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Golf ball

  • US 8,399,564 B2
  • Filed: 12/24/2009
  • Issued: 03/19/2013
  • Est. Priority Date: 12/26/2008
  • Status: Active Grant
First Claim
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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 high fluidity intermediate layer composition that contains(A) a polyamide resin composition having a flexural modulus in a range from 500 MPa to 4,000 MPa and a melt flow rate (240°

    C., 2.16 kg) of 5.0 g/10 min or more, and containing (a-1) a polyamide resin and (a-2) a resin having at least one functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an anhydride group, a sulfonic acid group, and an epoxy group (including a glycidyl group); and

    (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, andwherein the core has a compression deformation amount of from 1.5 mm to 5.0 mm, when applying an initial load of 98 N to a final load of 1275 N to the core.

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