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Environmentally-friendly developer and manufacturing method thereof

A developer and environmentally friendly technology, applied in the field of environmentally friendly developer, can solve the problems of increased adhesive force of developer, worsening of developer frictional charging uniformity, and lower yield, so as to suppress cold fixing offset and hot fixing offset. The effects of shifting, improving the uniformity of triboelectric charging, and increasing the rate and yield

Active Publication Date: 2012-04-25
ICMI CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like this, there is the dispersibility problem of bio-resin and release agent in petroleum-based resin simultaneously in mixing process, easily produces bio-resin and / or release agent to disperse unevenly in petroleum-based resin, thus produces more when pulverizing. A lot of excessively pulverized fine powder reduces the yield during pulverization and increases the production cost of the developer
Moreover, the composition of each particle of the obtained developer is not uniform, and the probability of occurrence of bio-resin and release agent on the surface of the developer is greatly increased, which affects the triboelectric performance of the developer, makes the uniformity of the developer tribocharge worse, and develops The adhesive force between the agents increases, which makes the developer prone to a series of defects such as light color density, high background dust, developer sticking out of the powder knife, and developer sticking to the organic photoreceptor (OPC) during the imaging process.

Method used

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  • Environmentally-friendly developer and manufacturing method thereof
  • Environmentally-friendly developer and manufacturing method thereof
  • Environmentally-friendly developer and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] Preparation of powder W-1

[0043] Prepare 100 parts by weight of polylactic acid bioresin (Tg: 62°C, T1 / 2: 160°C), 5 parts by weight of polypropylene wax (Tm: 145°C), mix them with a Henschel high-speed mixer, and then mix the mixed materials Melt kneading and extrusion is carried out on a twin-screw extruder. The melt temperature of the melt kneading is controlled at about 175°C. The material extruded by kneading is rapidly cooled by a blower, and then coarsely crushed into particle size on a hammer crusher. powder of 0.1-2mm to obtain powder W-1.

[0044] Preparation of powder W-2

[0045] Prepare 100 parts by weight of polylactic acid bioresin (Tg: 58°C, T1 / 2: 150°C), 40 parts by weight of polypropylene wax (Tm: 110°C), mix them with a Henschel high-speed mixer, and then mix the mixed materials Melt mixing and extrusion is carried out on a twin-screw extruder. The melt temperature of the melt mixing is controlled at about 165°C. The material extruded by mixing is ...

Embodiment 1

[0051] Prepare 100 parts by weight of styrene-butyl acrylate resin (Tg: 57°C, T1 / 2: 141°C), 60 parts by weight of W-1, 10 parts by weight of carbon black, and 3 parts by weight of azo-iron complex, using Henry The Scheer high-speed mixer is used for mixing, and then the mixed materials are melted, kneaded and extruded on the twin-screw extruder. The temperature of the melted kneaded melt is controlled at about 165 ° C. Cool, then coarsely crush into powders with a particle size of 0.1-2mm on a hammer-type coarse crusher, and then finely crush and classify the coarsely crushed powder on a jet mill classifier to obtain an MVD of 9 microns and a P>5 of 88 % micropowder, then get 100 parts by weight of micropowder, 1 part by weight of silicon dioxide (such as R202 produced by Degussa company), and 0.1 part by weight of zinc stearate micropowder (MVD is 100nm) on the Henschel high-speed mixer Fully post-mix, and finally sieve through an ultrasonic vibration sieving machine to obtai...

Embodiment 2

[0053] Prepare 100 parts by weight of polyester resin (Tg: 57°C, T1 / 2: 135°C), 15 parts by weight of W-2, 120 parts by weight of ferroferric oxide magnetic powder, and 3 parts by weight of azo-iron complex. The Scheer high-speed mixer is used for mixing, and then the mixed materials are melted and kneaded on the twin-screw extruder. Cool, then coarsely crush into powders with a particle size of 0.1-2mm on a hammer-type coarse crusher, and then finely crush and classify the coarsely crushed powder on a jet mill classifier to obtain an MVD of 8 microns and a P>5 of 83 % micropowder, then get 100 parts by weight of micropowder, 1 part by weight of silicon dioxide (such as R202 produced by Degussa company), and 0.1 part by weight of zinc stearate micropowder (MVD is 100nm) on the Henschel high-speed mixer Fully post-mix, and finally sieve through an ultrasonic vibration sieving machine to obtain the environment-friendly developer of Example 2.

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Abstract

The invention discloses an environmentally-friendly developer and a manufacturing method thereof. The environmentally-friendly developer comprises petroleum base resin, bio-based resin, coloring agent and release agent, wherein release agent particles are evenly distributed in bio-based resin particles, and the bio-based resin particles containing the release agent particles are evenly distributed in the bio-based resin particles. The manufacturing method comprises the following steps: preliminary mixing: mixing the bio-based resin and the release agent in a high-speed mixer; preparing powder: fusing, mixing and extruding the obtained material in a double-screw extruder, quickly cooling, and smashing in a coarse crusher to obtain powder of which the particle diameter is 0.1-2 mm, wherein the release agent particles are evenly distributed in the bio-based resin particles; re-mixing: mixing the powder, the petroleum base resin, the coloring agent and charge control agent in the high-speed mixer, fusing, mixing and extruding the mixed material by the double-screw extruder, quickly cooling, coarsely crushing on the coarse crusher to obtain the material of which the particle size is 0.1-2 mm, and obtaining the micro powder after passing through an airflow smashing grader, wherein the diameter of the micro powder is 6-15 micrometers in volume distribution, and the diameter of 60-90%of micro powder is more than 5 micrometers; and adding: mixing the micro powder and external additive in the high-speed mixer, and removing coarse powder by screening or grading. The invention has the advantages of environment protection, excellent manufacturing manufacturability and good imaging quality.

Description

technical field [0001] The invention relates to an environmentally friendly developer used in electrophotographic imaging equipment and a manufacturing method. Background technique [0002] Electrophotographic imaging equipment includes copiers, laser printers, and multifunctional machines, etc., which use a developer to form text or images on paper and other media. [0003] The developer is generally a composition composed of at least a binder resin, a release agent and a colorant, and the binder resin accounts for the majority of the developer. The early adhesive resins were all made from chemical raw materials such as styrene and acrylic acid extracted from petroleum through polymerization chemical reactions. Although the developer made of petroleum-based resin as the binder resin can obtain a good imaging effect, it is difficult to degrade in the natural environment when the developer is discarded, thereby polluting the environment, even if the discarded The developer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/087G03G9/08
CPCG03G9/0819G03G9/08782G03G9/08775G03G9/0808
Inventor 谭红亮汤付根
Owner ICMI CHINA
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