WO2010120060A2 - Encre en poudre (toner) pour le développement d'une image électrostatique - Google Patents

Encre en poudre (toner) pour le développement d'une image électrostatique Download PDF

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Publication number
WO2010120060A2
WO2010120060A2 PCT/KR2010/002093 KR2010002093W WO2010120060A2 WO 2010120060 A2 WO2010120060 A2 WO 2010120060A2 KR 2010002093 W KR2010002093 W KR 2010002093W WO 2010120060 A2 WO2010120060 A2 WO 2010120060A2
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WO
WIPO (PCT)
Prior art keywords
toner
toner particles
polyester resin
weight
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2010/002093
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English (en)
Korean (ko)
Other versions
WO2010120060A3 (fr
Inventor
황일선
황대일
이준희
최대웅
김윤나
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Lotte Fine Chemical Co Ltd
Original Assignee
Samsung Fine Chemicals Co Ltd
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Filing date
Publication date
Application filed by Samsung Fine Chemicals Co Ltd filed Critical Samsung Fine Chemicals Co Ltd
Publication of WO2010120060A2 publication Critical patent/WO2010120060A2/fr
Publication of WO2010120060A3 publication Critical patent/WO2010120060A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • G03G9/0827—Developers with toner particles characterised by their shape, e.g. degree of sphericity
    • 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
    • G03G9/0821—Developers with toner particles characterised by physical parameters
    • 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
    • G03G9/087—Binders for toner particles
    • G03G9/08742—Binders for toner particles comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • G03G9/08755—Polyesters
    • 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
    • G03G9/087—Binders for toner particles
    • G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
    • G03G9/08791—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775 characterised by the presence of specified groups or side chains
    • 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
    • G03G9/087—Binders for toner particles
    • G03G9/08784—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775
    • G03G9/08795—Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775 characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants

Definitions

  • the present invention relates to toner particles for electrostatic image development, an electrophotographic image forming developer including the same, and an electrophotographic image forming method using the same, and more particularly, to prevent deterioration of charging characteristics due to moisture absorption and high temperature storage stability.
  • toners suitable for high-speed printing in particular, toners having a small volume average particle size and narrow particle size distribution, which provide improved fixability and improved high temperature storage stability.
  • toner is prepared by adding a colorant, a charge control agent, a release agent, or the like to a thermoplastic resin serving as a binder resin.
  • a colorant e.g., a colorant, a charge control agent, a release agent, or the like
  • thermoplastic resin serving as a binder resin.
  • inorganic and / or fine metal powders such as silica and titanium oxide, may be added to the toner as an external additive to impart fluidity to the toner or to improve physical properties such as charge control or cleaning properties.
  • thermoplastic resin a polyester resin or a vinyl resin is used. Since the vinyl resin is manufactured by a chemical method such as suspension polymerization method or emulsion aggregation method, it is possible to provide toner particles having a uniform particle size. However, since the chemical method involves radical polymerization, it is difficult to terminate the polymerization completely, and unreacted monomers, surfactants, and the like remain in the toner particles. Therefore, there is a disadvantage that the charge characteristics of the toner particles are lowered due to the unreacted monomers remaining in the toner particles.
  • the polyester resin has a low melt viscosity and has the advantage that can be rapidly melted is suitable for use in high-speed printing toner compared to the vinyl-based resin. However, it does not satisfy all the properties required for toner for high speed printers.
  • Japanese Patent Laid-Open No. 10-39545 a pigment dispersion obtained by dispersing a pigment in water using sodium sulfonated polyester is added to a latex emulsion in which sodium sulfonated polyester is dispersed in water, and aggregates are formed to prepare a toner.
  • a method is disclosed, and this toner manufacturing method provides an toner composition by agglomerating a pigment dispersed in water using sodium sulfonated polyester and sodium sulfonated polyester latex dispersed in water. It is a manufacturing method of a toner composition which does not contain unnecessary components, such as a monomer and surfactant.
  • the dispersion stability of the pigment is insufficient only by dispersing the pigment using sodium sulfonated polyester, so that aggregation of the pigments occurs, and toner properties such as color reproducibility are not satisfactory.
  • the toner composition produced by this method has a problem in that its use is limited because of unstable charging characteristics according to environmental conditions, which is thought to be derived from a hydrophilic group sulfonic acid group.
  • the first technical problem to be achieved by the present invention is to provide toner particles capable of simultaneously securing a small volume average particle size, narrow particle size distribution, excellent fixability and high temperature storage stability.
  • the second technical problem to be achieved by the present invention is to provide an electrostatic image developer comprising the toner particles.
  • the third technical problem to be achieved by the present invention is to provide an electrophotographic image forming method using the electrostatic image developer.
  • toner particles comprising a binder resin and a colorant and having a volume average particle diameter of 2 to 10 ⁇ m and an 80% span value of 0.9 or less
  • the binder resin is a sulfonic acid group-free polyester resin having a weight average molecular weight of 6,000 to 100,000, a glass transition temperature of 55 to 70 ° C., and a polydispersity index (Mw / Mn) of 3 to 25. do.
  • an electrophotographic image forming method comprising the step of attaching the toner to a photosensitive member surface on which an electrostatic latent image is formed to form a toner image, and transferring the toner image to a transfer material.
  • the toner particles of the present invention have a small volume average particle size, narrow particle size distribution, improved fixability and improved high temperature storage stability while using a polyester resin as a binder resin.
  • Toner particles according to an aspect of the present invention comprises a binder resin and a colorant, the volume average particle diameter is 2 to 10 ⁇ m, 80% span value is 0.9 or less, the binder resin has a weight average molecular weight of 6,000 to 100,000, glass transition A sulfonic acid group-free polyester resin having a temperature of 55 to 70 ° C. and a polydispersity index of 3 to 25.
  • the toner particles can solve the problem of instability of charging characteristics due to environmental change by including a polyester resin containing no sulfonic acid group as a binder resin.
  • the sulfonic acid group-free polyester resin has an acid value of 4 to 20 mgKOH / g.
  • the acid value range when the toner particles are stored in a high temperature, high humidity environment, there is an advantage of preventing a decrease in charge amount due to moisture absorption.
  • the volume average particle diameter of the toner particles exceeds 10 mu m, the size of the toner particles increases, which is not suitable for high speed printing.
  • the 80% span value exceeds 0.9, the toner particle diameter becomes uneven, resulting in poor charging characteristics, contamination in the apparatus, and the like.
  • the 80% span value is not particularly limited as long as it is 0.9 or less, but is preferably 0.1 to 0.9.
  • the polyester resin contained in the toner particles preferably has an insoluble content of 0.1 to 20% by weight, more preferably 0,3 to 10% by weight, and 0.5 to 5% by weight, based on THF (Tetrahydrofuran) solvent. Most preferred.
  • THF Tetrahydrofuran
  • the insoluble content of the THF solvent exceeds 20% by weight, there is a disadvantage in that the solution viscosity due to the insoluble content is large, and when it is less than 0.1% by weight, the high temperature fixability is disadvantageous.
  • the circularity of the toner particles is preferably 0.92 to 0.99. If the roundness exceeds 0.99, residual toner may be generated on the photosensitive drum in the cleaning step, which may cause a problem in the operation of the apparatus. If the roundness is less than 0.92, the transfer rate may be lowered to increase the toner consumption.
