A flyable object (100,200,300,400,500,600) such as a golf ball, comprising a body (101) and a plurality of structures (102,201) such as dimples or protrusions formed on and/or in the body (101) in a non-periodic manner.

Die vorliegenden Erfindung betrifft eine vulkanisierbare Zusammensetzung, vulkanisierte Erzeugnisse, die daraus hergestellt werden, und deren Verwendung insbesondere in der Herstellung von Golfbällen oder Walzenbeläge.

A golf ball comprising a core (1), intermediate layer (3), and cover (5), wherein the intermediate layer (3) is provided with a plurality of apertures through which the core (1) is exposed, wherein the outer surface of the intermediate layer (3) and the surface of the core (1) exposed through the apertures are on substantially the same spherical surface, and wherein the hardness of the intermediate layer (3) is greater than that of the core (1). The golf ball achieves both a high ball resilience and a soft impact feel.

A golf ball comprising:

• a core comprising a high cis-1,4 content polybutadiene, 20 to 28 parts by weight of a co-crosslinking agent comprised primarily of a zinc salt of an unsaturated acrylate, 3 to 5 parts by weight of a metal oxide activator, an 0.8 to 1.5 parts per hundred resin of a free radical initiator;
• a mantle comprising a terpolymer consisting of 70 to 80% ethylene, 8 to 10.5% acrylic acid and 12 to 20% n-butyl acrylate;
• a cover having an inner cover and an outer cover;
• the inner cover layer comprises a blend of ionomers; and
• the outer layer comprising a thermoplastic polyurethane.

A method for adhering a surface skin of a ball, which uses a means that is free of solvent and involves no solvent, and which is friendly to the environment, creates no odor, poses no danger of fire attributable to catalysts, eliminates the solvent drying time and space that would otherwise be required, and requires no particular skill. In a ball, an adhesive layer 2 is provided on the outer surface of a carcass 1, and a surface skin 3 is placed over the adhesive layer 2; or the adhesive layer 2 is provided on the inner surface of the surface skin 3, and the surface skin 3 is placed over the carcass 1; and adhesion is performed using a means free of solvent. Here, the carcass 1 includes the adhesive layer 2 provided over a tube 1a or includes a reinforcing layer 4 provided over the tube 1a, and the adhesive layer 2 provided over the reinforcing layer 4.

A ball for a ball game of the present invention includes a bladder made of an elastic material having air-impermeability and formed into a hollow spherical shape and into which compressed air is charged; a spherical frame body which accommodates the bladder and has a shape maintenance property and flexibility, and which forms a plurality of spaces; and a plurality of skin panels constituting a surface skin layer arranged such that ends of the skin panels are contacted to one another on the frame body, wherein at least the ends of the plurality of skin panels are adhered to the frame body.

Non-burstable ball for psychomotor exercises relating to sporting, recreational and/or therapeutic activities, the ball being of the pre-inflated or inflatable type and comprising at least a casing made of plastic film of a substantially spherical shape defining an inner chamber (12) filled with air under pressure, at least part of the casing (11) being made of PVC (polyvinyl chloride) with a cellular structure made by means of incorporating microcells (15) of air over at least part of its thickness.

Method to produce non-burstable balls for psychomotor exercises relating to sporting, recreational and/or therapeutic activities, the balls being of the pre-inflated or inflatable type and comprising at least a casing made of plastic film of a substantially spherical shape defining an inner chamber (12) filled with air under pressure, the casing (11) being obtained by mixing basic vinyl resins of the emulsion type, in suspension or in microsuspension, with plasticising and stabilising additives and with expansion agents which have the effect of cellularising the PVC, the mixture being then heated and subjected to shaping and forming.

Non-burstable ball for psychomotor exercises relating to sporting, recreational and/or therapeutic activities, the ball being of the pre-inflated or inflatable type and comprising at least a casing made of plastic film of a substantially spherical shape defining an inner chamber (12) filled with air under pressure, at least part of the casing (11) being made of PVC (polyvinyl chloride) with a cellular structure made by means of incorporating microcells (15) of air over at least part of its thickness.

