摘要:
An object of the present invention is to provide a golf ball excellent in fluidity, adhesion of the paint film, and repulsion. Another object of the present invention is to provide a golf ball which is excellent in durability and low-temperature durability. The present invention provides a golf ball comprising: a core and a cover covering the core, wherein the cover is formed from a cover composition that contains as a resin component, (a) a specific high melt viscosity ionomer resin being neutralized with at least two metal ions, and (b) a low melt viscosity ionomer resin being neutralized with at least two metal ions, in a ratio of (a) the high melt viscosity ionomer resin/(b) the low melt viscosity ionomer resin being 55 mass % to 99 mass %/45 mass % to 1 mass %, wherein at least one of metal ions neutralizing carboxyl groups of (a) the high melt viscosity ionomer resin and/or (b) the low melt viscosity ionomer resin is a divalent metal ion and a content of the divalent metal ion per 100 g of the resin component is at least 0.020 mole.
摘要:
An object of the invention is to provide a golf ball excellent in the durability at the normal and low temperatures, flight distance, direction stability and shot feeling on the shots. The present invention provides a golf ball comprising: a core consisting of a center having a diameter of 35 mm or less and a surrounding layer covering the center; at least one intermediate layer covering the core, said intermediate layer having a thickness ranging from 0.5 mm to 1.2 mm and a density of 1.10 g/cm3 or more; and a cover covering the intermediate layer and having a thickness ranging from 0.3 mm to 1.0 mm, wherein the cover is formed of a cover composition that has a slab hardness ranging from 65 to 75 in Shore D hardness and contains as a resin component; (A) a polyamide resin composition having a flexural modulus in a range from 700 MPa to 4,000 MPa and a melt flow rate (240° C., 2.16 kg) of 5.0 g/10 min or more; (B) at least one member selected from the group consisting of an ethylene-(meth)acrylic acid binary copolymer, a metal-neutralized product of the binary copolymer, an ethylene-(meth)acrylic acid-(meth)acrylic acid ester ternary copolymer, and a metal-neutralized product of the ternary copolymer; and (C) a fluidity improving agent.
摘要:
An object of the invention is to provide a golf ball excellent in the durability at the normal and low temperatures, flight distance, and shot feeling on the shots. Another object of the present invention is to provide a golf ball excellent in a direction stability on the shots. The present invention provides a golf ball comprising: a core consisting of at least one layer; and a cover covering the core and having a thickness ranging from 0.3 mm to 1.0 mm, wherein the cover is formed from a cover composition that contains as a resin component, (A) a highly elastic polyamide resin (B) a metal-neutralized product of binary copolymer and/or ternary copolymer, and (C) a resin having a polar functional group in a specific amount, and wherein the cover composition has a slab hardness ranging from 65 to 75 in Shore D hardness.
摘要:
An object of the invention is to provide a golf ball excellent in the durability at the normal and low temperatures, flight distance, and shot feeling on the shots. Another object of the present invention is to provide a golf ball excellent in a direction stability on the shots. The present invention provides a golf ball comprising: a core consisting of at least one layer; and a cover covering the core and having a thickness ranging from 0.3 mm to 1.0 mm, wherein the cover is formed from a cover composition that contains as a resin component, (A) a highly elastic polyamide resin (B) a metal-neutralized product of binary copolymer and/or ternary copolymer, and (C) a resin having a polar functional group in a specific amount, and wherein the cover composition has a slab hardness ranging from 65 to 75 in Shore D hardness.
摘要:
An object of the invention is to provide a golf ball excellent in the durability at the normal and low temperatures, flight distance, direction stability and shot feeling on the shots. The present invention provides a golf ball comprising: a core consisting of a center having a diameter of 35 mm or less and a surrounding layer covering the center; at least one intermediate layer covering the core, said intermediate layer having a thickness ranging from 0.5 mm to 1.2 mm and a density of 1.10 g/cm3 or more; and a cover covering the intermediate layer and having a thickness ranging from 0.3 mm to 1.0 mm, wherein the cover is formed of a cover composition that has a slab hardness ranging from 65 to 75 in Shore D hardness and contains as a resin component; (A) a polyamide resin composition having a flexural modulus in a range from 700 MPa to 4,000 MPa and a melt flow rate (240° C., 2.16 kg) of 5.0 g/10 min or more; (B) at least one member selected from the group consisting of an ethylene-(meth)acrylic acid binary copolymer, a metal-neutralized product of the binary copolymer, an ethylene-(meth)acrylic acid-(meth)acrylic acid ester ternary copolymer, and a metal-neutralized product of the ternary copolymer; and (C) a fluidity improving agent.
