Supercharge Your Innovation With Domain-Expert AI Agents!

Toner for electrostatic development, image forming appratus

A technology of toner and electrostatic charge, applied in the fields of electrostatic charge developing toner and image forming device, can solve problems such as image defects, and achieve the effect of maintaining good chargeability

Active Publication Date: 2012-10-03
KYOCERA DOCUMENT SOLUTIONS INC
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, if the resin particles adhere to the surface of the photoreceptor, it is easy to cause image defects due to black spots and black stripes in the image.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Toner for electrostatic development, image forming appratus
  • Toner for electrostatic development, image forming appratus
  • Toner for electrostatic development, image forming appratus

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] (Preparation method of toner masterbatch)

[0039] The toner base particles can be prepared by known kneading and pulverization methods, polymerization methods, spinning methods, and the like. For example, when using the kneading and pulverization method, it is prepared in the following order. First, necessary raw materials such as the above-mentioned binder resin, a colorant corresponding to the color of the toner, a charge control agent, and wax are mixed with a mixer such as a Henschel mixer. Then, after melt-mixing with a twin-screw extruder or the like, pulverization is carried out with a pulverizer such as a hammer mill. Then, the toner base particles can be obtained by classifying with a classifier such as an air classifier.

[0040] The volume-based average particle diameter of the toner base particles thus obtained is preferably 3.0 μm to 10.0 μm.

[0041] In addition, the volume-based average particle diameter of the toner base particles can be measured, fo...

Embodiment 1

[0116]

[0117] To 100 parts of a polyester resin obtained by condensing bisphenol and fumaric acid as a binder resin (Mitsui Chemicals, Almadex P645) was added as a colorant copper phthalocyanine pigment (Pigment Blue 15-3 (manufactured by BASF, Heliogen Blue D7079)) 4 parts, 2 parts of a quaternary ammonium salt compound (manufactured by ORIENT CHEMICAL, "Bontron P-51") as a charge control agent, and Fischer-Tropsch wax as a wax (manufactured by NIPPON SEIRO, "FT- 100") 3 servings. This mixture was put into a Henschel mixer (manufactured by Mitsui Mining Co., Ltd.), and mixed for 2 minutes. Then, the toner kneaded product was prepared by melting and kneading using a twin-screw extruder. The obtained toner kneaded product was finely pulverized by a jet mill, and classified by an air classifier to obtain toner mother particles having an average particle diameter of 8 μm on a volume basis.

[0118] In addition, the volume-based average particle diameter of the toner base pa...

Embodiment 2～9

[0132] A two-component developer was prepared in the same manner as in Example 1 except that the type and addition amount of the resin fine particles were changed as shown in Table 1, and various evaluations were performed. The results are shown in Table 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a toner for electrostatic development and an image forming apparatus. The toner for electrostatic development may include toner base particles, resin fine particles added into the toner base particles, and hydrophobic silica. The resin fine particles may include a polymer having an isobornyl group-containing acrylate monomer. In the invention, the electrical property can bemaintained well, and the resin fine particles may be prevented from being attacted onto the surface of the light-sensitive body in the high-temperature and high-humidity environment.

Description

technical field [0001] The present invention relates to a toner for electrostatic charge development and an image forming apparatus. Background technique [0002] In recent years, image forming apparatuses such as printers and multi-function peripherals have been required to have higher image quality, longer life, and higher speed. In response to these demands, particle size reduction of toner for electrostatic charge development (hereinafter, sometimes simply referred to as "toner") is expected. [0003] However, the smaller the particle size of the toner, the more difficult it is to control the charge amount of the toner particles. Therefore, there are limitations in terms of longer life and higher speed. [0004] Therefore, there is known a method of controlling the charge amount of toner by changing the type or amount of a charge control agent constituting toner base particles or an external additive externally added (added) to toner base particles. [0005] Hydrophob...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/097G03G15/01
Inventor 仓增浩二
Owner KYOCERA DOCUMENT SOLUTIONS INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com