| US 7,501,459 B2 | ||
| Carbon fiber composite material and method of producing the same | ||
| Toru Noguchi, Ueda (Japan); and Akira Magario, Nagano-ken (Japan) | ||
| Assigned to Nissin Kogyo Co., Ltd., Ueda-Shi (Japan) | ||
| Filed on May 20, 2005, as Appl. No. 11/133,204. | ||
| Claims priority of application No. 2004-151860 (JP), filed on May 21, 2004. | ||
| Prior Publication US 2006/0079627 A1, Apr. 13, 2006 | ||
| Int. Cl. C08J 3/20 (2006.01); C08K 3/04 (2006.01); C08L 9/00 (2006.01) | ||
| U.S. Cl. 523—346 [524/496; 524/574] | 9 Claims |
| 1. A method of producing a carbon fiber composite material, the method comprising:
a first mixing step of mixing an elastomer and carbon nanofibers at a first temperature;
a second mixing step of mixing a mixture obtained by the first mixing step at a second temperature, and
a third mixing step of mixing the carbon fiber composite material obtained by the second mixing step at a third temperature;
wherein:
the first temperature is 50 to 100° C. lower than the second temperature;
the third temperature is lower than the second temperature; and
the third mixing step comprises performing tight milling a plurality of times by using an open roll with a rotor interval
of 0.5 mm or less.
|