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Image forming method, two-component developer, image forming apparatus and process cartridge
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A two-component developer, developer technology, applied in the direction of developer, electric recording process using charge pattern, equipment for electric recording process using charge pattern, etc., can solve image quality deterioration, easy carrier deterioration, supply And other issues
Active Publication Date: 2012-01-11
RICOH KK
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Problems solved by technology
However, it is difficult to sequentially supply several kinds of replenishment developers contained in the container to the developing device without mixing the developers
In addition, the amount of toner included in each developer is relatively large, so the carrier tends to be easily deteriorated, resulting in a change in image quality when an image is produced by a developing method for a long time
In addition, when the weight of the siliconeresin coating layer formed on the surface of the carrier particles used in the developing method is increased to increase the resistance of the carrier, the charge-imparting ability of the carrier deteriorates despite its increased resistance, thereby degrading the image quality (such as reproducibility) and / or cause problems with background development
Method used
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Embodiment 1
[0408] (1) Preparation of developer
[0409] Mix the following ingredients.
[0410] Transparent toner 1 5 parts
[0411] Coated ferrite carrier 95 parts
[0412] The mixture was mixed for 5 minutes using a TURBULAMIXER mixer from Willy A. Bachofen AG (WAB) rotating at 48 rpm to charge the toner.
[0413] Thus, Developer T1 including Transparent Toner 1 was prepared.
[0414] The procedure for preparing Developer T1 was repeated except that Transparent Toner 1 was replaced with Black Toner 1, Magenta Toner 1, Cyan Toner 1, or Yellow Toner 1, to prepare Black, Magenta, Cyan, and Yellow developers K1, M1, C1 and Y1.
[0415] (2) Preparation of replenishing developer
[0416] Mix the following ingredients.
[0417] Transparent toner 1 80 parts
[0418] Coated ferrite carrier 20 parts
[0419] The mixture was mixed for 5 minutes using a TURBULAMIXER mixer from Willy A. Bachofen AG (WAB) rotating at 48 rpm to charge the toner.
[0420] Thus, replenishment developer TS1 inc...
Embodiment 2
[0466] The developer preparation and evaluation procedures in Example 1 were repeated except that Transparent Toner 3 was used instead of Transparent Toner 1 .
Embodiment 3
[0474] The procedures for preparing and evaluating the developer in Example 1 were repeated except that a solid transparent toner image was first formed on the recording material, and then a solid color toner image was formed thereon (i.e., the transparent toner image and the color tone were reversed). position of the toner image).
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Abstract
The present invention relates to an IMAGE FORMING METHOD, a TWO-COMPONENT DEVELOPER, and IMAGE FORMING APPARATUS AND a PROCESS CARTRIDGE. In the image forming method, at least one color toner image and a transparent toner image are formed using a color developer including a color toner and a carrier and contained in a first developing device, and a second developer including a transparent toner and a carrier and contained in a second developing device. A supplementary developer is supplied at least to the second developing device while discharging excess of the developer in the developing device. The transparent toner includes a lubricant and has a viscoelastic property such that a loss tangent (tan [delta]), which is defined as a ratio (G'' / G') of loss modulus (G'') to storage modulus (G'), has a peak at a temperature of from 80 DEG C. to 160 DEG C. and the peak has a height of not less than 3.
Description
technical field [0001] The present invention relates to an image forming method for forming at least one of a color toner image and a transparent toner image. Furthermore, the present invention also relates to a two-component developer used in the image forming method. Also, the present invention relates to an image forming apparatus and a process cartridge employing the image forming method. Background technique [0002] Electrophotographic image forming methods for dry image forming apparatuses such as laser printers, copiers, and facsimile machines generally include the following processes: [0003] (1) Charge the surface of an image bearing member such as a photoreceptor (charging process); [0004] (2) irradiating the charged image bearing member with light so that the charge of the irradiated portion decays, thereby forming an electrostatic latent image on the image bearing member (irradiation process); [0005] (3) developing the electrostatic latent image with a d...
Claims
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Application Information
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