FR2459058A1 - Leather medicine ball with plastic filling - has desired appearance and handling, correct weight and pressure can be adjusted - Google Patents

Leather medicine ball with plastic filling - has desired appearance and handling, correct weight and pressure can be adjusted Download PDF

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Publication number
FR2459058A1
FR2459058A1 FR7915831A FR7915831A FR2459058A1 FR 2459058 A1 FR2459058 A1 FR 2459058A1 FR 7915831 A FR7915831 A FR 7915831A FR 7915831 A FR7915831 A FR 7915831A FR 2459058 A1 FR2459058 A1 FR 2459058A1
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FR
France
Prior art keywords
hardness
shore
resin
medicine ball
resins
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7915831A
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French (fr)
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SOTRAC TRANSFORMATION CAOUTCHO
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SOTRAC TRANSFORMATION CAOUTCHO
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Filing date
Publication date
Application filed by SOTRAC TRANSFORMATION CAOUTCHO filed Critical SOTRAC TRANSFORMATION CAOUTCHO
Priority to FR7915831A priority Critical patent/FR2459058A1/en
Publication of FR2459058A1 publication Critical patent/FR2459058A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B65/00—Implements for throwing  ; Mechanical projectors, e.g. using spring force
    • A63B65/06—Heavy throwing-balls, i.e. "medicine balls", shots, weights or stones for putting
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B41/00—Hollow inflatable balls
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B37/00—Solid balls; Rigid hollow balls; Marbles
    • A63B37/02—Special cores
    • A63B37/06—Elastic cores
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B45/00—Apparatus or methods for manufacturing balls

Abstract

A filling consisting of dispersions of solid vinyl resins, esp. based on PVC, in liquid plasticisers, gives a medicine ball, the outside of which comprises panels of natural leather fixed by a polyurethane adhesive, its flexibility, resistance to compression, and desired weight. The viscosity of the filling is between 60 and 130 calculated according to ISO/R norms and the Shore A hardness is between 50 and 80. The weight ratio plasticiseer/resin varies according to the Shore A hardness and the resins are stabilised as regards heat and light. An inflating valve buried in the filling allows the regulation of the internal pressure. Deep grooves between the panels make the ball adaptable to any user.

Description

Les médecine-balls actuellement sur le marché sont de deux types : le premier est constitué d'un matériau thermoplastique chargé par exemple d'une ou de deux couches de chlorure de polyvinyle, alors que le second est constitué d'une enveloppe formée de préférence de panneaux de cuir cousus, qui lui donne l'aspect et le toucher voulus, et d'une charge par exemple en chiffons ou en tissus qui détermine son poids. The medicine balls currently on the market are of two types: the first consists of a thermoplastic material loaded for example with one or two layers of polyvinyl chloride, while the second consists of an envelope preferably formed sewn leather panels, which give it the desired look and feel, and a load, for example, of rags or fabrics which determines its weight.

L'invention concerne uniquement un médecine-ball du second type. The invention relates only to a medicine ball of the second type.

