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WO2013019015A2 - Procédé de fabrication d'un toner - Google Patents

Procédé de fabrication d'un toner Download PDF

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Publication number
WO2013019015A2
WO2013019015A2 PCT/KR2012/005908 KR2012005908W WO2013019015A2 WO 2013019015 A2 WO2013019015 A2 WO 2013019015A2 KR 2012005908 W KR2012005908 W KR 2012005908W WO 2013019015 A2 WO2013019015 A2 WO 2013019015A2
Authority
WO
WIPO (PCT)
Prior art keywords
polyester resin
dispersion
toner
mixture
molecular weight
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/KR2012/005908
Other languages
English (en)
Korean (ko)
Other versions
WO2013019015A3 (fr
Inventor
김진영
김성열
김보영
김동원
박무언
김성순
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lotte Fine Chemical Co Ltd
Original Assignee
Samsung Fine Chemicals Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Samsung Fine Chemicals Co Ltd filed Critical Samsung Fine Chemicals Co Ltd
Publication of WO2013019015A2 publication Critical patent/WO2013019015A2/fr
Publication of WO2013019015A3 publication Critical patent/WO2013019015A3/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
    • G03G9/087—Binders for 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
    • G03G9/087—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
    • 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
    • G03G9/0804—Preparation methods whereby the components are brought together in a liquid dispersing medium

