Long life, low air permeable pressurized articles such as play b

Details Long life, low air permeable pressurized articles such as play b Long life, low air permeable pressurized articles such as play b

1995-05-10

1997-01-14

Wong, Steven B.

Games using tangible projectile

Projectile, per se; part thereof or accessory therefor

Having hollow core or bladder enclosed within cover

524908, A63B 4100

Patent

active

055931570

ABSTRACT:
Low air permeable, pressurized articles such as play balls, e.g., a tennis ball, have a thin barrier layer formed on the vulcanized rubber core. The barrier layer is chemically bonded to the internal and/or external surface of the core, e.g., by the reaction of a Lewis acid, e.g., sulfur trioxide, with the core rubber. The thin barrier layer permits the tennis ball to be flexible and have good rebound life and yet extends the play life thereof before ball rebound or softness changes to undesired levels.

REFERENCES:
patent: 4098504 (1978-07-01), Koziol et al.
patent: 4955613 (1990-09-01), Gendreau et al.
patent: 5286532 (1994-02-01), Yoshikawa et al.
An article entitled "Improvement in Barrier Properties of Polymers via Sulfonation and Reductive Metallization," by Walles, W. E, Barrier Polymers and Barrier Structures; Koros, W. J. ed; American Chemical Society; Washington, D.C. 1990, chapter 14.

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