GOLF BALL
First Claim
1. A golf ball comprising:
- a core consisting of a center and one or more intermediate layers covering the center; and
a cover covering the core,wherein at least one piece or one layer of said intermediate layers is formed from a highly elastic intermediate layer composition that contains(A) a highly elastic polyamide resin having a flexural modulus in a range from 700 MPa to 5,000 MPa;
(B) a metal-neutralized product of ethylene-(meth)acrylic acid copolymer in an amount ratio ((A)/(B)) of (A) the highly elastic polyamide resin to (B) the metal-neutralized product of ethylene-(meth)acrylic acid copolymer being (20 mass % to 80 mass %)/(80 mass % to 20 mass %) (the total is 100 mass %); and
(C) a resin having a polar functional group in an amount of 0.1 part by mass to 30 parts by mass with respect to 100 parts by mass of the sum of (A) the highly elastic polyamide resin and (B) the metal-neutralized product of ethylene-(meth)acrylic acid copolymer.
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Accused Products
Abstract
An object of the present invention is to provide a golf ball having an excellent properties like flight distance and low temperature durability. The present invention provides a golf ball comprising: a core consisting of a center and one or more intermediate layers covering the center; and a cover covering the core, wherein at least one piece or one layer of said intermediate layers is formed from a highly elastic intermediate layer composition that contains (A) a highly elastic polyamide resin having a flexural modulus in a range from 700 MPa to 5,000 MPa; (B) a metal-neutralized product of ethylene-(meth)acrylic acid copolymer and (C) a resin having a polar functional group in a specific way.
57 Citations
20 Claims
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1. A golf ball comprising:
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a core consisting of a center and one or more intermediate layers covering the center; and a cover covering the core, wherein at least one piece or one layer of said intermediate layers is formed from a highly elastic intermediate layer composition that contains (A) a highly elastic polyamide resin having a flexural modulus in a range from 700 MPa to 5,000 MPa; (B) a metal-neutralized product of ethylene-(meth)acrylic acid copolymer in an amount ratio ((A)/(B)) of (A) the highly elastic polyamide resin to (B) the metal-neutralized product of ethylene-(meth)acrylic acid copolymer being (20 mass % to 80 mass %)/(80 mass % to 20 mass %) (the total is 100 mass %); and (C) a resin having a polar functional group in an amount of 0.1 part by mass to 30 parts by mass with respect to 100 parts by mass of the sum of (A) the highly elastic polyamide resin and (B) the metal-neutralized product of ethylene-(meth)acrylic acid copolymer. - View Dependent Claims (2, 3, 4, 5)
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6. A golf ball comprising:
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a core consisting of a center and one or more intermediate layers covering the center; and a cover covering the core, wherein at least one piece or one layer of said intermediate layers is formed from a highly elastic intermediate layer composition that contains (A) a highly elastic polyamide resin having a flexural modulus in a range from 700 MPa to 5,000 MPa; (B) a metal-neutralized product of ethylene-(meth)acrylic acid copolymer; and (C) a resin having a polar functional group, and the highly elastic intermediate layer composition has a hardness in a range from 65 to 75 in Shore D hardness, a flexural modulus in a range from 300 MPa to 1,000 MPa, and a tensile modulus in a range from 400 MPa to 1,500 MPa regarding slab properties. - View Dependent Claims (7, 8, 9, 10)
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11. A golf ball comprising:
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an outer core consisting of a center and one or more intermediate layers covering the center; and a cover covering the outer core, wherein the outer core consists of an inner core having the center and a surrounding layer disposed outside the center, and the intermediate layer disposed outside the inner core, and the inner core has a surface hardness H4 which is equal to or less than the surface hardness H6 of the outer core, and the cover has a hardness H7 of 50 or less in Shore D hardness, wherein the intermediate layer is formed from a highly elastic intermediate layer composition that contains (A) a highly elastic polyamide resin having a flexural modulus in a range from 700 MPa to 5,000 MPa; (B) a metal-neutralized product of ethylene-(meth)acrylic acid copolymer in an amount ratio ((A)/(B)) of (A) the highly elastic polyamide resin to (B) the metal-neutralized product of ethylene-(meth)acrylic acid copolymer being (20 mass % to 80 mass %)/(80 mass % to 20 mass %) (the total is 100 mass %); and (C) a resin having a polar functional group in an amount of 0.1 part by mass to 30 parts by mass with respect to 100 parts by mass of the sum of (A) the highly elastic polyamide resin and (B) the metal-neutralized product of ethylene-(meth)acrylic acid copolymer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. The golf ball according to claim 20, wherein (A) the highly elastic polyamide resin is at least one selected from the group consisting of polyamide 6, polyamide 11, polyamide 12, polyamide 66, polyamide 610, polyamide 6T, polyamide 6I, polyamide 9T, polyamide M5T, polyamide 612 and a polyetherblock amide copolymer, and (C) the resin having a polar functional group is at least one selected from a group consisting of an ethylene-glycidyl methacrylate copolymer, an ethylene-acrylic acid-glycidyl methacrylate copolymer, and a methyl methacrylate-glycidyl methacrylate copolymer.
Specification