Definitions

  • the present invention relates to a toner manufacturing method, and more particularly, to a toner manufacturing method excellent in circularity, low temperature fixability and glossiness.
  • toner is produced by adding a colorant, a mold release agent, a charge control agent, and the like to a thermoplastic resin serving as a binder resin. Further, in order to impart fluidity to the toner or to improve physical properties such as charge control or cleaning property, fine inorganic metal powders such as silica and titanium oxide may be added to the toner as an external additive.
  • toner production methods there are physical methods such as grinding method and chemical methods such as suspension polymerization method and emulsion aggregation method.
  • the toner manufacturing method by polymerization in the above chemical methods involves radical polymerization, only vinyl resin can be used as the binder resin. In this case, however, it is difficult to completely terminate the polymerization, so that unreacted monomers, surfactants, and the like remain in the toner particles, thereby deteriorating charge characteristics of the toner particles.
  • polyester resins have advantages such as improved pigment dispersibility, excellent transparency, low fixation temperature, and narrow glass transition temperature than vinyl resins such as styrene-acrylic copolymer resins, binding of toners for high-speed printers or color printers It is suitable as a resin.
  • toner particles are agglomerated using polyaluminum chloride (PAC) as a flocculant in a mixture of a polyester resin dispersion, a colorant dispersion, and a wax dispersion, and then agglomeration fixation /
  • PAC polyaluminum chloride
  • polyaluminum chloride is used as a coagulant, it is difficult to inactivate polyaluminum chloride by changing the pH of the reaction solution during the coagulation and fixation process, and the washing of the coagulant is not performed well during the washing and drying process, which may negatively affect the charging of toner. have.
  • Japanese Patent Laid-Open No. 11-311877 uses a salt of a divalent or higher metal ion as a flocculant in the production of toner by emulsion coagulation.
  • a salt of a divalent or higher metal ion as a flocculant in the production of toner by emulsion coagulation.
  • the content of the inorganic salt remaining in the toner particles exceeds 1% by weight, the melt viscosity at the time of fixing the toner is significantly increased, which is not preferable to the fixing property. This may occur.
  • an object of the present invention is to provide a method for producing a toner using a polyester resin as a binder resin, which is excellent in glossiness, preservation, excellent low temperature fixability, and excellent in image quality.
  • the polyester resin dispersion includes a mixture of two or more polyester resins, the mixture has a maximum peak position (MP) of 1,000 to 20,000, a number average molecular weight of 8,000 to 13,000, and a weight average molecular weight of 7,000 to 63,000.
  • MP maximum peak position
  • an inorganic base of a monovalent metal may be used as a dispersion stabilizer added to the polyester resin dispersion, and an inorganic salt of a monovalent metal may be used as a coagulant added in the aggregation step.
  • the production method of the present invention it is possible to provide a toner excellent in glossiness and storage property, excellent in low temperature fixability, and excellent in image quality.
  • Method for producing a toner comprises the steps of preparing a mixture of a polyester resin dispersion, colorant dispersion and wax dispersion;
  • the polyester resin dispersion comprises a mixture of two or more polyester resins
  • Mp Maximum Peak Position of the mixture is 1,000 to 20,000 It is characterized in that the number average molecular weight is 8,000 to 13,000, the weight average molecular weight is 7,000 to 63,000.
  • the manufacturing method of the toner may further include washing and drying the united toner particles.
  • Dispersion manufacturing process can be divided into three categories. That is, polyester resin dispersion preparation, colorant dispersion preparation, and wax dispersion preparation are included.
  • a solvent emulsion is prepared by adding an organic solvent incompatible with the polar solvent to a polar solvent containing a surfactant and a dispersion stabilizer, and then adding a mixture of two or more polyester resins in a solid state to Make ester dispersion.
  • the polyester resin is dispersed in a polar solvent containing a dispersion stabilizer, it is possible to produce a stable dispersion.
  • the polyester resin terminal is ionized by the dispersion stabilizer to form a stable dispersed state.
  • the polar solvent includes water, methanol, ethanol, butanol, acetonitrile, acetone, ethyl acetate and the like, and water is most preferred.
  • An inorganic base of a monovalent metal may be used as a dispersion stabilizer added to the polyester resin dispersion.
  • Inorganic bases of monovalent metals used as dispersion stabilizers include NaOH, LiOH, KOH and the like.
  • the mixture of two or more polyester resins contained in the polyester resin dispersion has a peak molecular weight (MP) of 1,000 to 20,000, which is a peak molecular weight measured by gel permeation chromatography, a number average molecular weight of 8,000 to 13,000, and a weight average molecular weight. This is 7,000 to 63,000.
  • MP peak molecular weight
  • the Mp and number average molecular weights of the binder resin are in the above ranges, resulting in excellent gloss, good preservation, excellent low temperature fixability, and excellent image quality.
  • the peak molecular weight (Mp) in gel permeation chromatography is a molecular weight obtained from the peak value of the elution curve obtained by GPC measurement.
  • GPC measurement conditions are as follows.
  • the calibration curve was created using standard polystyrene, and the peak molecular weight (Mp) was calculated
