摘要:
A multi-piece solid golf ball having a core, an envelope layer having an inner envelope layer, intermediate envelope layer and outer envelope layer, an intermediate layer, and a cover having a plurality of dimples formed on a surface thereof, arranged in that order. The three envelope layers, intermediate layer and cover are each formed primarily of a resin material of the same or different types. The core is formed primarily of a rubber material, and has a material hardness higher than the core center hardness. One of the inner layers has a material hardness higher than either or both of the cover material hardness and the average core hardness. The golf ball lowers the spin rate on full shots with a driver, increases the distance traveled by the ball, has good controllability, maintains a straight path particularly on full shots, has a good feel on impact and excellent scuff resistance.
摘要:
The present invention provides a multi-piece solid golf ball having a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and a cover which encases the intermediate layer and has, on a surface thereof a plurality of dimples. The envelope layer has an inner layer and an outer layer. The core is formed primarily of a rubber material. The inner and outer envelope layers, the intermediate layer and the cover are each formed primarily of the same or different resin materials. The inner and outer envelope layers, intermediate layer and cover have thicknesses and hardness values which satisfy particular specified inequalities and which occupy particular specified ranges. The golf ball has an outstanding flight performance and controllability which are acceptable to professionals and other skilled players, in addition to which it has an excellent durability to cracking under repeated impact and an excellent scuff resistance.
摘要:
The present invention provides a golf ball having a resilient core made of rubber, a cover of one or more layer encasing the core, and at least one intermediate layer disposed between the core and the cover, wherein the cover is made primarily of polyurethane, the intermediate layer is made primarily of ionomer, and the core has a surface hardness which is higher than the material hardnesses of the cover and the intermediate layer. The golf ball is able to limit the distance of travel more than official balls currently in use and, in spite of being a limited-distance golf ball, imparts a relatively soft and good ball feel on impact, in addition to which it has an excellent scuff resistance and, by minimizing the extent of decrease in the distance traveled by the ball when hit with an iron, minimizes the effect on golf play by amateur golfers.
摘要:
The invention provides a multi-piece solid golf ball having a core, an envelope layer enclosing the core, an intermediate layer enclosing the envelope layer, and a cover which encloses the intermediate layer and has formed on a surface thereof a plurality of dimples. The core is formed primarily of a rubber material and has a diameter of at least 31 mm, the envelope layer and the intermediate layer are each formed primarily of the same or different resin materials, and the cover is formed primarily of polyurethane. The envelope layer, intermediate layer and cover have thicknesses which satisfy the relationship cover thickness cover surface hardness. The golf ball has an excellent flight performance and controllability that are acceptable to professionals and other skilled golfers, while also having an excellent durability to cracking on repeated impact and an excellent scuff resistance.
摘要:
The present invention provides a multi-piece solid golf ball having a core, an envelope layer, an intermediate layer, and a cover, in this order, and has formed on a surface thereof a plurality of dimples. The core has a hardness which gradually increases from a center to a surface thereof, the hardness difference in JIS-C hardness units between the core center and the core surface being at least 15 and, letting (I) be the average value for cross-sectional hardnesses at a position about 15 mm from the core center and at the core center and letting (II) be the cross-sectional hardness at a position about 7.5 mm from the core center, the hardness difference (I)-(II) in JIS-C units being not more than ±2. The envelope layer, intermediate layer and cover have hardnesses which satisfy the condition: cover hardness>intermediate layer hardness>envelope layer hardness.
摘要:
A resin composition for blow molding is provided, made by formulating 0 to 30 weight parts of an inorganic filler based on 100 weight parts of a resin composition having of: 20 to 95% by weight of polypropylene resin having a melting point evaluated by a differential scanning calorimeter (DSC) of 160° C. or higher, the polypropylene resin being formulated of a propylene-ethylene block copolymer having an ethylene content of 3 to 15% by weight; and 5 to 80% by weight of polyethylene resin having a melting point evaluated by a differential scanning calorimeter (DSC) of 130° C. or higher, and a tensile break strength is 250 Kg/cm3 or more at ambient temperature, and a tensile break elongation is 500% or more.
摘要翻译:提供一种吹塑成型用树脂组合物,其通过配合0〜30重量份的无机填料,以100重量份的树脂组合物为基准,所述树脂组合物具有20〜95重量%的熔点通过差分评价的聚丙烯树脂 扫描量热计(DSC)为160℃以上,聚丙烯树脂由乙烯含量为3〜15重量%的丙烯 - 乙烯嵌段共聚物配制而成; 和5〜80重量%的通过差示扫描量热计(DSC)评价的熔点为130℃以上的聚乙烯树脂,在环境温度下的拉伸断裂强度为250Kg / cm 3以上, 断裂伸长率为500%以上。
摘要:
A method of producing substrate 3 having feedthrough electrodes for an inkjet head, including: a step of forming grooves in the substrate 1 in the same pitch as that of the inkjet head; a step of setting conductive member 101 in the grooves; a step of adhering covering substrate 2 onto substrate 1; a step of cutting adhered substrate 1 and covering substrate 2 in a direction perpendicular to that of the grooves in a predetermined width.
摘要:
In a harmonica type head chip having a plurality of rows of channels (row A and row B), connection electrodes for row A and the connection electrodes for row B formed on the back surface of the head chip are connected to a multilayer member having an insulating layer on one surface of which are formed the lead wirings for row A and on the other surface of which are formed the lead wirings for row B, and the lead wirings for row B are made to protrude outwards more than the lead wirings for row A and drive interconnections are electrically connected to the lead wirings for row A and the lead wirings for row B.
摘要:
A spline rolling tool including a plurality of forming teeth that are to bite into a cylindrical workpiece so as to roll splines in the workpiece. Each of the forming teeth has an incomplete toothed region in which a crest of each forming tooth is removed such that an upper end of each forming tooth in the incomplete toothed region is defined by an incomplete-toothed region surface that includes a curved surface portion, a flat surface portion and a slant surface portion. The incomplete-toothed region surface is defined at its periphery by a chamfered edge that has a surface roughness of not larger than about 3.2 μm. Also disclosed is a process of manufacturing the spline rolling tool, which includes a chamfering step of forming the chamfered edge by using a wire brush having abrasive grains that are fixed to bristles of the wire brush.
摘要:
On the back surface of a head chip having a plurality of rows of channels (row A, row B), the connection electrodes for row A that are electrically connected to the drive electrodes of the channels of row A are arranged, a first connection electrodes for row B that are electrically connected to the drive electrodes of the channels of row B are arranged between the rows of channels of row A and the rows of channels of row B, and also, between neighboring connection electrodes for row A, a second connection electrodes for row B are separately placed from the first connection electrodes for row B, the first connection electrodes and the second connection electrodes are connected electrically by drawing out interconnections, and the drawing out interconnections are in contact only with the first connection electrodes, the second connection electrodes, and the back surface of the head chip.