JPH02118668A - Capsulated toner - Google Patents

Abstract

PURPOSE:To increase the strength of a core while maintaining the fixability and to obtain a capsulated toner having such satisfactory strength that the toner is not broken even in a developing device by gelatinizing a fixing component in the core material. CONSTITUTION:A shell is formed around a core material by interfacial polymn. or in-situ polymn. and a fixing component in the core material is allowed to exist as a gelatinized resin soln. or dispersion by adding a gelatinizer to a resin soln. or dispersion or using a resin soln. or dispersion liable to gelatinize at a temp. close to room temp. as the principal component of the core. Naphthenic acid or oleic acid may be used as the gelatinizer. The strength of the core is increased while maintaining the fixability and a capsulated toner having such satisfactory strength that the toner is not broken even in a developing device is obtd.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a capsule toner, and relates to a toner suitable for pressure fixing used in electrophotography, electrostatic recording, magnetic recording, etc. be.

[Prior Art] Conventionally, electrophotography methods have been disclosed in US Pat.
A large number of methods are known, especially those described in Japanese Patent No. 3-24748. - Generally, after forming an electrical latent image on a photoreceptor made of a photoconductive substance by various methods, the latent image is developed using toner, and then this toner image is transferred to a transfer material such as paper. After being transferred to a computer, it is fixed and visualized. Three methods are known for fixing the above-mentioned toner image on paper or the like: heat fixing, solvent fixing, and pressure fixing. The most common method is a heat fixing method using a heat roller.

In this method, the toner image on the transfer material is softened and pressed by a heated roller, so the strength of the fixed image is excellent.

However, since the fixing roller is heated by an electric heater, a heating-up time is required from when the switch is turned on until copying is possible, and furthermore, it is necessary to constantly heat the fixing roller to a high temperature.

Therefore, most printers and copying machines that employ the thermal fixing method consume more than 1 kW of power, and more than half of that power is consumed to heat the fixing device.

On the other hand, the pressure fixing method does not require the above-mentioned waiting time, does not consume electrical energy for heating, and has advantages such as requiring a simple structure of the fixing device. However, with conventional pressure fixing toner, a pressure as high as 30Ω/cm is not applied to the pressure roller (if it is pushed, a good fixed image cannot be obtained, and applying such a high pressure is difficult for paper). curl,
It has the disadvantage of causing gloss and wrinkles.

Therefore, there is a strong desire to develop a toner that can be fixed at the lowest possible pressure. As a means to solve these problems, a so-called capsule toner in which a core material that can be fixed at low pressure is wrapped in a shell material such as resin has been proposed.

For example, a solid lobe cell toner manufactured by phase separation as disclosed in JP-A-51-80235, and capsules manufactured by an interfacial polymerization method as disclosed in JP-A-51-119231. toner is known.

However, capsule toners produced by conventionally known interfacial polymerization methods do not necessarily have various properties originally required as toners. One of the reasons for this is that the toner does not have sufficient strength and is easily destroyed by stress, friction, etc. when mixed with a carrier. In other words, since the capsule toner has a structure in which a hard shell encloses a substance that is easily plastically deformed by a slight force, such as a resin solution or soft wax, the strength of the toner can be said to depend almost entirely on the shell. In order to obtain strength, the shell may be made thicker, but this would make the shell less likely to be destroyed by pressure, and the content of the fixing component in the toner would decrease, resulting in poor fixing.

As a means of increasing the strength of the shell without making it thicker, attempts have been made to reinforce the shell with inorganic particles, resin particles, etc.
56@, 62-2833'16, 62'-283
Publication No. 347).

[Problems to be Solved by the Invention] It is possible to increase the strength of the capsule toner by reinforcing the shell with inorganic fine particles, resin fine particles, etc. as described above, but it is destroyed in the developing device and causes a filming phenomenon on the photoreceptor. There was a problem that the strength was still insufficient, such as easily causing damage.

The inventor of the present invention has made intensive studies to solve the above problems and obtain a capsule toner that is strong enough not to be destroyed even in a developing machine, and has found that it is difficult to obtain strength from the shell alone, and it is necessary to have strength from the core. As a result of further investigation based on this knowledge, we found that if the core is made into a gel, a capsule toner with the strength that will not be destroyed even in the developing machine while retaining the fixing properties of the core was obtained. The present invention has been achieved based on the discovery that this can be obtained.

