Multi-layer golf ball
First Claim
Patent Images
1. A golf ball consisting essentially of:
- an inner core layer formed from a thermoset rubber composition and having a center hardness (Hcenter) of 25 Shore C or greater, and an outer surface hardness (Hcenter surface) of 40 Shore C or greater;
an outer core layer formed from a highly neutralized polymer composition and having an outer surface hardness (Houter core surface) of 45 Shore C or greater;
an inner cover layer formed from a thermoplastic composition and having an outer surface hardness (Hinner cover surface) of 50 Shore C or greater;
an intermediate cover layer formed from a thermoplastic composition and having an outer surface hardness (Hintermediate cover surface) of 60 Shore C or greater; and
an outer cover layer formed from a composition selected from the group consisting of ionomeric and non-ionomeric E/X- and E/X/Y-type acid copolymers of ethylene (E), a C3-C8 α
,β
-ethylenically unsaturated carboxylic acid (X), and an optional softening monomer (Y); and
blends of two or more thereof; and
having an outer surface hardness (Houter cover surface);
wherein the golf ball has an overall hardness gradient such that
Hcenter surface<
Houter core surface<
Hinner cover surface<
Hintermediate cover surface<
Houter cover surface.
4 Assignments
0 Petitions
Accused Products
Abstract
Multi-piece golf balls having a multi-layered solid core and multi-layered cover are provided.
-
Citations
2 Claims
-
1. A golf ball consisting essentially of:
-
an inner core layer formed from a thermoset rubber composition and having a center hardness (Hcenter) of 25 Shore C or greater, and an outer surface hardness (Hcenter surface) of 40 Shore C or greater; an outer core layer formed from a highly neutralized polymer composition and having an outer surface hardness (Houter core surface) of 45 Shore C or greater; an inner cover layer formed from a thermoplastic composition and having an outer surface hardness (Hinner cover surface) of 50 Shore C or greater; an intermediate cover layer formed from a thermoplastic composition and having an outer surface hardness (Hintermediate cover surface) of 60 Shore C or greater; and an outer cover layer formed from a composition selected from the group consisting of ionomeric and non-ionomeric E/X- and E/X/Y-type acid copolymers of ethylene (E), a C3-C8 α
,β
-ethylenically unsaturated carboxylic acid (X), and an optional softening monomer (Y); and
blends of two or more thereof; and
having an outer surface hardness (Houter cover surface);wherein the golf ball has an overall hardness gradient such that
Hcenter surface<
Houter core surface<
Hinner cover surface<
Hintermediate cover surface<
Houter cover surface. - View Dependent Claims (2)
-
Specification