A golf ball comprising a core composed of a fully neutralized polymer material is disclosed herein. The golf ball also preferably has multiple mantle layers and a cover.

Golf ball dimples having a surface defined by a mode, or a weighted superposition of multiple modes, of oscillation of a circular membrane are disclosed.

An article (600) is provided which includes a body (500) having an interior volume (100), and hook (124) and loop (125) features which, when pressed closed in at least one locations (130, 131) location, creates a dynamic hammock dam (132) that retains a fill material (140) that has been inserted into the interior volume. The strength of the hammock dam increases with outward pressure (141) applied on the closure by the fill material. The article is preferably equipped with a large mouth opening (110) which allows rapid filling or emptying of the fill material from the internal volume.

A toy having three bobs on a string where the middle bob slides. A low moment of inertia of the middle bob is desirable because it minimizes tangling of the string about the middle bob and produces smooth, tactile-appealing orbits. Each bob has a pair of mated throughbore pieces sandwiching a central metal weight and an equatorial bag stuffed with low-density pellets. Concave sections (in profile on a plane along the polar axis) of the throughbore occupy a substantial portion of the length of the throughbore to take best advantage of the torques produced by the string by focusing the tension of the string at the mouths of the throughbore. The concave sections also reduce the volume occupied by the bag, thereby reducing moment of inertia. Additionally, hollows in the concave regions of the throughbore pieces further reduce the moment of inertia.

A toy having three bobs on a string where the middle bob slides. A low moment of inertia of the middle bob is desirable because it minimizes tangling of the string about the middle bob and produces smooth, tactile-appealing orbits. Each bob has a pair of mated throughbore pieces sandwiching a central metal weight and an equatorial bag stuffed with low-density pellets. Concave sections (in profile on a plane along the polar axis) of the throughbore occupy a substantial portion of the length of the throughbore to take best advantage of the torques produced by the string by focusing the tension of the string at the mouths of the throughbore. The concave sections also reduce the volume occupied by the bag, thereby reducing moment of inertia. Additionally, hollows in the concave regions of the throughbore pieces further reduce the moment of inertia.

A golf ball fabrication method comprises Step a: providing a core; Step b: spraying a thin resin film on the surface of the core to form a conductive layer; Step c: vacuum-electroplating the surface of the core to form a glossy thin metallic film functioning as a reflective layer; and Step d: encapsulating the glossy thin metallic film with a transparent resin layer in an injection-molding technology to form a transparent outer layer of the golf ball. The method can fabricate in a simple way a golf ball having a superior reflective effect and a long service life simultaneously.

A golf ball fabrication method comprises Step a: providing a core; Step b: spraying a thin resin film on the surface of the core to form a conductive layer; Step c: vacuum-electroplating the surface of the core to form a glossy thin metallic film functioning as a reflective layer; and Step d: encapsulating the glossy thin metallic film with a transparent resin layer in an injection-molding technology to form a transparent outer layer of the golf ball. The method can fabricate in a simple way a golf ball having a superior reflective effect and a long service life simultaneously.

The present invention provides a resin composition for a golf ball cover, wherein, since the resin composition for a golf ball cover according to the present invention minimizes changes in physical properties due to temperature changes and improves restitution characteristics, the resin composition for a golf ball cover may reduce performance deviations of a golf ball due to seasonal temperature changes and may improve a spin rate of the golf ball.

The present invention provides a resin composition for a golf ball cover, wherein, since the resin composition for a golf ball cover according to the present invention minimizes changes in physical properties due to temperature changes and improves restitution characteristics, the resin composition for a golf ball cover may reduce performance deviations of a golf ball due to seasonal temperature changes and may improve a spin rate of the golf ball.

A golf ball material includes (A) one or more resin ingredient selected from the group consisting of olefin-unsaturated carboxylic acid random copolymers, olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester random copolymers, and metal ion neutralization products of these copolymers; (D) an amino compound having at least 2 amino groups per molecule; (B) one or more resin ingredient selected from the group consisting of polyethylene, polyesters and polyamide elastomers; and (C) an agent for compatibilizing components (A) and (B). The compatibilizing agent (C) includes: (C-i) two different types of base polymer selected from a specific group, (C-ii) a hydrogenated diene polymer having at least one type of functional moiety selected from a specific group of moieties, and (C-iii) an olefinic polymer having at least one type of functional moiety selected from a specific group of moieties.