  • Examples of standard polystyrene samples for preparing calibration curves include TSK standard, A-500 (molecular weight 5.0 ⁇ 10 2 ), A-2500 (molecular weight 2.74 ⁇ 10 3 ), F-2 (molecular weight 1.96 ⁇ 10 4) ), F-20 (molecular weight 1.9 ⁇ 10 5 ), F-40 (molecular weight 3.55 ⁇ 10 5 ), F-80 (molecular weight 7.06 ⁇ 10 5 ), F-128 (molecular weight 1.09 ⁇ 10 6 ), F-288 ( Molecular weight 2.89 ⁇ 10 6 ), F-700 (molecular weight 6.77 ⁇ 10 6 ), and F-2000 (molecular weight 2.0 ⁇ 10 7 ) were used.
  • the peak value of the dissolution curve is a point at which the dissolution curve indicates the maximum, and when the maximum value is two or more points, the dissolution curve gives the maximum value.
  • the eluent is not particularly limited, and in addition to THF, it is also possible to use a solvent in which the polyester resin is dissolved, for example, chloroform.
  • the mixture of two or more kinds of polyester resins used in the present invention may have an acid value of 10 to 14 mgKOH / g.
  • an acid value 10 to 14 mgKOH / g.
  • the polyester resin may be prepared by polycondensing an acid component and an alcohol component, and a polyester resin is prepared using polyhydric carboxylic acid mainly for an acid component and polyhydric alcohols mainly for an alcohol component.
  • polyhydric alcohol component examples include polyoxyethylene- (2,0) -2,2-bis (4-hydroxyphenyl) propane and polyoxypropylene- (2,0) -2,2-bis (4 -Hydroxyphenyl) propane, polyoxypropylene- (2,2) -polyoxyethylene- (2,0) -2,2-bis (4-hydroxyphenyl) propane, polyoxyethylene- (2,3) -2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene- (6) -2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene- (2,3) -2,2 -Bis (4-hydroxyphenyl) propane, polyoxypropylene- (2,4) -2,2-bis (4-hydroxyphenyl) propane, polyoxypropylene- (3,3) -2,2-bis (4-hydroxyphenyl) propane, polyoxyethylene- (6) -2,2-bis (4-hydroxyphenyl) propane, ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, 1, 4-but
  • the polyhydric carboxylic acid component specifically includes aromatic polyhydric acids and / or alkyl esters thereof conventionally used for producing polyester resins.
  • aromatic polyacids include terephthalic acid, isophthalic acid, trimellitic acid, pyromellitic acid, 1,2,4-cyclohexanetricarboxylic acid, 2,5,7-naphthalenetricarboxylic acid, 1,2,4 Naphthalenetricarboxylic acid, 1,2,5-hexanetricarboxylic acid, 1,2,7,8-octanetetracarboxylic acid and the like and / or alkyl esters of these carboxylic acids. Methyl, ethyl, propyl, butyl group, etc. are mentioned.
  • the aromatic polyacids and / or alkyl esters thereof may be used alone or in combination of two or more thereof.
  • the polyester resin may be a sulfonic acid group-free polyester resin.
  • the glass transition temperature of the mixture of 2 or more types of polyester resins used for this invention is 40-80 degreeC, More preferably, it is 50-75 degreeC.
  • the glass transition temperature is lower than 40 ° C.
  • the toner formed by using the polyester resin particles may cause storage stability problems.
  • the glass transition temperature exceeds 80 °C, the offset is likely to occur, especially in color printing, the problem may be more serious.
  • the kind of polyester resin used in order to obtain the mixture of 2 or more types of polyester resins is not restrict
  • organic solvent used in the polyester resin dispersion one or more selected from the group consisting of dimethyl ether, diethyl ether, 1,1-dichloroethane, 1,2-dichloroethane, dichloromethane, and chloroform may be used. It is not necessarily limited to these.
  • the surfactant used in the polyester resin dispersion is preferably used in an amount of 1 to 4 parts by weight, and an organic solvent in an amount of 15 to 200 parts by weight, based on 100 parts by weight of the polyester resin mixture, and the dispersion stabilizer is selected from the polyester resin mixture. It is preferable to use in an amount of 2-3 equivalents to the acid value.
  • the colorant dispersion may be dispersed in water using a dispersant such as a surfactant, or may be dispersed using an organic solvent.
  • a dispersant such as a surfactant
  • anionic surfactants and nonionic surfactants are preferable, and anionic surfactants are more preferable.
  • a dispersion is prepared using a master batch in which a pigment and a polyester resin are kneaded. Specifically, after the master batch and the organic solvent are put into a ball mill and milled for about 24 hours, the mixed solution is added to water containing a surfactant and a dispersion stabilizer to obtain a master batch pigment dispersion. Moreover, you may disperse
  • the dispersion stabilizer used may be a dispersion stabilizer such as NaOH used in preparing a polyester resin dispersion.
  • the use of the master batch pigment dispersion results in better color development after toner production than when the pigment dispersion is used.
  • the colorant 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, 3 to 15 parts by weight based on 100 parts by weight of the polyester resin mixture. If the content is less than 3 parts by weight, the coloring effect may be insufficient. If the content is more than 15 parts by weight, the electric resistance of the toner is lowered, so that sufficient triboelectric charge may not be obtained, resulting in contamination.
  • Wax dispersions can be prepared by dispersing natural or synthetic waxes in water or in organic solvents.
  • wax a known wax can be used.
  • natural waxes such as carnauba wax and rice wax
  • synthetic waxes such as polypropylene wax and polyethylene wax
  • petroleum wax such as montan wax, alcohol wax, and ester wax etc.
  • Wax may be used individually by 1 type, and may use 2 or more types together.
  • a dispersion is obtained by using a surfactant or a dispersion stabilizer and dispersing using a disperser such as a high pressure or high speed homogenizer.
  • a disperser such as a high pressure or high speed homogenizer.
  • the wax can be dispersed in the same manner as in the case of producing a polyester resin dispersion. That is, a solvent emulsion is prepared by adding an organic solvent to water containing a surfactant and a dispersion stabilizer, and a wax is added to a solid state to prepare a dispersion.