  • the colorant included in the toner particles may be used as the pigment itself or in the form of a pigment masterbatch in which the pigment is dispersed in the resin.
  • the pigment may be appropriately selected from black pigments, cyan pigments, magenta pigments, yellow pigments, and mixtures thereof, which are commonly used pigments.
  • the content of the colorant may be sufficient to color the toner to form a visible image by development, for example, preferably 1 to 20 parts by weight based on 100 parts by weight of the binder resin.
  • a release agent such as wax, a charge control agent, or the like may be used.
  • both an ancillary charge control agent and an antistatic charge control agent may be used.
  • the charge control agent include an organometallic complex or a chelate compound; Metal-containing salicylic acid compounds; And organometallic complexes of aromatic hydroxycarboxylic acids and aromatic dicarboxylic acids may be used, and any known ones are not particularly limited.
  • the antistatic charge control agent a product modified with nigrosine and a fatty acid metal salt thereof, an onium salt containing a quaternary ammonium salt, or the like may be used alone or in combination of two or more thereof. Such a charge control agent charges the toner stably and at high speed by the electrostatic force, thereby stably supporting the toner on the developing roller.
  • the content of the charge control agent included in the toner is generally within the range of 0.1 parts by weight to 10 parts by weight based on 100 parts by weight of the total toner composition.
  • the total toner composition means the entire toner component including an external additive as well as a binder resin, a colorant, and an additive.
  • polyalkylene waxes such as low molecular weight polypropylene and low molecular weight polyethylene, ester wax, carnauba wax, paraffin wax and the like can be used.
  • the amount of wax contained in the toner is generally within the range of 0.1 part by weight to 30 parts by weight with respect to 100 parts by weight of the total toner composition.
  • the content of the wax is less than 0.1 parts by weight, it is not desirable to realize an oilless fixation capable of fixing the toner particles without using oil, and when the content of the wax exceeds 30 parts by weight, the toner is agglomerated when stored. This is undesirable because it can be caused.
  • the additive may further include an external additive.
  • the external additive is to improve the fluidity of the toner or to control the charging characteristics, and includes large particle size silica, small particle size silica, and polymer beads.
  • Toner particles according to embodiments of the present invention can be produced by various methods. That is, the method used in the art is not particularly limited as long as it is a method that can produce toner particles having the above physical properties.
  • a polar solvent, an organic solvent, and a surfactant are added to a reactor at room temperature, followed by stirring to prepare a solvent emulsion in which an organic solvent is dispersed in a polar solvent.
  • toner constituents including a binder resin, a colorant, a release agent (wax), a charge control agent, and the like are added to the solvent emulsion to dissolve the toner constituents in an organic solvent.
  • the solvent emulsion containing the toner constituents is then heated to remove the organic solvent and then recover the toner particles.
  • an electrostatic image developer including the toner particles and the magnetic carrier is provided.
  • the magnetic carrier is preferably a carrier whose surface is covered with an insulating material. More specifically, the carrier is a carrier used in a general two-component development method, and ferrite coated with an insulating material, magnetite coated with an insulating material, iron powder coated with an insulating material, or a mixture thereof is preferable. Particular preference is given to ferrite or magnetite coated with an insulating material.
  • an electrophotographic image forming method using the toner particles is provided.
  • an image forming method comprising the step of adhering the toner or the electrostatic image developer to a surface of a photosensitive member on which an electrostatic latent image is formed to form a toner image, and transferring the toner image to a transfer material.
  • the toner or the electrostatic image developer according to the present invention is used in an electrophotographic image forming apparatus, wherein an electrophotographic image forming apparatus means a laser printer, a copying machine, a facsimile or the like.
  • Coulter Multisizer 3 an aperture was 100 ⁇ m, and an appropriate amount of a surfactant was added to 50-100 ml of ISOTON-II (Beckman Coulter, Inc.), an electrolyte, and 10-15 mg of the measurement sample was added thereto. After the dispersion was processed for 5 minutes in an ultrasonic disperser to prepare a sample.
  • the 80% span value is an index that defines the particle size distribution.
  • the particle size corresponding to 10% of the volume that is, the particle size corresponding to 10% of the total volume when the volume is accumulated from small particles, is measured by d10, 50.
  • the particle size corresponding to% was defined as d50 and the particle size corresponding to 90% was defined as d90, the values were obtained from the particle size distribution chart, and the value was obtained by the following Equation 1.
  • the measurement was carried out using FPIA-3000 (manufactured by Sysmex, Japan).
  • FPIA-3000 manufactured by Sysmex, Japan.
  • the measurement sample was prepared by adding an appropriate amount of a surfactant to 50-100 ml of distilled water, adding 10-20 mg of toner particles thereto, and then dispersing in an ultrasonic disperser for 1 minute.
  • the circularity is automatically obtained from FPIA-3000 by the following equation.
  • Circularity ⁇ 2 ⁇ (area ⁇ ⁇ ) 1/2 ⁇ / (perimeter)
  • the area means the area of the projected toner
  • the perimeter means the circumferential length of a circle having the same area as the area of the projected toner. This value can range from 0 to 1. The closer to 1, the more spherical.
  • the sample was heated to 20 ° C. to 200 ° C. at a heating rate of 10 ° C./min, quenched to 10 ° C. at a cooling rate of 20 ° C./min, and then again to 10 ° C. It measured by heating up at the heating rate of / min.
  • the acid value (mgKOH / g) was measured by dissolving the resin in dichloromethane, cooling the solution, and titrating with 0.1 N KOH methyl alcohol solution.
  • the tetrahydrofuran insoluble content was measured by dissolving the resin in tetrahydrofuran and then determining the content of the resin remaining in a gel state without being completely dissolved.
