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US 8,728,696 B2Granted
Toner, image forming method, and process cartridge
AssigneeRicoh Company, Ltd.
InventorsSaori Yamada, Mitsuo Aoki, Hisashi Nakajima, Masashi Nagayama, Shigenori Yaguchi
Life of this patent
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Abstract
A toner including a binder resin, a colorant, and a release agent is provided. The toner has a peak loss tangent (tan δ) value of 3 or more within a temperature range of 80 to 160° C. Here, the loss tangent (tan δ) is a ratio (G″/G′) of a loss elastic modulus (G″) to a storage elastic modulus (G′). The toner provides a good combination of low-temperature fixability, hot offset resistance, storage stability, coloring power and/or opacifying power, and gloss.
Claims16
A toner, comprising:
- a binder resin, wherein the binder resin comprises a crystalline polyester resin;
- a colorant;
- and
- a release agent, wherein the release agent comprises a fatty acid amide,
- wherein the toner has a peak loss tangent (tan δ) value of 3 or more within a temperature range of 80 to 160° C., the loss tangent (tan δ) being a ratio (G″/G′) of a loss elastic modulus (G″) to a storage elastic modulus (G′).
2 more elements
Dependencies are inferred from the claim text.