| US 7,556,906 B2 | ||
| Toner, and image forming method, image forming apparatus, and process cartridge using the toner | ||
| Hiroaki Katoh, Nagaokakyo (Japan); Masayuki Hagi, Minoo (Japan); Takuya Kadota, Kobe (Japan); Yoshihiro Mikuriya, Nishinomiya (Japan); Katsunori Kurose, Takarazuka (Japan); Atsushi Yamamoto, Kawanishi (Japan); Masahide Inoue, Katsuragi (Japan); Minoru Nakamura, Takarazuka (Japan); Chiyoshi Nozaki, Otsu (Japan); Tsuyoshi Nozaki, Ikeda (Japan); and Hideaki Yasunaga, Ibaraki (Japan) | ||
| Assigned to Ricoh Company Limited, Tokyo (Japan) | ||
| Filed on Nov. 28, 2006, as Appl. No. 11/563,697. | ||
| Claims priority of application No. 2005-344838 (JP), filed on Nov. 30, 2005; and application No. 2005-346392 (JP), filed on Nov. 30, 2005. | ||
| Prior Publication US 2007/0122729 A1, May 31, 2007 | ||
| Int. Cl. G03G 9/08 (2006.01) | ||
| U.S. Cl. 430—108.8 [430/109.4; 430/124.1; 430/137.14; 399/159] | 19 Claims |
| 1. A toner, comprising:
a colorant;
a resin composition (A) comprising at least one binder resin and a hydrocarbon wax having a melting point of 70-90° C. in
an amount of from 6 to 30% by weight based on total weight of resin composition (A), and having a softening point (T1/2(A)) of from 120 to 150° C.; and
a resin composition (B) having a softening point (T1/2(B)) of from 100 to 130 C.,
wherein a weight ratio ((A)/(B)) of the resin composition (A) to the resin composition (B) is from 10/90 to 45/55, and
wherein the following relationship is satisfied:
T1/2(A)≧T1/2(B)+3
and wherein the toner has a flow-end temperature (Tend) of not less than 140° C.
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