WO2005091082A1 - トナー及びその製造方法、並びに、現像剤、トナー入り容器、プロセスカートリッジ、画像形成装置及び画像形成方法 - Google Patents
トナー及びその製造方法、並びに、現像剤、トナー入り容器、プロセスカートリッジ、画像形成装置及び画像形成方法 Download PDFInfo
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- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
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- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
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- IHBMMJGTJFPEQY-UHFFFAOYSA-N sulfanylidene(sulfanylidenestibanylsulfanyl)stibane Chemical compound S=[Sb]S[Sb]=S IHBMMJGTJFPEQY-UHFFFAOYSA-N 0.000 description 1
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- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 150000004961 triphenylmethanes Chemical class 0.000 description 1
- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000000984 vat dye Substances 0.000 description 1
- JEVGKYBUANQAKG-UHFFFAOYSA-N victoria blue R Chemical compound [Cl-].C12=CC=CC=C2C(=[NH+]CC)C=CC1=C(C=1C=CC(=CC=1)N(C)C)C1=CC=C(N(C)C)C=C1 JEVGKYBUANQAKG-UHFFFAOYSA-N 0.000 description 1
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- 239000011787 zinc oxide Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/0825—Developers with toner particles characterised by their structure; characterised by non-homogenuous distribution of components
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/0802—Preparation methods
- G03G9/081—Preparation methods by mixing the toner components in a liquefied state; melt kneading; reactive mixing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/093—Encapsulated toner particles
- G03G9/09307—Encapsulated toner particles specified by the shell material
- G03G9/09314—Macromolecular compounds
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/093—Encapsulated toner particles
- G03G9/09392—Preparation thereof
Definitions
- Toner and manufacturing method thereof developer, container with toner, process cartridge, image forming apparatus, and image forming method
- the present invention relates to a toner suitable as a toner used in an electrophotographic method, an electrostatic recording method, an electrostatic printing method and the like, a method for efficiently producing the toner, a developer using the toner, and a toner.
- the present invention relates to a container, a process cartridge, an image forming apparatus, and an image forming method.
- a melt-kneading pulverization method has been known, but in recent years, a method based on a polymerization method (a suspension method, an emulsification method, a dispersion method, and the like) in a liquid solvent has become mainstream.
- Polymerized toner produced by such a polymerization method can effectively exhibit desired functions as expressed by names such as capsule toner and core-shell toner from the viewpoint of considering environmental issues in recent years. Is provided with a unique form!
- a toner having better performance can be produced as compared with the pulverization method, but it is difficult to form arbitrary droplets in a dispersion medium. Due to the narrow range of choice of materials to be used for the toner, and particularly to the toner produced by the emulsion polymerization method, the coloring properties, the releasability, the charging performance, etc. are unevenly distributed due to the unevenness of the components forming the toner. Problem arises.
- Patent Document 1 discloses that a hydrophilic portion, Before performing the emulsion polymerization or the soap-free emulsion polymerization using a polymerization initiator having a surfactant having a structure having a water-phobic part and a polymerization initiation part therebetween, at least a colorant, a charge control agent, and a wax are used. There has been proposed a toner production method including a step of dispersing one kind in water with a polymerization initiator to prepare an aqueous dispersion having micelles containing these components.
- Patent Document 1 JP-A-2003-21933
- a coating layer is formed on the surface of a parent toner particle by at least one of a supercritical fluid and a subcritical fluid, and the coloring property, the releasability, the charging performance, the surface properties, and the like are obtained.
- a toner functional substance such as a colorant, a resin, a release agent, and a charge control agent is dissolved in at least one of a supercritical fluid and a subcritical fluid as a material for coating the surface of the toner base particles.
- the present invention is based on the above findings of the present inventors, and means for solving the above problems are as follows. That is,
- a toner base particle manufacturing step of manufacturing toner base particles containing at least resin fine particles, and a toner functional substance is formed on the surface of the toner base particles by using at least one of a supercritical fluid and a subcritical fluid.
- ⁇ 2> The method according to ⁇ 1>, wherein at least one of the supercritical fluid and the subcritical fluid is capable of dissolving the toner functional substance without dissolving the toner base particles.
- the formation of the coating layer is carried out by precipitating a toner functional substance dissolved in at least one of a supercritical fluid and a subcritical fluid. 3.
- ⁇ 4> The method for producing a toner according to any one of ⁇ 1> to ⁇ 3>, wherein the formation of the coating layer is performed on any or all of the surface of the toner base particles.
- the toner functional substance is a colorant
- the colorant is formed by contacting at least one of a supercritical fluid and a subcritical fluid, the toner base particles, and the colorant.
- the method for producing the toner according to ⁇ 5> wherein at least one of the supercritical fluid and the subcritical fluid is dissolved by a shear, and a coloring agent is contacted with the toner base particles to color the toner base particles. It is.
- the coating layer forming step is to form a resin coating layer by contacting at least one of a supercritical fluid and a subcritical fluid, the toner base particles, and the resin with the toner functional substance being a resin.
- the toner functional substance is a charge control agent, and at least one of a supercritical fluid and a subcritical fluid is brought into contact with the toner base particles and the charge control agent to coat the charge control agent.
- the toner functional substance is a release agent, and at least one of a supercritical fluid and a subcritical fluid is brought into contact with the toner base particles and the release agent to form a release agent coating layer.
- ⁇ 10> The method for producing a toner according to any one of ⁇ 1> to ⁇ 9>, wherein at least one of the supercritical fluid and the subcritical fluid is a simple substance or a mixture.
- ⁇ 12> The method for producing a toner according to any one of ⁇ 1> to ⁇ 11>, wherein at least one of the supercritical fluid and the subcritical fluid contains an entrainer.
- an electrostatic latent image carrier for forming an electrostatic latent image on the electrostatic latent image carrier, and the toner according to 15>
- developing means for developing a visible image by using the developing means, a transferring means for transferring the visible image to a recording medium, and a fixing means for fixing the transferred image transferred to the recording medium.
- An image forming method comprising at least a developing step of forming, a transferring step of transferring the visible image to a recording medium, and a fixing step of fixing the transferred image transferred to the recording medium.
- the method for producing a toner according to the present invention includes a step of producing toner base particles containing at least resin fine particles, and a step of producing the toner base particles by using at least one of a supercritical fluid and a subcritical fluid. Forming a coating layer by adhering or coating a toner functional substance on the surface of the coating layer.
- a toner functional substance is formed on the surface of the toner base particles by using at least a shear force of the supercritical fluid and the subcritical fluid. To form a coating layer.
- functions such as excellent coloring properties, release properties, and charging performance can be imparted, and a toner with no pinholes and a thin and uniform coating layer can be obtained.
- the coloring property Since the toner of the present invention is produced by the method for producing the toner of the present invention, the coloring property
- the developer of the present invention contains the toner of the present invention, when an image is formed by electrophotography using the developer, a high image quality is obtained with excellent coloring property, releasability and charging performance. A sharp, high-quality image with a high density can be obtained.
- the toner-containing container of the present invention contains the toner of the present invention. Therefore, when an image is formed by electrophotography using the toner contained in the toner-containing container, coloring property, It is excellent in releasability and charging performance, and a high-quality image with high image density and high sharpness can be obtained.
- the process cartridge of the present invention forms an electrostatic latent image carrier and an electrostatic latent image formed on the electrostatic latent image carrier using the toner of the present invention to form a visible image.
- Developing means As a result, it is detachable from the image forming apparatus, is excellent in convenience, and since the toner of the present invention is used, it is excellent in coloring property, releasability, charging performance, etc., and has high image density and sharpness. High quality images can be obtained.
- An image forming apparatus includes an electrostatic latent image carrier, an electrostatic latent image forming unit for forming an electrostatic latent image on the electrostatic latent image carrier, and an Developing means for forming a visible image by developing the image using the toner of the invention; transfer means for transferring the visible image to a recording medium; and fixing means for fixing the transferred image transferred to the recording medium. At least have.
- the electrostatic latent image forming means forms an electrostatic latent image on the electrostatic latent image carrier.
- the developing unit develops the electrostatic latent image using the toner of the present invention to form a visible image.
- the transfer means transfers the visible image to a recording medium.
- the fixing unit fixes the transferred image transferred to the recording medium.
- the image forming method of the present invention includes an electrostatic latent image forming step of forming an electrostatic latent image on an electrostatic latent image carrier, and developing the electrostatic latent image using the toner of the present invention. And a fixing step of fixing the transferred image transferred to the recording medium, and a developing step of transferring the visible image to a recording medium.
- an electrostatic latent image is formed on the electrostatic latent image carrier.
- the developing step the electrostatic latent image is developed using the toner of the present invention to form a visible image.
- the transfer step the visible image is transferred to a recording medium.
- the fixing step the transferred image transferred to the recording medium is fixed. As a result, a sharp, high-quality image with high image density, excellent colorability, releasability, and charging performance can be obtained.
- FIG. 1 is a schematic view showing an example of an apparatus used in a coating layer forming step of the present invention. It is.
- FIG. 2 is a schematic explanatory view showing one example of a process cartridge of the present invention.
- FIG. 3 is a schematic explanatory view showing one example of implementing the image forming method of the present invention by the image forming apparatus of the present invention.
- FIG. 4 is a schematic explanatory view showing another example of implementing the image forming method of the present invention by the image forming apparatus of the present invention.
- FIG. 5 is a schematic explanatory view showing an example in which the image forming method of the present invention is performed by the image forming apparatus (tandem-type color image forming apparatus) of the present invention.
- FIG. 6 is a partially enlarged schematic explanatory view of the image forming apparatus shown in FIG. 5.
- the method for producing a toner of the present invention includes a toner base particle producing step and a coating layer forming step, and further includes other steps appropriately selected as necessary.
- the coating layer forming step preferably includes at least one of a colorant coating layer forming step, a resin coating layer forming step, a charge control agent coating layer forming step, and a release agent coating layer forming step.
- the toner of the present invention is obtained by the method for producing the toner of the present invention.
- the toner base particle manufacturing step is a step of manufacturing toner base particles containing at least resin fine particles.
- the “toner base particles” broadly include other than the final toner, and include not only the resin fine particles themselves but also the resin fine particles themselves with the colorant coating layer, the charge control agent coating layer, and the mold release. This is a concept including at least one of an agent coating layer, a resin coating layer, and another layer.
- the resin fine particles contained in the toner base particles can be appropriately selected depending on the purpose without particular limitation as long as the resin fine particles are used for forming an image.
- fine resin particles obtained by a polymerization method As the polymerization method Is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include a suspension method, an emulsification method, and a dispersion method.
