Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Image-forming apparatus and cartridge

By using a combination of specific electrophotographic photoreceptors and toners in the image forming device, problems such as image white bottom contamination, afterimages, and scattering are solved, and high-resolution and high-quality printing is achieved, which satisfies high-speed and long-term use. requirements.

Active Publication Date: 2010-03-24
MITSUBISHI RAYON CO LTD
View PDF32 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] The present invention has been made in view of the above-mentioned background art, and its object is to provide an image forming apparatus and a process cartridge excellent in image stability, and when using the image forming apparatus, the uneven particle size distribution of the toner, the toner Image quality can be improved at the same time as contamination of the white background of the image, afterimages (memory, ghosting), scattering in the device, streaks, blurring (solid followability), etc. caused by the quality of matching with the photoreceptor. It has good cleaning performance, does not cause the problem of dropping dots to light density, and has good reproducibility of thin lines. Even when using a high-speed printing machine, it can also improve problems such as pollution during long-term use.

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
  • Image-forming apparatus and cartridge
  • Image-forming apparatus and cartridge
  • Image-forming apparatus and cartridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0530] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited to the following examples unless the gist is exceeded. In the following examples, unless otherwise specified, "part" means "weight part", and "%" means "mass %".

[0531]

[0532] For particles with a volume average particle diameter (Mv) of less than 1 μm, the volume average particle diameter (Mv) is measured as follows: Microtrac Nanotrac 150 (model) manufactured by Nikkiso Co., Ltd. (hereinafter, abbreviated as "NANOTRAC") ), according to the operation manual of NANOTRAC, and using the analytical software Microtrac Particle Analyzer Ver10.1.2.-019EE compiled by Nikkiso Co., Ltd., using ion-exchanged water with a conductivity of 0.5 μS / cm as the dispersion medium, under the following conditions or The following conditions were input, and the volume average particle diameter (Mv) was measured by the method described in the instruction ma...

manufacture example 1

[0607]

[0608] 27 parts (540g) of paraffin (HNP-9 manufactured by Nippon Seika Co., Ltd., surface tension 23.5mN / m, thermal characteristics: melting point peak temperature 82°C, heat of fusion 220J / g, melting peak width at half maximum 8.2°C, crystallization temperature 66°C, crystallization peak half width 13.0°C), 2.8 parts of octadecyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 1.9 parts of 20% by mass sodium dodecylbenzenesulfonate aqueous solution (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., NEOGEN S20A ) (hereinafter abbreviated as "20% DBS aqueous solution"), 68.3 parts of deionized water were heated to 90° C., and stirred for 10 minutes using a high-speed mixer (manufactured by Tokube Kikka Kogyo Co., Ltd., model: mark II f).

[0609] Next, the dispersion liquid was heated to 90° C., and using a homogenizer (manufactured by Gaulin, 15-M-8PA type), circulation emulsification was started under a pressurized condition of 25 MPa, and disper...

manufacture example 2

[0670]

[0671] In the aggregation process (nuclear material aggregation process and cladding process), circularization process, cleaning process, and drying process of "production of toner base particles A", the "nuclear material aggregation process" and "shell process" Toner mother particles B were obtained in the same manner as in "Manufacturing of toner mother particles A" in Example 1 except that the "circularization step" was changed as follows.

[0672] ○Nuclear material condensation process

[0673] Add polymer primary particle dispersion A1 and 20 to the mixer (capacity 12L, inner diameter 208mm, height 355mm) equipped with stirring device (double propeller blade), heating and cooling device, concentration device and feeding device of various raw materials and additives % DBS aqueous solution, mixed uniformly for 5 minutes at an internal temperature of 7°C. Then keep the internal temperature at 7°C, and add 0.52 parts of a 5% by mass aqueous solution of ferrous sul...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention provides an image-forming apparatus and a cartridge which inhibit troubles attributable to toner particle size distribution or toner / photoreceptor matching, such as a white-background fouling, afterimage, scattering, streaks, blurring, and blind spots, and are satisfactory with respect to image quality, thin-line reproducibility, and cleanability. Even when applied to a high-speed printer, the apparatus and cartridge can prevent fouling and selective development in long-term use and can stably form high-resolution images. The image-forming apparatus has an electrophotographic photoreceptor which includes a photosensitive layer containing an oxytitanium phthalocyanine which has major diffraction peaks for a CuK alpha line at Bragg angles (2 theta) of 9.0 DEG and 27.2 DEG andhas at least one major diffraction peak for the line in the range of from 9.3 DEG to 9.8 DEG . It employs a toner satisfying all of the following requirements: (1) the volume median diameter (Dv50)is 4.0-7.0 mu m; (2) the average roundness is 0.93 or higher; and (3) the volume median diameter (Dv50) and the percentage by number of toner particles having a size of 2.00-3.56 mu m (Dns) satisfy the relationship Dns<=0.233EXP(17.3 / Dv50).

Description

technical field [0001] The present invention relates to an image forming apparatus and a process cartridge for copiers, printers, and the like. Background technique [0002] In recent years, the use of image forming devices such as electrophotographic copiers has been expanding, and the market has been demanding higher image quality. Especially for transactional documents, etc., the input mapping technology and latent image forming technology have been developed. Not only that, but also the types of fonts for output are more abundant and finer. Moreover, with the popularization and development of display software, The reproducibility of latent images with extremely high image quality with fewer defects and blurring in printed images is required. In particular, as a developer used in the case where the electrostatic latent image on the latent image carrier constituting the image forming apparatus is a line image of 100 μm or less (about 300 dpi or more), if a conventional la...

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): G03G9/08G03G5/06G03G9/087
CPCG03G2215/00957G03G9/0819G03G13/08G03G5/0696G03G5/047G03G9/0918G03G9/0827
Inventor 和田光央三森光幸高村宽昭太田匡哉瀬之口辉纪佐野志穗杉原正和安富史郎平原裕美大和田毅
Owner MITSUBISHI RAYON CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com