Samsung Electronics Co., Ltd.

Hp Printing Korea Co., Ltd.

Mi-rim Cho

Kyeong Pang

Jae-Hwan Kim

Su-bum Park

Jin-mo Hong

Jeong-hyun Lee

Yo-da Shin

Jeong-Hyun Lee

Jin-Mo Hong

An electrophotographic toner including a binder, a colorant and a releasing agent, and a method of preparing the electrophotographic toner.

Electrophotographic toner and method of preparing the same

The disclosure provides an electrographic toner having a core layer, which includes a binder, a colorant and two or more types of releasing agents, and a shell layer covering the core layer, and a method of preparing the same.

Electrographic toner and method of preparing the same

Toner for developing an electrostatic image, which satisfies charging stability, low-temperature fixability, high-temperature storage characteristics, and durability with respect to an environment up to a predetermined level or above, and a method of preparing the toner. The toner includes: a core layer including a first binder resin, a colorant, and a releasing agent; and a shell layer covering the core layer and including a second binder resin, wherein the first binder resin includes about 70 wt % or above of amorphous polyester resin and about 30 wt % or below of crystalline polyester resin, the second binder resin includes an amorphous polyester resin, and a melting temperature (Tm(C)) of the crystalline polyester resin, a melting temperature (Tm(W)) of the releasing agent, and a melting point (Tm(T)) of the toner satisfy the following conditions: &#x2212;20&#xb0; C.&#x2266;Tm(W)&#x2212;Tm(C)&#x2266;20&#xb0; C.; and 0&#xb0; C.&#x3c;Tm(C)&#x2212;Tm(T)&#x2266;10&#xb0; C.

Toner for developing electrostatic image and method of preparing the same

The present disclosure provides an electrographic toner and methods for preparing an electrographic toner. In particular, the present disclosure provides an electrophotographic toner comprising a latex, a colorant and a releasing agent. The electrophotographic toner may further comprise zinc (Zn), iron (Fe), and silicon (Si). The [Zn]/[Fe] ratio may be in the range of about 5.0&#xd7;10to about 2.0. The [Si]/[Fe] ratio may be in the range of about 5.0&#xd7;10to about 5.0&#xd7;10. [Zn], [Fe] and [Si] denote the intensities of Zn, Fe and Si, respectively, as measured by X-ray fluorescence spectrometry.

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Seoul, South Korea

Mi-rim Cho