Claims
- 1. A method of manufacturing a golf ball cover material composition by kneading an ionomer resin and a diene rubber together to disperse the diene rubber in the ionomer resin, comprising sprinkling the surface of pellets of a diene rubber with an ionomer resin powder, mixing the pellets of the diene rubber whose surface is sprinkled with the ionomer resin powder with pellets of the ionomer resin, and then kneading the resultant mixture at a temperature at which the diene rubber is crosslinked.
- 2. The method according to claim 1, wherein said pellets of the diene rubber whose surface is sprinkled with the ionomer resin powder is constituted by mixing one part by weight or more of the ionomer resin powder with one part by weight of the pelletized diene rubber.
- 3. The method according to claim 1, wherein said kneading at the crosslinking temperature is performed by the twin-screw extruder at the temperature of 150° C. or more and less than 260° C.
- 4. The method according to claim 1, wherein Shore D hardness of said ionomer resin is equal to or more than 55 and less than 80.
- 5. A method of manufacturing a golf ball cover material composition by kneading an ionomer resin and a diene rubber together to disperse the diene rubber in the ionomer resin comprising forming pellets of a mixture of an ionomer resin powder and a diene rubber, mixing the pellets of the mixture of the ionomer resin powder and the diene rubber with pellets of the ionomer resin, and then kneading the resultant mixture at a temperature at which the diene rubber is crosslinked.
- 6. The method according to claim 5, wherein said kneading at the crosslinking temperature is performed using a twin-screw extruder at the temperature of 150° C. or more and less than 260° C.
- 7. The method according to claim 5, wherein Shore ‘D’hardness of said ionomer resin is equal to or more than 55 and less than 80.
Priority Claims (7)
Number |
Date |
Country |
Kind |
9-223321 |
Aug 1997 |
JP |
|
9-239591 |
Sep 1997 |
JP |
|
9-270955 |
Oct 1997 |
JP |
|
9-291091 |
Oct 1997 |
JP |
|
9-303979 |
Nov 1997 |
JP |
|
10-169705 |
Jun 1998 |
JP |
|
10-196998 |
Jul 1998 |
JP |
|
RELATED APPLICATIONS
This is a division of application Ser. No. 09/352,347 now U.S. Pat. No. 6,290,613, filed Jul. 13, 1999 which is a C-I-P of application Ser. No. 09/135,595, filed Aug. 18, 1998 (now abandoned), all of which is incorporated herein by reference.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
5776012 |
Moriyama |
Jul 1998 |
A |
5833553 |
Sullivan et al. |
Nov 1998 |
A |
5971870 |
Sullivan et al. |
Oct 1999 |
A |
5993332 |
Yamagishi et al. |
Nov 1999 |
A |
6096830 |
Takemura |
Aug 2000 |
A |
Non-Patent Literature Citations (1)
Entry |
TAD MOR “Principles of Polymer Processing”, p. 438, 1979. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/135595 |
Aug 1998 |
US |
Child |
09/352347 |
|
US |