDUCTOR DEVICE - To improve a manufacture yield of semiconductor devices each including an IGBT, an active region defined by an insulating film and where an element of an IGBT is formed has a first long side and a second long side spaced at a predetermined distance apart from each other and extended in a first direction in a planar view. One end of the first long side has a first short side forming a first angle with the first long side, and one end of the second long side has a second short side forming a second angle with the second long side. The other end of the first long side has a third short side forming a third angle with the first long side, and the other end of the second long side has a fourth short side forming a fourth angle with the second long side. The first angle, the second angle, the third angle, and the fourth angle are in a range larger than 90 degrees and smaller than 180 degrees. | 08-15-2013 |
20140235020 | METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE AND SEMICONDUCTOR DEVICE - Techniques capable of improving the yield of IGBTs capable of reducing steady loss, turn-off time, and turn-off loss are provided. Upon formation of openings in an interlayer insulting film formed on a main surface of a substrate, etching of a laminated insulating film of a PSG film and an SOG film and a silicon oxide film is once stopped at a silicon nitride film. Then, the silicon nitride film and the silicon oxide film are sequentially etched to form the openings. As a result, the openings are prevented from penetrating through an n-type source layer and a p | 08-21-2014 |