Title:
ROTARY INJECTION MOLDING METHOD MANUFACTURING BALL FOR SPORT AND BALL FOR PLAY OF REINFORCING RUBBER SYSTEM
Document Type and Number:
Japanese Patent JPS5693536
Kind Code:
A
Abstract:
A process is provided for making reinforced rubbery sport and play balls by rotational casting, in a mold lined with a nonwoven fabric, a liquid polymer composition containing an epoxy resin, a liquid carboxyl-terminated polymer, an amine, a dihydric compound, and a plasticizer. The sections of nonwoven fabric in the mold are preshrunk and sealed together by means of an amine-terminated liquid polymer. The resultant sport and play balls have good dimensional stability and the desired flex and tear properties.
Inventors:
UORUTAA TOOMASU MAAFUII
Application Number:
JP17079580A
Publication Date:
July 29, 1981
Filing Date:
December 03, 1980
Export Citation:
Assignee:
GOODRICH CO B F
International Classes:
B29C41/00; A63B41/00; A63B45/00; B29B15/00; B29C31/00; B29C39/00; B29C41/04; B29C41/06; B29C41/34; B29D99/00; (IPC1-7): A63B45/00; B29C5/04; B29H3/00; B29H7/02