Preparation method of dry-type nonmagnetic single-component positive electricity carbon powder for laser printer

A laser printer, non-magnetic technology, applied in optics, electrical recording, instruments, etc., can solve the problems of poor durability, ghosting, bottom dust, and uniformity decline of the full black plate, and achieve high durability, low cost, The effect of excellent image quality

Inactive Publication Date: 2011-05-11
广州市科密办公科技有限公司
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the common disadvantages of positively charged toner used in laser printers in the domestic ma

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] The raw material of the semi-finished product of the dry non-magnetic single-component positively charged carbon powder for the laser printer of the present invention is composed of the following components in parts by weight:

[0022] Styrene-acrylate copolymer 100 parts by weight

[0023] Carbon black 7 parts by weight

[0024] Low molecular polypropylene 3 parts by weight

[0025] Quaternary ammonium salt type charge control agent 2 parts by weight

[0026] The above-mentioned raw materials are mixed uniformly in a high-speed mixer according to parts by weight, extruded and compressed by an extruder, coarsely crushed by a ball mill, and further crushed and classified by a jet mill to obtain semi-finished products. The particle size distribution is as follows:

[0027] Volume average particle size Dv 9.56μm

[0028] Average particle size Dp 7.98μm

[0029] Dv / Dp 1.2

[0030] ≤5μm volume fraction 2%

[0031] ≥16μm volume fraction 0.3%

[0032] Add external additives...

Example Embodiment

[0038] Example 2:

[0039] The raw material of the semi-finished product of the dry non-magnetic single-component positively charged carbon powder for the laser printer of the present invention is composed of the following components in parts by weight:

[0040] Styrene-acrylate copolymer resin 60 parts by weight

[0041] Polyester 40 parts by weight

[0042] Carbon black 7 parts by weight

[0043] Low molecular polypropylene 3 parts by weight

[0044] Carnauba wax 2 parts by weight

[0045] Styrene-acrylic resin type charge control agent 2 parts by weight

[0046] The above-mentioned raw materials are mixed uniformly in a high-speed mixer according to parts by weight, extruded and compressed by an extruder, coarsely crushed by a ball mill, and further crushed and classified by a jet mill to obtain semi-finished products. The particle size distribution is as follows:

[0047] Volume average particle size Dv 8.86μm

[0048] Average particle size Dp 7.14μm

[0049] Dv / Dp 1.24

[0050] ≤5μm volum...

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

PropertyMeasurementUnit
Volume average particle sizeaaaaaaaaaa
Volume average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of dry-type nonmagnetic single-component positive electricity carbon powder for a laser printer, which is implemented according to the following technical proposal: the raw material for the semi-finished product in the dry-type nonmagnetic single-component positive electricity carbon powder for the laser printer contains the following components in parts by weight: 100 parts of adhesive resin, 1 to 20 parts of coloring agent, 0.1 to 15 parts of demolding agent and 0.1 to 10 parts of charge control agent; and the preparation method comprises the steps of uniformly mixing the adhesive resin, the coloring agent, the demolding agent and the charge control agent in a high-speed mixer in proportion, melting and mixing by using an extruder, inputting into a ball mill for roughly crushing after extruding and performing through the extruder, further crushing and grading through a jet mill to obtain the semi-finished product, and adding an external additive in the semi-finished product to prepare the product in the invention. The product in the invention has the advantages that excellent image quality can still be maintained even in a low temperature and moisture environment and a high temperature and moisture environment, the printed images have high durability and low cost, and the product is suitable for a plurality of positive electricity laser printers.

Description

technical field [0001] The invention relates to positively charged carbon powder for laser printers, in particular to a preparation method of dry non-magnetic single-component positively charged carbon powder for laser printers. Background technique [0002] At present, the common disadvantages of positively charged toner for laser printers in the domestic market are poor durability, ghosting, bottom dust, and reduced uniformity of the full black plate in long-term printing. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcoming that above-mentioned laser printer uses electropositive carbon powder to exist, provide a kind of preparation method of dry type non-magnetic one-component electropositive carbon powder for laser printer, make the product of the present invention can be used at low temperature It maintains excellent image quality in low humidity and high temperature and high humidity environments, and the printed imag...

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
IPC IPC(8): G03G9/08G03G9/087G03G9/09G03G9/097
Inventor 王庆国张述营明盛平刘永革黎冬冬
Owner 广州市科密办公科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap