JP6458419B2 - Bright toner, electrostatic charge image developer, toner cartridge, image forming method, and image forming apparatus - Google Patents

Description

  The present invention relates to a glitter toner, an electrostatic charge image developer, a toner cartridge, an image forming method, and an image forming apparatus.

Methods for visualizing image information through an electrostatic charge image, such as electrophotography, are currently used in various fields.
In conventional electrophotography, an electrostatic latent image is formed on a photosensitive member or an electrostatic recording body by using various means, and electro-sensitive particles called toner are attached to the electrostatic latent image to form an electrostatic latent image. Generally, a method of visualizing through a plurality of steps of developing an image (toner image), transferring it to the surface of a transfer medium, and fixing it by heating or the like is generally used.
Among toners, glittering toner is used for the purpose of forming an image having a brightness such as metallic luster.
As an example of the glittering toner, for example, a toner containing at least a binder resin and a metal powder sufficient to exhibit a metallic luster is known (see, for example, Patent Document 1).
In addition, a toner using a pigment obtained by coating a thin layer of titanium dioxide on a flaky inorganic crystal substrate as a colorant is known (see, for example, Patent Document 2).
Further, when a solid image is formed, the reflectance A at a light receiving angle of + 30 ° and a light receiving angle of −30 ° measured when the image is irradiated with incident light having an incident angle of −45 ° by a goniophotometer. A toner having a ratio (A / B) of 2 to 100 with respect to the reflectance B is known (see Patent Document 3).

As a conventional toner, a toner described in Patent Document 4 is known.
Patent Document 4 discloses at least a heating body fixed at a predetermined position, a fixing belt having an elastic layer having a rubber hardness of 10 to 50 ° according to JIS-A, which is in pressure contact with the heating body, and a temperature detection unit. The recording material is brought into close contact with the heating body through the fixing belt while adjusting the temperature by bringing the temperature detecting means into contact with the inner surface of the fixing belt, and the toner image on the recording material is applied to the recording material. The toner is applied to an image forming apparatus provided with a heat fixing device for heat fixing, and the toner includes the following (a) to (e):
(A) The toner contains 0.5 to 30% by weight of a low softening point substance.
(B) The weight average molecular weight (Mw) in the molecular weight distribution measured by gel permeation chromatography (GPC) of the tetrahydrofuran (THF) soluble content of the toner is 10,000 to 1,000,000, and the weight average The ratio (Mw / Mn) of molecular weight (Mw) to number average molecular weight (Mn) is 3 to 20,
(C) The insoluble content of the toner by Soxhlet extraction with a tetrahydrofuran solvent is 3 to 30% by weight.
(D) storage elastic modulus at a temperature of 50 ° C. of the toner (G _'50) and a storage modulus at a temperature 100 ° C. of the toner (G' ratio of _{100) (G '50 / G} ' 100) is 5,000～70 , 000,
(E) The storage elastic modulus (G ′ ₁₅₀ ) of the toner at a temperature of 150 ° C. is 1 × 10 ³ to 1 × 10 ⁵ (dN / m ² ).
A toner characterized by satisfying the above is described.

JP-A-62-67558 JP-A-62-100769 JP 2012-32765 A JP 2009-86690 A

  An object of the present invention is to provide a glittering toner that is excellent in glitter of an image to be obtained and in which no aromatic hydrocarbon oozes out on a recording medium after image formation.

The above-described problems of the present invention have been solved by means described in the following <1> and <5> to <9>. It is described below together with <2> to <4> which are preferred embodiments.
<1> A bright pigment and an aromatic hydrocarbon having 9 to 32 carbon atoms, and the content of the aromatic hydrocarbon having 9 to 32 carbon atoms is 0.5 to A glittering toner characterized by being 1.2% by weight;
<2> The glitter toner according to <1>, wherein the glitter pigment is an aluminum pigment.
<3> The bright toner according to <1> or <2>, and an electrostatic charge image developer containing a carrier,
<4> A toner cartridge that is detachable from the image forming apparatus and contains the glitter toner according to <1> or <2>,
<5> A latent image forming step of forming an electrostatic latent image on the surface of the image carrier, a developing step of developing the electrostatic latent image formed on the surface of the image carrier with toner to form a toner image, and the toner image And a fixing step for fixing the toner image transferred to the surface of the transfer material, wherein the toner is the glittering toner according to <1> or <2>. An image forming method,
<6> An image holding member, a charging unit that charges the image holding member, an exposure unit that exposes the charged image holding member to form an electrostatic latent image on the surface of the image holding member, and the static with toner. A developing unit that develops the electrostatic latent image to form a toner image, a transfer unit that transfers the toner image from the image holding member to the surface of the transfer target, and a toner image transferred to the surface of the transfer target are fixed. An image forming apparatus, wherein the toner is the glitter toner according to <1> or <2>.

According to the invention described in <1> above, no bright pigment is contained, or the aromatic hydrocarbon having 9 to 32 carbon atoms is added in an amount of 0.5 to 1.2% by weight based on the total weight of the toner. There is provided a glittering toner which is excellent in the glitter of an image obtained compared to the case where it is not contained and in which no aromatic hydrocarbon oozes out to a recording medium after image formation.
According to the invention described in the above <2>, there is provided a glitter toner that is superior in the glitter of the obtained image as compared with the case where the glitter pigment is not an aluminum pigment.
According to the invention described in the above <3>, the toner does not contain a bright pigment or an aromatic hydrocarbon having 9 to 32 carbon atoms is added in an amount of 0.5 to 1. Provided is an electrostatic charge image developer that is excellent in the brightness of an image obtained compared to the case where 2% by weight is not contained and in which no aromatic hydrocarbon oozes out on a recording medium after image formation.
According to the invention described in the above <4>, the toner does not contain a luster pigment or an aromatic hydrocarbon having 9 to 32 carbon atoms is added in an amount of 0.5 to 1. Provided is a toner cartridge that contains glitter toner that is superior in glitter of the resulting image and does not show any seepage of aromatic hydrocarbons on the recording medium after image formation as compared with the case where 2% by weight is not contained. Is done.
According to the invention described in the above <5>, the toner does not contain a luster pigment or an aromatic hydrocarbon having 9 to 32 carbon atoms is added in an amount of 0.5 to 1. Provided is an image forming method in which the resulting image is excellent in glitter as compared with the case where 2% by weight is not contained, and no aromatic hydrocarbon oozes out on the recording medium after image formation.
According to the invention described in <6>, the toner does not contain a luster pigment or an aromatic hydrocarbon having 9 to 32 carbon atoms is added in an amount of 0.5 to 1. As compared with the case where the content is not 2% by weight, there is provided an image forming apparatus which is excellent in the brightness of the obtained image and in which no aromatic hydrocarbon oozes out on the recording medium after image formation.

FIG. 4 is a plan view and a side view schematically showing an example of the electrostatic image developing toner of the present embodiment. FIG. 2 is a cross-sectional view schematically illustrating an example of an electrostatic charge image developing toner according to an exemplary embodiment. 1 is a schematic configuration diagram illustrating an example of an image forming apparatus according to an exemplary embodiment. It is a schematic block diagram which shows an example of the process cartridge of this embodiment.

Hereinafter, the present embodiment will be described.
In the present embodiment, the description “A to B” represents not only a range between A and B but also a range including A and B at both ends thereof. For example, if “A to B” is a numerical value range, “A or more and B or less” or “B or more and A or less” is represented.

(Brightness toner)
The glitter toner of this embodiment (hereinafter also simply referred to as “toner”) contains a glitter pigment and an aromatic hydrocarbon having 9 to 32 carbon atoms, and the aromatic carbon having 9 to 32 carbon atoms. The hydrogen content is 0.5 to 1.2% by weight based on the total weight of the toner.
Note that “brightness” in the present embodiment indicates that the image formed with the toner has a brightness such as a metallic luster when visually recognized.

As a result of detailed studies by the present inventors, it has been found that a toner image formed from a toner containing a bright pigment has a problem that the bright pigment is oxidized with time and the toner image is discolored.
As a result of intensive studies, the inventors of the present invention have excellent luster of an image obtained by adding a luster pigment and a specific amount of an aromatic hydrocarbon having 9 to 32 carbon atoms. It was found that no aromatic hydrocarbon oozes out on the recording medium, and the present invention has been completed.
Although the detailed mechanism is unknown, the present inventors have covered the surface of the glitter pigment with an aromatic hydrocarbon and / or the aromatic hydrocarbon dispersed in the toner functions as a material for suppressing oxidation, It is estimated that the deterioration of the resin due to oxidation of the metal pigment, active oxygen, etc. is suppressed and the resulting image has excellent glitter.
Hereinafter, each component and physical property value constituting the toner will be described in detail.