  • 0.5-20 weight part is preferable with respect to 100 weight part of polyester resin, and, as for wax content, 1-10 weight part is more preferable.
  • the toner particles are agglomerated by adding the flocculant and the acid while stirring the respective dispersions prepared in the above dispersion preparation step.
  • the coagulation process is preferably performed at room temperature, it may be heated up to the glass transition temperature (Tg) of the polyester resin, and the particle diameter and shape are uniform by stirring the mixed liquid of each dispersion liquid by using a stirrer and mechanical shear force. Agglomerates can be formed in one particle state.
  • the inorganic salt of the monovalent metal used as the flocculant may be NaCl or KCl.
  • the amount of the flocculant used is 0.3 to 5% by weight, preferably 0.5 to 3% by weight, based on the total solids content of the flocculation step reaction solution. If the amount of the flocculant is less than 0.3% by weight, aggregation may not occur, and when the amount of the flocculant is greater than 5% by weight, the aggregated particles may be too large.
  • the pH may be adjusted by addition of acid in the flocculation process, and the preferred pH may be 4.5 to 6.5.
  • the coagulation step may be performed by stirring the reaction solution at 1.0 to 7.0 m / sec at a temperature of 40 to 60 °C.
  • a monovalent metal ion derived from an inorganic base of a monovalent metal used as a dispersion stabilizer in preparing a polyester resin dispersion may serve as a coagulant, and thus a small amount of coagulant. Also excellent coagulation effect can be obtained by using.
  • the temperature of the reaction solution is maintained and the pH is raised to 10.
  • an inorganic base such as NaOH, KOH or LiOH is added.
  • the mixed liquid containing the toner particles is heated to uniform the particle size and shape of the aggregated toner particles. It is preferable to adjust to a particle size of 1 to 20 mu m by heating to a temperature higher than the glass transition temperature (Tg) of the polyester resin mixture, whereby toner particles having a nearly uniform particle size and shape can be obtained.
  • Tg glass transition temperature
  • the surface properties of the particles can be improved by heating to a temperature above the glass transition temperature (Tg) of the polyester resin mixture, and the polyester resin dispersion or polystyrene before heating to a temperature above the glass transition temperature (Tg) of the polyester resin mixture
  • Tg glass transition temperature
  • the polyester resin dispersion or polystyrene butyl acrylate latex added may use a resin dispersion having the same physical properties (Tg, molecular weight) as the polyester resin dispersion used in the previous step. You may use it.
  • Tg When using Tg and a higher molecular weight, Tg is 60-85 degreeC, and it is preferable that molecular weight is 10,000-300,000.
  • This additionally added resin dispersion may increase the particle size while wrapping the toner particles produced in the flocculation step. To prevent this, a surfactant is added or the pH is adjusted, and the temperature is raised above the glass transition temperature of the polyester resin. The coalescing process can proceed.
  • the toner particles obtained in the coalescence process are washed with water and dried.
  • the mixed liquid containing toner is cooled to room temperature, the mixed liquid is filtered, the filtrate is removed, and the toner is washed with water.
  • the washing of the toner using pure water may be performed batchwise or continuously.
  • the cleaning of the toner using pure water is performed to remove unnecessary components other than toner components such as impurities that may affect the chargeability of the toner and unnecessary coagulants that do not participate in aggregation.
  • toner particles are not reaggregated due to reactivation of inorganic salts due to pH change in the washing process, and inorganic salts of monovalent metals are compared with inorganic salts of polyvalent metals.
  • the solubility in toner is so great that it is easy to remove during washing, and the amount of inorganic salt remaining in the toner is also significantly lowered, so that the melt viscosity of the toner particles does not increase and is preferable for fixing characteristics.
  • the toner obtained after the washing step is dried using a fluidized bed dryer, a flash jet dryer, or the like.
  • a desired external additive may be added to the toner obtained by drying.
  • the glass transition temperature, weight average molecular weight, number average molecular weight, acid value and Mp value of the prepared polyester resin were measured by the following method.
  • 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 it, and titrating with 0.1 N KOH methyl alcohol solution.
  • the weight average molecular weight of the binder resin was measured by gel permeation chromatography (GPC) using a calibration curve using a polystyrene reference sample.
  • Peak molecular weight (Mp) was calculated
  • the peak value of an elution curve is a point where an elution curve shows a maximum value, and when a maximum value is two or more points, it is a point which gives the maximum value of an elution curve.
  • signal intensity I (Mp) of the GPC curve in the position of a peak molecular weight, and signal intensity I (M100000) of the GPC curve in the position of molecular weight 100,000 are respectively signal intensity and a base in the position of a peak molecular weight. It is the difference of the signal intensity of a line, the difference of the signal intensity in the position of molecular weight 100,000, and the signal intensity of a baseline, and is shown by electric potential.
  • Filtration conditions filter the sample solution with 0.45 ⁇ m Teflon® membrane filter
  • Standard polystyrene sample for calibration curve preparation TSK standard, A-500 (molecular weight 5.0 ⁇ 10 2 ), A-2500 (molecular weight 2.74 ⁇ 10 3 ), F-2 (molecular weight 1.96 ⁇ 10 4 ) F-20 (molecular weight 1.9 ⁇ 10 5 ), F-40 (molecular weight 3.55 ⁇ 10 5 ), F-80 (molecular weight 7.06 ⁇ 10 5 ), F-128 (molecular weight 1.09 ⁇ 10 6 ), F-288 (molecular weight 2.89 ⁇ 10 6 ), F-700 (molecular weight 6.77 ⁇ 10 6 ), F-2000 (molecular weight 2.0 ⁇ 10 7 ).
