Abstract: A resin composition for golf balls includes specific amounts of (A) polyurethane or polyurea and (B) an oxazoline group-containing acrylic polymer or an oxazoline group-containing styrene polymer. A golf ball having a core encased by a cover of one or more layers, wherein at least one cover layer is formed of this resin composition, exhibits a good adhesion between adjoining layers, enabling the ball to achieve a high scuff resistance without lowering the initial velocity of the ball.

Abstract: In a resin composition for golf balls that includes, as a primary ingredient, a polyurethane or polyurea, letting P1 be the absorbance peak height near a wave number of 697 cm?1 and P2 be the absorbance peak height near a wave number of 1512 cm?1 in the infrared absorption spectrum of the composition measured by ATR/FT-IR spectroscopy, the ratio P1/P2 is from 0.03 to 2.10. When used as a cover material in golf balls having a core and a cover of one or more layer, the resin composition keeps the ball from flying too far on approach shots and also gives the ball a good controllability without sacrificing distance on shots with a driver.

Abstract: A resin composition for golf balls is made of (A) polyurethane or polyurea and (B) an acrylic resin or a methacrylic resin, component (B) being included in an amount of from 0.5 to 50 parts by weight per 100 parts by weight of component (A). In a golf ball having a core and a cover of one or more layer encasing the core, at least one cover layer is formed of this resin composition. The resin composition is especially useful as a golf ball cover material because it makes it possible to achieve a higher ball initial velocity on shots with a driver and a lower ball initial velocity on approach shots.

Abstract: A resin composition for golf balls is made of (A) polyurethane or polyurea and (B) a styrene resin material, component (B) being included in an amount of 0.5 to 50 parts by weight per 100 parts by weight of component (A). In a golf ball having a core and a cover of one or more layer encasing the core, at least one cover layer is formed of this resin composition. The resin composition is especially useful as a golf ball cover material because the ball does not fly too far and is easier to control on approach shots, yet does not sacrifice distance on shots with a driver.

Abstract: A resin composition for golf balls includes specific amounts of (A) polyurethane or polyurea and (B) an oxazoline group-containing acrylic polymer or an oxazoline group-containing styrene polymer. A golf ball having a core encased by a cover of one or more layers, wherein at least one cover layer is formed of this resin composition, exhibits a good adhesion between adjoining layers, enabling the ball to achieve a high scuff resistance without lowering the initial velocity of the ball.

Abstract: The invention provides a method of manufacturing a golf ball having a core and a cover of one or more layer over the core, wherein an outermost layer of the cover is molded of a thermoplastic material selected from the group consisting of polyurethane, polyurea and mixtures thereof. The method includes at least the following steps (1) and (2): (1) treating a surface of the cover with an isocyanate compound; and (2) washing off and physically removing excess isocyanate compound by blasting the cover surface with a specific substance at high pressure.

Abstract: The invention provides a method of manufacturing a golf ball having a core and a cover of one or more layer over the core, wherein an outermost layer of the cover is molded of a thermoplastic material selected from the group consisting of polyurethane, polyurea and mixtures thereof. The method includes at least the following steps (1) and (2): (1) treating a surface of the cover with an isocyanate compound; and (2) washing off and physically removing excess isocyanate compound by blasting the cover surface with a specific substance at high pressure.

Abstract: The invention provides a method of manufacturing a golf ball having a core and a cover of one or more layer over the core, wherein an outermost layer of the cover is molded of a thermoplastic material selected from the group consisting of polyurethane, polyurea and mixtures thereof. The method includes at least the following steps (1) and (2): (1) treating a surface of the cover with an isocyanate compound; and (2) washing off and physically removing excess isocyanate compound by blasting the cover surface with a specific substance at high pressure.

Abstract: The invention provides a method of manufacturing a golf ball having a core and a cover of one or more layer over the core, wherein an outermost layer of the cover is molded of a thermoplastic material selected from the group consisting of polyurethane, polyurea and mixtures thereof. The method includes at least the following steps (1) and (2): (1) treating a surface of the cover with an isocyanate compound; and (2) washing off and physically removing excess isocyanate compound by blasting the cover surface with a specific substance at high pressure.

Abstract: A shaped polyamide article, particularly of a fibrous structure or a film, is made of a polyamide containing at least one additive selected from the group consisting of dyes, pigments and modifying additives and specified polyesters derived from an alkylene dicarboxylic acid and diethylene glycol. A process for manufacturing the shaped polyamide article includes the steps of: compounding a molten polyamide with a liquid mixture containing the above defined additive and the above defined polyester as a vehicle; and melt-shaping the resulting compound.

Abstract: A Francis-type runner for pump-turbines comprising a crown ring, a shroud ring and a plurality of runner blades interconnected therebetween, each of said blades satisfying the following relations where 0.09.ltoreq.B/D.ltoreq.0.30:______________________________________ 15.degree. .ltoreq. .theta. .ltoreq. 35.degree. in the case where 10.degree. .ltoreq. .gamma. .ltoreq. 19.degree.; and 20 (.gamma. - 12.3)/9.degree. = .theta. in the case where 19.degree. .ltoreq. .gamma. .ltoreq. 28.degree.; where ______________________________________D = a diameter of a circle circumscribing the outer ends of the respective runner blades;B = a height of the outer end of the runner blade between the crown ring and the shroud ring;.gamma.

Abstract: Multi-component mixed filament, wherein at least two spinning materials having poor affinity are mixed and dispersed in unitary filament in a nebular configuration containing at least 50 stars at least in one portion of the cross-section of the filament and the nebular configuration continues substantially in the longitudinal direction of the filament is manufactured by subjecting said spinning materials to at least eight times of "joining and dividing step in different phase" repeatedly to layer-multiply said spinning materials so as to form a nebular configuration in the cross-section of the resulting filament and then extruding the resulting mixture from orifice in a spinneret. In this manufacture, the preferable combinations of said two spinning materials having poor affinity are polyamide-polyester, polyamide-polyalkylne oxide, polyester-polyalkylene oxide and polyamide-polyolefin.