摘要:
A golf ball 2 includes a core 4, a mid layer 6, and a cover 8. The difference between: a hardness H(5.0) at a point located at a distance of 5 mm from the central point of the core 4; and a hardness Ho at the central point is 6.0 or greater. The difference between: a hardness H(12.5) at a point located at a distance of 12.5 mm from the central point; and the hardness H(5.0) is 4.0 or less. The difference between a hardness Hs at the surface of the core 4 and the hardness H(12.5) is 10.0 or greater. The difference between the hardness Hs and the hardness Ho is 22.0 or greater. In the core 4, there is no zone in which a hardness decreases from the central point to the surface. A hardness H3 of the cover 8 is greater than a hardness H2 of the mid layer 6. The cover 8 is formed from a resin composition containing a polyamide copolymer including a polymerized fatty acid (a-1), sebacic acid and/or azelaic acid (a-2), and a polyamine component (a-3).
摘要:
An object of the present invention is to provide a golf ball excellent in resilience and durability, with a good moldability of the intermediate layer. The present invention provides a golf ball having a center, a cover, and an intermediate layer disposed between the center and the cover, wherein the intermediate layer is formed from an intermediate layer composition having a flexural modulus ranging from 150 MPa to 450 MPa, a maximum loss factor (tan δ) between −20° C. and 0° C. of 0.08 or less, a rebound resilience of 55% or more, and a slab hardness ranging from 40 to 60 in Shore D hardness, and the intermediate layer composition comprises, as a resin component, 30 mass % to 70 mass % of (A) a modified polyester elastomer having a Shore A hardness of 95 or less; 70 mass % to 30 mass % of (B) a binary ionomer resin having a Shore D hardness of 65 or more, a flexural modulus of 300 MPa or more, and a melt flow rate (190° C., 2.16 kg) of 1.0 g/10 min or more; and 0 mass % to 50 mass % of (C) a thermoplastic resin other than (A) component and (B) component (provided that a total content of (A) component, (B) component, and (C) component is 100 mass %).
摘要翻译:本发明的目的是提供一种弹性和耐久性优异的高尔夫球,并且具有良好的中间层成形性。 本发明提供了一种高尔夫球,其具有设置在中心和盖之间的中心,盖和中间层,其中中间层由弯曲模量为150MPa至450MPa的中间层组合物形成, -20℃和0℃之间的最大损耗因子(tanδ)为0.08以下,回弹性为55%以上,板状硬度为肖氏D硬度为40〜60,中间层 作为树脂成分,作为树脂成分,含有30质量%〜70质量%的(A)肖氏A硬度为95以下的改性聚酯弹性体, (B)肖氏D硬度为65以上,弯曲弹性模量为300MPa以上,熔体流动速率(190℃,2.16kg)的二元离聚物树脂为70质量%〜30质量% g / 10分钟以上; 和(A)成分和(B)成分以外的(C)热塑性树脂的0质量%〜50质量%(条件是(A)成分,(B)成分和(C)成分的总含量为100 质量%)。
摘要:
An object of the present invention is to provide a golf ball excellent in fluidity, adhesion of the paint film, and repulsion. Another object of the present invention is to provide a golf ball which is excellent in durability and low-temperature durability. The present invention provides a golf ball comprising: a core and a cover covering the core, wherein the cover is formed from a cover composition that contains as a resin component, (A) a specific high melt viscosity ionomer resin being neutralized with at least two metal ions, and (B) a low melt viscosity ionomer resin being neutralized with at least two metal ions, in a ratio of (A) the high melt viscosity ionomer resin/(B) the low melt viscosity ionomer resin being 55 mass % to 99 mass %/45 mass % to 1 mass %.
摘要:
An objective of the present invention is to provide a golf ball striking a balance between the flight distance on the driver shots and the approach performance on the approach shots and having the excellent shot feeling and durability. The present invention provides a golf ball comprising a core consisting of a center and a surrounding layer covering the center; at least one intermediate layer covering the core; and a cover covering the intermediate layer; wherein at least one piece or one layer of the intermediate layer is formed from a highly elastic intermediate layer composition that contains (A) a highly elastic resin having a flexural modulus in a range from 700 MPa to 5,000 MPa and (B) an ionomer resin having a flexural modulus in a range from 150 MPa to 1,000 MPa in a content ratio ((A)/(B)) of (A) the highly elastic resin to (B) the ionomer resin (B) being (20 mass % to 80 mass %)/(80 mass % to 20 mass %) (the total is 100 mass %), and wherein a surface hardness (Hm) of the intermediate layer and a surface hardness (Hs) of the core satisfy the equation: Hm≧Hs, and the cover has a slab hardness (Hc) of 45 or less in Shore D hardness.
摘要:
The present invention provides a golf ball with excellent abrasion-resistance, durability and resilience having an ionomer resin cover therein. The ionomer composition for the golf ball of the invention comprises a reaction product obtained by reacting a telechelic copolymer having functional groups introduced in both terminals of a binary copolymer formed by copolymerizing an olefin monomer having 2 to 8 carbon atoms and an unsaturated carboxylic acid having 2 to 18 carbon atoms, and/or a ternary copolymer formed by copolymerizing an olefin monomer having 2 to 8 carbon atoms, an unsaturated carboxylic acid having 2 to 18 carbon atoms and an unsaturated carboxylic acid ester with a hydroxyl group-containing compound or an isocyanate group-containing compound, wherein at least 10 mole % of a carboxylic group in said reaction product is neutralized with an inorganic metal.