Toner, method for manufacturing toner, toner storage unit, image forming apparatus, and image forming method

Abstract

To provide a toner that is excellent in low temperature fixability and heat-resistant storage property and can obtain stable image quality.SOLUTION: A toner has a core including crystalline polyester and a shell formed on the surface of the core. The aspect ratio of the crystalline polyester in the toner is 1 or more and 3 or less. The major axes of the crystalline polyester have an average length of 10 nm or more and 500 nm or less.SELECTED DRAWING: None

Claims

1. A toner comprising a core containing crystalline polyester and a shell formed on the surface of the core, The core comprises an amorphous polyester, The crystalline polyester is a crystalline polyester synthesized solely from linear aliphatic diols and linear aliphatic dicarboxylic acids. The aspect ratio of the crystalline polyester in the toner is 1.13 or more and 2.9 or less. The average length of the major axis of the crystalline polyester is 10 nm or more and 500 nm or less. toner.

2. The aspect ratio is 1 or more and 2 or less. The toner according to claim 1.

3. The average length of the major axis is 30 nm or more and 300 nm or less. The toner according to claim 1.

4. The acid value of the resin constituting the shell is greater than the acid value of the resin constituting the core, excluding the crystalline polyester. The toner according to claim 1.

5. A method for manufacturing toner as described in claim 1, The process involves at least preparing an oil phase in which a resin and a release agent are dissolved or dispersed in an organic solvent, A step of adding an aqueous medium to the oil phase to convert the water-in-oil emulsion to an oil-in-water emulsion, The process includes adding the dispersion of the crystalline polyester to the oil-in-water emulsion. Toner manufacturing method.

6. A container for the toner described in claim 1, Toner storage unit.

7. Electrostatic latent image carrier, An electrostatic latent image forming means for forming an electrostatic latent image on the electrostatic latent image carrier, A developing means comprising the toner, which develops the electrostatic latent image formed on the electrostatic latent image carrier using the toner described in claim 1 to form a toner image, A transfer means for transferring a toner image formed on the electrostatic latent image carrier to the surface of a recording medium, The recording medium includes fixing means for fixing the toner image transferred to its surface, Image forming apparatus.

8. An electrostatic latent image formation step in which an electrostatic latent image is formed on an electrostatic latent image carrier, A developing step to form a toner image by developing the electrostatic latent image formed on the electrostatic latent image carrier using the toner described in claim 1, A transfer step of transferring a toner image formed on the electrostatic latent image carrier to a recording medium, The process includes a fixing step for fixing the toner image transferred to the recording medium. Image forming method.

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