Sumitomo Rubber Industries Limited

Noritz Corporation

Sri Sports Limited

Mu Instrument Trading Corp.

Sumio Gomu Kogyo Kabushiki Kaisha

Hiroaki Tanaka

Hideki Sano

Yoshiyuki Okido

Kazuyoshi Shiga

Kunio Niwa

Takehiko Hyodo

Masanori Taguchi

Fumiya Suzuki

Yoshinori Sano

Masaaki Kikuchi

Yutaka Yoshida

Keiji Moriyama

Kazuhisa Fushihara

Yoshikazu Yabuki

Tetsunori Kuriyama

Masatoshi Yokota

Seiichiro Endo

Takeshi Asakura

Tsutomu Hirau

Kohei Mimura

Takahide Hasegawa

Kouhei Takemura

Hitoshi Itani

Tomofumi Kinugasa

Hirotoshi Murakami

Kengo Horiuchi

Eiji Kanki

Yuko Kujirai

Hiroshi Hirata

Takayuki Tanaka

Takayuki Saimen

Yuko Sakurai

Hiromasa Yamamoto

Satoru Komatsu

Yoshiyuki Nakai

Kentaro Masumoto

Naoki Baba

Haruki Shinagawa

Yuta Shimane

Hiroaki Matsubara

Keiichi Mandai

Jun Doi

Isao Sato

Makoto Kusakabe

An aqueous adhesive for rubber includes rubber latex and an ammonium-salt-based vulcanization acceleration aid. An amount of the ammonium-salt-based vulcanization acceleration aid contained in the aqueous adhesive is preferably not less than 0.01% by weight and not greater than 5.0% by weight in terms of solid content. An aqueous adhesive for a ball includes rubber latex as a main component. A content of an inorganic filler in the aqueous adhesive is not greater than 0.1% by weight in terms of solid content. A ballincludes a hollow coreobtained by crosslinking a rubber composition that contains a vulcanizing agent. The coreis formed of two hemispherical half cores. The two half cores are adhered to each other by using the aqueous adhesive for a ball.

Aqueous adhesive for rubber and aqueous adhesive for ball

A rubber composition for a hollow ball includes a base rubber and an inorganic filler. A weight reduction rate TGAfrom room temperature to 650&#xb0; C. and a weight reduction rate TGAfrom room temperature to 850&#xb0; C. of the rubber composition are measured under an air atmosphere by thermogravimetry conforming to JIS K0129. The weight reduction rate TGAof the rubber composition is not less than 63% and not greater than 99%. A difference (TGA&#x2212;TGA) between the weight reduction rates TGAand TGAof the rubber composition is not less than 0% and not greater than 7%. A hollow ballincludes a hollow coreformed from the rubber composition.

Rubber composition for hollow ball and hollow ball

A rubber composition for a tennis ball includes a base rubber and a filler having a degree of flatness DL of not less than 50, the degree of flatness DL being obtained by dividing an average particle diameter D(&#x3bc;m) of the filler by an average thickness T (&#x3bc;m) of the filler. An amount of the filler per 100 parts by weight of the base rubber is not less than 1 part by weight and not greater than 150 parts by weight. A gas permeability coefficient GPS and a loss tangent tan &#x3b4;S of the rubber composition and a gas permeability coefficient GPL and a loss tangent tan &#x3b4;L of a rubber composition obtained by replacing the filler with kaolin clay having a degree of flatness DL of 20 satisfy (1): GPL/GPS&#x2265;1.02 and (2): |tan &#x3b4;L&#x2212;tan &#x3b4;S|&#x2264;0.03. A tennis ballincludes a coreformed using the rubber composition.

Rubber composition for tennis ball and tennis ball

A rubber composition for a tennis ball includes a base rubber and a high-flatness filler. The high-flatness filler has an average particle diameter Dof not less than 1 &#x3bc;m and not greater than 50 &#x3bc;m. A degree of flatness DL is not less than 40 and not greater than 200. An amount of the high-flatness filler per 100 parts by weight of the base rubber is not less than 5 parts by weight and not greater than 100 parts by weight. A ratio (E2/E1) of a tensile elastic modulus E2 in a tensile strain range from 70% to 100% to a tensile elastic modulus E1 in a tensile strain range from 10% to 30%, of a vulcanized rubber obtained by vulcanizing the rubber composition, is not less than 0.60 and less than 1.00. The tennis ball includes a hollow core formed from the rubber composition.

Rubber composition for tennis ball

A rubber composition for a hollow ball includes a base rubber, an inorganic filler composed of a large number of flat particles, and a carbon-based filler. As to the carbon-based filler, a degree of flatness DLc obtained by dividing an average particle diameter D(&#x3bc;m) by an average thickness Tc (&#x3bc;m) is not less than 50. A weight ratio Mc/Mi is not less than 0.01 and not greater than 1.00. The rubber composition is obtained by a production method including: a first step of mixing the base rubber and the carbon-based filler to obtain a master batch; and a second step of adding the large number of flat particles that form the inorganic filler, to the master batch to orient the large number of flat particles. The hollow ballincludes a coreformed from the rubber composition.

The combustion device includes: a burner; an igniter; a fuel supply unit that supplies fuel to the burner; a blower fan that supplies air for combustion; an exhaust port that discharges combustion exhaust; a device control unit that, before ignition of fuel supplied to the burner by operation of the igniter, performs air purge of the burner at a predetermined air blowing amount by driving the blower fan; and a setting means that is set when a check valve for preventing back flow of exhaust is connected to the exhaust port. When the setting means is set to indicate that the check valve is connected, the device control unit controls the operation of the blower fan so that slow-start air purge is performed in which the time interval from the start of air purge until the predetermined air blowing amount is reached becomes longer, than in the case in which no such check valve is connected.