<Brightness pigment>
The glitter toner of the present embodiment contains a glitter pigment.
Examples of the glitter pigment include metal pigments and pearl pigments.
Examples of the bright pigment include metal powders such as aluminum, brass, bronze, nickel, stainless steel, zinc, copper, silver, gold, and platinum, mica coated with titanium oxide and yellow iron oxide, barium sulfate, and layered silicate. Coated flaky inorganic crystal substrate such as layered aluminum silicate, monocrystalline plate-like titanium oxide, basic carbonate, bismuth oxyoxychloride, natural guanine, flaky glass powder, flaky glass powder with metal vapor deposition, etc. There is no particular limitation as long as it has glitter. Among these, from the viewpoints of cost, stability, availability, and glitter, metal pigments are preferable, aluminum pigments are more preferable, and aluminum metal simple substance metal pigments are particularly preferable.
The number average primary particle size of the glitter pigment is preferably 0.1 to 100 μm, more preferably 5 to 35 μm, still more preferably 5 to 25 μm, and particularly preferably 7 to 20 μm. preferable.
Further, the shape of the glitter pigment is preferably scaly (flat) or flat, more preferably scaly, and the glitter pigment is more metallic than the average maximum thickness of the glitter pigment. It is preferable that the average equivalent circle diameter of the pigment is long.
The scaly particles mean particles having a substantially flat surface (XY plane) and a substantially uniform thickness (Z). Here, the major axis on the plane of the scaly particles is defined as X, the minor axis is defined as Y, and the thickness is defined as Z. The XY plane is a surface that gives the maximum projected area.
The equivalent circle diameter is the diameter of the circle when assuming that the substantially flat surface (XY plane) of the tabular grain is a circle having the same projected area as the projected area of the grain. When the substantially flat surface (XY plane) of a tabular grain is a polygon, the diameter of the circle obtained by converting the projected surface of the polygon into a circle is the equivalent circle diameter of the tabular grain. It is said.
Further, the average number of glitter pigments contained in the toner is not particularly limited, but is preferably 1 to 5, and more preferably 1 to 3.

The glitter pigment may be contained singly or in combination of two or more.
The content of the glitter pigment in the glitter toner of the present embodiment is preferably 1 part by weight or more and 70 parts by weight or less, and more preferably 5 parts by weight or more and 50 parts by weight or less with respect to 100 parts by weight of the total weight of the toner. .

<Aromatic hydrocarbons having 9 to 32 carbon atoms>
The glittering toner of this embodiment contains an aromatic hydrocarbon having 9 to 32 carbon atoms, and the content of the aromatic hydrocarbon having 9 to 32 carbon atoms is 0.5 to 0.5 based on the total weight of the toner. 1.2% by weight.
The aromatic hydrocarbon having 9 to 32 carbon atoms is not particularly limited as long as it is a hydrocarbon compound having at least one aromatic ring and is a compound having 9 to 32 carbon atoms. Certain compounds are preferred.
Moreover, as carbon number of C9-32 aromatic hydrocarbon, it is preferable that it is 9-24, and it is more preferable that it is 9-16.
Furthermore, as an aromatic hydrocarbon having 9 to 32 carbon atoms, an aromatic hydrocarbon contained in mineral spirit is preferably exemplified.
Mineral spirit is a mixture mainly containing a large number of hydrocarbons having 9 to 16 carbon atoms, and is a mixture of aliphatic hydrocarbons and aromatic hydrocarbons.
The mineral spirit used in the present embodiment is preferably a mixture of hydrocarbon compounds having a boiling point in the range of 150 ° C to 290 ° C.
As the aromatic hydrocarbon having 9 to 32 carbon atoms other than mineral spirit, mono-hexaalkylbenzene is preferably exemplified, and benzene having an alkyl group having 3 to 26 carbon atoms or tri-hexamethylbenzene is more preferably exemplified. Benzene having an alkyl group having 3 to 18 carbon atoms or trimethylbenzene is more preferable, benzene having an alkyl group having 5 to 16 carbon atoms or trimethylbenzene is particularly preferable, and decylbenzene or Most preferred is trimethylbenzene. From the viewpoint of glitter, benzene having an alkyl group having 3 to 26 carbon atoms is preferred.

The aromatic hydrocarbon having 9 to 32 carbon atoms preferably includes at least mineral spirit and other aromatic hydrocarbon having 9 to 32 carbon atoms.
Other aromatic hydrocarbons having 9 to 32 carbon atoms to be combined with mineral spirits include aromatic hydrocarbons having 9 to 32 carbon atoms other than the mineral spirits, and preferred embodiments are also the same as described above.

The aromatic hydrocarbon having 9 to 32 carbon atoms in the glittering toner of the present embodiment may be contained singly or in combination of two or more, but may be contained in two or more. preferable. The occurrence of image streaks is further suppressed in the above aspect.
The content of the aromatic hydrocarbon having 9 to 32 carbon atoms in the glittering toner of the present embodiment is 0.5 to 1.2% by weight, and 0.5 to 1.1% by weight with respect to the total weight of the toner. %, More preferably 0.6 to 1.0% by weight, and still more preferably 0.8 to 1.0% by weight. Within the above range, the brightness of the obtained image is excellent, the bleeding of aromatic hydrocarbons to the recording medium after image formation is further suppressed, and the occurrence of image streaks is further suppressed.

  As a method for measuring the content of aromatic hydrocarbons having 9 to 32 carbon atoms in the glittering toner of the present embodiment, for example, the toner is dissolved in an appropriate solvent, filtered, and the filtrate is subjected to gas chromatography or gas chromatography. -A method of qualitatively quantifying with a mass spectrometer (GC-MS) and a method of directly pyrolyzing GCMS of a mineral spirit liquid with a pyrolyzer are preferred.

<Binder resin>
The toner of the exemplary embodiment preferably includes a binder resin.
Examples of the binder resin include polycondensation resins and addition polymerization resins. For example, polyolefin resins such as polyethylene and polypropylene, styrene resins mainly composed of polystyrene, poly (α-methylstyrene), and polymethyl. Examples include (meth) acrylic resins, styrene- (meth) acrylic copolymer resins, polyamide resins, polycarbonate resins, polyether resins, polyester resins, and copolymer resins mainly composed of methacrylate, polyacrylonitrile, and the like. .
Among these, a polyester resin is preferable as the binder resin. Since the polyester resin is hydrophilic, it is well dispersed during toner formation, and the europium colorant is taken into the toner base particles in a more uniform state.

As the polycondensation resin, for example, polyester resin and polyamide resin can be preferably exemplified, and in particular, a polyester resin obtained by using a polycarboxylic acid and a polyol as a polycondensable monomer. It is preferable.
Examples of the polycondensable monomer that can be used in this embodiment include polycarboxylic acids, polyols, hydroxycarboxylic acids, polyamines, and mixtures thereof. In particular, the polycondensable monomer is preferably a polyvalent carboxylic acid, a polyol, and further an ester compound (oligomer and / or prepolymer) thereof. After undergoing a direct ester reaction or transesterification reaction, a polyester is obtained. What obtains resin is good.
In the present embodiment, the polycondensation resin is obtained by polycondensation of at least one selected from the group consisting of polycondensable monomers, oligomers thereof and prepolymers. Is preferably used.

The polyvalent carboxylic acid is a compound containing two or more carboxyl groups in one molecule. Among these, dicarboxylic acid is a compound containing two carboxyl groups in one molecule. For example, oxalic acid, succinic acid, glutaric acid, maleic acid, adipic acid, β-methyladipic acid, azelaic acid, sebacic acid, Nonanedicarboxylic acid, decanedicarboxylic acid, undecanedicarboxylic acid, dodecanedicarboxylic acid, fumaric acid, citraconic acid, diglycolic acid, cyclohexane-3,5-diene-1,2-carboxylic acid, hexahydroterephthalic acid, malonic acid, pimeline Acid, peric acid, phthalic acid, isophthalic acid, terephthalic acid, tetrachlorophthalic acid, chlorophthalic acid, nitrophthalic acid, p-carboxyphenylacetic acid, p-phenylenediacetic acid, m-phenylenediacetic acid, o-phenylenediacetic acid, diphenyl Acetic acid, diphenyl-p, p'-dicarboxylic acid, naphth Ren-1,4-dicarboxylic acid, naphthalene-1,5-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, anthracene dicarboxylic acid, and cyclohexane dicarboxylic acid.
Examples of the polycarboxylic acid other than dicarboxylic acid include trimellitic acid, trimesic acid, pyromellitic acid, naphthalenetricarboxylic acid, naphthalenetetracarboxylic acid, pyrenetricarboxylic acid, pyrenetetracarboxylic acid, itaconic acid, glutaconic acid, Examples thereof include n-dodecyl succinic acid, n-dodecenyl succinic acid, isododecyl succinic acid, isododecenyl succinic acid, n-octyl succinic acid, n-octenyl succinic acid, and the like, and lower esters thereof. Furthermore, acid halides and acid anhydrides are not limited to this.
These may be used individually by 1 type and may use 2 or more types together.
In addition, a lower ester shows that the carbon number of the alkoxy part of ester is 1-8. Specific examples include methyl ester, ethyl ester, n-propyl ester, isopropyl ester, n-butyl ester, and isobutyl ester.

