JPS6162046A - Color magnetic microcapsule toner and color image recording method using said toner - Google Patents

Abstract

PURPOSE:To obtain a sharp color image by using a color magnetic microcapsule toner contg. a heat sublimating dye and executing image recording by heat fixing. CONSTITUTION:The color magnetic microcapsule toner is formed by providing the 1st film wall of a thermoplastic resin contg. the heat sublimating dye on the outside of each microglass sphere and providing the 2nd film wall of a porous heat resistant resin contg. magnetic powder thereon. A photosensitive drum 1 is electrostatically charged over the entire surface by a corona discharger 2 and a latent image is formed thereon by an exposing device 3. The toner image is developed by developing machines 4a-4d and is transferred to plain paper by a transfer device 7. The transferred toner is heated by a heat roll 9 for fixing and the heat sublimating dye is sublimated and fixed onto the plain paper 6. The residual toner remaining on the paper 6 is removed by a cleaning brush 10 and the sharp color image is recorded on the plain paper. The toner particles remaining on the photosensitive drum are removed by a cleaning brush 8.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic toner for developing latent images in recording methods such as electrophotography and electrostatic recording, and an image recording method using the same. More specifically, the present invention relates to a color magnetic microcapsule toner containing a heat sublimable dye and a method for recording a clear color image using the same.

[Conventional technology]

Conventionally, the dry development method for visualizing electrostatic latent images such as electrophotography and electrostatic recording methods is a two-component development method that uses a developer consisting of carrier particles and toner.

There is a one-component development method that uses a developer consisting only of toner. Two-component development method suffers from deterioration of the carrier and difficulty in controlling toner density, while -component development method is a useful method that does not have these drawbacks. , Nikke/L/, lT'
e30. , γ-Fe203. Various types of 7x lights were used, and because these magnetic powders were colored and opaque, such as black and dark brown, it was not possible to produce clear color images in Q+#. Therefore, as a way to solve this drawback,
For example, a method using a heat sublimable dye as shown in JP-A-50-14201, JP-A-53-118053;
A method using a pressure fixing type magnetic microcapsule toner as shown in the above publication has been proposed.

[Problem that the invention seeks to solve]

However, with conventional toners and image recording methods using them, the toner residue after fixing the colorant is not removed well, resulting in a complicated mechanism and the generation of a large amount of unnecessary materials. The only drawback is that you can't get clear color images.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide a color four-sided microcapsule toner capable of producing clear color images and a color image recording method using the same.

[Means for Solving the Problems] In order to solve the above-mentioned point V4, the color magnetic microcapsule toner of the present invention uses a thermoplastic resin containing a heat sublimable dye on the outside of the micro glass spheres. By creating a structure in which a wall is provided and a second transparent wall made of porous heat-resistant resin containing magnetic powder is provided on the outside of the wall, heat-sublimable dye passes through the heat-resistant resin of the second film wall during heat fixing. It can be sublimated and fixed onto plain paper to produce clear color images. Toner residue after fixing is not deformed by heating and can be easily removed.

Thermal sublimation dyes used in the color magnetic microcapsule toner of the present invention include cationic dyes, dispersed anthraquinone dyes, dispersed monoazo dyes, etc.
11 Thermoplastic resins used for walls include polyethylene, polystyrene, polyacrylate, etc.
The heat-resistant sheet and resin used for the membrane wall include aromatic polyamide, polyphenylene, polyxylene, polyimide, polyamideimide, etc., and the magnetic powder mixed with this resin includes ID, iron, cobalt, nickel,
Fe3O4, γ-Fe203. There are various kinds of heavy ferrites.

However, the color + ifj image recording method of the present invention develops an electrostatic latent image in electrophotography, electrostatics, recording if, etc. with the color magnetic microcapsule toner described above, and then transfers this toner 1σ onto plain paper. , is an image recording method in which a heat-sublimable dye in toner is fixed on plain paper by heating, and a clear color image is obtained by removing toner residue remaining on the plain paper after fixing. ] Embodiments of the present invention will be described below with reference to the drawings. In the accompanying drawings, the entire surface of a photosensitive drum 1 is charged by a corona discharger 2, and a latent image is formed by an exposure device 3, 4a, 4b, 4c.

The toner image is developed by the developing machine 4d. The developed toner image is transferred by the transfer device 7 to the plain paper fed by the vinyl roll 5, and the transferred toner is heated by the fixing heat roll 9, and the heat sublimation dye is transferred to the plain paper 6. It is sublimated and fixed on paper. The toner residue remaining on the plain paper 6 is removed by the cleaning brush 10, so that a clear color image is recorded on the plain paper 6, which is fed to the pinch roll 11. After the transfer, the toner particles remaining on the photosensitive drum 1 are removed by the cleaning brush 8, and the next completed image is formed.

[Baby invention]

As explained above, in the color magnetic microcapsule toner of the present invention, the heat sublimable dye contained in the toner is sublimated and fixed on plain paper during heat fixing, and the remaining toner residue is easily deformed by heating. It has the characteristic that it can be easily removed.

If heat-fixed image recording is performed using such toner, a clear color image can be obtained.

[Brief explanation of the drawing]

The figure is a configuration diagram of the main parts of a color electrophotographic apparatus as an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Corona discharger, 3... Exposure device, 4a, 4b, 4c, 4d... Developing machine, 7.
・・・Transfer device, 8...Cleaning brush, 9...Heat roll for fixation, 10...Cleaning brush, Junju

Claims (3)

[Claims] (1) A first film wall containing a heat sublimable dye is provided on the outside of the micro glass sphere, and a second film wall containing magnetic powder is provided on the outside of the first film wall containing a heat sublimable dye.
A color magnetic microcapsule toner characterized by having a membrane wall of. (2) The color magnetic microcapsule toner according to claim 1, wherein the first membrane wall is made of a thermoplastic resin, and the second membrane wall is made of a heat-resistant resin and is porous. (3) An electrostatic latent image formed by a recording method such as electrophotography or electrostatic recording method is developed with the color magnetic microcapsule toner described in claims 1 and 2, and this toner image is heated. A color image recording method characterized by sublimating the heat-sublimable dye contained in the toner and transferring it to plain paper, etc., and then removing the heated toner residue to form a color image. .