- the toner may be produced by a microencapsulation method (spray dry method, coacervation method, etc.) in addition to the pulverization method and the polymerization method.
- a microencapsulation method spray dry method, coacervation method, etc.
- resin fine particles those appropriately synthesized may be used, or a commercially available product may be used.
- the pulverization method is, for example, a method of producing base particles of the toner by melting and kneading a material containing at least binder resin, and pulverizing and classifying the material.
- the shape may be controlled by applying a mechanical impact force to the obtained toner base particles in order to increase the average circularity of the toner.
- the mechanical impact force can be applied to the toner base particles using a device such as a hybridizer or mechanofusion.
- the resin fine particles obtained by the polymerization method include, for example, vinyl resin, polyurethane resin, epoxy resin, polyester resin, polyamide resin, polyimide resin, silicone resin, phenol resin, Melamine resin, urea resin, aniline resin, ionomer resin, polycarbonate resin, and the like.
- the vinyl resin is a polymer obtained by homopolymerizing or copolymerizing a vinyl monomer.
- styrene (meth) acrylate resin styrene butadiene copolymer, (meth) acrylic acid acrylate And a styrene acrylonitrile copolymer, a styrene maleic anhydride copolymer, and a styrene (meth) atalylic acid copolymer.
- polycondensation resins such as polystyrene, methacrylate, acrylate copolymer, silicone resin, benzoguanamine, nylon, etc. obtained by soap-free emulsion polymerization, suspension polymerization, dispersion polymerization, etc., and thermosetting resins
- the fine resin particles formed by the method described above are suitable because they have a sharp particle size distribution.
- resin fine particles obtained by dispersion polymerization are preferable because they have a sharper particle diameter.
- resin fine particles composed of a polyester resin / polyol resin can be selected. In other words, the resin can be selected in accordance with the design of the target toner base particles.
- the dispersion polymerization method will be specifically described.
- a high molecular compound dispersant that dissolves in the hydrophilic organic liquid is added to the hydrophilic organic liquid, and the polymer dissolves in the hydrophilic liquid, but the resulting polymer swells in the hydrophilic liquid. Or hardly dissolves.
- one or more vinyl monomers are heated to form particles.
- a reaction in which a polymer smaller than the target particle diameter but having a narrow particle size distribution is grown in the above-described system in advance is also included.
- the monomer used for the growth reaction may be the same monomer as that used to produce the seed particles, or another monomer, but the polymer must not be dissolved in the hydrophilic organic liquid.
- the polymer dispersion obtained by such a method can be used as it is in the next coating layer forming step, which contributes to simplification of the manufacturing process.
- the hydrophilic organic liquid a liquid in which a vinyl monomer to be used is dissolved and the obtained resin fine particles (polymer particles) are not dissolved is used.
- the liquid include methyl alcohol, ethyl alcohol, denatured ethyl alcohol, isopropyl alcohol, n-butynoleanolone, isobutynoleanolone, tert-butynoleanolone, sec-butyl alcohol, alcohols such as tert-amyl alcohol, 3-pentanol, octyl alcohol, benzinoleanolone, cyclohexanolone, fuorefurinoreanorenole, ethylene glycol, glycerin, diethylene glycol, etc., methylcellosolve, cellosol , Isopropinoreserosonolev, butinoreserosonolev, ethylene glycolone monomethinoleate, ethylene glycolone monomethino
- One or a mixture of two or more of these organic liquids can be used.
- an organic liquid other than alcohols and ether alcohols in combination with the above-mentioned alcohols and ether alcohols, do not impart solubility to the polymer particles of the organic liquid!
- the organic liquid examples include hexane, Hydrocarbons such as octane, petroleum ether, cyclohexane, benzene, toluene, and xylene; tetrahydrocarbon, trichloroethylene, Halogenated hydrocarbons such as tetrabromoethane; ethers such as ethyl ether, dimethyldaricol, trioxane, and tetrahydrofuran; acetal such as methylal and getyl acetal; acetone, methylethyl ketone, methyl isobutyl ketone, and cyclohexane Esters such as butyl formate, butyl acetate, ethyl ethyl propionate and cellosolve acetate; acids such as
- the polymerization may be performed in the presence of 2 Ca and other inorganic ions. Further, the average particle diameter, particle diameter distribution, drying conditions, and the like of the polymer particles to be produced can be adjusted by changing the type and composition of the mixed solvent at the start of polymerization, during polymerization, and at the end of polymerization, respectively.
- the polymer compound dispersant can be appropriately selected depending on the intended purpose without particular limitation. Examples thereof include acrylic acid, methacrylic acid, ⁇ -cyanoacrylic acid, ⁇ -cyanomethacrylic acid, itaconic acid, and crotonic acid.
- Acid such as phthalic acid, fumaric acid, maleic acid or maleic anhydride; acrylic monomers; butyl alcohol or ethers of butyl alcohol; esters of vinyl alcohol and a compound containing a carboxyl group; acrylamide, methacrylic acid Lilamide, diacetone acrylamide or methylol compounds thereof; acid chlorides such as acrylic acid chloride and methacrylic acid chloride; compounds having a heterocyclic ring; homopolymers of various monomers such as copolymers thereof; Oxyethylene resins, celluloses, and the like.
- the polymer compound dispersant is appropriately selected depending on the hydrophilic organic liquid to be used, the seed of the intended polymer particles, and the production of the seed particles or the production of the grown particles.
- those having high affinity to the polymer particle surface and high absorptivity and high affinity to the hydrophilic organic liquid and high solubility are selected.
- those having a certain length of molecular chain, particularly those having a molecular weight of 10,000 or more are suitable.
- the resulting polymer may have a different probability of precipitation on the particle surface.
- coexistence of the monomers of the polymer compound dispersant described above with the monomers constituting the polymer particles, which are partially intended, is also effective for stabilization.
- the amount of the polymer compound dispersant used in the production of the seed particles varies depending on the type of the monomer for forming the target polymer particles. % By mass is preferred 1 to 5% by mass is more preferred. When the concentration of the polymer compound dispersant is low, the polymer particles formed have a relatively large diameter, and when the concentration is high, small particles can be obtained at a force exceeding 10% by mass. It has little effect on small-diameter dangling.
- the stability of the produced polymer particles and the improvement of the particle size distribution can be further improved.
- the polymerization may be carried out in the presence of these materials in a vinyl monomer solution or seed particle dispersion added for the purpose of preventing coalescence of the particles during the reaction. Initially generated particles are stabilized by the polymer dispersant distributed in the hydrophilic organic liquid and on the polymer particle surface while maintaining equilibrium, but significant amounts of unreacted butyl monomer remain in the hydrophilic organic liquid. If present! ⁇ It swells to a certain extent and has tackiness, and it agglomerates overcoming the steric repulsion of the polymer dispersion stabilizer.
- the amount of the monomer relative to the hydrophilic organic liquid when producing the resin fine particles is not particularly limited, and the force slightly varies depending on the type of the hydrophilic organic liquid.
- the force is preferably 100% by mass or less, more preferably 50% by mass or less. ,.
- the polymerization initiator an ordinary radical initiator soluble in a solvent to be used is used.
- polymerization initiator examples include azo-based polymerization initiators such as 2,2′-azobisisobuty-mouth-tolyl and 2,2′-azobis (2,4-dimethylvalene-tolyl); lauryl A peroxide polymerization initiator such as peroxide, benzoyl peroxide, tert-butyl peroxide, potassium persulfate, etc., or a system in which sodium thiosulfate, amine, etc. are used in combination. Have been.
- azo-based polymerization initiators such as 2,2′-azobisisobuty-mouth-tolyl and 2,2′-azobis (2,4-dimethylvalene-tolyl
- lauryl A peroxide polymerization initiator such as peroxide, benzoyl peroxide, tert-butyl peroxide, potassium persulfate, etc., or a system in which sodium thiosulfate, amine, etc. are used in combination
- the polymerization initiator was added in an amount of 0.1 to 10 parts by mass based on 100 parts by mass of the butyl monomer. Parts are preferred.
- one or more vinyl monomers, a polymerization initiator, etc. are added, and the flow rate is adjusted so that the flow in the reaction tank becomes uniform. While stirring at, heating is performed to a temperature corresponding to the dispersion speed of the polymerization initiator used.
- the temperature at the initial stage of polymerization has a great influence on the particle diameter to be generated, it is preferable to raise the temperature to the polymerization temperature after adding the monomer, and to introduce the polymerization initiator into a small amount of solvent by dissolving.
- an inert gas such as nitrogen gas or argon gas. If the oxygen purge is insufficient, fine particles may be easily generated.
- a polymerization time of 5 to 40 hours is preferable.
- the polymerization rate can be increased by stopping the polymerization at a desired particle size and particle size distribution, adding a polymerization initiator sequentially, or performing the reaction under high pressure.
- the polymerization may be performed in the presence of a compound having a large chain transfer constant!
- the compound having a large chain transfer constant include a low molecular compound having a mercapto group, carbon tetrachloride, carbon tetrabromide, and the like.
- the mass average molecular weight of the resin fine particles is not particularly limited, and can be appropriately selected depending on the purpose. For example, 1,000 or more force S is preferable, and 2,000 to 10,000,000,000 force. More preferred ⁇ , 3,000 to 1,000,000 force still more preferred! /, 0 If the weight average molecular weight force is less than 1,000, hot offset resistance may be poor.
- the glass transition temperature (Tg) of the resin fine particles can be appropriately selected depending on the purpose without particular limitation. For example, 30 to 70 ° C is preferable, and 40 to 65 ° C is more preferable. preferable. If the glass transition temperature (Tg) is less than 30 ° C, the heat-resistant storage stability of the toner may be deteriorated. If it exceeds 70 ° C, the low-temperature fixability may not be sufficient.
- the volume average particle diameter of the resin fine particles is preferably 3-12 m, more preferably 418 m.
- the coating layer forming step uses at least one of a supercritical fluid and a subcritical fluid. Forming a coating layer by adhering or coating the surface of the toner base particles with the toner functional substance.
- the toner functional substance means a substance for exhibiting an electrophotographic developing function, and preferably includes, for example, a colorant, a charge control agent, a release agent, and a coating resin. If necessary, other toner functional substances such as a fluidity improver and a cleaning property improver can be used.
- the coating layer forming step includes: (1) a toner functional substance is a colorant, a colorant coating layer forming step of forming a colorant coating layer, and (2) a toner functional substance is a resin.
- the functional substance is a release agent, and examples include a release agent coating layer forming step of forming a release agent coating layer. The order in which these steps are performed is not particularly limited, and may be appropriately combined. Each coating layer can be formed on the surface of the base particles. Details of each of these steps will be described later.
- the supercritical fluid has an intermediate property between a gas and a liquid, has properties such as a low viscosity at which mass transfer and heat transfer are quick, and has a density and a dielectric constant by changing temperature and pressure. , A fluid whose solubility parameter, free volume, etc. can be continuously and greatly changed. Further, since the supercritical fluid has an extremely small interfacial tension as compared with an organic solvent, it can follow even a minute undulation (surface) and can be wet with the supercritical fluid.
- the supercritical fluid exists as a non-condensable high-density fluid in a temperature and pressure range exceeding a limit (critical point) where gas and liquid can coexist, and does not cause condensation even when compressed.
- a limit critical point
- the fluid can be appropriately selected according to the purpose without particular limitation. However, those having a low critical temperature and critical pressure are preferred.
- the critical fluid exists as a high-pressure liquid in the temperature and pressure regions near the critical point, the critical fluid can be appropriately selected depending on the purpose.
- Examples of the supercritical fluid or subcritical fluid include, for example, carbon monoxide, carbon dioxide, ammonia, nitrogen, water, methanol, ethanol, ethane, propane, 2,3-dimethylbutane, benzene, and chlorine. Mouth trifluoromethane, dimethyl ether and the like are preferred.
- carbon dioxide can easily create a supercritical state with a critical pressure of 7.3 MPa and a critical temperature of 31 ° C, and is nonflammable, inert, easy to handle, and nonaqueous.
- a point force capable of hydrophobizing the surface of the base particles is also particularly preferred.
- the supercritical fluid or the subcritical fluid may be used alone as a single kind or as a mixture of two or more kinds.
- the critical temperature and critical pressure of the supercritical fluid are forces that can be appropriately selected depending on the purpose of the restriction, and the critical temperature is preferably -273-300 ° C. 0-200 ° C is more preferred. In addition, the critical pressure is preferably 5-100 MPa, more preferably 10-50 MPa! / !.
- the properties of the supercritical fluid or the subcritical fluid are positively utilized to form a coating layer (thin film formation, encapsulation, thickness control, etc.) Injection) can be performed.
- At least one of the supercritical fluid and the subcritical fluid can dissolve a toner functional substance that does not dissolve the toner base particles.
- the coating layer is preferably formed by depositing a toner functional substance dissolved in at least one of a supercritical fluid and a subcritical fluid.
- the formation of the coating layer controls the solubility (controlled by temperature and pressure) of the toner functional substance as a solute in a supercritical fluid, and forms a uniform coating layer on the surface of the toner base particles (the surface of the resin fine particles). Formation (deposition) is possible. Specifically, after dissolving or finely dispersing the toner functional substance under the condition that the toner base particles (fine resin particles) do not dissolve, the pressure is reduced to deposit the toner functional substance on the surface of the fine resin particles. It is fixed to form a uniform coating layer.
- the colorant component can be permeated (pressurized injection) into the inside of the toner base particles (the inside of the resin fine particles) and fixed. it can.
- the coloring method using the supercritical fluid can provide high-efficiency coloring and fastness in a short period of time, so that the conventional coloring method cannot be used to produce a toner.
- the toner when the toner is colored later, it can be colored only in the vicinity of the surface and has poor fastness.
- there are various problems such as inefficiency, generation of waste liquid that requires a long processing time, high cost, environmental load, and poor fade resistance.
- the supercritical fluid can be easily separated from the target product and can be recovered and reused, an epoch-making production method that does not use a solvent and has a low environmental load can be realized.
- a fluid that controls the solubility of the toner constituent material is preferable.
- methane, ethane, propane, ethylene and the like are preferably mentioned.
- an entrainer (azeotropic agent) may be added.
- the addition of the entrainer facilitates the formation of the coating layer.
- the end trainer is not particularly limited and may be appropriately selected depending on the purpose.
- a polar organic solvent is preferable.
- the polar organic solvent include methanol, ethanol, propanol, butanol, hexane, tonolen, ethinole acetate, chloroform, dichloromethane, ammonia, melamine, urea, and thioethylene glycol.
- washing and removal aids such as black-mouthed form are particularly preferred because of their high resin solubility.
- the supercritical fluid or the subcritical fluid is also selected from those which can dissolve the material forming the various coating layers without dissolving the resin fine particles.
- a lower alcohol-based solvent which exhibits poor solvent properties at normal temperature and normal pressure with respect to the toner base particles is preferable.
- a toner in which the toner base particles (resin fine particles) to be used do not dissolve or slightly swell, specifically, a solubility parameter [SP value] is used.
- the difference from the [SP value] of the fat fine particles is preferably 1.0 or more, more preferably 2.0 or more.
- alcoholic power such as methanol, ethanol, or n-propanol with a high [SP value] or n-xane or n-heptane with a low [SP value] may be used. preferable.
- the optimal [SP value] difference is preferably 2-5 because the wettability to the particles (resin fine particles) becomes poor and the toner base particles (resin fine particles) cannot be dispersed well.
- the content of the end trainer in the mixed fluid of at least one of the supercritical fluid and the subcritical fluid and the end trainer is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass. preferable. If the content is less than 0.1% by mass, it may be difficult to obtain the effect as an entrainer, and if it exceeds 10% by mass, the properties of the entrainer as a liquid may become strong. And a supercritical or subcritical state may be obtained.
- the toner functional substance is a colorant, and at least one of a supercritical fluid and a subcritical fluid is brought into contact with the toner base particles and the colorant. This is a step of forming a colorant coating layer.
- the colorant dissolved by at least one of the supercritical fluid and the subcritical fluid is brought into contact with the toner base particles to color the toner base particles.
- the colorant can be appropriately selected from known dyes and pigments, which are not particularly limited, depending on the purpose. Examples thereof include carbon black, Niguchi Shin dye, iron black, and naphthyl yellow S , Hansa Yellow (10G, 5G, G), Force Demium Yellow, Yellow Iron Oxide, Loess, Yellow, Titanium Yellow, Polyazo Yellow, Oil Yellow, Hansa Yellow (GR, A, RN, R), Pigment Yellow L , Benzidine Yellow (G, GR), Permanent Yellow (NCG), Balkan Fast Yellow (5G, R), Tartrazine Lake, Quinoline Yellow Lake, Anthrazan Yellow BGL, Isoindolinone Yellow, Bengala, Lead Tan, Lead Zhu , Cadmium Yum Red, Cadmium Eumaki Lily Red, Antimony Vermilion, Permanent Red 4R, Para Red, Faise Red, Pa Lachlor Ortho-Trois-Lin Red, Linole Fast Scarlet G, Brilliant Fast Scarlet, Brilliant Carmine Min BS, Permanent Red (F2R, F4
- a dye is particularly preferably used because it is soluble in at least one of a supercritical fluid and a subcritical fluid.
- the dye can be appropriately selected depending on the purpose without particular limitation.
- CI SOLVENT YELLOW (6, 9, 17, 31, 35, 100, 102, 103, 105)
- C.I.SOLVENT ORANGE (2, 7, 13, 14, 66)
- CI SOLVENT RED (5, 16, 17, 18, 19, 22, 23, 143. 145, 146, 149, 150, 151, 157, 158)
- CI SOL VENT VIOLET 31, 32, 33, 37
- CI SOLVENT BLUE 22, 63, 78, 8 3—86, 191, 194, 195, 104
- CI SOLVENT GREEN 24, 25
- CI S OLVENT BROWN ( 3, 9).
- dyes can be appropriately selected depending on the particular purpose.
- the dye used for dyeing has a ratio [D1] / [D2] between the solubility [D1] in the organic solvent used as the end trainer and the solubility [D2] in the organic solvent capable of dissolving the resin fine particles.
- Any dye may be used as long as it is 0.5 or less, but a disperse dye, an oil-soluble dye and a vat dye are preferable in order to maintain a high powder resistance of the toner after dyeing.
- oil-soluble dyes are preferred.
- several kinds of dyes can be provided according to the coloring. If the resistance is low, the transfer rate may deteriorate.
- toner base particles fine resin particles
- a dye is placed in a pressure-resistant container, and the treatment is performed by the supercritical fluid device.
- the treatment is carried out using a dispersion of the dye in an organic solvent as an end trainer.
- the amount of the colorant to be added is not particularly limited and can be appropriately selected depending on the degree of coloring.
- the amount is preferably 1 to 50 parts by mass with respect to 100 parts by mass of the toner base particles. Parts are more preferred.
- the toner functional substance is resin
- the toner base particles and the resin are contacted with at least one of a supercritical fluid and a subcritical fluid. This is a step of forming a resin coating layer.
- the coating resin for forming the resin coating layer can be appropriately selected according to the purpose without particular limitation.
- examples thereof include polymethyl methacrylate resin, polystyrene, and poly- ⁇ -methino. Restyrene, styrene chlorostyrene copolymer, styrene propylene copolymer, styrene butadiene copolymer, styrene monochloride copolymer, styrene acetate butyl copolymer, styrene maleic acid copolymer, styrene acrylate copolymer Styrene-based resins such as coalescable, styrene-methacrylic acid ester copolymer, styrene ⁇ -chloromethyl acrylate copolymer, styrene acrylonitrile acrylate copolymer; polyester resin, polyol resin, epoxy resin, chloride Bull fat, rosin Modified
- the amount of the coating resin to be added is not particularly limited, and can be appropriately selected depending on the purpose. Force is preferably from 1 to 300 parts by mass to 100 parts by mass of the toner base particles, and more preferably from 10 to 200 parts by mass. .
- the toner functional substance is a charge control agent, and at least one of a supercritical fluid and a subcritical fluid, toner base particles, and a charge control agent To form a charge control agent coating layer.
- the charge control agent can be appropriately selected from publicly known ones having no particular restrictions according to the purpose. However, when a colored material is used, the color tone may change, and therefore, the color control agent is colorless or almost white.
- Preferred materials are, for example, Nig-mouth syn dye, triphenylmethane dye, chromium-containing metal complex dye, molybdate chelate pigment, rhodamine dye, alkoxy-amine, quaternary ammonium salt (fluorine-modified) Quaternary ammonium salts), alkyl amides, phosphorus simple substances or compounds thereof, tungsten simple substances or compounds thereof, fluorine activators, salicylic acid metal salts, salicylic acid derivative metal salts, and the like.
- metal salts of salicylic acid and metal salts of salicylic acid derivatives are preferred. These may be used alone or in combination of two or more.
- the metal is not particularly limited and may be appropriately selected depending on the purpose. Examples thereof include aluminum, zinc, titanium, strontium, boron, silicon, nickel, iron, chromium, and zirconium.
- the charge control agent may be a commercially available product.
- the commercially available product include Bontron P-51 of a quaternary ammonium salt, E-82 of an oxinaphthoic acid-based metal complex, E-84 of salicylic acid-based metal complex, E-89 of phenol-based condensate (from Orient Chemical Co., Ltd.), TP-302 and TP-415 of quaternary ammonium-molybdenum complex Tsuchiya-Dani Gaku Kogyo Co., Ltd.), copy charge of quaternary ammonium salt PSY VP2038, copy blue of triphenylmethane derivative PR, copy charge of quaternary ammonium salt NEG V P2036, copy charge NX VP434 (above, made of hemstone), LRA—901, boron Complexes such as LR-147 (manufactured by Nippon Carlit), quinacridone, azo pigments, and other high molecular
- the amount of the charge control agent to be added can be appropriately selected depending on the particular purpose, but is preferably 0.5 to 5 parts by mass with respect to 100 parts by mass of the toner base particles. Three parts by weight are more preferred. If the amount is less than 0.5 parts by mass, the charging characteristics of the toner may be deteriorated. If the amount exceeds 5 parts by mass, the chargeability of the toner becomes too large, and the main charge control agent The effect of (1) is reduced, the electrostatic attraction with the developing roller is increased, and the fluidity of the developer and the image density may be reduced.
- the toner functional substance is a release agent, and at least one of a supercritical fluid and a subcritical fluid, toner base particles, and a release agent. To form a release agent coating layer.
- the release agent can be appropriately selected from known ones depending on the particular purpose without limitation, and examples thereof include waxes.
- waxes examples include low molecular weight polyolefin waxes, synthetic hydrocarbon waxes, natural waxes, petroleum waxes, higher fatty acids and metal salts thereof, higher fatty acid amides, and various modified waxes thereof. These may be used alone or in combination of two or more.
- low molecular weight polyolefin wax examples include low molecular weight polyethylene wax and low molecular weight polypropylene wax.
- Examples of the synthetic hydrocarbon wax include Fischer-Tropsch wax.
- Examples of the natural waxes include beeswax, carnauba wax, candelilla tus, rice wax, montan wax and the like.
- Examples of the petroleum wax include paraffin wax, microcrystalline wax, and the like.
- the melting point of the release agent is not particularly limited and may be appropriately selected depending on the purpose. However, the melting point is preferably from 40 to 160, and more preferably from 50 to 120 ° C. 90 ° C is particularly preferred.
- the wax may adversely affect the heat-resistant storage stability. If the melting point is more than 160 ° C, a cold offset may easily occur during fixing at a low temperature.
- the paper may be wrapped around the paper.
- the amount of the release agent to be added is not particularly limited and can be appropriately selected depending on the intended purpose. Force is preferably 11 to 20 parts by mass with respect to 100 parts by mass of the toner base particles 3 to 15 parts by mass It is strongly preferred.
- the fluidity improver which is another toner functional substance, is subjected to a surface treatment to increase the hydrophobicity and prevent the flow characteristics and the charge characteristics from being deteriorated even under high humidity.
- a surface treatment to increase the hydrophobicity and prevent the flow characteristics and the charge characteristics from being deteriorated even under high humidity.
- silane coupling agent silylating agent, silane coupling agent having an alkyl fluoride group, organic titanate coupling agent, aluminum coupling agent, silicone oil, modified silicone Oil, and the like.
- the cleaning property improving agent is added to the toner base particles in order to remove a developer after transfer remaining on a photoreceptor or a primary transfer medium.
- a fatty acid metal such as zinc stearate, calcium stearate, and stearic acid is used.
- polymer fine particles produced by soap-free emulsion polymerization such as salts, polymethyl methacrylate fine particles, and polystyrene fine particles.
- the polymer fine particles preferably have a relatively narrow particle size distribution, and have a volume average particle diameter of 0.01 to 1 ⁇ m.
- the formation of the coating layer is preferably performed on any or all of the surface of the toner base particles. In this case, it is possible to selectively form a coating layer according to a desired position on the surface of the toner base particles.
- the method of forming the coating layer is not particularly limited as long as at least one of the supercritical fluid and the subcritical fluid is brought into contact with the toner base particles, and is appropriately selected depending on the purpose. can do.
- the apparatus used for forming the coating layer can be appropriately selected depending on the purpose without particular limitation.
- a coating layer forming process may be performed on the toner base particles.
- An apparatus preferably includes a pressure-resistant container for applying the pressure and a pressure pump for supplying the supercritical fluid.
- the toner base particles are charged into the pressure-resistant container, and the supercritical fluid is supplied into the pressure-resistant container by a pressure pump.
- a coating layer forming material coloring agent, release agent, resin, charge control agent, etc.
- a supercritical fluid containing the charge control agent is discharged. I do.
- the supercritical fluid When the supercritical fluid is returned to normal temperature and normal pressure, the supercritical fluid becomes a gas, so that the solvent does not need to be removed, and the wastewater generated by cleaning the surface of the toner base particles, which has been conventionally required, is not required. Is no longer required, and the burden on the environment is reduced.
- the temperature at which the coating layer is formed can be appropriately selected depending on the purpose without particular limitation as long as it is equal to or higher than the critical temperature of the supercritical fluid or the subcritical fluid to be used.
- the upper limit of the critical temperature is preferably not more than the melting point of the substance forming the toner base particles, and more preferably a temperature at which aggregation such as adhesion between the toner base particles does not occur.
- the lower limit of the critical temperature is preferably a temperature at which the other fluid that can be added to the supercritical fluid exists as a gas.
- the temperature at which the coating layer is formed is preferably from 0 to 100 ° C, more preferably from 20 to 80 ° C. If the temperature exceeds 60 ° C., the toner base particles may be dissolved.
- the pressure at which the coating layer is formed can be appropriately selected depending on the purpose without particular limitation as long as it is equal to or higher than the critical pressure of the supercritical fluid or the subcritical fluid to be used.
- One 60 MPa is preferable.
- FIG. 1000 cm 3 In the coating layer forming apparatus shown in FIG. 1000 cm 3 was used.
- 2 is an end trainer tank
- 4 is a pressurizing pump
- 6 is a temperature sensor
- 113 is an injection nozzle
- 114 is a pressure sensor.
- Dioxygen carbon (CO 2) was used as a gas used as a supercritical fluid. Annular as coating material
- the olefin polymer having a structure was charged into the reaction vessel 9, and resin fine particles as toner base particles were charged.
- carbon dioxide gas was supplied from a gas cylinder 1, pressurized by a pressure pump 3, and introduced into a reaction vessel 9 via a valve 7.
- the valve 5 is closed, and no carbon dioxide gas is introduced into the ejection vessel 112 side.
- the pressure-reducing valve 8 for discharging and jetting is kept closed, and the pressure in the reaction vessel 9 increases due to the introduction of carbon dioxide in a high pressure state.
- the temperature in the reaction vessel 9 was adjusted to 320 K by the heater 117.
- the valves 5 and 7 were adjusted to set the pressure in the reaction vessel 9 to 20 MPa, and the reaction vessel 9 was set to a state in which the olefin polymer having a cyclic structure was dissolved. In this state, the valves 5 and 7 were closed, the dissolved state in the reaction vessel 9 was maintained for 120 minutes, and the supercritical fluid was sufficiently diffused and circulated. After that, the valve 6 was opened, the pressure in the reaction vessel was adjusted to lOMPa, and maintained for 60 minutes.
- the gas was again introduced from the high pressure pump side, and the introduction of the gas was continued while the pressure in the reaction vessel was maintained at lOMPa.
- the supercritical fluid carbon dioxide contained in the mixed solution and the olefin polymer having a cyclic structure dissolved in the supercritical carbon dioxide are shown in the drawing! And further separated into carbon dioxide and an olefin-based copolymer having a cyclic structure by a separation apparatus (not shown), and reused.
- the resin coating layer is formed on the surface of the toner base particles by using at least one of the supercritical fluid and the subcritical fluid.
- the toner of the present invention having excellent charging performance and surface properties can be obtained.
- the shape and size of the toner can be appropriately selected according to the purpose without any particular limitation.
- the image density, average circularity, volume average particle size, and the like are as follows. With the ratio of volume average particle size to number average particle size (volume average particle size Z number average particle size) It's preferable!
- the image density is preferably a density value force of 1.90 or more, more preferably 2.00 or more, measured using a spectrometer (938 light spectrodensitometer manufactured by X-Light). 2. 10 or more is particularly preferred.
- the image density can be determined, for example, by using imagio Neo 450 (manufactured by Ricoh Co., Ltd.) and the amount of developer attached to copying paper (TYPE6000 ⁇ 70W>; manufactured by Ricoh Co., Ltd.) is 1.00 ⁇ 0.05 mg / cm.
- surface temperature of the fixing roller 2 of the solid image was formed by 160 fighters 2 ° C, the image density of any six in the obtained solid image, the spectrometer (X- Rite, 938 scan Bae Kutorode Nshitometa) It can be measured by measuring using a method and calculating the average value.
- the average circularity is a value obtained by dividing the perimeter of an equivalent circle having the same projected area as the shape of the toner by the perimeter of an actual particle, for example, 0.909-0.980 force. , 0.950-0.975 is more preferred.
- the particles having an average circularity of less than 0.94 are 15% or less.
- the average circularity is less than 0.900, satisfactory transferability and high-quality images without dust may not be obtained.
- poor cleaning of the photoreceptor and the transfer belt occurs, and untransferred due to poor paper feed and the like in the case of image formation with a high image area ratio such as a photographic image.
- the toner that has formed the image on the photoreceptor may cause residual toner on the photoreceptor to cause smearing of the accumulated image, or may contaminate a charging roller or the like that contacts and charges the photoreceptor. The original charging ability may not be exhibited.
- the average circularity is determined, for example, by passing a suspension containing toner through a detection band on an imaging unit on a flat plate, optically detecting a particle image with a CCD camera, and analyzing the particle image. It can be measured, for example, using a flow-type particle image analyzer FPIA-2100 (manufactured by Toa Medical Electronics Co., Ltd.).
- FPIA-2100 manufactured by Toa Medical Electronics Co., Ltd.
- the volume average particle diameter of the toner can be appropriately selected depending on the particular purpose, but is preferably, for example, 3 to 8 ⁇ m.
- the toner may be fused to the surface of the carrier due to long-term stirring in the developing device, and the charging ability of the carrier may be reduced. Also, in the case of a one-component developer, filming of the toner on the developing roller and thinning of the toner may easily cause toner fusion to members such as a blade. When the ratio exceeds the above range, it becomes difficult to obtain a high-resolution and high-quality image, and when the balance of toner in the developer is performed, the variation in the particle diameter of the toner may be large.
