A golf ball including an outer surface having dimples located on the outer surface, at least one core, at least one mantle layer, at least one cover layer, and a plurality of images located on the outer surface, the images being provided with at least two contrasting colors, wherein the plurality of images each have a Major Peak Ratio of between 0.18 and 1, a Major Valley Ratio of between 0.18 and 1, a slope value of between -5 and 5, and an intercept value between 5 and 80.

A golf ball can include a core, a mid layer, and a cover. The golf ball can satisfy the following mathematical formulas (1) and (2),

(Fa/Fan)≤0.90  (1),

(Fa/Fan).sup.2/(Fp/Fpn)≤0.90  (2),

wherein Fa represents a maximum vertical force of the golf ball measured under a first condition. Fan represents a maximum vertical force of a standard ball measured under the first condition, Fp represents a maximum vertical force of the golf ball measured under a second condition, and Fpn represents a maximum vertical force of the standard ball measured under the second condition.

An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound includes (d1) a polythiophene compound having two or more thiophene rings in the molecule.

The present disclosure relates to a golf ball, wherein dimples having an extraordinary flight performance by combining the advantages of both circular dimples and polygonal dimples in the related art, in other words, by arranging the combined dimples that give depth to the face of the combined polygon and circle of the same center on the surface of the sphere, the trajectory is bent due to the influence of wind, which is a disadvantage of the conventional polygonal dimples. It is excellent in flight straightness by eliminating the effect, and when flying after hitting, the vertex region, which acts as a small bluff body, rotates and breaks the pressure in advance, causing a quick turbulent transition, and it becomes like an arc of a circular dimple instead of the sides of the general polygonal dimples.

Methods of forming dual core golf ball constructions achieving consistent and repeatable concentricity by incorporating a pair of novel hemispherical shells produced using an inventive center plate button. The pair of resulting novel hemispherical shells may be collectively compression molded about and reliably center a spherical inner core there within due to the novel resulting centering features and structure provided on the inner surface of each hemispherical shell by the novel center plate button used to form same. Securing features and structure are thereby provided within/on inner surfaces of resulting hemispherical shells in order to prevent undesirable movement of the spherical inner core there within until the final compression molding step occurs.

The present invention provides a method for arranging dimples on a golf ball surface in which the dimples are arranged in a pattern derived from at least one irregular domain generated from a regular or non-regular polyhedron. The method includes choosing control points of a polyhedron, generating an irregular domain based on those control points, packing the irregular domain with dimples, and tessellating the irregular domain to cover the surface of the golf ball. The control points include the center of a polyhedral face, a vertex of the polyhedron, a midpoint or other point on an edge of the polyhedron and others. The method ensures that the symmetry of the underlying polyhedron is preserved while minimizing or eliminating great circles due to parting lines.

The present invention relates generally to a novelty golf ball that has a plurality of internal electrical components capable of storing and playing a sound recording when motion of the novelty golf ball is detected. The body of the novelty golf ball may be of unitary construction or comprised of two separate halves that may be removably attached to one another to allow a user to access the electrical components stored on the interior of the novelty golf ball.

A golf ball core, mantle, and/or cover layer(s) of golf ball having a composition comprising functionalized aluminosilicate particles having a particle size of less than 50 μm is disclosed herein. The aluminosilicate microspheres with an average diameter less than 50 μm are functionalized with, but not limited to, polysulfide, vinyl, amino, epoxy, hydroxyl, carboxyl, methacryloyl, hydrocarbon, mercapto and isocyanate.

A method for forming a golf ball core with a nanofiller masterbatch is disclosed herein. The method includes mixing the nanofiller masterbatch, a graphene masterbatch material with other materials to form a core mixture, wherein the masterbatch preferably comprises 1-80% by weight of nanofillers and 20-99% by weight of a carrier polymer.

In a golf ball having a rubber core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) a (meth)acrylic block copolymer, the (meth)acrylic block copolymer serving as component (II) being included in an amount of 20 parts by weight or less per 100 parts by weight of component (I). The golf ball has an excellent controllability on approach shots and is able to maintain a good scuff resistance and moldability.