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Nonmagnetic toner

一种调色剂、非磁性的技术，应用在显影剂、仪器、光学等方向，能够解决不利熔融粘附构件污染、不能改进定影特性、难以实现调色剂低温定影性相容性等问题，达到转印性能优良、摩擦带电特性的变化小、高品质图像的效果

Active Publication Date: 2010-06-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, when the developing characteristics are prioritized over the fixing characteristics, the fixing characteristics may not be improved
Although the reduction of the average particle diameter of the toner is indeed an effective means especially from the viewpoint of improving the sharpness and quality of the image as described above, this means disadvantageously promotes an Contamination of members due to exudation, thereby making it particularly difficult to achieve compatibility between low-temperature fixability and developing characteristics of toner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0358] (Preparation of aqueous dispersion medium)

[0359] 350 parts of water

[0360] Tricalcium Phosphate 3 parts

[0361] While maintaining the temperature of the mixture of the above-mentioned components at 60° C., the mixture was stirred at a speed of 12,000 rpm with a high-speed stirring device TK-homogenizer, thereby preparing an aqueous dispersion medium.

[0362] (Preparation of Polymerizable Monomer Composition 1)

[0363] Styrene 65 parts

[0364] C.I. Pigment Blue 15:3 5 parts

[0365] Negative charge control agent (3,5-di-tert-butyl aluminum salicylate compound) 1 part

[0366] A monomer mixture 1 was prepared by dispersing the above formulation at room temperature for 5 hours with a fine grinder.

[0367] Subsequently, the monomer mixture 1 was added into a stirring tank capable of controlling the temperature, and its temperature was raised to 60°C.

[0368] Next, 10 parts of Fischer-Tropsch wax (having the highest endothermic peak at 75° C.) was added to t...

Embodiment 2

[0454] Cyan toner No. 2 was obtained in the same manner as in Example 1 except that the amount of polar resin used was changed to 40 parts. Table 1 shows the physical properties of the toner, and Table 2 shows the evaluation results.

Embodiment 3

[0456] Cyan toner No. 3 was obtained in the same manner as in Example 1 except that the polar resin usage amount was changed to 10 parts. Table 1 shows the physical properties of the toner, and Table 2 shows the evaluation results.

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PUM

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Abstract

A nonmagnetic toner which comprises toner particles comprising a binder resin, a colorant, and a wax ingredient and an inorganic fine powder, characterized in that 1) when a temperature at which the value of loss tangent (tand), which is the ratio between the storage elastic modulus (G') and loss elastic modulus (G') of the toner, is maximum in the temperature range of 50-80 DEG C is expressed by T1, then the value of storage elastic modulus of the toner at the temperature (T1), G'(T1), satisfies the relationship 5.00OE07=G'(T1)=1.00OE09 (dN / m2), 2) in the temperature range of 50-80 DEG C, the value of loss tangent (tand), which is the ratio between the storage elastic modulus (G') and loss elastic modulus (G') of the toner, is in the range of 0.80-2.00 at the consecutive temperatures in a range which is not narrower than 15 DEG C, and 3) in the temperature range of 120-160 DEG C, the value of loss tangent (tand), which is the ratio between the storage elastic modulus (G') and loss elastic modulus (G') of the toner, is 1.00 or higher.

Description

technical field [0001] The present invention relates to a non-magnetic toner used in a recording method using an electrophotography method, an electrostatic recording method, a toner jet method, or the like. Background technique [0002] In recent years, there has been a strong demand for electrophotographic devices such as printer devices to print at increased speeds and operate at reduced costs while achieving improvements in image clarity and quality, and energy savings to a greater extent than conventional electrophotographic devices . [0003] Along with such requirements, the characteristics required of toners have become more complex and cover a wider range. Therefore, attempts based on various viewpoints have been made regarding toner development. [0004] From the standpoint of improving image definition and quality, along with the increase in the resolution of image forming machines to, for example, 1,200 or 2,400 dpi, there is a need to reduce the particle size ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G9/087G03G9/097
CPCG03G9/0806G03G9/09392G03G9/09708G03G9/0819G03G9/0815G03G9/08795G03G9/09385G03G9/08797G03G9/09733G03G9/08791G03G9/0827G03G9/09357
Inventor 吉崎和已稻叶功二胜田恭史
Owner CANON KK
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