Supercharge Your Innovation With Domain-Expert AI Agents!

Toner and method for producing the same

一种墨粉、粉状的技术，应用在生产墨粉领域，达到容易生产、生产效率和经济效率优良、生产和经济效率优良的效果

Inactive Publication Date: 2008-01-02
RICOH KK
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] [7] The above problems can be solved as follows:

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 and method for producing the same
  • Toner and method for producing the same
  • Toner and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] Preparation of Toner Material

[0154] [113] 50% by mass of polyester resin, 30% by mass of styrene-acrylate copolymer, 15% by mass of carbon black, 4.5% by mass of wax and 0.5% by mass % of the charge control agent is melt-kneaded, cooled, solidified, and then roughly ground with a hammer mill to prepare a toner raw material.

[0155] Grinding and Grading

[0156] [114] Grinding and grading the toner raw material according to the process flow of the grinding and grading steps shown in FIG. 2 . In the flow shown in FIG. 2, any powdery particles and other particles are returned from the fourth classifier 13 in the classifying step to the second cyclone unit 8 in the grinding step through the return pipe 13b. In the second cyclone unit 8, a two-stage cyclone is used.

[0157] [115] According to the flow chart of the milling and classifying step shown in Figure 2, the particles were milled and classified for 5 hours, and the particle size and particle size distribution ...

Embodiment 2

[0167] [122] Grinding and grading the same toner raw material as in Example 1 to produce toner according to the flow of grinding and grading steps shown in FIG. 2 is as follows:

[0168] [123] In Example 2, the amount of particles returned to the second cyclone unit 8 by the particles is adjusted to a constant value in the range of 15% to 35% of the total volume of the second cyclone unit, and then the particles are ground and classification for 5 hours, and the particle size and particle size distribution of the particles were measured every 30 minutes in the same manner as in Example 1. The toner had a number-average particle diameter of 7.2 μm, a mass-average particle diameter of 9.0 μm, a content of powdery particles having a particle diameter of 4.0 μm or less of 24.0 number-average % (standard deviation σ=2.0), and a yield of 88.0%.

[0169] [124] Alternatively, the amount of particles returned to the second cyclone unit 8 is adjusted to a constant value in the range of...

Embodiment 3

[0172] [126] Grinding and grading the same toner raw material as in Example 1 to produce toner according to the flow of grinding and grading steps shown in FIG. 3 is as follows:

[0173] [127] The flow of the grinding and classifying step shown in FIG. 3 is the same as the flow of the grinding and classifying step shown in FIG. 2, except that the constriction 17 shown in FIG. The particle introduction pipe of the third classifier 10, and the constricted portion 18 shown in FIG. 6 is arranged in the particle introduction pipe of the fourth classifier 13 shown in FIG.

[0174] [128] The cross-section A2 of the constricted part is set at a fixed value ranging from 1×(A1 / 20) to 10×(A1 / 20), and then the particles are ground and classified for 5 hours, and in the same manner as in Example 1 The particle size and particle size distribution of the particles were measured every 30 minutes in the same way. The toner had a number-average particle diameter of 7.4 μm, a mass-average parti...

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

To provide a method for producing a toner, containing a milling step containing finely milling particles and classifying coarse particles by using at least a mill and a cyclone unit, and a classifying step containing classifying pulverized particles by using at least a classifier and a cyclone unit, wherein any of the pulverized particles and other particles, which are classified by the classifier in the classifying step and returned, are returned to the cyclone unit in the milling step, and a toner produced by the method for producing the toner.

Description

technical field [0001] [1] The present invention relates to a method of producing a toner, and to a toner produced by the method, which is excellent in production efficiency and economic efficiency. In this method, in the grinding and classifying steps of the toner, powdery particles more than necessary contained in the toner as a product are accurately classified, and toner having excellent quality characteristics can be stably and easily produced. Background technique [0002] 【2】Traditionally, the methods used to grind and classify toner are (1) a pair of classifier and grinder or two or more pairs thereof, (2) a combination of two classifiers and a grinder or similar methods It has been proposed (Japanese Patent (JP-B) No. 2851872, Japanese Patent Application Publication (JP-B) No. 6-66034, Japanese Patent Application Publication (JP-A) No. 2003-275685 and No. 11-15194, and JP- B 3748555). For example, a jet mill unit, known as a jet mill, in which a high-pressure air ...

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 Applications(China)
IPC IPC(8): B02C23/08B04C5/02B04C5/14B04C5/08B07B11/02B07B7/086
CPCG03G9/0819G03G9/0815G03G9/0817G03G9/081
Inventor 久保田光治渡边昌司胁本光太牧野信康
Owner RICOH KK
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