Means for Solving the Problems That is, the present invention provides a capsule toner in the form of a capsule consisting of a core material containing a fixing component and a coloring component and an outer shell surrounding the core material. The outer shell is formed around the core material by an interfacial polymerization method or an in-situ U polymerization method, and the fixing component in the core material is composed of a gel-like resin solution or resin dispersion. It is a capsule toner with

In the present invention, the fixing component can be made into a gel-like resin solution or resin dispersion by adding a gelling agent to the resin solution or resin dispersion, or by adding a gelling agent to a resin solution or resin dispersion that easily gels around room temperature. Examples include, but are not limited to, a method using as the main component of the core.

When adding a gelling agent to the resin solution or resin dispersion,
Naphthenic acid, oleic acid, lauric acid as gelling agents,
Metal salts such as stearic acid and octylic acid, 12-hydroxystearic acid, N-lauroyl-L-glutamic acid-α and γ-di-n-butylamide, and the like can be used.

The amount of the gelling agent added is preferably 1 to 20 parts by weight, more preferably 1 to 10 parts by weight, and most preferably 3 to 10 parts by weight per 100 parts by weight of the resin solution or resin dispersion. Department. If it is less than 1 part by weight, it will be difficult to form a sufficient gel, and if it is more than 20!1 parts, the gel will lose its tackiness and its fixing properties will deteriorate.

After shell formation, heating may be applied to promote gelation. The heating temperature is preferably 30 to 100'C, more preferably 50 to 80'C.

Various resins can be used for the resin solution or resin dispersion to which the gelling agent is added, such as ethylene-vinyl acetate copolymer, ethylene-acrylic ester copolymer, and ethylene-methacrylic ester copolymer. , coumaron-indene copolymer, polyolefin, olefin copolymer, styrene resin, styrene-acrylic ester copolymer, styrene-methacrylic ester copolymer, styrene-butadiene copolymer, epoxy resin, polyester, rubber polyvinylpyrrolidone, polyamide, methyl vinyl ether-maleic anhydride copolymer, maleic acid-modified phenolic resin, silicone resin, epoxy-modified phenolic resin, natural resin-modified phenolic resin, amine resin, polyurethane, acrylic acid ester homopolymer or copolymer. Examples thereof include polymers, homopolymers or copolymers of methacrylic acid esters, polyvinyl chloride, chlorinated polyolefins, polyvinyl acetate, polyvinyl formal, and polyvinyl butyral.

In addition, when using a resin solution or resin dispersion that tends to gel around room temperature, examples of resins that tend to gel around room temperature include polyethylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid ester copolymer, and ethylene-vinyl acetate copolymer.
Examples include low molecular weight resins consisting of at least one kind such as methacrylic acid copolymers, and homopolymers or copolymers of methacrylic esters having long chain alkyl ester groups such as stearyl methacrylate.

The molecular weight of the low molecular weight resin is 30 in number average molecular weight.
It is preferably selected in the range of 0 to 10,000, more preferably 500 to 6,000. most preferably 1,000
~3,000.

In addition, when using the above homopolymer or copolymer,
Number average molecular weight 5.0 from the point of room temperature assimilation and fixability, etc.
It is better to use a value of 00 or more.

The organic solvent for dissolving or dispersing these resins is not particularly limited, but preferably has a boiling point of 100 to 350°C that does not dissolve or swell the shell that will be formed in the subsequent process and has good gel-forming properties. It is better to use organic solvents. It is more preferable to use one having a boiling point of 150 to 300°C, most preferably one having a boiling point of 150 to 250'C.

If a temperature lower than 100° C. is used, the solvent volatilizes to a large extent, making it inconvenient to handle. If a temperature higher than 350° C. is used, the evaporation of the solvent after fixing is delayed, resulting in poor fixing performance. Examples of darkening organic solvents include nonane, decane, dodecane, phenylxylylethane,
Diethyl diphenyl, ``Isopar'' H (hydrocarbon manufactured by Exxon Chemical), naphtha No. 6 (manufactured by Exxon Chemical),
Examples include "'Shell Sole" 71 (Hydrocarbon manufactured by Shell Chemical Co., Ltd.).