- volume average particle diameter Z number average particle diameter The ratio of the volume average particle diameter to the number average particle diameter (volume average particle diameter Z number average particle diameter) in the toner is 1.00-1.25 force, 1.10-1 . Preferred over 25 forces!
- volume average particle diameter Z number average particle diameter When the ratio of the volume average particle diameter to the number average particle diameter (volume average particle diameter Z number average particle diameter) exceeds 1.25, the two-component developer causes the carrier In some cases, toner fuses to lower the chargeability of the carrier.In addition, in the case of a one-component developer, the toner is filmed on the developing roller, and the toner is thinned, and the toner is fused to a member such as a blade. May occur, and it may be difficult to obtain a high-resolution and high-quality image, and when the balance of the toner in the developer is performed, the fluctuation of the particle diameter of the toner may increase. is there.
- volume average particle diameter and the ratio of the volume average particle diameter to the number average particle diameter are, for example, a particle size analyzer "Coulter” manufactured by Coulter Electronics Co., Ltd. It can be measured using a counter ⁇ ””.
- the covering layer is formed on the surface of the toner base particles by using at least! / Of the displacement of the supercritical fluid and the subcritical fluid. I do. Then, the coating layer of a coating layer forming material such as a colorant, a release agent, a resin, and a charge control agent is formed on at least the surface of the toner base particles.
- a coating layer forming material such as a colorant, a release agent, a resin, and a charge control agent is formed on at least the surface of the toner base particles.
- the developer of the present invention contains at least the toner of the present invention, and may be a carrier or the like. It contains other components selected.
- the developer may be a one-component developer or a two-component developer. However, when used in a high-speed printer or the like corresponding to an increase in information processing speed in recent years, the life of the developer may be reduced.
- the two-component developer is preferable in terms of improvement and the like.
- the toner particle diameter changes little, so that the toner is filmed on the developing roller, and the toner is thinned. Good and stable developability and an image can be obtained even when the developing device is used for a long time (stirring) in which the toner is not fused to a member such as a blade.
- the toner balance is performed for a long period of time, even when the fluctuation of the toner diameter in the developer is small, even in the long-term stirring in the developing device, Good and stable developability is obtained.
- the carrier is not particularly limited and may be appropriately selected depending on the intended purpose.
- a carrier having a core and a resin layer covering the core is preferable.
- the material of the core material is not particularly limited and may be appropriately selected from known medium strengths.
- a manganese strontium (Mn-Sr) -based material of 50 to 90 emuZg, a manganese magnesium (Mn-Mg) From the viewpoint of securing the image density, which is favored by) -based materials, high magnetic materials such as iron powder (more than 100 emuZg) and magnetite (75-120 emuZg) are preferable.
- a weak magnetic material such as copper zinc (Cu-Zn) (30-80 emuZg) or the like is used. Materials are preferred. These may be used alone or in combination of two or more.
- the core material preferably has a volume average particle size of 10 to 150 m, more preferably 40 to 100 m.
- volume average particle size (D) is less than 10 m
- the amount of fine powder increases, and carrier scattering may occur due to low magnetic per particle, and if it exceeds 150 / zm, the specific surface area may decrease and toner scattering may occur.
- reproduction of a solid portion may be particularly poor.
- the material of the resin layer is not particularly limited and may be selected from known resins according to the purpose. Although it can be selected as appropriate, for example, amino resin, polyvinyl resin, polystyrene resin, halogenated olefin resin, polyester resin, polycarbonate resin, polyethylene resin, polyvinyl fluoride resin , Polyvinylidene fluoride resin, polytrifluoroethylene resin, polyhexafluoropropylene resin, copolymer of vinylidene fluoride and acrylic monomer, copolymer of vinylidene fluoride and vinyl fluoride Examples thereof include polymers, fluoroterpolymers such as terpolymers of tetrafluoroethylene, bilidene fluoride, and non-fluorinated monomers, and silicone resins. These may be used alone or in combination of two or more.
- Examples of the amino resin include urea formaldehyde resin, melamine resin, benzoguanamine resin, urea resin, polyamide resin, and epoxy resin.
- Examples of the polyvinyl resin include: For example, acrylic resin, polymethyl methacrylate resin, polyacrylonitrile resin, polyacetate butyl resin, polybutyl alcohol resin, polybutyl butyral resin and the like can be mentioned.
- Examples of the polystyrene resin include polystyrene resin and styrene acrylic copolymer resin.
- Examples of the halogenated resin include polychlorinated butyl resin.
- Examples of the polyester-based resin include polyethylene terephthalate resin and polybutylene terephthalate resin.
- the resin layer may contain a conductive powder or the like as necessary.
- the conductive powder include metal powder, carbon black, titanium oxide, tin oxide, and zinc oxide. It is possible.
- the average particle size of these conductive powders is preferably 1 m or less. If the average particle diameter exceeds m, it may be difficult to control the electric resistance.
- the resin layer is prepared by, for example, dissolving the silicone resin or the like in a solvent to prepare a coating solution, and then uniformly applying the coating solution to the surface of the core material by a known coating method. After drying, it can be formed by baking.
- the coating method include a dipping method, a spray method, and a brush coating method.
- the solvent is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include toluene, xylene, methyl ethyl ketone, methyl isobutyl ketone, and cellosolve butylacetate.
- the baking may be performed by an external heating method or an internal heating method which is not particularly limited. For example, a fixed electric furnace, a fluid electric furnace, a rotary electric furnace, a burner furnace And the like, a method using a microwave, and the like.
- the amount of the resin layer in the carrier is preferably 0.01 to 5.0% by mass.
- the amount is less than 0.01% by mass, it may not be possible to form a uniform resin layer on the surface of the core material. If the amount exceeds 5.0% by mass, the resin layer may not be formed. May become too thick, and granulation of carriers may occur, and uniform carrier particles may not be obtained.
- the content of the carrier in the two-component developer can be appropriately selected depending on the purpose without particular limitation. — 98% by mass is preferred 93—97% by mass is more preferred
- the developer of the present invention contains the toner, it is possible to stably form a high-quality image with excellent charging performance when forming an image.
- the developer of the present invention can be suitably used for image formation by various known electrophotographic methods such as a magnetic one-component developing method, a non-magnetic one-component developing method, and a two-component developing method. It can be particularly suitably used for a container, a process cartridge, an image forming apparatus and an image forming method.
- the toner-containing container of the present invention contains the toner or the developer of the present invention in a container.
- the container can be appropriately selected from known ones that are not particularly limited.
- a container having a toner-containing container body and a cap is preferably used.
- the size, shape, structure, material, and the like of the toner-containing container body can be appropriately selected depending on the purpose without particular limitation.
- the shape is preferably a cylindrical shape. Spiral irregularities are formed on the inner peripheral surface of the pipe, and the toner as a content can be moved to the discharge port side by rotating, and a part or all of the spiral part has a bellows function. Things, etc. are particularly preferred.
- resin is preferably exemplified, and among them, for example, polyester resin, Preferable examples include polyethylene resin, polypropylene resin, polystyrene resin, polychlorinated vinyl resin, polyacrylic acid, polycarbonate resin, ABS resin, and polyacetal resin.
- the toner-containing container of the present invention is easy to store and transport, has excellent handleability, and is detachably attached to a process cartridge, an image forming apparatus, or the like of the present invention described below, and is suitably used for toner supply. Can be.
- the process cartridge according to the present invention is configured such that an electrostatic latent image carrier for carrying an electrostatic latent image and an electrostatic latent image carried on the electrostatic latent image carrier are developed using a developer to form a visible image. At least a developing means for forming the toner, and other means appropriately selected as necessary.
- the developing means includes: a developer container that stores the toner or the developer according to the present invention; and a developer carrier that supports and transports the toner or the developer stored in the developer container. And a layer thickness regulating member or the like for regulating the thickness of the toner layer to be carried.
- the process cartridge has a built-in photoreceptor 101, and includes a charging unit 102, an exposure unit 103, a developing unit 104, and a cleaning unit 107. And other members.
- the same one as the image forming apparatus described later can be used.
- the charging unit 102 an arbitrary charging member is used.
- the exposure means 103 a light source capable of performing writing with high resolution is used.
- the process cartridge of the present invention can be detachably provided in various electrophotographic apparatuses, and is preferably detachably provided in an electrophotographic apparatus of the present invention described later.
- the image forming method of the present invention includes at least an electrostatic latent image forming step, a developing step, a transferring step, and a fixing step, and further includes other steps appropriately selected as needed, for example, a charge removing step. Process, cleaning process, recycling process, control process, etc.
- the image forming apparatus of the present invention includes at least an electrostatic latent image carrier, an electrostatic latent image forming unit, a developing unit, a transfer unit, and a fixing unit, and further appropriately selected as necessary. It has other means, for example, a charge removing means, a cleaning means, a recycling means, a control means and the like.
- the electrostatic latent image forming step is a step of forming an electrostatic latent image on the electrostatic latent image carrier.
- the electrostatic latent image carrier (“photoconductive insulator”, “photoconductor”)
- the material, shape, structure, size, and the like can be appropriately selected from known materials having no particular restrictions, and the shape is preferably a drum shape.
- the material include an inorganic photoreceptor such as amorphous silicon and selenium, and an organic photoreceptor such as polysilane and phthaloboromethine. Among these, amorphous silicon is preferred from the viewpoint of long life.
- the formation of the electrostatic latent image can be performed, for example, by uniformly charging the surface of the electrostatic latent image carrier and then exposing it imagewise. This can be done by means.
- the electrostatic latent image forming means includes, for example, a charger for uniformly charging the surface of the electrostatic latent image carrier and an exposing device for exposing the surface of the electrostatic latent image carrier imagewise. At least prepare.
- the charging can be performed, for example, by applying a voltage to the surface of the electrostatic latent image carrier using the charger.
- the charging device can be appropriately selected according to the purpose to which there is no particular limitation.
- a known contact charging device including a conductive or semiconductive roll, a brush, a film, a rubber blade, or the like.
- the exposure can be performed, for example, by exposing the surface of the electrostatic latent image carrier imagewise using the exposure device.
- the surface of the electrostatic latent image carrier charged by the charger is there is no particular limitation as long as the image to be formed can be exposed.
- a force that can be appropriately selected according to the purpose For example, a copying optical system, a rod lens array system, a laser optical system, a liquid crystal optical system, etc. Of various exposure devices.
- a light-back type in which imagewise exposure is performed from the back side of the electrostatic latent image carrier may be adopted.
- the developing step is a step of developing the electrostatic latent image using the toner or the developer of the present invention to form a visible image.
- the visible image can be formed, for example, by developing the electrostatic latent image using the toner or the developing agent of the present invention, and can be performed by the developing unit.