Combustion device

Water heater

A mold comprises a spherical cavity, a support pin capable of being moved forward and backward with respect to the cavity, and a vent pin (). The vent pin () includes two slits (S), an annular groove () and a vertical groove (). An upper end () of the slit (S) is opened toward the cavity. A lower end () of the slit (S) is opened toward the annular groove (). The annular groove () is coupled to the vertical groove (). The lower end of the vertical groove () is opened toward air. A width (W) of the slit (S) is preferably equal to or greater than 1 &#x3bc;m, is more preferably equal to or greater than 3 &#x3bc;m, and is particularly preferably equal to or greater than 5 &#x3bc;m. A depth (D) of the slit (S) is preferably equal to or greater than 10% of a diameter (&#x3c6;), is more preferably equal to or greater than 15% of the diameter (&#x3c6;), and is particularly preferably equal to or greater than 20% of the diameter (&#x3c6;). It is preferable that the same slit () should be formed on the support pin.

Mold for golf ball

The present invention provides a multi-piece solid golf ball having excellent flight performance and excellent shot feel at the time of hitting, and a method of making the same having good workability. The present invention relates to a multi-piece solid golf ball comprising a core composed of a center and at least one core outer layer formed on the center, and a cover covering the core, wherein the core outer layer is formed from a rubber composition which does not contain zinc salt of unsaturated carboxylic acid.

Method of making a multi-piece solid golf ball

A golf ballhas a core, a cover, a mark layer, and a finishing coat layer. An ink used for the mark layerincludes an isocyanate curing agent that contains a diisocyanate trimer, a base material, and a colorant. Preferred curing agent contains an isophorone diisocyanate trimer. The ink includes a diisocyanate curing agent at equal to or greater than 1% by weight and equal to or less than 20% by weight, calculated on the basis of the solid content. The base material includes a polymer having a hydroxyl group as a principal component. The 'NCO/OH' value, which is a ratio of isocyanate groups of the isocyanate curing agent and hydroxyl groups of the base material, is equal to or greater than 0.5 and equal to or less than 2.0. The mark layermay be printed on a base coat layer, alternatively, may be printed on a crosslinked rubber. This ink has excellent adhesiveness to a base.

Ink for golf ball

A golf ball which is excellent in durability, sufficient to be used in a golf practice range, wherein the golf ball includes a core, a cover covering the core, and a mark printed on the surface of the cover, wherein: the cover is formed from a mixture of an ionomer and an epoxy group-containing polymer and the mark is printed with an ink containing a pigment, an isocyanate compound, and a base resin which is curable with the isocyanate compound.

Golf ball

A golf ball and a method of manufacturing thereof are provided, the golf ball having a core containing a Mg vulcanized rubber powder crosslinked by a magnesium salt of an unsaturated carboxylic acid and another vulcanized rubber powder crosslinked by a co-crosslinking agent other than the magnesium salt of the unsaturated carboxylic acid. Preferably, the ratio &agr;/&bgr; between the content &agr; of the Mg vulcanized rubber powder and the content &bgr; of another vulcanized rubber powder is 1/4 to 4, and the total content &agr;&plus;&bgr; of the vulcanized rubber powders based on 100 parts by mass of a base rubber of the core is 5 to 30 parts by mass.

Golf ball and method of manufacturing thereof

A golf ball printing ink is provided which ensures a sufficient pot life, requires a shortened drying time after printing, and yields a mark having a clear appearance and superior durability. Also provided are a printing method using the ink, a golf ball bearing a mark printed with the ink, and a method of manufacturing a golf ball. The golf ball printing ink includes a solvent, a resin in a solid state at ordinary temperature or a reactive curing resin which is curable through reaction with a curing agent, and an ultraviolet-curing resin. The method of manufacturing a golf ball includes the steps of: printing a mark on a surface of a golf ball body with use of the ink; irradiating the mark with ultraviolet ray after the printing; and applying a clear paint to the golf ball body after the ultraviolet ray irradiation.

Golf ball printing ink, golf ball bearing a mark printed with the ink, and method of manufacturing the golf ball

A method for manufacturing a golf ball in which the eccentricity of an inner core of the golf ball is greatly reduced. The method includes the steps of providing a mold which defines a mold cavity, positioning a vulcanized inner core in the mold cavity so as to define a shell space between the inner core and an inner surface of the mold cavity, introducing an unvulcanized rubber material into the shell space so that a layer of unvulcanized rubber covers the inner core, forming an intermediate product, removing the intermediate product from the mold, placing the intermediate product into a vulcanization mold cavity containing a dimple-forming interior surface and vulcanizing the layer of unvulcanized rubber and forming dimples in the rubber material during vulcanization.

Method for manufacturing golf ball

The present invention relates to a multi-piece solid golf ball comprising a core consisting of an inner core and an outer core formed on the inner core, and one or more layers of cover covering the core, wherein the inner core has a diameter of 34.0 to 37.4 mm and a JIS-C center hardness of 65 to 75, the outer core has a thickness of 0.8 to 2.0 mm and a JIS-C surface hardness of 75 to 85, and the cover has a shore D hardness of 45 to 70, and contains ionomer resin as a base resin.

Multi-piece solid golf ball having good shot feel

Growing community of inventors

Kobe, Japan

Hiroaki Tanaka