Un médecine-ball suivant l'invention comprend, de façon connue, une enveloppe, faite de panneaux de cuir naturel préalablement découpés et traités de façon classique, qui lui donne l'aspect et le toucher voulus et qui est fixée, par une colle à base de polyuréthane, à une charge qui donne au ballon la souplesse, l'étanchéité à la pression et le poids voulu.Ce médecine-ball est caractérisé en ce que : a) cette charge est constituée par des plastisols, c'est-à-dire des dispersions de résines vinyliques solides, de préférence à base de chlorure de polyvinyle, dans des plastifiants liquides, dans lesquels la valeur de l'indice de viscosité, utilisée comme caractéristique principale de la résine, est calculée suivant la norme ISO/R.174 et est comprise entre 60 et 130, et dont la dureté Shore A est comprise entre 50 et 80, le rapport pondéral plastifiant/résine étant voisin de 110 pour une dureté Shore A de 50, de 80 pour une dureté Shore A de 65, et de 55 pour une dureté Shore A de 80; b) les résines sont stabilisées par rapport à la chaleur et à la lumière (rayonnements ultra-violets) par chauffage après adjonction au mélange chlorure de polyvinyle/plastifiant d'associations de dérivés métalliques et de dérivés époxydiques qui réagissent avec l'acide chlorhydrique dégagé lors de l'augmentation de la température, ce qui provoque la gélification de la résine puis la fusion de celle-ci, avec pour résultat la solvatation la plus complète de la résine, à une température comprise dans la plupart des cas entre 180 et 1900 C, le système de stabilisation étant adapté à chaque type de résine et aux conditions d'utilisation du matériau avec l'appareillage qui assure la fusion. A medicine ball according to the invention comprises, in known manner, an envelope, made of natural leather panels previously cut and treated in a conventional manner, which gives it the desired appearance and touch and which is fixed, with a glue to polyurethane base, at a load which gives the ball flexibility, tightness at pressure and the desired weight. This medicine ball is characterized in that: a) this load consists of plastisols, i.e. -display dispersions of solid vinyl resins, preferably based on polyvinyl chloride, in liquid plasticizers, in which the value of the viscosity index, used as the main characteristic of the resin, is calculated according to ISO / R standard .174 and is between 60 and 130, and whose Shore A hardness is between 50 and 80, the plasticizer / resin weight ratio being close to 110 for a Shore A hardness of 50, of 80 for a Shore A hardness of 65 , and 55 for a Shore A hardness of 80; b) the resins are stabilized with respect to heat and light (ultraviolet radiation) by heating after addition to the polyvinyl chloride / plasticizer mixture of combinations of metal derivatives and epoxy derivatives which react with the hydrochloric acid released during the increase in temperature, which causes the gelation of the resin and then the melting thereof, resulting in the most complete solvation of the resin, at a temperature in most cases between 180 and 1900 C, the stabilization system being adapted to each type of resin and to the conditions of use of the material with the apparatus which ensures the fusion.

Les plastisols utilisés sont rotomoulés en une seule opération et gardent une souplesse constante lors de l'utilisation des médecine-balls, c'est-à-dire lorsque la température ambiante se situe dans une fourchette de 10 à 30 C, ce qui correspond à la température des salles d'entrainement. The plastisols used are rotomolded in a single operation and keep a constant flexibility when using the medicine balls, that is to say when the ambient temperature is within a range of 10 to 30 C, which corresponds to the temperature of the training rooms.

Enfin, pour améliorer au maximum la prise en main afin d'adapter le médecine-ball suivant l'invention à chaque utilisateur, les panneaux de cuir du revêtement sont séparés par des gorges profondes, et l'adjonction d'une valve de gonflage noyée dans la charge permet de régler la pression interne de 0 à 0,1 bar et donc de régler la souplesse du ballon. Finally, to improve the grip as much as possible in order to adapt the medicine ball according to the invention to each user, the leather panels of the covering are separated by deep grooves, and the addition of a flooded inflation valve in the load adjusts the internal pressure from 0 to 0.1 bar and therefore adjusts the flexibility of the tank.

Claims (2)