- the toner or the developer of the present invention can be appropriately selected from known ones without any particular limitation. It is preferable to include a developing device which accommodates the toner or the developing agent on the electrostatic latent image and which can apply the toner or the developing agent in a contact or non-contact manner. And the like are more preferable.
- the developing device may be of a dry developing type, may be of a wet developing type, may be a single-color developing device, or may be a multi-color developing device.
- a preferable example includes a stirrer for charging the toner or the developer by frictionally stirring the toner or the developer and a rotatable magnet roller.
- the toner and the carrier are mixed and agitated, and the toner is charged by friction at that time, and is held on the surface of a rotating magnet roller in a spike state. Is formed. Since the magnet roller is disposed near the electrostatic latent image carrier (photoconductor), a part of the toner constituting the magnetic brush formed on the surface of the magnet roller is electrically charged.
- the electrostatic latent image carrier (photoreceptor) is moved to the surface by an appropriate suction force. As a result, the electrostatic latent image is developed by the toner, and a visible image is formed by the toner on the surface of the electrostatic latent image carrier (photoconductor).
- the developer contained in the developing device is a developer containing the toner of the present invention
- the developer may be a one-component developer or a two-component developer.
- the toner contained in the developer is the toner of the present invention.
- the transfer step is a step of transferring the visible image to a recording medium. After a primary transfer of the visible image onto the intermediate transfer body using an intermediate transfer body, the visible image is transferred onto the recording medium.
- the transfer can be performed, for example, by charging the electrostatic latent image carrier (photosensitive material) using a transfer charger, and can be performed by the transfer unit.
- the transfer means includes a primary transfer means for transferring a visible image onto an intermediate transfer member to form a composite transfer image, and a secondary transfer means for transferring the composite transfer image onto a recording medium. Such an embodiment is preferred.
- a known intermediate force of the transfer member can be appropriately selected according to the purpose of the present invention.
- a transfer belt is preferably used.
- the transfer unit (the primary transfer unit and the secondary transfer unit) transfers the visible image formed on the electrostatic latent image carrier (photoconductor) to the recording medium side. It is preferable to have at least a transfer device for peeling and charging.
- the number of the transfer means may be one, or two or more.
- Examples of the transfer device include a corona transfer device using corona discharge, a transfer belt, a transfer roller, a pressure transfer roller, and an adhesive transfer device.
- the recording medium is not particularly limited, and may be appropriately selected from known recording media (recording paper).
- the fixing step is a step of fixing the visible image transferred to the recording medium using a fixing device.
- the fixing step may be performed each time the toner of each color is transferred to the recording medium. It may be performed simultaneously at a time in a state where the toner is stacked on the toner.
- the fixing device can be appropriately selected depending on the purpose without particular limitation.
- iS Known heating and pressurizing means are suitable.
- Examples of the heating / pressing unit include a combination of a heating roller and a pressing roller, and a combination of a heating roller, a pressing roller, and an endless belt.
- the heating by the heating and pressurizing means is preferably performed at 80 ° C to 200 ° C.
- a known optical fixing device may be used together with or instead of the fixing step and the fixing means.
- the static elimination step is a step of applying a static elimination bias to the electrostatic latent image carrier to eliminate static, and can be suitably performed by a static elimination unit.
- the static elimination means can be appropriately selected from known static eliminators as long as a static elimination bias can be applied to the electrostatic latent image carrier, which is not particularly limited.
- a static elimination lamp or the like can be used. Are preferred.
- the cleaning step is a step of removing the electrophotographic toner remaining on the electrostatic latent image carrier, and can be suitably performed by a cleaning unit.
- the cleaning unit can be appropriately selected from known cleaners that can remove the electrophotographic toner remaining on the electrostatic latent image carrier, which is not particularly limited.
- cleaners that can remove the electrophotographic toner remaining on the electrostatic latent image carrier, which is not particularly limited.
- Preferable examples include a brush cleaner, an electrostatic brush cleaner, a magnetic roller cleaner, a blade cleaner, a brush cleaner, and a web cleaner.
- the recycling step is a step of recycling the electrophotographic color toner removed in the cleaning step to the developing unit, and can be suitably performed by the recycling unit.
- Examples of the recycling means include known transportation means and the like which are not particularly limited.
- the control means is a step of controlling each of the steps, and can be suitably performed by the control means.
- the control means is not particularly limited as long as the movement of each means can be controlled, and can be appropriately selected depending on the purpose. Examples thereof include devices such as a sequencer and a computer.
- FIG. 1 A photoreceptor drum 10 (hereinafter referred to as “photoreceptor 10” t) as a carrier, a charging roller 20 as the charging unit, an exposing device 30 as the exposing unit, and a developing device as the developing unit 40, an intermediate transfer body 50, a cleaning device 60 having a cleaning blade as the cleaning means, and a charge removing lamp 70 as the charge removing means.
- photoreceptor 10 hereinafter referred to as “photoreceptor 10” t
- photoreceptor 10 as a carrier
- charging roller 20 as the charging unit
- an exposing device 30 as the exposing unit
- a developing device as the developing unit 40
- intermediate transfer body 50 an intermediate transfer body 50
- cleaning device 60 having a cleaning blade as the cleaning means
- a charge removing lamp 70 as the charge removing means.
- the intermediate transfer member 50 is an endless belt, and is designed to be movable in the direction of the arrow by three rollers 51 which are disposed inside and stretch the belt. Part of the three rollers 51 also functions as a transfer bias roller capable of applying a predetermined transfer bias (primary transfer bias) to the intermediate transfer member 50.
- the intermediate transfer body 50 is provided with a cleaning device 90 having a cleaning blade in the vicinity of the intermediate transfer body 50.
- the cleaning device 90 transfers a developed image (toner image) to a transfer paper 95 as a final transfer material (secondary transfer).
- a transfer roller 80 serving as the transfer means to which a transfer bias can be applied is arranged to face each other.
- a corona charger 58 for applying a charge to the toner image on the intermediate transfer member 50 is provided between the photosensitive member 10 and the intermediate transfer member 50 in the rotation direction of the intermediate transfer member 50. It is arranged between the contact portion and the contact portion between the intermediate transfer body 50 and the transfer paper 95.
- the developing device 40 includes a developing belt 41 as the developer carrying member, a black developing unit 45K, a yellow developing unit 45 °, a magenta developing unit 45 °, and a cyan developing unit 45C provided around the developing belt 41. It is composed of power.
- the black developing unit 45 ⁇ has a developer accommodating section 42 ⁇ , a developer supply roller 43 ⁇ and a developing roller 44 ⁇
- the yellow developing unit 45 ⁇ has a developer accommodating section 42 ⁇ and a developer supplying roller 43 ⁇ .
- the magenta developing unit 45 ⁇ includes a developer accommodating section 42 ⁇ , a developer supply roller 43 ⁇ , and a developing roller 44 ⁇
- the cyan developing unit 45C includes a developer accommodating section 42C and a developer.
- a supply roller 43C and a developing roller 44C are provided.
- the developing belt 41 is an endless belt, is rotatably stretched around a plurality of belt rollers, and a part thereof comes into contact with the photoconductor 10.
- the charging roller 20 uniformly charges the photosensitive drum 10.
- the exposure device 30 performs imagewise exposure on the photosensitive drum 10 to form an electrostatic latent image.
- the electrostatic latent image formed on the photosensitive drum 10 is developed by supplying toner from the developing device 40 to form a visible image (toner image).
- the visible image (toner image) is The force is also transferred onto the intermediate transfer member 50 (primary transfer) by the applied voltage, and further transferred onto the transfer paper 95 (secondary transfer). As a result, a transfer image is formed on the transfer paper 95.
- the residual toner on the photoconductor 10 is removed by the cleaning device 60, and the charge on the photoconductor 10 is removed by the discharging lamp 70.
- FIG. 4 Another embodiment in which the image forming method of the present invention is performed by the image forming apparatus of the present invention will be described with reference to FIG.
- the image forming apparatus 100 shown in FIG. 4 is different from the image forming apparatus 100 shown in FIG. 3 in that a black developing unit 45K, a yellow developing unit 45 ⁇ , a magenta developing unit 45 ⁇ Except that the developing unit 45C is disposed directly opposite to the developing unit 45C, the developing unit 45C has the same configuration as the image forming apparatus 100 shown in FIG.
- the same components as those in FIG. 3 are denoted by the same reference numerals.
- the tandem image forming apparatus 120 shown in FIG. 5 is a tandem type color image forming apparatus.
- the tandem image forming apparatus 120 includes a copying apparatus main body 150, a sheet feeding table 200, a scanner 300, and an automatic document feeder (ADF) 400.
- ADF automatic document feeder
- An endless belt-shaped intermediate transfer body 50 is provided at the center of the copying apparatus main body 150.
- the intermediate transfer member 50 is stretched around support rollers 14, 15, and 16, and is rotatable clockwise in FIG.
- An intermediate transfer body cleaning device 17 for removing residual toner on the intermediate transfer body 50 is disposed near the support roller 15.
- a mold developing device 120 is provided.
- An exposing device 21 is arranged near the tandem developing device 120.
- the secondary transfer device 22 is disposed on the side of the intermediate transfer member 50 opposite to the side on which the tandem developing device 120 is disposed.
- a secondary transfer belt 24 which is an endless belt, is stretched around a pair of rollers 23, and the transfer paper conveyed on the secondary transfer belt 24 and the intermediate transfer body 50 are different from each other. They can contact each other.
- a fixing device 25 is arranged near the secondary transfer device 22.
- the fixing device 25 The image forming apparatus includes a fixing belt 26 which is an endless belt, and a pressure roller 27 which is arranged to be pressed by the fixing belt 26.
- a sheet reversing device 28 for reversing the transfer paper to form an image on both sides of the transfer paper is disposed near the secondary transfer device 22 and the fixing device 25. Tepuru.
- each image forming unit 18 black image forming unit, yellow image forming unit, magenta image forming unit, and cyan image forming unit
- Image forming means black, yellow, magenta and cyan toner images are formed in each image forming means. That is, as shown in FIG. 6, each of the image forming units 18 (black image forming unit, yellow image forming unit, magenta image forming unit, and cyan image forming unit) in the tandem type developing device 120 are respectively exposed to light.
- Body 10 black photosensitive body 10K, yellow photosensitive body 10 ⁇ , magenta photosensitive body 10M and cyan photosensitive body 10C
- a charger 60 for uniformly charging the photosensitive body, and a color image information.