A polyol is a compound containing two or more hydroxyl groups in one molecule. Among these, diol is a compound containing two hydroxyl groups in one molecule. Specifically, for example, as diol, ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,11-undecanediol, 1,12-dodecanediol, 1,13-tridecanediol, 1,14-tetradecanediol, 1,18-octadecanediol, 1,14-eicosandecanediol, diethylene glycol, triethylene glycol , Dipropylene glycol, polyester Lenglycol, polypropylene glycol, polytetramethylene ether glycol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, 1,4-butenediol, neopentyl glycol, 1,4-cyclohexanediol, polytetramethylene glycol, Examples include hydrogenated bisphenol A, bisphenol A, bisphenol F, bisphenol S, and alkylene oxide (ethylene oxide, propylene oxide, butylene oxide, etc.) adducts of the above bisphenols. Among these, preferred are alkylene glycols having 2 to 12 carbon atoms and alkylene oxide adducts of bisphenols, and particularly preferred are alkylene oxide adducts of bisphenols and alkylene glycols having 2 to 12 carbon atoms. It is combined use with.
Moreover, in order to make water dispersibility easy, a 2, 2- dimethylol propionic acid, a 2, 2- dimethylol butanoic acid, a 2, 2- dimethylol valeric acid etc. are illustrated, for example.

Examples of trihydric or higher alcohols include glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, hexamethylolmelamine, hexaethylolmelamine, tetramethylolbenzoguanamine, tetraethylolbenzoguanamine, sorbitol, trisphenol PA, phenol novolac, Examples thereof include cresol novolac, and alkylene oxide adducts of the above trivalent or higher polyphenols. These may be used individually by 1 type and may use 2 or more types together.
In addition, an amorphous resin or a crystalline resin can be easily obtained by combining these polycondensable monomers.

  Hydroxycarboxylic acid can also be used. Specific examples of the hydroxycarboxylic acid include hydroxyheptanoic acid, hydroxyoctanoic acid, hydroxydecanoic acid, hydroxyundecanoic acid, malic acid, tartaric acid, mucoic acid, and citric acid.

  Polyamines include ethylenediamine, diethylenediamine, 1,2-propanediamine, 1,3-propanediamine, 1,4-butanediamine, 1,4-butenediamine, 2,2-dimethyl-1,3-butane. Examples include diamine, 1,5-pentanediamine, 1,6-hexanediamine, 1,4-cyclohexanediamine, 1,4-cyclohexanebis (methylamine), and the like.

  The weight average molecular weight of the polycondensation resin obtained by polycondensation of the polycondensable monomer is preferably 1,500 or more and 40,000 or less, and preferably 3,000 or more and 30,000 or less. More preferred. When the weight average molecular weight is 1,500 or more, the cohesive force of the binder resin is good and the hot offset property is excellent, and when it is 40,000 or less, the hot offset property is excellent and the minimum fixing temperature is excellent. This is preferable. Further, it may be partially branched or cross-linked by selecting the carboxylic acid valence or alcohol valence of the monomer.

Moreover, it is preferable that the acid value of the polyester resin obtained is 1 mg * KOH / g or more and 50 mg * KOH / g or less. The first reason is that control of the particle size and distribution of the toner in the aqueous medium is indispensable for practical use as a high-quality toner, and the acid value is 1 mg · KOH / g or more. In the granulation step, sufficient particle size and distribution can be achieved, and when used in toner, sufficient chargeability can be obtained. Further, when the acid value of the polyester to be polycondensed is 50 mg · KOH / g or less, a sufficient molecular weight for obtaining image quality strength as a toner at the time of polycondensation can be obtained, and the chargeability of the toner under high humidity can be obtained. Is less dependent on the environment and has excellent image reliability.
Although there is no restriction | limiting in particular as a measuring method of an acid value, It is preferable to measure according to JISK0070.

When an amorphous polyester resin is used, the glass transition temperature Tg of the amorphous polyester resin is preferably 50 to 80 ° C, and more preferably 50 to 65 ° C. When the Tg is 50 ° C. or more, the cohesive force of the binder resin itself in a high temperature range is good, and thus the hot offset property is excellent during fixing. Further, when Tg is 80 ° C. or less, sufficient melting is obtained and the minimum fixing temperature is hardly increased.
The glass transition temperature of the binder resin refers to a value measured by a method (DSC method) defined in ASTM D3418-82.

Examples of the addition polymerizable monomer used for the preparation of the addition polymerization type resin include a cationic polymerizable monomer and a radical polymerizable monomer, and a radical polymerizable monomer is preferable.
As radically polymerizable monomers, styrenic monomers, unsaturated carboxylic acids, (meth) acrylates ("(meth) acrylate" means acrylate and methacrylate, and so on. N-vinyl compounds, vinyl esters, halogenated vinyl compounds, N-substituted unsaturated amides, conjugated dienes, polyfunctional vinyl compounds, polyfunctional (meth) acrylates, and the like. . Among these, N-substituted unsaturated amides, conjugated dienes, polyfunctional vinyl compounds, polyfunctional (meth) acrylates, and the like may cause a crosslinking reaction in the produced polymer. it can. These can be used alone or in combination.

Examples of the addition polymerizable monomer that can be used in this embodiment include a radical polymerizable monomer, a cationic polymerizable monomer, or an anion polymerizable monomer. Preferably there is.
The radically polymerizable monomer is preferably a compound having an ethylenically unsaturated bond, and has an aromatic ethylenically unsaturated compound (hereinafter also referred to as “vinyl aromatic”) or an ethylenically unsaturated bond. Carboxylic acids (unsaturated carboxylic acids), derivatives of unsaturated carboxylic acids such as esters, aldehydes, nitriles or amides, N-vinyl compounds, vinyl esters, halogenated vinyl compounds, N-substituted unsaturated amides, conjugated dienes, many It is more preferably a functional vinyl compound or a polyfunctional (meth) acrylate.

  Specifically, for example, unsubstituted vinyl aromatics such as styrene and p-vinylpyridine, α-substituted styrene such as α-methylstyrene and α-ethylstyrene, m-methylstyrene, p-methylstyrene, 2, Aromatic nucleus substituted styrene such as 5-dimethylstyrene, vinyl aromatics such as aromatic nucleus halogen substituted styrene such as p-chlorostyrene, p-bromostyrene, dibromostyrene, (meth) acrylic acid (in addition, “(meth) acrylic” "Means acrylic and methacrylic, and the same shall apply hereinafter.), Unsaturated carboxylic acids such as crotonic acid, maleic acid, fumaric acid, citraconic acid, itaconic acid, methyl (meth) acrylate, ethyl ( (Meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate Unsaturated carboxylic acid esters such as hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, glycidyl (meth) acrylate, benzyl (meth) acrylate, (meth) acrylaldehyde, (meth) acrylonitrile, (meth) acrylamide, etc. Unsaturated carboxylic acid derivatives, N-vinyl compounds such as N-vinyl pyridine and N-vinyl pyrrolidone, vinyl esters such as vinyl formate, vinyl acetate and vinyl propionate, vinyl chloride, vinyl bromide, vinylidene chloride, etc. Halogenated vinyl compounds, N-methylol acrylamide, N-ethylol acrylamide, N-propanol acrylamide, N-methylol maleamic acid, N-methylol maleamic acid ester, N-methylol maleimide, N-ethylo N-substituted unsaturated amides such as lumaleimide, conjugated dienes such as butadiene and isoprene, polyfunctional vinyl compounds such as divinylbenzene, divinylnaphthalene and divinylcyclohexane, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate , Propylene glycol di (meth) acrylate, tetramethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, hexamethylene glycol di (meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri ( (Meth) acrylate, glycerol di (meth) acrylate, glycerol tri (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythrito Tritri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol di (meth) acrylate, dipentaerythritol tri (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, Examples include polyfunctional acrylates such as dipentaerythritol hexa (meth) acrylate, sorbitol tri (meth) acrylate, sorbitol tetra (meth) acrylate, sorbitol penta (meth) acrylate, and sorbitol hexa (meth) acrylate. Moreover, the sulfonic acid and phosphonic acid which have an ethylenically unsaturated bond, and those derivatives can also be used. Among these, N-substituted unsaturated amides, conjugated dienes, polyfunctional vinyl compounds, polyfunctional acrylates, and the like can also cause a crosslinking reaction in the produced polymer. These addition polymerizable monomers may be used alone or in combination of two or more.

  Further, the content of the binder resin in the toner of the exemplary embodiment is preferably 10 to 90% by weight, more preferably 30 to 85% by weight, and more preferably 50 to 80% by weight with respect to the total weight of the toner. % Is more preferable.

<Release agent>
The toner of the exemplary embodiment preferably contains a release agent.
Specific examples of the release agent include, for example, ester wax, polyethylene, polypropylene, or a copolymer of polyethylene and polypropylene, but polyglycerin wax, microcrystalline wax, paraffin wax, carnauba wax, sazol wax, and montanic acid ester. Wax, deacidified carnauba wax, palmitic acid, stearic acid, montanic acid, blandic acid, eleostearic acid, valinalic acid and other unsaturated fatty acids, stearyl alcohol, aralkyl alcohol, bephenyl alcohol, carnauvyl alcohol, ceryl alcohol , Saturated alcohols such as long chain alkyl alcohols having a long chain alkyl group; polyhydric alcohols such as sorbitol; linoleic acid amides Fatty acid amides such as oleic acid amide and lauric acid amide; saturated fatty acid bisamides such as methylene bis stearic acid amide, ethylene bis capric acid amide, ethylene bis lauric acid amide, hexamethylene bis stearic acid amide, ethylene bis oleic acid amide, Unsaturated fatty acid amides such as hexamethylene bisoleic acid amide, N, N′-dioleyl adipic acid amide, N, N′-dioleyl sebacic acid amide; m-xylene bisstearic acid amide, N, N′— Aromatic bisamides such as distearyl isophthalic acid amide; fatty acid metal salts such as calcium stearate, calcium laurate, zinc stearate, magnesium stearate (generally called metal soap); aliphatic hydrocarbon wax and styrene Waxes grafted with vinyl monomers such as acrylic acid; Partially esterified products of fatty acids such as behenic acid monoglyceride and polyhydric alcohols; Methyl ester compounds having hydroxyl groups obtained by hydrogenation of vegetable oils, etc. Is mentioned.