  • a 3L reactor equipped with a stirrer, a nitrogen gas inlet, a thermometer, and a cooler was installed in the oil chain oil tank.
  • 50 g of terephthalic acid, 47 g of isophthalic acid, 80 g of 1,2-propylene glycol, and 3 g of trimellitic acid were added to the reactor thus installed, and 500 ppm of dibutyltin oxide was added to the total weight of the monomer as a catalyst.
  • the temperature was warmed up to 150 ° C. while stirring the reactor stirring speed at 150 rpm.
  • the reaction was carried out for 6 hours, warmed up to 220 ° C., and the reactor was depressurized to 0.1torr to remove side reactants, and the reaction was carried out for 15 hours under the same pressure condition to complete the reaction.
  • a 3 L reactor equipped with a stirrer, thermometer, condenser and nitrogen inlet was installed in the oil bath.
  • 137 g of dimethyl terephthalate, 55 g of dimethyl isophthalate, 0.15 g of dimethyl 5-sulfoisophthalate sodium salt, 175 g of 1,2-propylene glycol and 4.0 g of trimellitic acid were added to the reactor.
  • tetrabutyl titanate was added as a polymerization catalyst in an amount of 500 ppm relative to the total weight of the monomer.
  • the temperature was then increased to 150 ° C. while maintaining the reactor stirring rate at 100 rpm. Thereafter, the reaction was performed for about 5 hours.
  • a 3 L reactor equipped with a stirrer, thermometer, condenser and nitrogen inlet was installed in the oil bath.
  • 97 g of dimethyl terephthalate, 96 g of dimethylisophthalate, 0.15 g of dimethyl 5-sulfoisophthalate sodium salt, 175 g of 1,2-propylene glycol and 4.0 g of trimellitic acid were added to the reactor.
  • tetrabutyl titanate was added as a polymerization catalyst in an amount of 500 ppm relative to the total weight of the monomers.
  • the temperature was then raised to 150 ° C. while maintaining the reactor stirring rate at 100 rpm. After this, the reaction was allowed to proceed for about 5 hours.
  • the glass transition temperature, acid value and number average particle diameter of the polyester resin obtained in the above production example were measured according to the following measuring method, and the results are shown in Table 1 below.
  • the contents were formed while stirring the contents at 1000 rpm, then heated to reflux at 72 ° C. and stirred for 3 hours to obtain an emulsion. After stirring, it was confirmed that the resin present at the bottom of the reactor was completely dissolved to obtain a stable emulsion.
  • the stirring speed of the emulsion was reduced to 300 rpm and the temperature in the reactor was heated to 90 ° C. to remove methyl ethyl ketone, which is an organic solvent, at a partially reduced pressure of 100 mmHg.
  • the toner particles were then separated from the emulsion using a conventional filtration device.
  • the filter cake was redispersed in distilled water and refiltered four times to repeat the washing process to remove both the surfactant and the thickener contained in the filter cake.
  • the refiltered toner particles were dried overnight in a vacuum oven at 40 ° C. to obtain dried toner particles.
  • it was found to contain 87.9 wt% of polyester resin, 5.6 wt% of colored pigment, 4.6 wt% of Carnauba wax, and 1.9 wt% of charge control agent.
  • polyester resin (1) prepared in Preparation Example 1 15 g of cyan pigment master batch (1) prepared in Preparation Example 3, and 2 g of charge control agent (N-) in a pressurized 1 L reactor equipped with a condenser, thermometer, and impeller stirrer. 23; HB Dinglong, Hubei, China), Carnauba Wax (SX-70; max Chemical, Daejeon, Korea) 5g, and methyl ethyl ketone (Aldrich Chemical Company, Milwaukee, Wis.) Sequentially 50 ml of an aqueous NaOH solution was added while stirring the contents at 600 rpm, and the mixture was mixed at a temperature of 80 ° C. for 5 hours at reflux. After confirming that the mixture had sufficient fluidity, the mixture was further mixed at 500 rpm for 2 hours.
  • the volume average particle diameter of the particles contained in the emulsion from which methyl ethyl ketone was completely removed was measured to be 0.4 ⁇ m.
  • the temperature in the 3L reactor was cooled to 45 ° C., 10 g of magnesium chloride (MgCl 2 ) was dissolved in 50 g of distilled water, and slowly introduced into the reactor. It was 6.2 micrometers when the average particle diameter was measured.
  • MgCl 2 magnesium chloride
  • Toner particles were prepared in the same manner as in Example 2, except that 85 g of the polyester resin (3) synthesized in Preparation Example 3 was used instead of 85 g of the polyester resin (1) synthesized in Preparation Example 1.
  • polyester resin and toner particles prepared in Preparation Examples and Examples were evaluated by the following method.
  • the toner particles of Examples 1 and 2 according to one embodiment of the present invention showed a volume average particle diameter of 10 ⁇ m or less, an 80% span value of 0.9 or less, and a circularity of 0.99 or less.
  • the toner particles of Comparative Example 1 were out of the above-described physical property ranges. Therefore, it can be seen that the toner particles according to the embodiment of the present invention have a small volume average particle diameter and a narrow size distribution.
  • toner 5 g was weighed in a 50 ml sample bottle and stored for 24 hours in a chamber at a temperature of 50 ° C. and a humidity of 80%. The stored sample was taken out and left at room temperature to visually check the degree of aggregation. After sifting with 100 ⁇ m sieve, the remaining amount was measured, and the amount was greater than 10% and ng, and less than 10% was evaluated as ok. .
  • Toner particles according to an embodiment of the present invention prepared by the method according to Examples 1 and 2 showed improved fixability and improved high temperature storage stability compared to the toner particles of Comparative Example 1.
  • the toner particles according to the embodiment of the present invention can be fixed in a relatively wide temperature range compared to the toner particles of Comparative Example 1.
  • the degree of separation indicates the degree of separation of the carrier and the toner during the charge amount measurement, and it is important that the degree of separation be the same as the mixing ratio when the carrier and the toner are added.
  • a toner excellent in exhibiting a constant charge value measured in a high temperature, high humidity environment and a normal temperature and humidity environment Therefore, as shown in the above table, it can be seen that the toner according to the present invention has excellent retention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

