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Toner particles for electrostatic charge image development and toner composition for electrostatic charge image development

A technology of electrostatic charge image and toner, applied in the direction of developer, electrography, instrument, etc., to achieve the effect of excellent fixation and heat-resistant storage

Pending Publication Date: 2022-05-06
TOMOEGAWA PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, when the resin film forms a homogeneous film, even if pressure is applied to the toner in the above-mentioned fixing process, the resin film may not be easily broken, and it may be difficult to fix the toner on the recording medium satisfactorily. topic

Method used

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  • Toner particles for electrostatic charge image development and toner composition for electrostatic charge image development
  • Toner particles for electrostatic charge image development and toner composition for electrostatic charge image development
  • Toner particles for electrostatic charge image development and toner composition for electrostatic charge image development

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] The carbon powder masterbatch raw materials (polyester resin, wax, carbon black, charge control agent) were mixed in parts by weight recorded in Table 1, and carried out hot-melt kneading treatment with a commercially available extruder. The treated mixture was coarsely pulverized by a hammer mill, finely pulverized by a jet mill, and classified into an average particle size of 8 μm by a jet classifier to obtain carbon powder masterbatches. The obtained carbon powder mother particles have recesses of 50 nm or more and 500 nm or less.

[0130] After stirring the obtained toner masterbatch and resin particles (styrene acrylic resin: average particle diameter 40nm, standard deviation of particle diameter 0.11), in the mixing device, the toner masterbatch is collided with styrene acrylic resin, and the Silica was added to the obtained particles to obtain carbon powder particles according to the present invention. It was confirmed that the obtained carbon powder base partic...

Embodiment 2

[0132] The toner particles of Example 2 were obtained in the same manner as in Example 1 except that the resin fine particles (acrylic resin) were changed to 8 parts by weight. In the toner particles of Example 2, the ratio of the film (B) portion to the entire resin film was 56%. In addition, in the resin film, all except the said film (B) part are film (A) parts. Furthermore, the film (B) portion is a resin film in which resins are laminated in layers, and as a lamination method, lamination is performed in a direction away from the surface of the toner mother particle.

Embodiment 3

[0134] Change the carbon powder masterbatch raw material (polyester resin) into styrene acrylic resin, change the weight parts of each raw material into the value recorded in table 1, except that, operate in the same way as Example 1, obtain the carbon of Example 3 powder particles. In the toner particles of Example 3, the ratio of the film (B) portion to the entire resin film was 35%. In addition, in the resin film, all except the said film (B) part are film (A) parts. Furthermore, the film (B) portion is a resin film in which resins are laminated in layers, and as a lamination method, lamination is performed in a direction away from the surface of the toner mother particle.

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Abstract

Provided are toner particles for developing electrostatic charge images, which are less susceptible to the particle diameter of resin microparticles and have excellent fixity and heat-resistant storage properties. The toner particles for electrostatic charge image development according to the present invention are characterized by containing a toner master batch and a resin coating film covering the toner master batch, the toner master batch having recesses on the surface thereof, the recesses including recesses having a depth of 50-500 nm, the resin coating film having a coating film (A) portion having a thickness of 10-50 nm and less than 50 nm and a coating film (B) portion having a thickness of 50-500 nm, the film (B) portion is present on the recessed portion.

Description

technical field [0001] The present invention relates to toner particles for developing an electrostatic image and a toner composition for developing an electrostatic image. Background technique [0002] Electrophotography is widely used as one of image forming methods in copiers, printers, facsimiles, and the like. Generally, image formation using electrophotography includes: using a charged scraper, a charged brush, etc., to irradiate laser light, LED light, etc. Toner (hereinafter referred to simply as toner also has the same meaning) adheres to the electrostatic latent image to form a development process of the toner image, a transfer process of transferring the toner image to a recording medium such as a recording medium, and A fixing process in which the transferred toner image is melted on the recording medium by contact with a heat medium, infrared radiation, etc., and then released with heat. [0003] Regarding such toner, from the viewpoint of power saving, in ord...

Claims

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Application Information

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IPC IPC(8): G03G9/08G03G9/093
CPCG03G9/09392G03G9/09371G03G9/09314G03G9/08G03G9/09321G03G9/09307G03G9/0827
Inventor 木村雄大八束郁子佐野隆之
Owner TOMOEGAWA PAPER CO LTD
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