Game balls with cover containing post crosslinkable thermoplastic polyurethane and method of making same

   
   

A game ball having a cover formed from a crosslinkable thermoplastic polyurethane is disclosed. Various types of game balls are described, including golf balls and softballs. By selective exposure to radiation, the thermoplastic polyurethane cover is crosslinked and its hardness is increased. Typically, increases in hardness values of at least 2 units on the Shore D scale are realized upon exposure to 3.5 Mrads of gamma radiation.

Una bola del juego que tiene una cubierta formada de un poliuretano termoplástico crosslinkable se divulga. Los varios tipos de bolas del juego se describen, incluyendo pelotas de golf y beísboles con pelota blanda. Por la exposición selectiva a la radiación, la cubierta termoplástica del poliuretano es reticulada y se aumenta su dureza. Típicamente, los aumentos en valores de la dureza por lo menos de 2 unidades en la escala de la orilla D se observan sobre la exposición a 3.5 Mrads de radiación gamma.

 
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