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Toner, method for producing the toner, and image forming method

A technology of toner and release agent, applied in the field of toner, can solve problems such as large temperature and change, and achieve the effects of less pollution, excellent release property, and wide fixing temperature range

Active Publication Date: 2013-07-03
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, keeping the temperature of the heating medium at a specific low temperature tends to cause a larger change in temperature during continuous paper feeding

Method used

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  • Toner, method for producing the toner, and image forming method
  • Toner, method for producing the toner, and image forming method
  • Toner, method for producing the toner, and image forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0427] [Manufacture of the toner of Example 1]

[0428]

[0429] Add 400 parts of [low-molecular-weight polyester 1], 115 parts of synthetic ester wax (mixture) shown in the following Tables 3-1 and 3-2 (that is, synthetic ester wax ( A mixture of 1) and (2) in a mass ratio of (1) / (2) of 50 / 50) and 1,000 parts of ethyl acetate. Then, the temperature of the resulting mixture was raised to 80°C with stirring, maintained at 80°C for 8 hours, and cooled to 24°C over 1 hour. The obtained dispersion was treated with a bead mill (Ultra Visco Mill, a product of Aymex Co.) under the following conditions: liquid feed rate: 1 kg / hr; disk peripheral speed: 6 m / s; added 0.5 mm ( diameter) zirconia beads: 80% by volume; and the number of passes: 3, whereby the synthetic ester wax (WAX) was dispersed to obtain [wax dispersion 1].

[0430] By measuring the dispersion diameter of [wax dispersion liquid 1] using LA-920, it was found that [wax dispersion liquid 1] had an average particle dia...

Embodiment 5

[0457] [Manufacture of the toner of Example 5]

[0458]

[0459] Add 400 parts of [low-molecular-weight polyester 1], 130 parts of synthetic ester wax (mixture) shown in the following Tables 3-1 and 3-2 (that is, synthetic ester wax ( A mixture of 1) and (4) in a mass ratio of (1) / (4) of 50 / 50) and 1,000 parts of ethyl acetate. Then, the temperature of the resulting mixture was raised to 80°C with stirring, maintained at 80°C for 8 hours, and cooled to 24°C over 1 hour. The obtained dispersion was treated with a bead mill (Ultra Visco Mill, a product of Aymex Co.) under the following conditions: liquid feed rate: 1 kg / hr; disc peripheral speed: 6 m / s; added 0.5 mm (diameter) Amount of zirconia beads: 80% by volume; and Number of passes: 3 to disperse synthetic ester wax (WAX) to obtain [wax dispersion 5].

[0460] By measuring the dispersion diameter of [wax dispersion liquid 5] using LA-920, it was found that [wax dispersion liquid 5] had an average particle diameter (wax...

Embodiment 6

[0484]

[0485] [Crystalline polyester resin 2] (110 g) and ethyl acetate (450 g) were charged into a 2 L metal container. The resulting mixture was dissolved or dispersed under heating at 80° C., and then quenched in an ice-water bath. Subsequently, glass beads (3 mm in diameter) (500 mL) were added to the mixture, followed by stirring for 10 hours with a batch-type sand mill (product of Kanpe Hapio Co., Ltd.), thereby obtaining a particle having a volume average particle diameter of 0.45 μm. [Crystalline polyester dispersion 2].

[0486] [Manufacture of the toner of Example 6]

[0487] The procedure of Example 5 was repeated except that while keeping the total amount of the release agent constant, the combination and mixing ratio of the synthetic ester waxes were changed as described in the following Tables 3-1 and 3-2 to prepare wax dispersions and [Crystalline polyester dispersion liquid 1] was changed to [Crystalline polyester dispersion liquid liquid 2], thereby prod...

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Abstract

A toner including a binder resin containing an ester bond, and a releasing agent, wherein the releasing agent includes first C30-C50 alkyl monoester compound and second C30-C50 alkyl monoester compound, wherein the number of carbon atoms of the first C30-C50 alkyl monoester compound is different from that of the second C30-C50 alkyl monoester compound, wherein the amount of the first C30-C50 alkyl monoester compound is largest and the amount of the second C30-C50 alkyl monoester compound is second largest or same as the amount of the first C3OC50 alkyl monoester compound, wherein the amount of the first C30-C50 alkyl monoester compound is 30% by mass or more but less than 50% by mass to the releasing agent, and wherein the amount of the second C30-C50 alkyl monoester compound is 10% by mass or more but less than 50% by mass to the releasing agent.

Description

technical field [0001] The present invention relates to a toner, a method of manufacturing the toner, and an image forming method. Background technique [0002] A developer used in, for example, electrophotography, electrostatic recording, and electrostatic printing is attached to an image bearing member on which an electrostatic image has been formed in a developing step; and then, is transferred from the image bearing member to a recording medium ( For example, on recording paper); then, in the fixing step, is fixed on the surface of the recording medium. As already known, such developers that develop an electrostatic image formed on an image bearing member are roughly classified into two-component developers formed of a carrier and toner and one-component developers (magnetic or magnetic) that do not require a carrier. non-magnetic toner). [0003] Conventionally, dry toners used in electrophotography, electrostatic recording, electrostatic printing, etc. are produced b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/08B65D83/06C08G63/91G03G9/087
CPCC08G63/916G03G9/0804G03G9/0819G03G9/08755G03G9/08782G03G9/08795G03G9/08797
Inventor 山下裕士白数雄一村山智纪渡边政树
Owner RICOH KK
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