Method to produce non-burstable balls for psychomotor exercises relating to sporting, recreational and/or therapeutic activities, the balls being of the pre-inflated or inflatable type and comprising at least a casing made of plastic film of a substantially spherical shape defining an inner chamber (12) filled with air under pressure, the casing (11) being obtained by mixing basic vinyl resins of the emulsion type, in suspension or in microsuspension, with plasticising and stabilising additives and with expansion agents which have the effect of cellularising the PVC, the mixture being then heated and subjected to shaping and forming.

The present invention relates to a mold for injection-molding a hemispherical hollow body (1,2) formed of a thermoplastic elastomer, which comprises a first mold (23) having a hemispherical convex, a second mold (24) having a hemispherical concave larger in size than said hemispherical convex, on which second mold (24) is superposed said first mold (23) to form a cavity (25) for said hemispherical hollow body (1,2) a first valve mold (26) removably mounted centrally of the surface of said hemispherical convex of said first mold (23), for forming an outer form of a valve (3) and an inside and small-diameter portion of a valve rubber insertion hole (14), a second valve mold (27) removably mounted centrally of the surface of said hemispherical concave, for forming an intermediate and largediameter portion of said valve rubber insertion hole (14) and an outside and small-diameter portion thereof while forming a cavity (28) for said valve (3) in cooperation with said first mold, and a plurality of gates (31) formed in the periphery of said outside and small-diameter portion of said valve rubber insertion hole (14) associated with said second valve mold (27), for injecting therethrough a plasticized or molten thermoplastic elastomer into said cavities (25, 28).

Disclosed is a method for coating a golf ball, wherein coating efficiency of paint is high and a uniform coating can be formed. According to the method, a paint is sprayed over a golf ball moving with rotation on the circumference of a circle having a diameter of 0.5 to 1.5 m from a disc charged with 60,000 to 130,000 V, which is rotating at 20,000 to 40,000 rpm and is inclined or moving in the vertical direction, or a paint is sprayed in a direction at an angle of 45° or less to the horizontal direction from a disc charged with the above voltage, which is rotating at the above number of revolutions, to coat the golf ball so that a ratio of the maximum film thickness part to the minimum film thickness part may be 1.5 or less after one round coating.

A ball for ball game, comprising a base body composed of two hemispherical hollow bodies formed by injection-molding a thermoplastic elastomer and bonded together to form a spherical hollow body, said base body containing and sealing compressed air injected therein through an air-injection valve provided at an appropriate portion of one of said two hemispherical hollow bodies, and a plurality of leather panels bonded by means of an adhesive to the surface of said base body, wherein a 10 % tensile stress of said thermoplastic elastomer forming said base body ranges from 30 to 190 kg/cm². Various properties of said ball such as shock-absorptivity, shape-maintaining property, impact resilience and the like can be set within appropriate ranges.

Bei diesem Verfahren wird zuerst aus dem zugehörigen Ver­kleidungswerkstoff das Verkleidungshalbprodukt (5) herge­stellt, welches die Form eines Flächengebildes aufweist, das aus zwei Teilflächen in der Gestalt von zwei Achten 1, 2) mit gegeneinander senkrecht orientierten Symmetrie­längsachsen besteht Nach der Beschichtung des Verklei­dungshalbproduktes (5) und/oder des kugelförmigen Körpers 6) mit einem Haftwerkstoff wird der Körper (6) in den Mittelteil des Verkleidungshalbproduktes (5) eingelegt, und durch die Umklappung aller vier Teile des Verklei­dungshalbproduktes (5) über den Körper (6) wird dieser Körper (6) völlig in der Verkleidung eingeschlossen. Die erfindungsgemäße Einrichtung ist so ausgebildet, daß sie Segmentformen aufweist, von denen jede durch einen festen Teil (7) gebildet ist, auf welchem zwei Segmentpaare (8, 8, 9, 9) drehbar gelagert sind, welche gemeinsam mit dem Hohlraum des festen Teiles (7) die zu verkleidende Kugel­fläche einschließen. Die Kippbewegung der Segmente (8, 8, 9, 9) ist auf einer Viertelkreisbogenbahn in Richtung des Pfeils (11) über Zugstangen (10) von geradlinigen Motoren vorgesehen.