The said mold release agent may be used individually by 1 type, or may use 2 or more types together.
The content of the release agent is preferably 1 to 20% by weight and more preferably 3 to 15% by weight with respect to 100% by weight of the binder resin. Within the above range, both good fixing and image quality characteristics can be achieved.

<Other colorants>
The toner of the present exemplary embodiment may contain a colorant other than the luster pigment as necessary.
As the other colorant, a known colorant can be used, and it may be arbitrarily selected from the viewpoints of hue angle, saturation, brightness, weather resistance, OHP permeability, and dispersibility in the toner.
Specifically, various pigments such as watch young red, permanent red, brilliantamine 3B, brilliantamine 6B, dapon oil red, pyrazolone red, resol red, rhodamine B lake, lake red C rose bengal, and acridine series , Xanthene, azo, benzoquinone, azine, anthraquinone, thioindico, dioxazine, thiazine, azomethine, indico, thioindico, phthalocyanine, aniline black, polymethine, triphenylmethane, diphenylmethane Examples thereof include various colorants such as those based on thiazine, thiazine, thiazole and xanthene.

  Other colorants include, for example, carbon black, nigrosine dye (CI No. 50415B), aniline blue (CI No. 50405), calco oil blue (CI No. azoic Blue 3), chrome yellow ( CINo.14090), Ultramarine Blue (CINo.77103), DuPont Oil Red (CINo.26105), Quinoline Yellow (CINo.47005), Methylene Blue Chloride (CINo.52015), Phthalocyanine Blue (CINo. 74160), malachite green oxalate (CI No. 42000), lamp black (CI No. 77266), rose bengal (CI No. 45435), and mixtures thereof can be preferably used.

The amount of other colorant used is preferably 0.1 to 20 parts by weight, more preferably 0.5 to 10 parts by weight, based on 100 parts by weight of the toner. Moreover, as a coloring agent, these pigments, dyes, etc. can be used individually by 1 type, or 2 or more types can be used together.
As a method for dispersing the other colorant, any method, for example, a general dispersion method such as a rotary shear type homogenizer, a ball mill having a medium, a sand mill, or a dyno mill can be used, and is not limited at all. . These colorant particles may be added to the mixed solvent at the same time as other particle components, or may be divided and added in multiple stages.

<External additive>
The toner of this embodiment may contain an external additive.
Examples of the external additive include inorganic particles and organic particles, and inorganic particles are preferable.
Examples of inorganic particles include silica, alumina, titanium oxide, barium titanate, magnesium titanate, calcium titanate, strontium titanate, zinc oxide, silica sand, clay, mica, wollastonite, diatomaceous earth, cerium chloride, Examples include Bengala, chromium oxide, cerium oxide, antimony trioxide, magnesium oxide, zirconium oxide, silicon carbide, and silicon nitride.
Among these, from the viewpoint of transferability and glitter of the resulting image, it is preferable that silica particles are included as the external additive, and it is particularly preferable that the external additive is silica particles.
The silica particles are preferably vapor phase silica.

It is preferable that the surface of the inorganic particles is previously hydrophobized. This hydrophobization treatment is more effective for improving the powder fluidity of the toner, as well as the environmental dependency of charging and the resistance to carrier contamination.
The hydrophobizing treatment may be performed by immersing the inorganic particles in a hydrophobizing agent. Although there is no restriction | limiting in particular as said hydrophobic treatment agent, For example, a silane coupling agent, a silicone oil, a titanate coupling agent, an aluminum coupling agent etc. are mentioned. These may be used individually by 1 type and may use 2 or more types together. Among these, silane coupling agents are preferable.

  Organic particles are generally used for the purpose of improving cleaning properties and transfer properties. Specifically, for example, fluorine resin powders such as polyvinylidene fluoride and polytetrafluoroethylene, fatty acid metal salts such as zinc stearate and calcium stearate. , Polystyrene, polymethyl methacrylate and the like.

The number average primary particle size of the external additive is preferably 5 to 300 nm, and more preferably 10 to 200 nm.
Moreover, an external additive may be used individually by 1 type, or may use 2 or more types together.
The content of the external additive is preferably in the range of 0.01 to 5 parts by weight and more preferably in the range of 0.1 to 3.0 parts by weight with respect to the total weight of the toner.

<Other ingredients>
In addition to the above components, various components such as an internal additive, a charge control agent, inorganic powder (inorganic particles), and organic particles may be added to the toner as necessary.
Examples of the internal additive include metals such as ferrite, magnetite, reduced iron, cobalt, nickel and manganese, alloys, and magnetic materials such as compounds containing these metals. When the magnetic material is used as a magnetic toner, the ferromagnetic particles preferably have an average particle size of 2 μm or less, more preferably about 0.1 to 0.5 μm. The amount contained in the toner is preferably 20 to 200 parts by weight with respect to 100 parts by weight of the resin component, and particularly preferably 40 to 150 parts by weight with respect to 100 parts by weight of the resin component. Further, it is preferable that the magnetic characteristics at the application of 10K oersted are those having a coercive force (Hc) of 20 to 300 oersted, saturation magnetization (σs) of 50 to 200 emu / g, and residual magnetization (σr) of 2 to 20 emu / g.

  Examples of the charge control agent include fluorine surfactants, salicylic acid metal complexes, metal-containing dyes such as azo metal compounds, polymer acids such as polymers containing maleic acid as a monomer component, and quaternary ammonium salts. And azine dyes such as nigrosine.

  The toner may contain an inorganic powder for the purpose of adjusting viscoelasticity. Examples of the inorganic powder include all inorganic particles usually used as an external additive on the toner surface, such as silica, alumina, titania, calcium carbonate, magnesium carbonate, calcium phosphate, and cerium oxide.

<Aspects and physical properties of toner>
The volume average particle diameter (D _50v ) of the toner of the exemplary embodiment is preferably 5 μm or more and 40 μm or less, more preferably 8 μm or more and 40 μm or less, and further preferably 10 μm or more and 20 μm or less. Within the above range, the occurrence of fog is small, and the particles are destroyed during cleaning, and the image carrier is prevented from being damaged.
The toner preferably has a narrow particle size distribution, and more specifically, the ratio of the 16% diameter (D _16p ) and the 84% diameter (D _84p ) in _terms of the square root in terms of the smaller number particle size of the toner. (GSDp), that is, GSDp represented by the following formula is preferably 1.40 or less, more preferably 1.31 or less, and particularly preferably 1.27 or less. Moreover, it is preferable that GSDp is 1.15 or more.
_{GSDp = {(D 84p) /} (D 16p)} 0.5
If the volume average particle size and GSDp are both in the above ranges, extremely small particles do not exist, and therefore, it is possible to suppress a decrease in developability due to an excessive charge amount of the small particle size toner.

A Coulter Multisizer II (manufactured by Beckman-Coulter) can be used for measuring the average particle diameter of particles such as toner. In this case, measurement can be performed using an optimum aperture depending on the particle size level of the particles. The particle diameter of the measured particle is expressed by a volume average particle diameter.
When the particle size is about 5 μm or less, the particle size can be measured using a laser diffraction / scattering particle size distribution measuring device (LA-700, manufactured by Horiba, Ltd.).
Furthermore, when the particle size is on the order of nanometers, it can be measured using a BET specific surface area measuring device (Flow Sorb II 2300, manufactured by Shimadzu Corporation).

In this embodiment, the toner shape factor SF1 is preferably in the range of 110 to 160, and more preferably in the range of 120 to 150. Within the above range, transfer unevenness in a high temperature and high humidity environment is further suppressed.
The shape factor SF1 is a shape factor indicating the degree of unevenness on the particle surface, and is calculated by the following equation.

In the formula, ML indicates the maximum length of the particle, and A indicates the projected area of the particle.
As a specific measurement method of SF1, for example, first, an optical microscope image of toner spread on a slide glass is taken into an image analysis device through a video camera, SF1 is calculated for 50 toners, and an average value is obtained. Is mentioned.

The glitter toner according to the present embodiment has a light receiving angle of + 30 ° measured when a solid image of toner is formed and irradiated with incident light having an incident angle of −45 ° by a goniophotometer. The ratio (A / B) between the reflectance A and the reflectance B at a light receiving angle of −30 ° is preferably 2 or more and 100 or less. It is excellent in the brightness of the image obtained as it is the said range.
The ratio (A / B) is preferably 20 or more and 100 or less, more preferably 40 or more and 100 or less, still more preferably 50 or more and 100 or less, and particularly preferably 60 or more and 90 or less. preferable.

