Other

Kametani Sangyo Kabushiki Kaisha

Bridgestone Sports Co., Ltd.

Ryuhei Kametani

Takashi Ohira

Susumu Muta

Masaru Hirukawa

Provided as ink for a golf ball for use in marking a golf ball is ink for a golf ball including an ink resin having a predetermined hydroxyl value and block isocyanate. When marking a golf ball by using the ink of the present invention, a hydroxyl group in the ink resin in an ink layer and an isocyanate group derived from the block isocyanate react with each other to increase hardness of the ink layer, thereby improving abrasion resistance of the marking. In addition, the isocyanate group derived from the block isocyanate and a functional group of an ionomer resin on the ball surface react with each other to improve adhesiveness of marking to the ball surface. Furthermore, the hydroxyl group of the ink resin and an isocyanate group in a urethane top coat layer react with each other to increase strength of the ink layer, thereby improving hitting resistance of the marking. Then, nitrogen in urethane bonding generated by the reaction between the hydroxyl group in the ink layer and the isocyanate group and the isocyanate group in the urethane top coat layer react with each other to further improve abrasion resistance of the marking.

Ink for golf ball, transfer printing film for golf ball and marked golf ball

A golf ball having a mark with a distinct appearance unrealizable by only changing in tint. Ink can be prepared by mixing one or more components which provide luster such as pearl particles, shell particles, mica particles and the like in an ink medium. Therefore, ink can be used for marking the surface of the golf ball by an indirect printing used with a transfer printing film or a direct printing such as a pad printing, a screen printing and the like. The composition of the ink is 5 to 150 parts by weight of the mica, pearl particles and the like. The mica, the pearl particles and the like are employed for flat forms.

Marked golf ball and method for marking golf ball

A golf ball is provided which bears a mark having a distinct metallic lustered appearance, being superior in durability. The mark is printed by using a transfer printing film having an ink layer containing a pigment and metal particles. An ink composition, defining the ink layer, contains 20 to 35 parts by weight of a metal dispersion relative to 1 to 5 parts by weight of a pigment. The metal particle is in a flattened form and a content of the particles in the dispersion is 5 to 15%. An average thickness of the flattened metal particles is 50 to 500 angstroms and an average diameter 10 to 60 microns. Aluminum, chromium, cobalt, steel, silver, gold or nickel alloy are employed as the metal of the particle.

Golf ball

A golf ball is provided which bears a mark having a distinct appearance unrealizable by only changing in tint. Ink can be prepared by mixing one or more than two components which can afford luster such as pearl particles, shell particles, mica particles and the like in an ink medium. Thereafter the ink can be used for marking the surface of the golf ball by an indirect printing used with a transfer printing film or a direct printing such as a pad printing, a screen printing and the like. The composition of the ink is 5 to 150 parts by weight of the mica, pearl particles and the like. The mica, the pearl particles and the like are employed for flat forms.

Marked golf ball and method for marking a golf ball

Transfer printing film and golf ball marked by the same

A marked golf ball is provided. The mark on the ball surface contains a holographic portion in a solid color portion of printing ink. The mark is printed on the ball surface by use of a transfer printing film. In a manufacturing process of the printing film, a desired shape is printed in ink on a cover layer, the ink portion is masked by a water-soluble layer, a thin metal layer is deposited all around, and then the water-soluble layer is washed off to remove the metal layer on the water-soluble layer and to leave the metal layer adjacent to the ink portion on the cover layer. The remaining portion of the metal layer turns to be the holographic portion due to a rough boundary between the cover layer. The mark has a novel appearance and makes the golf ball a quality, decorative, distinct and well discriminative value added product.

Marked golf ball and manufacturing process thereof

The invention provides a transfer printing film for thermally printing patterns on golf balls. An ink layer disposed on one side of a substrate film contains as a main vehicle a polyamide bearing methoxymethyl group or a vinylchloride-vinylacetate-vinylalcohol copolymer bearing hydroxyl group. Softening point of the polyamide or the copolymer is relatively low, and thus, the pattern formed by the ink layer is transfered at a lower temperature. Both the methoxymethyl group of the polyamide and the hydroxyl group of the copolymer reacts with isocyanate group to form urethane bond, and thus, in the operation of finishing the golf ball with a two-component urethane paint, urethane bondings are formed between the urethane clear top coat and the printed pattern.

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Osaka, Japan

Ryuhei Kametani