  • polyester resin dispersion A having a solid content concentration of 17% was obtained.
  • the average particle diameter of the dispersed particles of the polyester resin dispersion was 0.2 ⁇ m. The average particle diameter was measured by a microtrack particle size analyzer (NIKKISO, Japan).
  • a polyester resin dispersion B was obtained in the same manner as in Preparation Example 6, except that 40 ml of a 1N sodium hydroxide solution as a dispersion stabilizer was used, and a polyester resin mixture having a ratio shown in Table 3 below was used as the polyester resin mixture. . At this time, the average particle diameter of the dispersed particles of the polyester resin dispersion was 0.3 ⁇ m.
  • a polyester resin dispersion C was obtained in the same manner as in Preparation Example 6, except that 50 ml of a 1N sodium hydroxide solution as a dispersion stabilizer was used and a polyester resin mixture having a ratio shown in Table 3 below was used as the polyester resin mixture. At this time, the average particle diameter of the dispersed particles of the polyester resin dispersion was 0.3 ⁇ m.
  • a polyester resin dispersion D was obtained in the same manner as in Preparation Example 6, except that 40 ml of a 1N sodium hydroxide solution as a dispersion stabilizer was used and a polyester resin mixture having a ratio shown in Table 3 below was used as the polyester resin mixture. At this time, the average particle diameter of the dispersed particles of the polyester resin dispersion was 0.5 ⁇ m.
  • a polyester resin dispersion E was obtained in the same manner as in Preparation Example 6, except that 10 ml of a 1N sodium hydroxide solution as a dispersion stabilizer was used and only the polyester resin (1) was used as the polyester resin. At this time, the average particle diameter of the dispersed particle of the polyester resin dispersion was 0.4 ⁇ m.
  • a polyester resin dispersion F was obtained in the same manner as in Preparation Example 6, except that 10 ml of 1N sodium hydroxide solution as a dispersion stabilizer was used and only polyester resin (3) was used as the polyester resin. At this time, the average particle diameter of the dispersed particle of the polyester resin dispersion was 0.4 ⁇ m.
  • Table 3 shows the component resin content, the number average molecular weight, the weight average molecular weight, and the Mp value of the polyester resin dispersions A to F.
  • the reactor contents were then subjected to high dispersion at a pressure of 1,500 bar using the Ultimaizer system (Amstec Ltd., Model HJP25030).
  • cyan pigment particles dispersed at a nano size having a volume average particle diameter (D50 (v)) of 150 nm were obtained.
  • paraffin wax NIPPON SEIRO, HNP10, melting point 72 ° C.
  • anionic surfactant dowfax, Dow Corning
  • ion-exchanged water 160 g
  • a homogenizer IKA
  • the polyester resin dispersion A, the pigment dispersion and the wax dispersion were mixed in amounts of 89.6% by weight, 5.2% by weight and 5.2% by weight, respectively, based on solid content to obtain a mixed solution. At this time, it adjusted with pure water so that total solid concentration might be 13 weight%. 53 g of 10% aqueous sodium chloride solution and 10 g of 0.3 M aqueous nitric acid solution were added to the mixed solution, which was stirred at 10000 rpm using a blending stirrer and heated up to 55 ° C. After stirring for about 3 hours to agglomerate, the pH was adjusted to 10 and the temperature was raised to 96 ° C to unite the toner particles.
  • toner was prepared in the same manner as in Example 1 to prepare a cyan toner.
  • toner was prepared in the same manner as in Example 1 to prepare a cyan toner.
  • Toner particles were prepared by mixing 0.2 g of silica (RX200; manufactured by Degussa®) and 0.05 g of silica (RX50; manufactured by Degussa®) with respect to 10 g of the toner particles prepared in Examples 1 to 4 and Comparative Examples 1 and 2.
  • the average particle size, circularity, image evaluation, glossiness evaluation, and preservation evaluation of each particle were carried out as follows, and the results are shown in Table 4.
  • the average particle diameter of the toner particles was measured using Coulter Multisizer III (backman coulter, USA), the number of particles measured was 50000 count and the aperture used was 100 ⁇ m.
  • 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 to 100 ml of distilled water, adding 10 to 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 formula.
  • the area means the area of the projected toner and the perimeter means the circumferential length of a circle having the same area as the area of the projected toner. The closer to 1, the more spherical.
  • Image evaluation was performed by developing with a CP 2025 (HP) retrofit device which is a digital full color printer. Image density was measured using spectroeye (GretagMacbeth).
  • Image density is 1.3 or higher
  • ng image density is 1.3 or less
  • the shelf life was stored in a 50 ml sample bottle for 5 grams of toner and stored for 24 hours in a chamber at a temperature of 50 ° C. and 80% humidity. After removing the stored sample and leaving it at room temperature, visually confirm the degree of aggregation, sift with a 100 ⁇ m sieve, and measure the amount remaining on the stomach. If the amount is 10% or more, ng, 10% or less ok Evaluated as.
  • Comparative Example 1 lacks low-molecular-weight polyester resin particles because of low molecular weight polyester resin particles.
  • Comparative Example 2 since there are few polyester resin particles of low molecular weight and high molecular weight, the offset tends to come out at both low temperature and high temperature.
  • the toner particles produced by the manufacturing method of the present invention have a narrow particle size distribution, no hot offset, excellent gloss, preservation, and excellent image quality. It can also be seen that the fixing temperature range is wide.