Measurement of the ratio (A / B) with a goniophotometer First, the incident angle and the light receiving angle will be described. In this embodiment, when measuring with a goniophotometer, the incident angle is set to −45 ° because the measurement sensitivity is high for an image in a wide range of glossiness.
The reason why the light receiving angles are set to −30 ° and + 30 ° is that the measurement sensitivity is highest in evaluating an image having a glitter feeling and an image having no glitter feeling.

Next, a method for measuring the ratio (A / B) will be described.
In this embodiment, when measuring the ratio (A / B), a “solid image” is first formed by the following method. The developer used as a sample is filled in a developing unit of DocuCentre-III C7600 manufactured by Fuji Xerox Co., Ltd., and fixed on a recording paper (OK top coat + paper, manufactured by Oji Paper Co., Ltd.) at a fixing temperature of 190 ° C. A solid image with a toner loading of 4.5 g / cm ² is formed at a pressure of 4.0 kg / cm ² . The “solid image” refers to an image with a printing rate of 100%.
Using a spectroscopic color difference color difference meter GC5000L manufactured by Nippon Denshoku Industries Co., Ltd. as a variable angle photometer, incident light with an incident angle of −45 ° is incident on the solid image. The reflectance A at the light receiving angle + 30 ° and the reflectance B at the light receiving angle −30 ° are measured. Note that the reflectance A and the reflectance B were measured at intervals of 20 nm for light having a wavelength in the range of 400 to 700 nm, and the average value of the reflectance at each wavelength was used. The ratio (A / B) is calculated from these measurement results.

The glitter toner of this embodiment preferably has an average equivalent circle diameter D of the toner that is longer than the average maximum thickness C of the toner.
The equivalent circle diameter M is given by the following equation, where X is the projected area on the flat surface where the projected area is the maximum surface.
M = (X / π) ^1/2
The toner shown in FIG. 1 is a flat toner having a circle-equivalent diameter M longer than the maximum thickness L.
In the glitter toner of this embodiment, the ratio (C / D) of the average maximum thickness C of the toner to the average equivalent circle diameter D of the toner is preferably 0.001 or more and 0.500 or less. It is more preferably 01 or more and 0.500 or less, and further preferably 0.05 or more and 0.100 or less. It is excellent in the brightness of the image obtained as it is the said range.

The average maximum thickness C and the average equivalent circle diameter D are measured by the following methods.
The toner is placed on a smooth surface, and is vibrated and dispersed so that there is no unevenness. 1,000 toners were enlarged 1,000 times with a color laser microscope “VK-9700” (manufactured by Keyence Corporation), and the maximum thickness C and the equivalent circle diameter D of the surface viewed from above were measured. And it calculates by calculating | requiring those arithmetic mean values.
Similarly, the average major axis length and the average minor axis length were increased by 1,000 times with a color laser microscope (VK-9700) (manufactured by Keyence Corporation) for 1,000 toners. The length and the short axis length are measured, and the arithmetic average value thereof is calculated.

In the present embodiment, the average maximum thickness C is preferably 1 to 6 μm, and more preferably 2 to 5 μm.
The average equivalent circle diameter D is preferably 5 to 40 μm, more preferably 8 to 30 μm, and still more preferably 10 to 25 μm.
It is preferable that the average maximum thickness C and the average equivalent circle diameter D are within the above ranges because excellent glitter can be obtained.

Further, in the glitter toner of the present embodiment, when the cross section in the thickness direction of the toner is observed, the angle between the major axis direction of the toner and the major axis direction of the glitter pigment is −30 ° to The number of glitter pigments in the range of + 30 ° is preferably 60% by number or more of all observed glitter pigments.
The toner T shown in FIGS. 1 and 2 is a flat toner having an equivalent circle diameter longer than the thickness L, and contains scale-like pigment particles MP.
As shown in FIG. 2, when the toner T has a flat shape having a circle-equivalent diameter longer than the thickness L, the toner moves to an image carrier, an intermediate transfer member, a recording medium, etc. in the image forming development process and the transfer process. At this time, since the toner tends to move so as to cancel the charge to the maximum, it is considered that the toners are arranged so that the area to be adhered becomes the maximum. In other words, on the recording medium to which the toner is finally transferred, it is considered that the flat toner is arranged so that the flat surface side faces the recording medium surface. Also in the fixing process of image formation, it is considered that the flat toners are arranged so that the flat surface side faces the recording medium surface due to the pressure during fixing. In particular, it is considered that the external addition of the fluororesin particles further facilitates the alignment of the toner so that the adhesion area is maximized as described above.
Therefore, among the scale-like pigment particles contained in the toner, “the angle between the major axis direction in the cross section of the toner and the major axis direction of the pigment particles is in the range of −30 ° to + 30 °. It is considered that the pigment particles satisfying the requirement "" are arranged so that the surface side having the largest area faces the recording medium surface. When the image thus formed is irradiated with light, the ratio of the pigment particles that diffusely reflect the incident light is suppressed, so that the above range (A / B) can be achieved. .

As described above, when the cross section in the thickness direction of the toner is observed, the pigment particles in which the angle between the major axis direction of the toner and the major axis direction of the pigment particles is in the range of −30 ° to + 30 °. Is preferably 60% by number or more of all the observed pigment particles. Furthermore, the number is more preferably 70% by number to 95% by number, and particularly preferably 80% by number to 90% by number.
When the number is 60% by number or more, excellent glitter is easily obtained.

Here, a method for observing the toner cross section will be described.
After embedding the toner with a bisphenol A liquid epoxy resin and a curing agent, a cutting sample is prepared. Next, the cutting sample is cut at −100 ° C. using a cutting machine using a diamond knife (in this embodiment, LEICA ultramicrotome (manufactured by Hitachi High-Technologies Corporation)), and the observation sample is prepared. Make it. The cross section of the toner particles is observed with a transmission electron microscope (TEM) at a magnification of about 5,000 times. For the 1,000 toners observed, the number of pigment particles in which the angle between the major axis direction of the toner cross section and the major axis direction of the pigment particles is in the range of −30 ° to + 30 ° is calculated using image analysis software. And calculate the ratio.

  The “major axis direction in the cross section of the toner” means a direction perpendicular to the thickness direction of the toner having an average equivalent circle diameter D longer than the above average maximum thickness C, and “major axis direction of pigment particles”. "Represents the length direction of the pigment particles.

<Method for producing glitter toner>
The toner of the exemplary embodiment is manufactured by a known method such as a wet method or a dry method, but is preferably manufactured by a wet method. Examples of the wet method include a melt suspension method, an emulsion aggregation method, a dissolution suspension method, and the like, and among these, it is particularly preferable to produce by an emulsion aggregation method.
Here, the emulsion aggregation method is a method of preparing dispersions (emulsion, glitter pigment dispersion, etc.) each containing components (binder resin, colorant, etc.) contained in the toner, and mixing these dispersions. And then agglomerated particles above the melting temperature or glass transition temperature of the binder resin (in the case of producing a toner containing both a crystalline resin and an amorphous resin, In addition, the toner components are aggregated and united by heating to a glass transition temperature or higher) of the amorphous resin.

The method for adding an aromatic hydrocarbon having 9 to 32 carbon atoms to the toner is not particularly limited, but the following methods can be exemplified.
One is a method of adding toner at the same timing as each material (bright pigment, binder resin, release agent, etc.) during toner production. For example, in the emulsion aggregation method described later, the aromatic hydrocarbon having 9 to 32 carbon atoms is easily taken into the toner by adding the aromatic hydrocarbon having 9 to 32 carbon atoms by the time of fusion.
Further, as another method, the glitter pigment is subjected to a hydrophobic treatment, and the hydrophobic pigment subjected to the hydrophobic treatment and an aromatic hydrocarbon having 9 to 32 carbon atoms are directly mixed to form a surface of the glitter pigment. Examples thereof include a method in which an aromatic hydrocarbon having 9 to 32 carbon atoms attached is used as a pigment in the production of a toner.

If the toner is produced by an emulsion aggregation method, it is preferable to prepare the toner by the following production method, for example.
First, glitter pigment particles are prepared, and the glitter pigment particles and the binder resin are dispersed and dissolved in a solvent and mixed. By dispersing this in water by phase inversion emulsification or shear emulsification, glitter pigment particles coated with a resin are formed. Other compositions (for example, a release agent, a shell resin, etc.) are added here, a flocculant is further added, the temperature is raised to near the glass transition temperature (Tg) of the resin while stirring, and the agglomerated particles are dispersed. Form. In this step, for example, by using a stirring blade that forms a laminar flow having two paddles and stirring at a high stirring speed (for example, 500 rpm or more and 1,500 rpm or less), the glitter pigment particles are aggregated particles. Among them, the major axis direction is aligned, and the agglomerated particles also aggregate in the major axis direction, so that the toner thickness becomes smaller (that is, the average equivalent circle diameter D of the toner than the average maximum thickness C of the toner). Long toner can be easily obtained.) Finally, it is made alkaline for particle stabilization, and then the temperature is raised to a temperature equal to or higher than the glass transition temperature (Tg) of the toner, preferably near Tg + 20 ° C., and the aggregated particles are coalesced. In this coalescence process, coalescence is performed at a lower temperature (for example, 60 ° C. or more and 80 ° C. or less), so that the movement associated with the rearrangement of the material is reduced, the orientation of the pigment is maintained, and the toner thickness direction When observing the cross section, the number of glitter pigments in which the angle between the major axis direction of the toner and the major axis direction of the metal pigment is in the range of −30 ° to + 30 ° is the total glitter property observed. A toner having 60% by number or more of pigments can be easily obtained.