The optimal amount of resin in the resin solution or resin dispersion varies depending on the type and molecular weight of the resin, but from the viewpoint of securing the strength of the fixed image and the fluidity or fixing properties of the core component, the resin solution or resin dispersion is 10 to 9 per 100 parts by weight of liquid
It is preferable to use 0 parts by weight, more preferably 20 to 80 parts by weight.
Parts by weight are preferably used, most preferably from 30 to 70 parts by weight.

A coloring agent may be added to the toner of the present invention if necessary. As the colorant, various pigments and dyes used in conventional toners can be used, such as carbon black, nigrosine dye, lamp black, aniline blue, phthalocyanine blue, ultramarine blue, chrome yellow, and benzidine yellow. , yellow lead, red iron oxide, rhodamine lake red, chrome green, malachite green, or a mixture thereof.

These colorants are preferably added so as to form a visible image of sufficient density, and are usually used in an amount of 1 to 20 parts by weight per 100 parts by weight of the toner.

When the toner of the present invention is used as a magnetic toner, the magnetic material used is a metal or alloy exhibiting ferromagnetism such as iron, cobalt, or nickel, including ferrite and magnetite, or a compound containing these elements, or a ferromagnetic material. Alloys that do not contain ferromagnetic elements but do not exhibit ferromagnetism after appropriate heat treatment, such as manganese-copper-aluminum,
Examples include manganese-copper and chromium dioxide.

In this case, the magnetic material also plays the role of a coloring agent. The content of these magnetic substances is preferably 5 to 100 parts by weight of toner.
It is 80 parts by weight, more preferably 30 to 60 parts by weight.

Note that when a magnetic substance is contained in a toner, it may be used as it is, that is, untreated, or it may be used after being treated with a silane-based or titanium-based coupling agent.

The toner shell of the present invention can be formed by interfacial polymerization method or In-5itu method.
This can be carried out by known microcapsule manufacturing methods such as polymerization, but interfacial polymerization is particularly preferred.

The interfacial polymerization method involves polycondensing a reactant, which is added to each liquid separately, at the interface of two mutually incompatible liquids, forming a polymer film that is insoluble in both liquids at the interface. The phase often contains acid chloride, isocyanate, etc., and the aqueous phase contains amines, alcohols, etc. Examples of these include JP-A-54-76
No. 233, No. 57-179860, Special Publication No. 38-19
It is described in publications such as No. 578. Also in-situ
The polymerization method involves mixing the core material and the shell material in advance, dispersing them in water, and then proceeding with the polymerization reaction to form a polymer film around the core material.
It is described in publications such as No.-9168 and No. 49-45133.

As raw materials for forming the shell of the toner used in the present invention, known materials, such as combinations of materials that undergo polymerization and curing reactions, can be used. For example, polyfunctional isocyanate and polyfunctional amine, polyfunctional isocyanate and polyfunctional alcohol, polyfunctional acid chloride and polyfunctional amine, polyfunctional acid chloride and polyfunctional phenol, epoxy resin and polyfunctional amine. and epoxy resins and polyfunctional alcohols.

Particularly preferred among the combinations of the above substances are polyfunctional isocyanates and polyfunctional amines.

Examples of polyfunctional isocyanates include hexamethylene diisocyanate, p-phenylene diisocyanate, m-phenylene diisocyanate, 2°4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 3,3
'-dimethyl-diphenyl-4,4-diisocyanate, diphenylmethane-4,4-diisocyanate,
3,3'-dimethyl-diphenylmethane-4,4'-diisocyanate, naphthalene-1,5-diisocyanate, triphenylmethane-triisocyanate, polymethylene polyphenylisocyanate, adduct of hexanetriol and hexamethylene diisocyanate, tolylene diisocyanate Examples include adducts of isocyanate and trimethylolpropane, and adducts of xylylene diisocyanate and tolylene diisocyanate, which can be used alone or in combination.

These polyfunctional isocyanates are preferably used in an amount of 5 to 30 parts by weight, more preferably 5 to 20 parts by weight, based on 100 parts by weight of the toner. If it is less than 5 parts by weight, the resulting shell will be too thin and the core will not be sufficiently protected. Also 3
If the amount is more than 0 parts by weight, the shell becomes too thick and inhibits toner fixing performance.

To produce the toner of the present invention, first, a gelling agent is added to a resin solution or resin dispersion and a colorant, if necessary, and then the mixture is uniformly mixed using a stirrer such as a sand grinder. At this time, it can be heated if necessary. The heating temperature is preferably 30 to 100°C, more preferably 40 to 50°C.

Next, a polyfunctional isocyanate for forming a cured layer is added to the above uniform mixture and mixed uniformly to prepare a raw material mixture.

The raw material mixture thus obtained is then micronized in water to a desired particle size using a homomixer or the like. The size of the fine particles is preferably 3 to 30 μm, more preferably 5 to 20 μm.

It is preferable to add a dispersion stabilizer in order to prevent agglomeration of fine particles and to make the size of fine particles uniform in the step of making fine particles. Usable dispersion stabilizers include gelatin, polyvinyl alcohol, gum arabic, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, water-soluble polymers such as polyacrylates, colloidal silica, colloidal alumina, calcium phosphate, aluminum hydroxide, Examples include inorganic fine particles such as calcium carbonate, barium carbonate, barium fjA acid, and bentonite, cationic surfactants, anionic surfactants, and nonionic surfactants.

A polyfunctional amine is added to the dispersion thus obtained to cause a polymerization reaction to form a shell.

As the polyfunctional amine, ethylenediamine, hexamethylenediamine, diethylenetriamine, phenylenediamine, xylylenediamine, triethylenetetramine, piperazine, 2,5-dimethylpiperazine, etc. can be used.

The amount of the polyfunctional amine added is preferably 0.5 to 2 parts by weight, more preferably 0.5 to 2 parts by weight, per 10 parts by weight of the polyfunctional isocyanate, from the viewpoint of sufficient shell formation and economical efficiency. It is 7 to 1.3 parts by weight.

After separating the toner from the toner dispersion obtained as described above and washing it with water, a capsule toner can be obtained by drying the toner particles.

In order to further improve the triboelectric charging properties of the obtained capsule toner and to prevent toner charging defects, transfer defects, etc., it is preferable to subject the obtained capsule toner to a hydrophobic treatment.

Here, the method of hydrophobization treatment is to dissolve or suspend a substance that is reactive with unreacted amino groups or hydroxyl groups on the film surface in an organic solvent or water, and disperse the toner in this solution or suspension. This can be done by separating and drying the toner after reaction, or by placing the toner in an atmosphere of a substance that is reactive with hydroxyl groups and amino groups. Since the toner can be blocked, a toner with high surface electrical resistance and stable triboelectric charging properties can be obtained.

(Substances that chemically bond with amino groups and hydroxyl groups) Ethyl isocyanate, n-propylisocyanate, 1SO-
Propyl isocyanate, n-butyl isocyanate, t
Isocyanates such as ert-butyl isocyanate, cyclohexyfuryisocyanate, phenyl isocyanate, m-chlorophenyl isocyanate, O-chlorophenylisocyanate, acetic anhydride, propionic anhydride, butyric anhydride, hexanoic anhydride, aconitic anhydride,
Acid anhydrides such as benzoic anhydride, itaconic anhydride, hebutafluorobutyric anhydride, perfluoropropionic anhydride, trifluoroacetic anhydride, pistrifluoroacetamide, N
-Methylbis(trifluoroacetamide), N, 0-
Acetamide derivatives such as bis(trimethylsilyl)acetamide and N-trimethylsilylacetamide, imidazole derivatives such as N-acetylimidazole, N-pentafluoroimidazole, trifluoroacetylimidazole, phosgene, acetyl chloride, trifluoroacetyl chloride, propionyl chloride, chloride Acid chlorides such as butyryl, hexoyl chloride, benzoyl chloride, chlorobenzoyl chloride, phthaloyl chloride, fumaryl chloride, benzenesulfonyl chloride, allyl glycidyl ether, glycidyl methyl nitrate, 1,2-propylene oxide, 1,
Epoxy compounds such as 3-butadiene dieboxide and ethylene glycol diglycidyl ether; acetylene dicarboxylic acid esters such as dimethyl acetylene dicarboxylate, diethyl acetylene dicarboxylate, and diphenyl acetylene dicarboxylate; silane compounds such as trimethylchlorosilane and dimethyldichlorosilane. , γ-chloropropyltrimethoxysilane, vinyltrimethoxysilane, and other silane coupling agents. When performing hydrophobization treatment in the liquid phase, there are no particular restrictions on the organic solvent as long as it does not have amino groups or hydroxyl groups in the molecule, but considering the ease of subsequent drying, organic solvents with a boiling point of 150
'C and below, such as hexadi, petroleum ether, ligroin, dichloromethane, chloroform, trichlene,
Preferred are ethyl acetate, benzene, toluene, acetone, methyl ethyl ketone, ethyl ether and tetrahydrofuran.

During the hydrophobization treatment, the amount of the substance reactive with the amino groups and hydroxyl groups is preferably added in the range of 0.1 to 20 parts by weight per 100 parts by weight of the toner.
More preferably 0.5 to 10 parts by weight, most preferably 1
~5 parts by weight.

Further, a catalyst may be added to efficiently carry out the above reaction. Typical catalysts include tertiary amines, tin compounds, and the like, such as triethylamine, triethylamine, pyridine, dibutyltin dilaurate, dibutyltin diacetate, dibdeltin maleate, tin laurate, and the like. The amount of catalyst added is preferably in the range of 0.001 to 10 parts by weight per 100 parts by weight of the substance reactive with amino groups and hydroxyl groups.

Furthermore, the reaction system may be heated in order to carry out the above reaction efficiently. The heating temperature is preferably selected within the range of 30 to 100°C.

[Examples] Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

Example 1 45q of a 30% solution of styrene-n-butyl acrylate copolymer (copolymerization ratio 70:30) of "Hytherm" PS5 (Phenylxylylethane Nippon Oil Co., Ltd.) and a magnetic material (EPT-1000) : 40 g of Toda Kogyo Co., Ltd.) and 5 g of 12-hydroxystearic acid were mixed in a sand grinder for 30 minutes, and then "Coronate" L (polyfunctional isocyanate 1 to 1: made by Nippon Polyurethane Co., Ltd.) was mixed in a sand grinder for 30 minutes.
5Q and 40 g of ethyl acetate were added and mixed for 5 minutes to obtain a toner raw material composition.

This raw material composition was mixed into a 1% aqueous solution of polyvinyl alcohol.
00ml was dispersed and made into fine particles using a homo mixer (manufactured by Tokushu Kika Kogyo) to obtain a dispersion having an average particle size of 12μ. While stirring the dispersion, 50 CI of a 2% diethylenetriamine aqueous solution was added dropwise for 15 minutes. After the dropwise addition, the temperature was raised to 60'C and stirred for 4 hours to perform encapsulation and gelation of the core.

The thus obtained capsule dispersion was washed with 2U of distilled water using a centrifugal separator, dried in a hot air dryer at 50'C for 5 hours, and a capsule toner was obtained.

Disperse this capsule toner 30Q in acetone 70Q,
To this dispersion were added 1 q of phenylene isocyanate and 0.0 q of dibutyltin dilaurate. A hydrophobically treated capsule toner was obtained by adding On and stirring for 1 hour to obtain a hydrophobically treated capsule toner.

This toner was mixed with iron powder carrier (TSV-200: Japanese iron powder) to prepare a developer with a concentration of 5%, and the amount of charge was measured using a blow-off charge amount meter TB-500 (manufactured by Toshiba Chemical Corporation). The result was 8.4 μC/g.

When this toner was imaged using a magnetic brush developing machine, an image with an image density of 1.2 was obtained, and no destruction of the toner was observed within the developing machine. Also, apply a linear pressure of 15 kg to the unfixed image.
When fixing was performed using a pressure fixing machine with a pressure of /cm, the fixing properties were good.

Example 2 Ethyl methacrylate-stearyl methacrylate copolymer (copolymerization ratio 20:80) "'isopar" M
(Aliphatic hydrocarbon: After mixing 30% solution 45Q manufactured by Exxon, magnetic material (EPTiooo) 40C1, and 10 g of aluminum octylate with a sand grinder for 30 minutes,
Zarani "Coronate" L '150 and ethyl acetate 50
Q was added and mixed for 5 minutes to obtain a toner raw material composition.

