摘要:
A golf ball comprising a core, an intermediate layer, and a cover exhibits a good profile of rebound, feel and durability suited for low head speed amateur players when it satisfies the requirements that (Shore D hardness of the cover)−(Shore D hardness of the intermediate layer)>0, (initial velocity (in m/s) of the core enclosed with the intermediate layer)−(initial velocity (in m/s) of the core)>0, 0.90≦(Deflection amount of the core enclosed with the intermediate layer)/(Deflection amount of the core)≦1.00, and the total thickness (in mm) of the intermediate layer and the cover is up to 3.0 mm.
摘要:
In a multi-piece solid golf ball comprising a solid core, a mantle and a cover, the solid core is made of a rubber composition that includes a base rubber containing a polybutadiene synthesized using a rare-earth catalyst, a small amount of organic peroxide, an unsaturated carboxylic acid and/or a metal salt thereof, an organic sulfur compound and an inorganic filler. The mantle is made of a thermoplastic resin composition. The cover is made primarily of a thermoplastic polyurethane material. This construction provides the golf ball with a combination of outstanding flight performance and soft feel with cover's scuff resistance and coating's abrasion resistance, that is unprecedented.
摘要:
Disclosed herein is a multi-piece golf ball composed of a core and an outermost cover layer, with one or more inner cover layers interposed between them, which is characterized in that the core is made mainly of a polybutadiene which is synthesized with using a catalyst of rare earth element such that the content of cis-1,4 bond is no less than 60%, the core has a diameter of 34.7 to 40.7 mm, the core undergoes deflection amounting to 3.0 to 5.0 mm under a load of 100 kg, the outermost cover layer is formed mainly of a thermoplastic resin or elastomer compounded with organic short fibers, the outermost cover layer has a Shore D hardness of 55 to 70 and a thickness of 0.5 to 2.0 mm, and the inner cover layer has a Shore D hardness of 15 to 55 and a thickness of 0.5 to 2.0 mm. The multi-piece golf ball exhibits good flying performance and crack durability. In addition, it gives the player a good striking feel at the time of putting and driver shot.
摘要:
A golf ball having a core, an envelope layer enclosing the core, an intermediate layer enclosing the envelope layer and a cover enclosing the intermediate layer is characterized in that the core is made from a specific rubber composition which has been molded and vulcanized, the envelope layer is made from a thermoplastic resin, the intermediate layer is made from a thermoplastic resin containing at least 30 wt % of an ionomer resin, and the cover is made from a thermoplastic resin containing at least 50 wt % of an ionomer resin. The golf ball is also characterized in that the following have been optimized: the rebound resilience of the thermoplastic resin from which the envelope layer is made, the thickness of the envelope layer, the Shore D hardness of the envelope layer, the thickness of the intermediate layer, the Shore D hardness of the intermediate layer, the thickness of the cover, the Shore D hardness of the cover, the combined thickness of the envelope layer, intermediate layer and cover, and the Shore D hardness distribution among the center of the core, the surface of the core, the envelope layer, the intermediate layer and the cover.
摘要:
In a multi-piece solid golf ball comprising a solid core, a mantle and a cover, the solid core is made of a rubber composition comprising a base rubber containing a polybutadiene synthesized using a rare-earth catalyst, a small amount of organic peroxide, an unsaturated carboxylic acid and/or a metal salt thereof, an organic sulfur compound and an inorganic filler. The mantle is made of a thermoplastic resin composition. The cover is made primarily of a mixture of an ionomer resin-containing resin composition and an inorganic filler. This construction provides the golf ball with a combination of outstanding flight performance and soft feel with cover's scuff resistance and crack durability, that is unprecedented.
摘要:
In a multi-piece solid golf ball comprising a solid core, a mantle and a cover, the solid core is made of a rubber composition that includes a base rubber containing a polybutadiene synthesized using a rare-earth catalyst, a small amount of organic peroxide, an unsaturated carboxylic acid and/or a metal salt thereof, an organic sulfur compound and an inorganic filler. The mantle is made of a thermoplastic resin composition. The cover is made primarily of a mixture containing an amino-terminated block polymer and an ionomer resin. This construction provides the golf ball with a combination of outstanding flight performance, excellent scuff resistance and soft feel that is unprecedented.
摘要:
In a wound golf ball comprising a wound core and a cover, the wound core is formed by winding thread rubber on a center ball of multi-layer structure consisting of an inner sphere and an enclosure layer. The inner sphere has a diameter of 28-37 mm and a distortion of 3.5-10 mm under a load of 100 kg. The enclosure has a melting point higher than the cover molding temperature and a Shore D hardness of 40-75. The center ball has an outer diameter of 33-38 mm and a distortion of 2.5-6 mm under a load of 100 kg. Whether the head speed is high or low, an increased flight distance and improved feel are obtained.
摘要:
In the present invention, by optimizing the balance of Shore D hardness between the intermediate layer and the cover, the balance of Shore D hardness between the surface and the center in the core, the balance of initial velocity between the core and the sphere, and the balance of Deflection amount between the core and the sphere are optimized, and the total thickness of the intermediate layer and the cover, the inventive golf ball is given a good profile of rebound, feel, controllability and durability.
摘要:
An image searching apparatus comprising: a readout section which reads out image data in which an image of a subject and identification information capable of uniquely identifying the subject are related; an input section for inputting identification information indicating a search target subject and an outward characteristic image of the search target subject; a first extraction section which extracts images to which the identification information is related from the image data read out by the readout section; and a second extraction section which compares the images extracted by the first extraction section with the outward characteristic image to extract images which include the outward characteristic image.
摘要:
A golf ball having a core, an intermediate layer enclosing the core and a cover enclosing the intermediate layer is characterized in that the intermediate layer and cover are each made from an ionomer resin-containing thermoplastic resin. The golf ball is also characterized in that the core has a diameter of at least 36.7 mm but not more than 40.7 mm, the core has a deflection when subjected to a load of 100 kg of at least 3.5 but not more than 6.0 mm, the intermediate layer has a thickness of at least 0.50 mm but not more than 1.40 mm, the intermediate layer has a Shore D hardness of at least 40 but not more than 55, the cover has a thickness of at least 0.50 mm but not more than 1.40 mm, the cover has a Shore D hardness of at least 60 but not more than 70, the golf ball has a deflection when subjected to a load of 100 kg of at least 2.8 mm but not more than 4.5 mm, and the deflection by the core under 100 kg load minus the deflection by the golf ball under 100 kg load is less than 1.0 mm.