Toner and image forming method

A technology of toner and toner particles, applied in the direction of developer, instrument, optics, etc., can solve problems such as adding

Inactive Publication Date: 2006-08-16
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in all these documents, there is absolutely no mention of adding these substances to the developer

Method used

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  • Toner and image forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0361] The following describes the present invention in more detail through manufacturing examples and embodiments, but this description does not constitute a limitation to the present invention. In addition, the parts in the following compounding ratios are all parts by mass.

[0362] (A-1) Manufacturing of fine particles

[0363] ① Manufacturing of fine particles A-1

[0364] According to the way that the molar ratio of tungsten (W) to tin (Sn) (W / Sn) is 0.05, tin chloride (SnCl 4 ·5H 2 O) and tungstic acid (H 2 WO 4 ) In aqueous solution. According to the mass ratio of tin element: titanium oxide of 2.2:1, while stirring the above mixed aqueous solution at a temperature of 90°C, the mixed aqueous solution was dropped to disperse 200 parts by mass of the titanium oxide forming the matrix particles in Then, hydrochloric acid was added to the suspension solution formed in 2000 parts by mass of water, and the generated coprecipitate was filtered and dried.

[0365] In an electric f...

Embodiment A-1

[0382] (1) Production of toner A-1

[0383] To the toner particles A-1 (100 parts by mass), add hydrophobic silica fine powder (1.2 parts by mass) treated with fine particles A-1 (1.5 parts by mass) and dimethyl silicone oil, and add it to In the Henschel mixer, toner A-1 was prepared. The ratio of fine particles present on the toner surface was 5.0 per toner particle, and the particle diameter ratio of the fine particles to the average diameter of the toner was 0.09.

[0384] (2) Manufacturing of carrier A-1

[0385] As a developing carrier for a two-component developer, the following developing carrier A-1 was produced, in which 0.8 parts by mass of acrylic resin was coated with respect to 100 parts by mass of 45 μm ferrite particles.

[0386] (3) Preparation of two-component developer A-1

[0387] With respect to the developer carrier A-1: ​​100 parts by mass, 7 parts by mass of the toner A-1 were mixed to obtain a two-component system developer A-1.

[0388] Using the obtained...

Embodiment A-2

[0410] In the production of the toner A-1, the toner particles A-2 and the fine particles A-2 were used, and the addition amount of the fine particles was changed to 1.0 part by mass. Other than that, the same method was used. , Toner A-2 was prepared. The ratio of fine particles present on the surface of the toner was 2.2 per toner particle, and the particle diameter ratio of the fine particles to the average diameter of the toner was 0.07.

[0411] A two-component developer A-2 was prepared in the same manner as in Example A-1 except that the toner A-2 was used, and the evaluation was performed in the same manner. In Example A-2, a high-quality image was obtained. The evaluation results related to the above items are shown in Table 1.

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Abstract

The invention aims to provide a toner containing toner particles and micro-particles. The toner particles contain adhesive resin and colorant at least, and the micro-particles contain tin oxide particles containing tungsten element, wherein the molar ratio of the tungsten element (W) to tin element (Sn) lies in a range of 0.001 to 03, and the volume average diameter of the micro-particles lies in a range of 0.1 to 5 mum. The toner is resistant to the environment change and can acquire high-quality image. The invention also provides an image forming method, which can suppress excess voltage at pinholes when adopting contact-electrified mechanism. The toner is characterized in stable electrification even in a high-humidity environment and excellent image reproducibility even after long-term usage.

Description

[0001] This application is a divisional application filed with the Patent Office of the State Intellectual Property Office on September 27, 2002. The application number is 02154257.0, and the invention title is toner and image forming method. Technical field [0002] The present invention relates to a toner for developing electrostatic latent images in electrophotographic methods, electrostatic recording methods, magnetic recording methods, toner jetting methods, etc., and an image forming method using the toner. Background technique [0003] In the past, as an image forming method, various methods such as an electrostatic recording method, a magnetic recording method, and a toner jet method have been known. For example, in the electrophotographic method, an electric latent image is generally formed on an image carrier such as a photoconductor using a photoconductive material by various methods, and then the latent image is developed with a toner to form a visible image. The toner...

Claims

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Application Information

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IPC IPC(8): G03G9/087G03G9/08
Inventor 沟江希克泷口刚荒平文弘伊藤雅教
Owner CANON KK
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