  In addition, as said stirring speed, 650 rpm or more and 1,130 rpm or less are preferable, and 760 rpm or more and 870 rpm or less are especially preferable. Further, the coalescence temperature in the coalescence step is preferably 63 ° C. or more and 75 ° C. or less, particularly preferably 65 ° C. or more and 70 ° C. or less.

  There are no particular limitations on the method of externally adding the toner base particles to the surface, and any known method can be used, for example, a mechanical method or a chemical method.

(Electrostatic image developer)
The electrostatic charge image developer of this embodiment (hereinafter sometimes referred to as “developer”) is not particularly limited as long as it contains the glittering toner of this embodiment, and the toner is used alone. A one-component developer or a two-component developer including a toner and a carrier may be used. In the case of a one-component developer, a toner containing magnetic metal particles or a non-magnetic one-component toner containing no magnetic metal particles may be used.

The carrier is not particularly limited as long as it is a known carrier, and iron powder carriers, ferrite carriers, surface-coated ferrite carriers, and the like are used. Each surface-added powder may be used after a desired surface treatment.
Specific examples of the carrier include the following resin-coated carriers. Examples of the carrier core particle include normal iron powder, ferrite, and magnetite molding, and the volume average particle size is preferably 30 to 200 μm.

  Examples of the coating resin for the resin-coated carrier include styrenes such as styrene, parachlorostyrene, and α-methylstyrene; methyl acrylate, ethyl acrylate, n-propyl acrylate, lauryl acrylate, acrylic acid 2 -Α-methylene fatty acid monocarboxylic acids such as ethylhexyl, methyl methacrylate, n-propyl methacrylate, lauryl methacrylate, 2-ethylhexyl methacrylate; nitrogen-containing acrylics such as dimethylaminoethyl methacrylate; acrylonitrile, methacrylonitrile, etc. Vinyl nitriles; vinyl pyridines such as 2-vinyl pyridine and 4-vinyl pyridine; vinyl ethers such as vinyl methyl ether and vinyl isobutyl ether; vinyl methyl ketone, vinyl ethyl ketone, vinyl isopropenyl Homopolymers such as vinyl ketones such as ketones; olefins such as ethylene and propylene; vinyl-based fluorine-containing monomers such as vinylidene fluoride, tetrafluoroethylene and hexafluoroethylene; and copolymers comprising two or more types of monomers Furthermore, silicone resins containing methyl silicone, methyl phenyl silicone, etc., polyesters containing bisphenol, glycol, etc., epoxy resins, polyurethane resins, polyamide resins, cellulose resins, polyether resins, polycarbonate resins and the like can be mentioned. These resins may be used alone or in combination of two or more. The coating amount of the coating resin is preferably in the range of about 0.1 to 10 parts by weight and more preferably in the range of 0.5 to 3.0 parts by weight with respect to 100 parts by weight of the core particles.

  For the production of the carrier, a heating type kneader, a heating type Henschel mixer, a UM mixer, or the like is used. Depending on the amount of the coating resin, a heating type fluidized rolling bed, a heating type kiln, or the like is used.

When a carrier in which ferrite particles are used as a core and coated with a resin in which carbon black or the like as a conductive agent and melamine beads or the like as a charge control agent are dispersed in methyl acrylate or ethyl acrylate and styrene or the like is used as a carrier, Since the resistance controllability is excellent even when the film thickness is increased, the image quality and the image quality maintenance are excellent, which is more preferable.
The mixing ratio of the toner and the carrier in the developer is not particularly limited and is selected according to the purpose.

(Image forming method)
An image forming method using the glitter toner of this embodiment will be described. The glitter toner of the present embodiment is used in an image forming method using a known electrophotographic method. Specifically, it is used in an image forming method having the following steps.
That is, a preferred image forming method includes a latent image forming step for forming an electrostatic latent image on the surface of the image carrier, and development for forming the toner image by developing the electrostatic latent image formed on the surface of the image carrier with toner. And a fixing step for fixing the toner image transferred to the surface of the transfer medium. The electrostatic charge of the present embodiment is used as the toner. Image developing toner is used. Further, the transfer step may use an intermediate transfer member that mediates transfer of the toner image from the image holding member to the transfer target.
Further, it may further include a cleaning step for removing residual toner on the surface of the image carrier after the transfer.

Each of the above steps is a general step per se, and is described in, for example, JP-A-56-40868 and JP-A-49-91231. Note that the image forming method of the present embodiment can be carried out by using a known image forming apparatus such as a copying machine or a facsimile machine.
The electrostatic latent image forming step is a step of forming an electrostatic latent image on an image carrier (photoconductor).
The developing step is a step of developing the electrostatic latent image with a developer layer on a developer holding member to form a toner image. The developer layer is not particularly limited as long as it contains the glitter toner of this embodiment.
The transfer step is a step of transferring the toner image onto a transfer target. Examples of the transfer medium in the transfer process include an intermediate transfer medium and a recording medium such as paper.
In the fixing step, for example, there is a method of forming a copy image by fixing the toner image transferred onto the transfer paper by a heating roller fixing device in which the temperature of the heating roller is set to a constant temperature.
The cleaning step is a step of removing the electrostatic charge image developer remaining on the image carrier.
As the transfer target, a recording medium such as an intermediate transfer member or paper can be used.
Examples of the recording medium include paper used for electrophotographic copying machines and printers, OHP sheets, etc., for example, coated paper whose surface is coated with resin, art paper for printing, and the like. Etc. can be used suitably.

  The image forming method of the present embodiment may further include a recycling step. The recycling step is a step of transferring the electrostatic image developing toner collected in the cleaning step to the developer layer. The image forming method including the recycling process is performed using an image forming apparatus such as a toner recycling system type copying machine or facsimile machine. Further, the present invention may be applied to a recycling system in which the cleaning process is omitted and toner is collected simultaneously with development.

(Image forming device)
The image forming apparatus of the present embodiment is an image forming apparatus using the glitter toner of the present embodiment. The image forming apparatus of this embodiment will be described.
The image forming apparatus according to this embodiment includes an image carrier, a charging unit that charges the image carrier, and an exposure unit that exposes the charged image carrier to form an electrostatic latent image on the surface of the image carrier. Developing means for developing the electrostatic latent image with toner to form a toner image; transfer means for transferring the toner image from the image carrier to the surface of the transfer body; and transferring the toner image to the surface of the transfer body. It is preferable that the toner is a glittering toner according to the exemplary embodiment.
The image forming apparatus according to the present exemplary embodiment is not particularly limited as long as it includes at least the image holding member, the charging unit, the exposure unit, the developing unit, the transfer unit, and the fixing unit as described above. However, other cleaning means, static elimination means, and the like may be included as necessary.
In the transfer unit, the transfer may be performed twice or more using an intermediate transfer member. Examples of the transfer medium in the transfer unit include an intermediate transfer medium and a recording medium such as paper.

The image carrier and each of the above-described units can preferably use the configurations described in the respective steps of the image forming method. As each of the above-described means, a known means in the image forming apparatus can be used. In addition, the image forming apparatus according to the present embodiment may include means and devices other than the above-described configuration. Further, the image forming apparatus according to the present embodiment may simultaneously perform a plurality of the above-described means.
The image forming apparatus according to the present exemplary embodiment preferably includes a cleaning unit that removes the electrostatic charge image developer remaining on the image carrier.
Examples of the cleaning means include a cleaning blade and a cleaning brush, and a cleaning blade is preferable.

In this image forming apparatus, for example, the part including the developing unit may be a cartridge structure (process cartridge) that is detachable from the main body of the image forming apparatus. As the process cartridge, a developer holding body is used. The process cartridge of the present embodiment is preferably used that includes at least the electrostatic charge image developing developer of the present embodiment.
Hereinafter, although an example of the image forming apparatus of this embodiment is shown, it is not necessarily limited to this. The main parts shown in the figure will be described, and the description of the other parts will be omitted.

FIG. 3 is a schematic configuration diagram showing an embodiment of an image forming apparatus including a developing device to which the toner of the present embodiment is applied.
In FIG. 1, the image forming apparatus of the present embodiment has a photosensitive drum 20 as an image holding member that rotates in a predetermined direction, and the photosensitive drum 20 is charged around the photosensitive drum 20. A charging device 21, for example, an exposure device 22 as a latent image forming device for forming an electrostatic latent image Z on the photosensitive drum 20, and a visible image of the electrostatic latent image Z formed on the photosensitive drum 20. Developing device 30, transfer device 24 that transfers a toner image visualized on photosensitive drum 20 onto recording paper 28 that is a transfer target, and cleaning that cleans residual toner on photosensitive drum 20 The devices 25 are sequentially arranged.