REVENDICATIONS 1 - Médecine-ball comprenant une enveloppe, faite de panneaux de cuir naturel préalablement découpés et traités de façon classique, qui lui donne l'aspect et le toucher voulus et qui est fixée, par une colle à base de polyuréthane, à une charge qui donne au ballon la souplesse, l'étanchéité à la pression et le poids voulus, et caractérisé en ce que a) la charge est constituée par des plastisols, c'est-à-dire des dispersions de résines vinyliques solides, de préférence à base de chlorure de polyvinyle, dans des plastifiants liquides, dans lesquels la valeur de la viscosité, utilisée comme caractéristique principale de la résine, est calculée suivant la norme ISO/R 174 et est comprise entre 60 et 130, et dont la dureté Shore A est comprise entre 50 et 80, le rapport pondéral plastifiant/résine étant voisin de 110 pour une dureté Shore A de 50, de 80 pour une dureté Shore A de 65, et de 55 pour une dureté Shore A de 80, et les résines sont stabilisées par rapport à la chaleur et à la lumière ; b) une valve de gonflage noyée dans la charge permet de régler la pression interne à une valeur comprise entre 0 etO,l bar afin de régler la souplesse du ballon. 1 - Medicine ball comprising an envelope, made of natural leather panels previously cut and treated in a conventional manner, which gives it the desired appearance and feel and which is fixed, with a polyurethane-based adhesive, to a load which gives the balloon flexibility, tightness at pressure and the desired weight, and characterized in that a) the filler is constituted by plastisols, that is to say dispersions of solid vinyl resins, preferably based polyvinyl chloride, in liquid plasticizers, in which the viscosity value, used as the main characteristic of the resin, is calculated according to ISO / R 174 and is between 60 and 130, and whose Shore A hardness is between 50 and 80, the plasticizer / resin weight ratio being close to 110 for a Shore A hardness of 50, 80 for a Shore A hardness of 65, and 55 for a Shore A hardness of 80, and the resins are stabilized with respect to heat and lumi time ; b) an inflation valve embedded in the load allows the internal pressure to be adjusted to a value between 0 and 0.1 bar in order to adjust the flexibility of the balloon. 2 - Procédé pour la fabrication d'un médecine-ball suivant la revendication 1, caractérisé en ce que : a) les résines du plastisol sont stabilisées par chauffage après adjonction au mélange chlorure de polyvinyle/plastifiant d'associations connues de dérivés métalliques et de dérivés époxydiques qui réagissent avec l'acide chlorhydrique dégagé lors de l'augmentation de la température, ce qui provoque la gélification de la résine puis la fusion de celle-ci,avec pour résultat la solvation la plus complète de la résine, à une température comprise dans la plupart des cas entre 180 et 1900, le système de stabilisation étant adapté à chaque type de résine utilisé et aux conditions d'utilisation du matériau avec l'appareillage qui assure la fusion ; b) la charge dans laquelle est noyée la valve de gonflage est réalisée par une seule opération de rotomoulage.  2 - Process for the manufacture of a medicine ball according to claim 1, characterized in that: a) the plastisol resins are stabilized by heating after addition to the polyvinyl chloride / plasticizer mixture of known associations of metal derivatives and epoxy derivatives which react with the hydrochloric acid released when the temperature increases, which causes the resin to gel and then melt, resulting in the most complete solvation of the resin at a temperature in most cases between 180 and 1900, the stabilization system being adapted to each type of resin used and to the conditions of use of the material with the apparatus which ensures the fusion; b) the charge in which the inflation valve is embedded is produced by a single rotational molding operation.
FR7915831A 1979-06-20 1979-06-20 Leather medicine ball with plastic filling - has desired appearance and handling, correct weight and pressure can be adjusted Withdrawn FR2459058A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7915831A FR2459058A1 (en) 1979-06-20 1979-06-20 Leather medicine ball with plastic filling - has desired appearance and handling, correct weight and pressure can be adjusted

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7915831A FR2459058A1 (en) 1979-06-20 1979-06-20 Leather medicine ball with plastic filling - has desired appearance and handling, correct weight and pressure can be adjusted

Publications (1)

Publication Number Publication Date
FR2459058A1 true FR2459058A1 (en) 1981-01-09

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Family Applications (1)

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FR7915831A Withdrawn FR2459058A1 (en) 1979-06-20 1979-06-20 Leather medicine ball with plastic filling - has desired appearance and handling, correct weight and pressure can be adjusted

Country Status (1)

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FR (1) FR2459058A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484397A (en) * 1948-01-30 1949-10-11 Us Rubber Co Practice golf ball
GB739239A (en) * 1953-02-26 1955-10-26 Us Rubber Co Improvements in practice or play ball and method of making same
GB746933A (en) * 1953-10-23 1956-03-21 Us Rubber Co Improvements in practice or play balls
US2815211A (en) * 1955-11-04 1957-12-03 Anthony B Grandinette Athletic training ball
FR2375017A2 (en) * 1976-05-25 1978-07-21 Delacoste & Cie THERMOPLASTIC MATERIAL BALLOON
US4149720A (en) * 1975-10-22 1979-04-17 Lannom Manufacturing Company, Inc. Ball and method of making same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484397A (en) * 1948-01-30 1949-10-11 Us Rubber Co Practice golf ball
GB739239A (en) * 1953-02-26 1955-10-26 Us Rubber Co Improvements in practice or play ball and method of making same
GB746933A (en) * 1953-10-23 1956-03-21 Us Rubber Co Improvements in practice or play balls
US2815211A (en) * 1955-11-04 1957-12-03 Anthony B Grandinette Athletic training ball
US4149720A (en) * 1975-10-22 1979-04-17 Lannom Manufacturing Company, Inc. Ball and method of making same
FR2375017A2 (en) * 1976-05-25 1978-07-21 Delacoste & Cie THERMOPLASTIC MATERIAL BALLOON

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