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Toner and method for producing toner

一种生产方法、调色剂的技术，应用在调色剂领域，能够解决不容易获得低温定影性和图像浓度调色剂等问题

Pending Publication Date: 2020-06-16
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As a result, it is not easy to obtain a toner that maintains low-temperature fixability and image density at high levels during long-term use

Method used

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  • Toner and method for producing toner
  • Toner and method for producing toner
  • Toner and method for producing toner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0486] The present invention will now be described in more detail by the following Examples and Comparative Examples, but the present invention is by no means limited to these Examples. Parts used in the examples refer to parts by mass unless otherwise explicitly stated.

[0487] A description will now be given of a production example of the external additive B used in the examples.

[0488]

[0489] As organic-inorganic composite fine particles 1, particles produced in accordance with Working Example 1 of WO 2013 / 063291 were prepared. The physical properties of the organic-inorganic composite fine particles 1 are shown in Table 1.

[0490]

[0491] Silica fine particles 1 to 5 were prepared by surface-treating 100 parts of the base material silica fine particles 1 to 5 with 15 parts of hexamethyldisilazane (HMDS). Physical properties of silica fine particles 1 to 5 are shown in Table 1.

[0492] [Table 1]

[0493] Types of external additives Number average...

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PUM

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Abstract

The present invention relates to a toner and a method for producing the toner. The toner comprising an external additive and a toner particle including a binder resin, a colorant and inorganic fine particles A, wherein the external additive contains an external additive B, a number average particle diameter of primary particles of the external additive B is 30 to 200 nm, an adhesion index of the external additive B to the toner particle is 0.00 to 3.00, a number average particle diameter of primary particles of the inorganic fine particles A is greater than that of the external additive B, andin SEM observations of the toner under specific condition, the number of particles (Na) of the external additive B in a 2 [mu]m square region of the toner surface and the number of particles (Nb) ofthe external additive B observed in a state of overlapping with the inorganic fine particles A in the region satisfy Nb / Na of 0.20 or more.

Description

technical field [0001] The present invention relates to a toner used in an image forming method such as electrophotography, and a method for producing the toner. Background technique [0002] Demands have been made for electrophotographic image forming apparatuses in terms of higher speed, longer life, and lower power consumption, and significant improvements in various properties of toners in response to these demands have been demanded. In particular, for toners, significant improvement in quality stability, ie, long-term durability, has been demanded from the viewpoint of life extension, and significant improvement in low-temperature fixability has been demanded from the viewpoint of increased speed and reduced energy consumption. [0003] Conventionally, from the viewpoint of long-term durability, there has been a method of improving long-term durability by externally adding a large amount of inorganic fine particles. [0004] The toner in the developing device is loade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08G03G9/083G03G9/087G03G9/097
CPCG03G9/0806G03G9/0821G03G9/0819G03G9/083G03G9/09725G03G9/08711G03G9/0825G03G9/09733G03G9/09716G03G9/0833G03G9/0836G03G9/0838G03G9/0815G03G9/08755
Inventor 西川浩司福留航助古井贵昭衣松徹哉
Owner CANON KK