In the present embodiment, as shown in FIG. 3, the developing device 30 has a developing housing 31 in which a developer G containing toner 40 is accommodated, and the developing housing 31 is developed to face the photosensitive drum 20. A development roll (development electrode) 33 serving as a toner holder facing the development opening 32 and applying a development bias determined to the development roll 33, A developing electric field is formed in the developing region between the photosensitive drum 20 and the developing roll 33. Further, a charge injection roll (injection electrode) 34 as a charge injection member is provided in the development housing 31 so as to face the development roll 33. In particular, in this embodiment, the charge injection roll 34 also serves as a toner supply roll for supplying the toner 40 to the developing roll 33.
Here, the rotation direction of the charge injection roll 34 may be selected. However, in consideration of the toner supply property and the charge injection characteristic, the charge injection roll 34 has the same direction at the portion facing the developing roll 33. In addition, it is preferable that the rotation is performed with a peripheral speed difference (for example, 1.5 times or more), the toner 40 is sandwiched between regions where the charge injection roll 34 and the development roll 33 are sandwiched, and the charge is injected while being rubbed.

Next, the operation of the image forming apparatus will be described.
When the image forming process is started, first, the surface of the photosensitive drum 20 is charged by the charging device 21, and the exposure device 22 writes the electrostatic latent image Z on the charged photosensitive drum 20, and the developing device 30 then The electrostatic latent image Z is visualized as a toner image. Thereafter, the toner image on the photoconductive drum 20 is conveyed to a transfer site, and the transfer device 24 electrostatically transfers the toner image on the photoconductive drum 20 to a recording paper 28 that is a transfer target. The residual toner on the photosensitive drum 20 is cleaned by the cleaning device 25. Thereafter, the toner image on the recording paper 28 is fixed by a fixing device (not shown) to obtain an image.

  FIG. 4 is a schematic configuration diagram illustrating an example of a process cartridge according to the present embodiment. The process cartridge according to the present embodiment is characterized by including a toner holding body that holds the toner according to the present embodiment and holds and conveys the toner.

A process cartridge 200 shown in FIG. 4 includes a photosensitive roller 107 as an image holding member, a charging roller 108, a developing device 111 that accommodates the toner of the above-described embodiment, a photosensitive member cleaning device 113, and an opening 118 for exposure. , And the opening 117 for static elimination exposure is combined and integrated using a mounting rail 116. The process cartridge 200 is detachable from an image forming apparatus main body including a transfer device 112, a fixing device 115, and other components not shown. It constitutes.
In FIG. 4, reference numeral 300 represents a transfer target.

  The process cartridge 200 shown in FIG. 4 includes a charging device 108, a developing device 111, a cleaning device 113, an opening 118 for exposure, and an opening 117 for static elimination exposure. May be combined. In the process cartridge of the present embodiment, in addition to the developing device 111, the photosensitive member 107, the charging device 108, the cleaning device (cleaning means) 113, the opening 118 for exposure, and the opening 117 for static elimination exposure. At least one selected from the group consisting of:

  Next, the toner cartridge of this embodiment will be described. The toner cartridge according to this embodiment is detachably attached to the image forming apparatus, and at least the toner cartridge that stores toner to be supplied to the developing unit provided in the image forming apparatus. The toner according to the exemplary embodiment. It should be noted that at least the toner may be stored in the toner cartridge of the present embodiment, and for example, a developer may be stored depending on the mechanism of the image forming apparatus.

  The image forming apparatus shown in FIG. 3 is an image forming apparatus having a configuration in which a toner cartridge (not shown) can be freely attached and detached, and the developing device 30 is connected to the toner cartridge by a toner supply pipe (not shown). . Further, when the amount of toner stored in the toner cartridge is low, this toner cartridge may be replaced.

Hereinafter, the present embodiment will be described in more detail with reference to examples and comparative examples, but the present embodiment is not limited to these examples.
In the following examples, “part” means “part by weight” and “%” means “% by weight” unless otherwise specified.

<Measurement Method of Volume Average Particle Diameter of Carrier and Volume Average Particle Diameter of Toner>
The volume average particle diameter of the carrier was measured using an electron microscope (SEM). More specifically, after obtaining an image by SEM, the diameter (longest part) r ₁ of each particle was measured. After measuring it every 100 obtains the volume to sphere diameter in terms of the r ₁ ~r _100, and the value of the volume average particle diameter when it becomes 50% from the first to 100th.
The volume average particle size of the toner was measured using a Coulter Multisizer II (manufactured by Beckman-Coulter). As the electrolytic solution, ISOTON-II (manufactured by Beckman-Coulter) was used.
As a measuring method, first, 0.5 mg to 50 mg of a measurement sample is added to 2 ml of a 5% aqueous solution of a surfactant, preferably sodium alkylbenzenesulfonate as a dispersant, and this is added to 100 ml to 150 ml of the electrolytic solution. Added. The electrolytic solution in which the measurement sample is suspended is subjected to a dispersion treatment with an ultrasonic disperser for about 1 minute. Using the Coulter Multisizer II type, an aperture having an aperture diameter of 100 μm is used, and a particle diameter is 2.0 μm to 60 μm. The particle size distribution of the following range of particles was measured. The number of particles to be measured was 50,000.
For the divided particle size range (channel), draw the cumulative distribution from the small diameter side with respect to the divided particle size range (channel), and define the 50% cumulative particle size as the weight average particle size or volume average particle size, respectively. To do.

<Method for measuring content of aromatic hydrocarbon having 9 to 32 carbon atoms in toner>
Examples include a method in which a toner is dissolved in an appropriate solvent and filtered, and the filtrate is qualitatively quantified with a gas chromatography mass spectrometer, and a mineral spirit liquid is directly pyrolyzed with GCMS and qualitatively quantified with a pyrolyzer. .

<Synthesis of binder resin>
-Bisphenol A ethylene oxide adduct: 216 parts-Ethylene glycol: 38 parts-Tetrabutoxy titanate (catalyst): 0.037 parts Put the above components into a heat-dried two-necked flask and introduce nitrogen gas into the container to inactivate After keeping the atmosphere and raising the temperature while stirring, a copolycondensation reaction was carried out at 160 ° C. for 7 hours, and then the temperature was raised to 220 ° C. while gradually reducing the pressure to 1.3 kPa, and held for 4 hours. Once the pressure was returned to normal pressure, 9 parts of trimellitic anhydride was added, the pressure was gradually reduced to 1.3 kPa again, and maintained at 220 ° C. for 1 hour to synthesize a binder resin. The binder resin had a weight average molecular weight of 40,000 and a glass transition temperature (Tg) of 62 ° C.

<Preparation of resin particle dispersion>
Binder resin: 160 parts Ethyl acetate: 233 parts Sodium hydroxide aqueous solution (0.3N): 0.1 parts

  The above components were put into a separable flask, heated at 70 ° C., and stirred by a three-one motor (manufactured by Shinto Kagaku Co., Ltd.) to prepare a resin mixture. While further stirring this resin mixture, 373 parts of ion-exchanged water was gradually added, phase-inversion emulsified, and solvent removal was performed to obtain a resin particle dispersion (solid content concentration: 30%).

<Preparation of release agent dispersion>
Carnauba wax (Toa Kasei Co., Ltd., RC-160): 50 parts Anionic surfactant (Daiichi Kogyo Seiyaku Co., Ltd., Neogen RK): 1.0 parts Ion-exchanged water: 200 parts The above was mixed and heated to 95 ° C. and dispersed using a homogenizer (Ultra Turrax T50, manufactured by IKA), then dispersed for 360 minutes with a Manton Gorin high-pressure homogenizer (manufactured by Gorin), and volume averaged. A release agent dispersion (solid content concentration: 20%) prepared by dispersing release agent particles having a particle size of 0.23 μm was prepared.

<Preparation of mineral spirit A>
Mineral spirit (manufactured by Maruzen Petrochemical Co., Ltd.): 5 parts ・ 1,2,4-trimethylbenzene (carbon number 9): 15 parts The above was mixed at 25 ° C. for 1 hour to obtain mineral spirit A.

<Preparation of mineral spirit B>
Mineral spirit (manufactured by Maruzen Petrochemical Co., Ltd.): 5 parts n-decylbenzene (carbon number 16): 15 parts The above was mixed at 25 ° C. for 1 hour to obtain mineral spirit B.

<Preparation of glitter pigment particle dispersion 1>
Aluminum pigment (Showa Aluminum Powder Co., Ltd., 2173EA): 100 parts Anionic surfactant (Daiichi Kogyo Seiyaku Co., Ltd., Neogen R): 1.5 parts Ion-exchanged water: 1,080 parts Mineral Spirit A: 20 parts After removing the solvent from the aluminum pigment paste, the above were mixed and dispersed for 1 hour using an emulsifier-dispersing machine Cavitron (CR1010, manufactured by Taiheiyo Kiko Co., Ltd.). A glittering pigment particle dispersion 1 (solid content concentration: 10%) prepared by dispersing (aluminum pigment) was prepared.