- An exposure device for exposing the photoconductor to an image corresponding to each color image (L in FIG. 6) to form an electrostatic latent image corresponding to each color image on the photoconductor; Develop using each color toner (black toner, yellow toner, magenta toner and cyan toner)
- a developing device 61 for forming a toner image by the following method, a transfer charger 62 for transferring the toner image onto the intermediate transfer member 50, a photosensitive member cleaning device 63, and a static eliminator 64 are provided.
- a single-color image (black image, yellow image, magenta image, and cyan image) can be formed based on the color image information.
- the black image, the yellow image, the magenta image, and the cyan image thus formed are formed on the black photoreceptor 10K, respectively, on the intermediate transfer member 50 that is rotated by the support rollers 14, 15 and 16.
- the black image, the yellow image formed on the yellow photoconductor 10Y, the magenta image formed on the magenta photoconductor 10M, and the cyan image formed on the cyan photoconductor 10C are sequentially transferred (primary Transcription). Then, the black image, the yellow image, the magenta image, and the cyan image are superimposed on the intermediate transfer member 50 to form a composite color image (color transfer image).
- one of the paper feed rollers 142 is selectively rotated, and the paper (recording paper) is fed out by the force of the paper feed cassette 144 provided in the paper bank 143 in multiple stages.
- the sheet is separated one by one by a separation roller 145 and sent out to a sheet feeding path 146, conveyed by a conveying roller 147, guided to a sheet feeding path 148 in the copier body 150, and stopped against the registration roller 49.
- rotate the paper feed roller 150 to feed out the sheets (recording paper) on the manual feed tray 51, separate them one by one with the separation roller 52, enter the manual paper feed path 53, and abut the registration roller 49 in the same manner. Stop.
- the registration roller 49 may be used in a state where a bias is applied to remove paper dust from a force sheet that is generally used while grounded. Then, the registration roller 49 is rotated in synchronization with the composite color image (color transfer image) synthesized on the intermediate transfer member 50, and a sheet (recording paper) is interposed between the intermediate transfer member 50 and the secondary transfer device 22. ) And the secondary transfer device 22 transfers (secondary transfer) the composite color image (color transfer image) onto the sheet (recording paper), thereby forming a color image on the sheet (recording paper). Is transferred and formed. The residual toner on the intermediate transfer member 50 after the image transfer is cleaned by the intermediate transfer member tallying device 17.
- the sheet (recording paper) on which the color image has been transferred is conveyed by the secondary transfer device 22 and sent out to the fixing device 25, where the synthesizing is performed by heat and pressure in the fixing device 25.
- the color image (color transfer image) is fixed on the sheet (recording paper).
- the sheet (recording paper) is switched by the switching claw 55 and discharged by the discharge roller 56 and stacked on the discharge tray 57, or switched by the switching claw 55 and inverted by the sheet reversing device 28 to return to the transfer position. After being guided and recording an image on the back side, the sheet is discharged by discharge rollers 56 and stacked on a discharge tray 57.
- the toner of the present invention which is excellent in coloring property, releasability, charging performance and surface properties, is used, so that a high-quality image can be efficiently obtained.
- Tg glass transition temperature
- TK homomixer manufactured by Tokushu Kika Co., Ltd.
- aqueous solution obtained by dissolving 9.8 parts by mass of ion-exchanged water in 250 parts by mass of ion-exchanged water add 50 parts by mass of ion-exchanged water to sodium hydroxide (alcohol hydroxide).
- An aqueous solution obtained by dissolving 6.9 parts by mass of potassium metal was gradually added under stirring to prepare a dispersion of magnesium hydroxide colloid (a colloid of a poorly water-soluble metal compound).
- the obtained polymerizable monomer composition for core was added to and mixed with the obtained magnesium hydroxide colloidal dispersion liquid, and then 4 parts by mass of tert-butylbaoxy-2-ethylhexanoate was added.
- Droplets of the polymerizable monomer composition for the core were granulated by high-shear stirring at 110 rpm using a mixer.
- the aqueous dispersion of the granulated monomer composition was placed in a polymerization reactor equipped with a stirring blade, and the polymerization reaction was started at 90 ° C.
- the processing system was kept in a closed state (for example, all valves were closed), and the carbon dioxide gas was sent to the processing cell (for example, the valve for sending the carbon dioxide gas was opened, and I sent carbon gas). Subsequently, a carbon dioxide gas was fed, and the system (inside the processing cell) was pressurized until it reached an operating pressure.
- the inside of the processing cell was stirred by a stirring motor, the rotation speed of the stirring shaft was adjusted by a digital rotation indicator, and the flow rate was 5.0 LZmin (converted to standard conditions), 70 ° C, 40.52 MPa (400 atm), and 5 hours.
- the diacid Carbon was allowed to flow, and a coating layer of the charge control agent was formed on the surface of the toner to prepare Toner 1. The formation of the coating layer was performed for 30 minutes.
- the carbon dioxide in which the charge control agent was dissolved in the processing cell was replaced with a supercritical carbon dioxide fluid containing no dissolved substance, and the pressure was returned to normal pressure.
- the toner was taken out from the inside.
- the toner thus obtained does not require a drying treatment, a washing treatment, or the like, and after the coating layer forming step, the pressure in the reaction vessel containing the supercritical fluid is reduced to reduce the amount of dioxin.
- the process is completed only by degassing the carbon. For this reason, the toner can be efficiently manufactured in an extremely short time, the treatment of the waste liquid is not required, and the burden on the environment is reduced.
- Comparative toner 1 was prepared in the same manner as in Example 1 except that the coating layer forming step was not performed.
- a sealable reaction vessel equipped with a stirring blade, a cooling condenser, and a nitrogen gas inlet tube was installed in a thermostatic water bath. 70 parts by mass of ethanol, 30 parts by mass of distilled water, and 4 parts by mass of polyvinylpyrrolidone were charged into the reaction vessel, and the polyvinylpyrrolidone was completely dissolved by rotating a stirring blade.
- reaction vessel 28 parts by mass of styrene, 10 parts by mass of ethyl phthalate, 2 parts by mass of n-butyl methacrylate, 0.2 parts by mass of ethylene glycol dimethacrylate, 0.03 parts by mass of carbon tetrachloride, And 0.6 parts by mass of dibenzoyl peroxy acid.
- nitrogen gas was blown into the reaction vessel to complete the reaction.
- the temperature in the water tank was raised to 50 ⁇ 0.1 ° C. to start the polymerization. Two hours later, the temperature inside the water tank was raised to 65 ⁇ 0.1 ° C, and the reaction speed was increased.
- the mixture was cooled to room temperature to obtain a dispersion.
- the polymerization rate exceeded 90%.
- the particle size distribution was measured using a Coulter Multisizer (100 m aperture), and the toner base particles having a volume average particle size of 6.83 ⁇ m, a number average particle size of 6.04 ⁇ m, and a ratio of 1.131 were measured. 2 (resin fine particles 2) was obtained.
- dioxygenated carbon was selected as a supercritical fluid, and the dioxygenated carbon was supplied into the processing cell by a supply cylinder, the upper limit pressure was adjusted by a pressure valve, and the temperature was controlled by a temperature controller. Controlled to ⁇ 0.5K.
- the protection tube was controlled at 350.15 ⁇ 0.5K.
- the processing system was kept in a closed state (for example, all valves were closed), and the carbon dioxide gas was sent to the processing cell (for example, the valve for sending the carbon dioxide was opened, Carbon gas).
- the processing system was kept closed (for example, all valves were closed), and the gas was sent to the processing cell (for example, the valve for sending the gas was opened, and Carbon dioxide gas was sent). Subsequently, a carbon dioxide gas was fed and pressurized until the system (in the processing cell) reached the operating pressure.
- the inside of the processing cell was stirred by a stirring motor, and the rotation speed of the stirring shaft was adjusted by a digital tachometer. 70 ° C, 40.52MPa (400 atm), 3 hours treatment, 35 ° C, 31MPa treatment for 1 hour, flow rate 5.
- toner base particles 2b resin fine particles 2b
- a charge control agent manufactured by Clariant Japan, Copy Charge PSY
- ethanol purity: 99.5% or more
- dioxygen carbon was selected as a supercritical fluid
- the dioxygen carbon was supplied into the treatment cell by a supply cylinder, and the upper limit pressure was adjusted by a pressure valve. Controlled to ⁇ 0.5K.
- the protection tube was controlled at 350.15 ⁇ 0.5K.
- the processing system was kept closed (e.g., all valves were closed) and the dioxinated carbon gas was sent to the processing cell (e.g., the valve for sending dioxinated carbon gas was opened. Diacid carbon gas was sent). Subsequently, a carbon dioxide gas was fed, and the system was pressurized until the system (in the processing cell) reached the operating pressure.
- the inside of the processing cell was stirred by a stirring motor, the rotation speed of the stirring shaft was adjusted by a digital tachometer, and the flow rate was 5.0 LZmin (converted to standard conditions), 70 ° C, 40.52 MPa (400 atm), 5 hours.
- the carbon dioxide in a supercritical state is circulated, and the toner base particles 2c (the resin fine particles 2c) in which the coating layer of the charge control agent is formed on the surface of the toner base particles 2b (the resin fine particles 2b).
- the toner base particles 2c the resin fine particles 2c
- the coating layer of the charge control agent is formed on the surface of the toner base particles 2b (the resin fine particles 2b).
- Step of forming one colorant coating layer 12 parts by mass of solvent black and 100 parts by mass of toner base particles 2c (resin fine particles 2c) were filled in the treatment cell.
- dioxygen carbon was selected as a supercritical fluid, the dioxygen carbon was supplied into the treatment cell by a supply cylinder, the upper limit pressure was adjusted by a pressure valve, and 313. It was controlled to 15 ⁇ 0.5K.
- the protection tube was controlled at 350.15 ⁇ 0.5K.
- the processing system was kept closed (for example, all valves were closed), and the carbon dioxide gas was sent to the processing cell (for example, the valve for sending carbon dioxide gas was opened, and Dani carbon gas was sent).
- the toner 2 thus obtained does not require a drying treatment, a washing treatment, etc., and after forming the coating layer and the coloring layer, the pressure in the reaction vessel containing the supercritical fluid is reduced by reducing the pressure.
- the process is completed only by degassing the carbon dioxide. Therefore, the toner can be efficiently manufactured in a very short time, and the treatment of the waste liquid becomes unnecessary, and the burden on the environment is reduced.
- Toner 3 was produced in the same manner as in Example 2, except that the step of forming the colorant coating layer in Example 2 was changed as follows.
- the inside of the treatment cell was stirred by a stirring motor, the rotation speed of the stirring shaft was adjusted by a digital tachometer, and the flow rate was 5.0 LZmin (converted to standard condition), 70 ° C, 40.52 MPa (400 atm), Under the treatment conditions of 5 hours, the carbon dioxide in a supercritical state was passed, and the toner base particles 2c (resin fine particles 2c) prepared in Example 2 were dyed to prepare a toner 3.