This raw material composition was mixed into a 1% aqueous solution of polyvinyl alcohol.
00ml was dispersed and made into fine particles using a homo mixer (manufactured by Tokushu Kika Kogyo) to obtain a dispersion having an average particle size of 13μ. While stirring the dispersion, a 2% diethylenetriamine aqueous solution (50C) was added dropwise over 15 minutes, and after the dropwise addition, the temperature was raised to 60'C and stirred for 4 hours to encapsulate and gel the core.

The capsule dispersion obtained in this way was washed with 2α distilled water using a centrifugal valve machine and then sent to each house at 50°C.
A capsule toner was obtained by drying in a hot air dryer for 5 hours.

This capsule toner (30 Cl) was dispersed in acetone (70 Cl), phenyl isocyanate 19 and dibutyltin dilaurylate (1 to 0.04 g) were added to this dispersion, and the mixture was stirred for 1 hour for hydrophobic treatment, and then separated and dried to make it hydrophobic. A treated capsule toner was obtained.

This toner was mixed with an iron powder carrier (D5V-200: Japan Iron Powder) to prepare a developer with a concentration of 5%, and the amount of charge was measured in the same manner, and it was found to be -8.1 μC/q.

When this toner was imaged using a magnetic brush developing device, an image with an image density of 1.2 was obtained, and no destruction of the toner was observed within the developing device. In addition, the unfixed image was fixed at a linear pressure of 15 kQ.
/Cm pressure fixing machine, the fixing properties were good.

Example 3 Stearyl methacrylate monomer (Tokyo Kasei Kogyo Co., Ltd. 70c+) and 30g of "'Isopar" M were placed in a three-necked flask with a cooling tube, 1q of asobisisobutylnitrile was added thereto, and the mixture was heated at 80°C for 5 hours while stirring with a stirring bar. Polymerization occurred. When the solution was cooled after polymerization, it solidified into a waxy state.

The number average molecular weight of the polymer in this solidified product was measured by GPC method and was found to be 10,000.

After mixing this solid 45C1 and EPT-1000400 for 300 minutes with a sand grinder, 115 g of "'Coronate" and 40 g of ethyl acetate were added and mixed for 5 minutes.
A toner raw material composition was obtained.

This raw material composition was encapsulated and hydrophobized in the same manner as in Example 1, and then the amount of charge was measured in the same manner and found to be -9.2 μC/g.

When this toner was imaged using a magnetic brush developing device, an image with an image density of 1.2 was obtained, and no destruction of the toner was observed within the developing device. Also, apply a linear pressure of 15 kg to the unfixed image.
When fixing was performed using a pressure fixing machine with a pressure of /cm, the fixing properties were good.

Comparative Example 1 A capsule toner was obtained in the same manner as in Example 1 except that 12-hydroxystearic acid was not used.

The charge amount of this toner was measured in the same manner as in Example 1, and it was found to be -6.8 μC/Q. Furthermore, when this developer was observed using a scanning electron microscope, many pieces of toner were found to be destroyed. When this toner was imaged using a magnetic brush developing device, destruction of the toner was observed on the magnetic sleeve in the developing device and on the cleaning blade.

Comparative Example 2 A capsule toner was obtained in the same manner as in Example 1 except that aluminum octylate was not used. When the charge amount of this toner was measured in the same manner, it was -4°2 μC/g.

When this developer was observed using a scanning electron microscope, it was found that most of the toner was destroyed. When this toner was imaged using a magnetic brush developing device, it was found that the toner was destroyed on the magnetic sleeve in the developing device and on the cleaning blade.

[Effects of the Invention] According to the present invention, in a capsule toner consisting of a core material and an outer shell covering the periphery of the core material, the fixing properties of the core are improved by making the fixing component in the core material into a gel state. The strength can be significantly improved while being maintained, and a capsule toner with sufficient strength that will not be destroyed even in a developing device can be obtained. Furthermore, by subjecting the outer shell surface to hydrophobic treatment, a capsule toner having high surface resistance and stable triboelectric charging properties can be obtained.

Claims (1)

[Scope of Claims] 1. A capsule toner in the form of a capsule consisting of a core material containing a fixing component and a coloring component and an outer shell surrounding the core material, the outer shell being formed by an interfacial polymerization method. or i
A capsule toner formed around the core material by an n-situ polymerization method, wherein the fixing component in the core material is a gel-like resin solution or resin dispersion. 2. The capsule toner according to claim 1, wherein the outer shell surface is hydrophobically treated.