La présente invention concerne une encre en poudre (toner) qui présente une meilleure stabilité au stockage à haute température et qui prévient la dégradation de ses propriétés de charge due à l'absorption de l'humidité. L'encre en poudre a un diamètre moyen volumique de particule compris entre 2 et 10 μm et une valeur de span à 80 % inférieure ou égale à 0,9, et comprend une résine de liant et un colorant. La résine de liant est une résine de polyester exempte de groupe d'acide sulfonique ayant une masse moléculaire moyenne en poids comprise entre 6000 100'000, une température de transition du verre comprise entre 55 °C et 70 °C et un indice de polydispersité (Mw/Mn) compris entre 3 et 25.
PCT/KR2010/002093 2009-04-17 2010-04-06 Encre en poudre (toner) pour le développement d'une image électrostatique Ceased WO2010120060A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090033742A KR20100115150A (ko) 2009-04-17 2009-04-17 정전하상 현상용 토너
KR10-2009-0033742 2009-04-17

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WO2010120060A2 true WO2010120060A2 (fr) 2010-10-21
WO2010120060A3 WO2010120060A3 (fr) 2010-12-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10338488B2 (en) * 2017-09-26 2019-07-02 Fuji Xerox Co., Ltd. Image forming apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6287742B1 (en) * 2000-05-16 2001-09-11 Matsci Solutions, Inc. Toner compositions and method of producing toner for developing latent electrostatic images
KR100481481B1 (ko) * 2002-02-15 2005-04-07 주식회사 디피아이 솔루션스 폴리에스터 입자 내부에 왁스를 삽입시킨 정전 잠상 현상용 토너 조성물 및 그 제조 방법
KR100811112B1 (ko) * 2006-04-19 2008-03-06 주식회사 디피아이 솔루션스 안료를 포함하는 폴리에스테르계 화학 토너 조성물 및 그제조방법
KR101130683B1 (ko) * 2007-01-12 2012-04-02 주식회사 이미지앤머터리얼스 정전 잠상 현상용 토너의 제조방법 및 이를 이용하여 제조된 토너
KR100872823B1 (ko) * 2007-02-21 2008-12-09 주식회사 디피아이 솔루션스 염료와 안료를 동시에 포함하는 화학 토너 조성물 및 그제조 방법
KR100833919B1 (ko) * 2007-02-23 2008-05-30 삼성정밀화학 주식회사 미세현탁입자를 이용한 토너의 제조방법 및 그 방법에 의해제조된 토너

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10338488B2 (en) * 2017-09-26 2019-07-02 Fuji Xerox Co., Ltd. Image forming apparatus

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KR20100115150A (ko) 2010-10-27
WO2010120060A3 (fr) 2010-12-23

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