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

Abstract

L'invention concerne un procédé de fabrication d'un toner. Dans le procédé de préparation du toner selon la présente invention, une résine polyester spécifique peut être utilisée pour produire un toner dont les particules présentent une meilleure sphéricité et pour prévenir l'apparition du maculage à chaud. De plus, il est possible d'obtenir un toner présentant une meilleure brillance et densité d'image.
PCT/KR2012/005908 2011-08-04 2012-07-25 Procédé de fabrication d'un toner Ceased WO2013019015A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110077841A KR20130015699A (ko) 2011-08-04 2011-08-04 토너의 제조방법
KR10-2011-0077841 2011-08-04

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WO2013019015A2 true WO2013019015A2 (fr) 2013-02-07
WO2013019015A3 WO2013019015A3 (fr) 2013-04-04

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2328035B1 (fr) * 2003-12-10 2016-03-02 Sanyo Chemical Industries, Ltd. Particules de résine
JP4753807B2 (ja) * 2006-03-14 2011-08-24 株式会社リコー 静電荷像現像用トナーおよび該静電荷像現像用トナーを用いた画像形成装置
JP5185005B2 (ja) * 2008-07-31 2013-04-17 三洋化成工業株式会社 静電荷像現像用トナー
KR20110068636A (ko) * 2009-12-16 2011-06-22 삼성정밀화학 주식회사 토너의 제조방법

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WO2013019015A3 (fr) 2013-04-04

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