- the obtained toner 3 does not require drying treatment, washing treatment, etc., and after the coating layer forming and dyeing steps, degass the carbon dioxide by depressurizing the reaction vessel containing the supercritical fluid. Just complete the process. For this reason, the toner can be efficiently manufactured in an extremely short time, and the treatment of the waste liquid becomes unnecessary, and the burden on the environment is reduced.
- Example 2 the step of forming the charge control agent coating layer of Example 2 was performed using the toner base particles 2a (resin fine particles 2a) prepared in Example 2 without performing the resin coating layer forming step.
- a toner base particle 2d (a resin fine particle 2d) having no resin coating layer was prepared.
- toner base particles 2d fine resin particles 2d
- toner base particles 2c fine resin particles 2c
- dyes shown in Table 1 below were used.
- a toner 416 was prepared in the same manner as in Example 2 except that the dyeing conditions were changed.
- Example 2 a toner 7 was produced in the same manner as in Example 2, except that the step of forming the charge control agent coating layer was changed as described below. Formation process of charge control agent coating layer
- TN-105 a zirconium salicylate compound manufactured by Hodogaya-Danigaku Co., Ltd.
- 10 parts by mass of toner base particles 2b (fine resin particles 2b) produced in Example 2 was charged into a treatment cell, and 100 ml of ethanol (purity: 99.5% or more) was added as a co-solvent.
- dioxygen carbon was selected as a supercritical fluid, the carbon dioxide was supplied into the treatment cell by a supply cylinder, the upper limit pressure was adjusted by a pressure valve, and the temperature controller was set to 313.15 ⁇ 0. Controlled to 5K.
- the protection tube was controlled at 350.15 ⁇ 9.5K.
- the processing system was kept in a closed state (for example, all valves were closed), and the carbon dioxide gas was sent to the processing cell (for example, the valve for sending the carbon dioxide gas was opened, and I sent carbon gas). Subsequently, a carbon dioxide gas was fed, and the system (inside the processing cell) was pressurized until it reached an operating pressure.
- the inside of the processing cell is stirred by a stirring motor, the rotation speed of the stirring shaft is adjusted by a digital rotation indicator, and the flow rate is 5.
- Example 2 Toner 8 was produced in the same manner as in Example 2, except that the step of forming the charge control agent coating layer was changed as described below.
- E-84 a zinc salt of salicylate, manufactured by Hodogaya-Danigaku Co., Ltd.
- 10 parts by mass of toner base particles 2b (resin fine particles 2b) produced in Example 2 was charged into a treatment cell, and 100 ml of ethanol (purity: 99.5% or more) was added as a co-solvent.
- dioxygen carbon was selected as a supercritical fluid, the carbon dioxide was supplied into the treatment cell by a supply cylinder, the upper limit pressure was adjusted by a pressure valve, and 313.15 ⁇ 0 by a temperature controller. Controlled to 5K.
- the protection tube was controlled at 350.15 ⁇ 0.5K.
- the processing system is kept closed (for example, all valves are closed) and the processing cell (For example, the valve for sending the gas was sent and the gas was sent). Subsequently, a carbon dioxide gas was fed, and the system (inside the processing cell) was pressurized until it reached an operating pressure.
- the inside of the processing cell is stirred by a stirring motor, the rotation speed of the stirring shaft is adjusted by a digital rotation indicator, and the flow rate is 5.
- Comparative toner was prepared in the same manner as in Example 2 except that the forming step of the colorant coating layer in the coating layer forming step was performed without using a supercritical fluid in the following manner. 2 was produced.
- the obtained toner 2-8 and comparative toner 2 were mixed with 100 parts by mass of 0.7 parts by mass of hydrophobic silica and 0.3 parts by mass of hydrophobic titanium oxide in a Henschel mixer. Next, a developer 2-8 composed of 5% by mass of the toner treated with the external additive and 95% by mass of a copper-zinc ferrite carrier coated with silicone resin and having a volume average particle diameter of 40 ⁇ m was used. Comparative developer 2 was prepared. The toner used in the developer 2-8 and the comparative developer 2 corresponds to the toner 2-8 and the comparative toner 2 in order.
- a copy paper (TYPE6000 ⁇ 7OW>, TYPE6000 ⁇ 7OW>, tandem type color electronic photographing device (imagio Neo450, manufactured by Ricoh Co., Ltd.) was used for each of the obtained developers of Examples 2-8 and Comparative Example 2. (Ricoh Co., Ltd.) to form a solid image having an adhesion amount of each developer of 1.00 ⁇ 0.05 mgZcm 2 .
- the formation of the solid image was repeatedly performed on 8000 sheets of the copy paper.
- the image density of the obtained solid image was visually observed at the initial stage and after 8,000 sheets of durability, and evaluated based on the following criteria.
- Example 1 and Comparative Example 1 were evaluated in the same manner as described above using a non-magnetic one-component developing system laser printer (manufactured by Kyocera Mita, DP-560). Note that the higher the obtained image density, the higher the density of an image can be formed. This evaluation is equivalent to the embodiment of the toner container, the process cartridge, and the image forming method of the present invention.
- ⁇ A force that was not observed to fuse the developer to the photoreceptor.
- the method for producing a toner of the present invention has a small burden on the environment. Further, the toner of the present invention produced by the method is excellent in colorability, releasability, charging performance, surface properties, and the like, and thus is suitably used for high-quality image formation.
- the developer, toner-containing container, image forming method, and process cartridge of the present invention using the toner of the present invention are suitably used for high-quality image formation.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/522,936 US7354690B2 (en) | 2004-03-19 | 2006-09-19 | Toner and method for producing the same, and, developer, toner-containing container, process cartridge, image forming apparatus and image forming method |
US11/939,075 US7575842B2 (en) | 2004-03-19 | 2007-11-13 | Toner and, developer, toner-containing container, process cartridge, image forming apparatus and image forming method |
Applications Claiming Priority (6)
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JP2004081757 | 2004-03-19 | ||
JP2004-081757 | 2004-03-19 | ||
JP2004178556 | 2004-06-16 | ||
JP2004-178556 | 2004-06-16 | ||
JP2005-072991 | 2005-03-15 | ||
JP2005072991A JP4676223B2 (ja) | 2004-03-19 | 2005-03-15 | トナー及びその製造方法、並びに、現像剤、トナー入り容器、プロセスカートリッジ、画像形成装置及び画像形成方法 |
Related Child Applications (3)
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US10/522,936 A-371-Of-International US20060248627A1 (en) | 2002-07-30 | 2003-07-30 | Mining vest |
US11/522,936 Continuation US7354690B2 (en) | 2004-03-19 | 2006-09-19 | Toner and method for producing the same, and, developer, toner-containing container, process cartridge, image forming apparatus and image forming method |
US11/939,075 Division US7575842B2 (en) | 2004-03-19 | 2007-11-13 | Toner and, developer, toner-containing container, process cartridge, image forming apparatus and image forming method |
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WO2005091082A1 true WO2005091082A1 (ja) | 2005-09-29 |
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PCT/JP2005/004754 WO2005091082A1 (ja) | 2004-03-19 | 2005-03-17 | トナー及びその製造方法、並びに、現像剤、トナー入り容器、プロセスカートリッジ、画像形成装置及び画像形成方法 |
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WO (1) | WO2005091082A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007256941A (ja) * | 2006-02-27 | 2007-10-04 | Ricoh Co Ltd | トナー及びその製造方法 |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070202427A1 (en) * | 2006-02-27 | 2007-08-30 | Chiaki Tanaka | Toner, method for preparing the toner, developer including the toner, and image forming method and apparatus and process cartridge using the toner |
JP2007233221A (ja) * | 2006-03-03 | 2007-09-13 | Konica Minolta Business Technologies Inc | 静電荷像現像用トナーおよび画像形成方法 |
US20070275315A1 (en) * | 2006-05-23 | 2007-11-29 | Tsuneyasu Nagatomo | Toner, method for manufacturingthe toner, and developer, image forming method, image forming apparatus and process cartridge using the toner |
US8043778B2 (en) * | 2006-09-15 | 2011-10-25 | Ricoh Company Limited | Toner, method for preparing the toner, and image forming apparatus using the toner |
EP1903403B1 (en) * | 2006-09-19 | 2015-11-04 | Ricoh Company, Ltd. | Image forming apparatus and process cartridge |
JP5223382B2 (ja) * | 2007-03-15 | 2013-06-26 | 株式会社リコー | 静電潜像現像トナー用の有機シリコーン微粒子、トナー用外添剤、静電荷像現像用トナー、静電荷像現像用現像剤、画像形成方法、及びプロセスカートリッジ |
US7923517B2 (en) | 2007-11-09 | 2011-04-12 | Ricoh Company, Ltd. | Polymer microparticles and production method for the same |
JP5157733B2 (ja) | 2008-08-05 | 2013-03-06 | 株式会社リコー | トナー、並びに、現像剤、トナー入り容器、プロセスカートリッジ、及び画像形成方法 |
JP2010078683A (ja) * | 2008-09-24 | 2010-04-08 | Ricoh Co Ltd | 電子写真用トナー、二成分現像剤及び画像形成方法 |
JP5241402B2 (ja) * | 2008-09-24 | 2013-07-17 | 株式会社リコー | 樹脂粒子、トナー並びにこれを用いた画像形成方法及びプロセスカートリッジ |
JP2010078925A (ja) * | 2008-09-26 | 2010-04-08 | Ricoh Co Ltd | 静電荷像現像用マゼンタトナー |
US8846810B2 (en) * | 2010-03-08 | 2014-09-30 | Ricoh Company, Ltd. | Polymer particle and method for producing the same |
EP2365016B1 (en) * | 2010-03-08 | 2017-05-03 | Ricoh Company, Ltd. | Polymer and method for producing the same |
JP2014137503A (ja) * | 2013-01-17 | 2014-07-28 | Toshiba Corp | 現像剤、その製造方法、及びトナーカートリッジ |
EP3243108A4 (en) | 2015-01-05 | 2017-12-06 | Ricoh Company, Ltd. | Toner, toner stored unit, and image forming apparatus |
JP6520471B2 (ja) | 2015-06-29 | 2019-05-29 | 株式会社リコー | トナー、現像剤、現像剤収容ユニット及び画像形成装置 |
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Also Published As
Publication number | Publication date |
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US20070037085A1 (en) | 2007-02-15 |
US7575842B2 (en) | 2009-08-18 |
US20080233495A1 (en) | 2008-09-25 |
US7354690B2 (en) | 2008-04-08 |
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