Samsung Electronics Co., Ltd.

Hong-chul Shin

Sung-jin Park

Se-young Yoon

Kyeong Pang

Seung-sik Woo

Jong-in Kim

Hae-ree Joo

Jae-hyeuk Jeong

Soon-cheol Jeong

Jung-ik Choi

In-su Lee

Kyung-yoi Yon

Song-won Hyun

Sung-dong Lee

Kyung-yeon Kang

Sang-yup Kim

A toner to develop electrostatic latent images which uses an appropriate combination of a high molecular weight binder resin and a low molecular weight binder resin, an appropriate amount of a releasing agent, and a combination of silica particles and iron oxide particles as external additives, and thus has the following effects: the toner may reduce a generation amount of ultra-fine particles (UFPs) and have enhanced fluidity, charging uniformity, charging stability, transfer efficiency, fixability, durability and a cleaning ability.

Toner to develop electrostatic latent images

A toner to develop electrostatic latent images, which has surface characteristics that may simultaneously improve charge uniformity, charge stability, transferability, and cleaning ability. The toner to develop electrostatic latent images may include core particles comprising a binder resin, a colorant, and a releasing agent; and an external additive including silica particles and titanium dioxide particles, wherein the external additive is attached to external surfaces of the core particles, wherein an iron intensity [Fe], a silicon intensity [Si], and a titanium intensity [Ti] that are measured by X-ray fluorescence (XRF) satisfy both conditions, 0.004&#x2266;[Si]/[Fe]&#x2266;0.009 and 0.8&#x2266;[Ti]/[Fe]&#x2266;2.

Disclosed is a toner for developing an electrostatic charge image, including a toner particle coated with a combination of sol-gel silica particles, hydrophobically surface-treated fumed silica particles, and hydrophobically surface-treated titanium dioxide particles.

Toner for developing electrostatic charge image, and apparatus and method for forming image using the same

A toner including a plurality of fine particles includes a core including first latex particles, a wax and a pigment, or a first latex particle-wax complex and a pigment, and a first shell layer including second latex particles and covering at least a portion of the surface of the core, a method of preparing the toner, a method of forming images using the toner, and an image forming device including a toner transferring unit. The toner can have improved fixing and charging properties, preserving properties at a high temperature and high humidity, glossness and anti-offset properties by reducing a domain size of a wax dispersed in the toner and improving dispersibility of the wax.

Toner, method of preparing the same, method of forming images using the toner and image forming device using the toner

The disclosure provides electrophotographic toner and a method of preparing the same. The toner includes a latex, a colorant, and a releasing agent, wherein the toner has a weight-average molecular weight of about 50,000 to about 80,000; a complex viscosity of about 1&#xd7;10to about 5&#xd7;10(Pa&#xb7;s) at a temperature ranging from about 100&#xb0; C. to about 140&#xb0; C.; and a storage modulus Pa (dG') to a loss modulus Pa (dG&#x2033;) (dG&#x2032;/dG&#x2033;) ratio of about 1.10 to about 1.25.

Electrophotographic toner and method of preparing the same

The disclosure provides an electrophotographic toner and methods for preparing the electrographic toner. The electrographic toner includes a binder, a colorant and a releasing agent, wherein the electrophotographic toner includes strontium (Sr), iron (Fe), titanium (Ti), and silicon (Si) containing particles; wherein, if [Sr], [Fe], [Ti] and [Si] denote the intensities of Sr, Fe, Ti, and Si in the electrophotographic toner, respectively, as measured by X-ray fluorescence spectrometry, then the [Sr]/[Fe] ratio is in the range of about 5.0&#xd7;10to about 4.5, the [Ti]/[Fe] ratio is in the range of about 5.0&#xd7;10to about 8.1&#xd7;10, and the [Si]/[Fe] ratio is in the range of about 2.0&#xd7;10to about 4.0&#xd7;10.

Growing community of inventors

Suwon-si, South Korea

Hong-chul Shin