Toner for electrostatic image development, toner cartridge, process cartridge and image forming apparatus

A technology for developing toner and electrostatic images, which is applied to the equipment of the electric recording process using the charge pattern, the electric recording process using the charge pattern, and the developer, etc., which can solve the problem of increasing the non-static adhesion tendency of the toner and increasing the area and other problems, to achieve the effect of reliable blockage, inhibition of adhesion, and inhibition of cracks

Active Publication Date: 2010-09-29
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally, when the toner is subjected to stress in a developing machine, etc., the external additive attached to the surface of the toner is freed or embedded, thereby resulting in an increase in the area where the external additive does not exist on the surface of the toner particle, resulting in a toner particle. Non-static adhesion of toner tends to increase

Method used

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  • Toner for electrostatic image development, toner cartridge, process cartridge and image forming apparatus
  • Toner for electrostatic image development, toner cartridge, process cartridge and image forming apparatus
  • Toner for electrostatic image development, toner cartridge, process cartridge and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0287]

[0288] 100 parts by weight of the toner particles (1) obtained above, 1.5 parts by weight of HMDS (hexamethyldisilazane)-treated hydrophobic silica particles (primary particle diameter: 0.012 μm) and 1 part by weight of the above The obtained specific external additive particles (1) were charged into a 5 L Henschel mixer having a jacket allowing cooling water to flow therein, and were stirred using a stirring blade rotating at a peripheral speed of 28 m / s The mixture was mixed for 20 minutes at 100°C, and then coarse particles were removed by passing through a sieve having a mesh opening of 45 μm, whereby Toner (1) was obtained. The number-average number of specific external additive particles (1) attached to one particle of the toner (1) was 95.

[0289] 10 parts by weight of the obtained toner was mixed with 100 parts by weight of a carrier for Apeos Port-II C7500 manufactured by Fuji Xerox Co., Ltd. to prepare a developer, and the developer was disposed in an ima...

Embodiment 2～10

[0291]

[0292] Toners (2) to (10) were obtained in the same manner as the preparation of toner (1) except that the toner particles, specific external additive particles and other ingredients were combined as shown in Table 1 . The number average number of specific external additive particles attached to one particle of each toner is: 7 in Example 2, 350 in Example 3, 6 in Example 4, 4 in Example 5, In Example 6, it was 400, in Example 7, it was 1.5, in Example 8, it was 280, in Example 9, it was 71, and in Example 10, it was 87.

[0293] When each of these toners was configured in an image forming apparatus in the same manner as in Example 1 and evaluated, redispersion of the specific external additive particles to the primary particles was hardly observed. At this time, the redispersion rate was 2 number % in Example 2, 5 number % in Example 3, 0 number % in Example 4, 12 number % in Example 5, and 12 number % in Example 6. 7 number % in Example 7, 10 number % in Example...

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Abstract

The invention provides a toner for electrostatic image development, a toner cartridge, a process cartridge and an image forming apparatus. The toner for electrostatic image development contains a toner particle and external additive particles adhered to the surface of the toner particle, each of the external additive particles being constituted of plural irreversibly coalesced primary particles.

Description

technical field [0001] The present invention relates to a toner for electrostatic image development, a toner cartridge, a process cartridge and an image forming apparatus. Background technique [0002] An image forming apparatus of a so-called electrostatic printing method is equipped with an image holding body (hereinafter sometimes referred to as a "photoreceptor"), a charging device, an exposure device, a developing device, a transfer device, and a fixing device, and forms an image using these devices by electrophotography . In recent years, xerographic image forming equipment has achieved higher speed, higher image quality, and longer life through technical development of each component and system. [0003] In order to realize high image quality, it is necessary to faithfully produce an image using a fine latent image formed in an optical system, and in order to improve the faithful reproducibility of the fine latent image, attempts have been made to reduce the diameter...

Claims

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Application Information

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IPC IPC(8): G03G9/097G03G15/08G03G21/18G03G15/00
CPCG03G9/09708G03G9/09716G03G21/10G03G9/09725G03G9/08795G03G9/0827G03G9/08G03G15/00G03G15/08
Inventor 田口哲也坂井素子五十岚润高木正博
Owner FUJIFILM BUSINESS INNOVATION CORP
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