Toner to develop electrostatic charge image, device to supply the same, and apparatus and method of forming image using the same

摘要

A toner to develop an electrostatic charge image, a toner supply device employing the toner, an apparatus to form an image employing the toner, and a method of forming an image using the toner are provided. The toner includes at least a binder resin, a colorant, and a releasing agent. By using the binder resin including a combination of a reduced molar weight binder resin, an increased molar weight binder resin, and the releasing agent having an effecdtive compatibility with the binder resin together, the toner has accurately-controlled dynamic viscoelastic properties represented by a loss tangent. The toner to develop an electrostatic charge image according to an embodiment has development stability, development lifetime, fixability, charging stability, gloss, an anti-offset property, and heat storage ability at predetermined levels or higher.

主权项

1. A toner to develop an electrostatic charge image, the toner comprising at least a binder resin, a colorant, and a releasing agent,
wherein the binder resin comprises at least two kinds of binder resin having different weight average molecular weights, wherein a peak temperature of a loss tangent (tan δ) of the toner is equal to or greater than 64° C. and less than 70° C. and an average value of the loss tangent (tan δ) at a temperature ranging from 100° C. to 120° C. of the toner is equal to or greater than about 1.5 and equal to or less than about 2.0 in a dynamic viscoelasticity measurement conducted as a function of temperature under a condition of a measurement frequency of 6.28 rad/s, a heating rate of 2.0° C./min, and an initial strain of 0.3%, where tan δ is a tangent of a phase angle δ between deformation and response when stress or strain is applied to the toner.