Minolta Company, Ltd.

Megumi Aoki

Masayuki Hagi

Takeshi Arai

Junichi Tamaoki

Yoshihiro Mikuriya

Yoshitaka Sekiguchi

Tetsuo Sano

Kenichi Kido

Masahide Inoue

Masahiro Anno

Chikara Tsutsui

Hiroaki Kato

The present invention relates to a toner for developing an electrostatic latent image comprising a binder resin, a colorant, a first wax, and a second wax whose kind is different from that of the first wax, wherein the toner is prepared by a kneading-grinding method and integrated domains of the first wax and the second wax are dispersed in the binder resin.

Toner for developing electrostatic latent image

Negatively chargeable toner and image-forming method

Color toner for developing electrostatic image comprising two kinds of polyesters and two kinds of releasing agents

Color toner for developing electrostatic image, comprising first linear polyester and second non-linear polyester as binder resin

The present invention provides a color toner for developing an electrostatic image having excellent light transmission for OHP and fixing efficiency, said color toner effectively preventing a low temperature offset and a high temperature offset when it is applied to a fixing device whose coating weight of an oil is reduced. The color toner is characterized in that (i) it comprises a binding resin and a colorant, (ii) its storage elastic modulus at 90&deg; C. (G&prime; ) is not more than 6&times;10 Pa, (iii) its storage elastic modulus at 140&deg; C. (G&prime; ) is not less than 5&times;10 Pa, (iv) a temperature showing a maximum value of &dgr; in tan&dgr;&equals;G&Prime;/G&prime; (wherein G&prime; is a storage elastic modulus of the color toner, and G&Prime; is a loss elastic modulus of the color toner) exists in the range of 90-120&deg; C., and (v) the maximum value of &dgr; is not less than 60&deg;.

Color toner for developing an electrostatic image

The present invention relates to a toner that contains at least a binder resin and a colorant, characterized in that the toner has a temperature range of 90 to 110&deg; C. at 2&times;10 (Pa) of a storage elastic modulus (G&prime;) under 0.1 (Hz) of a frequency.

Toner used for developing electrostatic latent image

Electrostatic-latent-image developing toner and inorganic particles used for such a toner

The present invention provides a toner for developing an electrostatic latent image which suppresses an adhesion and wearability on a surface of a photosensitive member and exhibits an excellent rising property of an electrification. The toner comprises (i) toner particles containing a binder resin and a colorant, (ii) a first external additive consisting of first inorganic particles whose number-average particle size is 5-40 nm, (iii) a second external additive consisting of second inorganic particles whose number-average particle size, which is larger than that of the first external additive, is 20-160 nm, (iv) a third external additive consisting of third inorganic particles whose number-average particle size, which is larger than that of the second external additive, is 80-1200 nm, and (v) a fourth external additive consisting of a metal salt of fatty acid whose volume-average particle size is 1.5-12 &mgr;m, said four external additives being externally added to the toner particles.

Toner for developing an electrostatic latent image

Toner for an electrostatic latent image development

The present invention relates to a toner comprising toner particles and an external additive comprising strontium titanate particles that have a number-average particle size of 80 to 800 nm and do not have a peak of strontium carbonate in qualitative analysis by X-ray diffraction.

The present invention relates to a toner comprising:

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Itami, Japan

Megumi Aoki