<Preparation of glitter pigment particle dispersion 2>
A bright pigment particle dispersion 2 was obtained in the same manner as the preparation of the bright pigment particle dispersion 1, except that the mineral spirit A was not added and 900 parts of ion-exchanged water was used.

<Preparation of glitter pigment particle dispersion 3>
A bright pigment particle dispersion 3 was obtained in the same manner as the preparation of the bright pigment particle dispersion 1 except that the mineral spirit A was changed to the mineral spirit B.

<Preparation of glitter pigment particle dispersion 4>
The preparation of the glitter pigment particle dispersion 1 was carried out except that 100 parts of the aluminum pigment was treated with 5 parts of hydrophobic silica (hexamethyldisilazane treatment) 5 parts in preparation of the glitter pigment particle dispersion 1. A bright pigment particle dispersion 4 was obtained in the same manner as described above.

<Preparation of glitter pigment particle dispersion 5>
A bright pigment particle dispersion 5 was obtained in the same manner as the preparation of the bright pigment particle dispersion 4 except that mineral spirit A was not added and that 900 parts of ion-exchanged water was used.

<Preparation of glitter pigment particle dispersion 6>
A bright pigment particle dispersion 6 was obtained in the same manner as the preparation of the bright pigment particle dispersion 4 except that the mineral spirit A was changed to mineral spirit B.

<Preparation of Toner 1>
-Resin particle dispersion: 183.3 parts-Release agent dispersion: 35 parts-Bright pigment particle dispersion: 1:33 parts-Bright pigment particle dispersion 2: 66 parts-Nonionic surfactant (IGEPAL CA897) 1.40 parts The above raw materials were placed in a cylindrical stainless steel container, and dispersed and mixed for 10 minutes while applying a shearing force at 4,000 rpm with a homogenizer (manufactured by IKA, Ultra Turrax T50). Next, 1.86 parts of a 10% nitric acid aqueous solution of polyaluminum chloride was gradually added dropwise, and the homogenizer was rotated at 5,000 rpm for 15 minutes to be mixed to obtain a raw material dispersion.
Thereafter, the raw material dispersion is transferred to a polymerization kettle equipped with a stirring device using a four-paddle stirring blade and a thermometer, and heated with a mantle heater at a stirring speed of 810 rpm, and agglomerated particles at 56 ° C. Promoted growth. At this time, the pH of the raw material dispersion was controlled in the range of 2.2 to 3.5 with 0.3N nitric acid or 1N sodium hydroxide aqueous solution. The agglomerated particles were formed by maintaining in the above pH range for 2 hours. At this time, the volume average particle diameter of the aggregated particles measured using Multisizer II (aperture diameter: 50 μm, manufactured by Beckman-Coulter) was 14.1 μm.

Next, 91.7 parts of a resin particle dispersion was additionally added, and the resin particles of the binder resin were adhered to the surface of the aggregated particles. The temperature was further raised to 58 ° C., and aggregated particles were prepared while confirming the size and form of the particles with an optical microscope and Multisizer II. Thereafter, the pH was raised to 8.0 in order to fuse the aggregated particles, and then the temperature was raised to 67.5 ° C. After confirming that the aggregated particles were fused with an optical microscope, the pH was lowered to 6.0 while maintaining the temperature at 67.5 ° C., and the heating was stopped after 1 hour, followed by cooling at a rate of temperature decrease of 1.0 ° C./min. Thereafter, the mixture was sieved with a 20 μm mesh, washed repeatedly with water, and then dried with a vacuum dryer to obtain toner particles. The obtained toner particles had a volume average particle diameter of 15.5 μm.
With respect to 100 parts of the obtained toner particles, 1.2 parts of silicone oil-treated silica particles (RY50: manufactured by Nippon Aerosil Co., Ltd.) having an average particle size of 40 nm and hexamethyldisilazane (HMDS) treatment having an average particle size of 150 nm are used. 1.5 parts of silica particles were mixed for 3 minutes at a peripheral speed of 22 m / s using a Henschel mixer. Thereafter, the toner was prepared by sieving with a vibrating sieve having an opening of 45 μm. At this time, the volume average particle diameter of the toner 1 measured using Multisizer II (aperture diameter: 50 μm, manufactured by Beckman Coulter, Inc.) was 15.5 μm.

<Creation of carrier>
Ferrite particles (volume average particle size: 35 μm): 100 parts Toluene: 14 parts Polymethyl methacrylate (weight average molecular weight: 75,000): 1.6 parts Carbon black: 0.12 parts (trade name: VXC-72, manufactured by Cabot Corporation, volume resistivity: 100 Ωcm or less)
Crosslinked melamine resin particles (average particle size: 0.3 μm, toluene insoluble): 0.3 part First, carbon black was diluted with toluene in polymethyl methacrylate and dispersed with a sand mill. Next, the above components other than the ferrite particles were dispersed therein with a stirrer for 10 minutes to prepare a coating layer forming solution. Next, this coating layer forming solution and ferrite particles were put into a vacuum degassing type kneader and stirred at a temperature of 60 ° C. for 30 minutes, and then the pressure was reduced and toluene was distilled off to form a resin coating layer to obtain a carrier. .

<Preparation of Developer 1>
The toner 1:36 parts and the carrier: 414 parts were put in a V blender, stirred for 20 minutes, and then sieved at 212 μm to prepare Developer 1.

<Preparation of Toner 2 and Developer 2>
Toner 2 and developer 2 were prepared in the same manner as in toner 1 except that 60 parts of glitter pigment particle dispersion 1 and 40 parts of glitter pigment particle dispersion 2 were used in toner 1.

<Preparation of Toner 3 and Developer 3>
A toner 3 and a developer 3 were produced in the same manner as in the toner 1 except that 80 parts of the glitter pigment particle dispersion liquid 1 and 20 parts of the glitter pigment particle dispersion liquid 2 were used.

<Preparation of Toner 4 and Developer 4>
A toner 4 and a developer 4 were produced in the same manner as in the toner 1 except that the glossy pigment particle dispersion 1 was changed to 100 parts.

<Preparation of Toner 5 and Developer 5>
A toner 5 and a developer 5 were prepared in the same manner as in the toner 1 except that the bright pigment particle dispersion 1 was 20 parts and the bright pigment particle dispersion 2 was 80 parts.

<Production of Toner 6 to 10 and Developer 6 to 10>
Toners 6 to 10 and developers 6 to 10 were prepared in the same manner as toners 1 to 5, except that the glitter pigment particle dispersion 1 of toners 1 to 5 was changed to the glitter pigment particle dispersion 3.

<Production of Toners 11 to 15 and Developers 11 to 15>
The same method as in the toners 1 to 5 except that the glitter pigment particle dispersion 1 of the toners 1 to 5 is changed to the glitter pigment particle dispersion 4 and the glitter pigment particle dispersion 2 is changed to the glitter pigment particle dispersion 5. Thus, toners 11 to 15 and developers 11 to 15 were produced.

<Production of Toners 16 to 20 and Developers 16 to 20>
The same method as in the toners 11 to 15 except that the glitter pigment particle dispersion 4 of the toners 11 to 15 is changed to the glitter pigment particle dispersion 6 and the glitter pigment particle dispersion 5 is changed to the glitter pigment particle dispersion 6. Thus, toners 16 to 20 and developers 16 to 20 were produced.

<Preparation of Toner 21 and Developer 21>
Toner 1 and developer 21 were prepared in the same manner as toner 1 except that mineral spirit A was changed to an aliphatic hydrocarbon (Undecane manufactured by Tokyo Chemical Industry Co., Ltd.) in preparation of toner 1.

<Preparation of Toner 22 and Developer 22>
Toner 1 and developer 22 were prepared in the same manner as toner 1 except that mineral spirit A was changed to paraffinic hydrocarbon (aliphatic hydrocarbon, HC-PF55E manufactured by Marsan Tech Co., Ltd.) in preparation of toner 1. did.

(Examples 1-12 and Comparative Examples 1-10)
In this embodiment, when measuring the glitter, a “solid image” was first formed by the following method. The developer used as a sample is filled in a developing device of DocuCentre-III C7600 manufactured by Fuji Xerox Co., Ltd., and fixed on a recording paper (OK topcoat + paper, manufactured by Oji Paper Co., Ltd.) at a fixing temperature of 190 ° C. A solid image with a toner loading of 4.5 g / cm ² was formed at a pressure of 4.0 kg / cm ² . The “solid image” refers to an image with a printing rate of 100%.
Evaluation was performed according to the following criteria. Up to C was acceptable.

<Illumination evaluation>
A: No problem can be confirmed in the glitter.
B: There is a slightly irregular impression in radiance.
C: Although the glossiness is slightly low, it is acceptable.
D: The brightness is remarkably low and unacceptable.

<Evaluation of paper bleeding>
〔Evaluation test〕
The mineral spirit exudation test on the paper was carried out by confirming image unevenness. As the paper, using copier recycled paper, the development contrast is adjusted so that the amount of toner on the paper is 0.4 mg / m ^2, and a solid unfixed image with a margin of 5 mm, a width of 100 mm, and a length of 280 mm is obtained. Created. Using a handy gloss meter gloss meter PG-3D (manufactured by Tokyo Denshoku Industries Co., Ltd.), the gloss of an image in which an unfixed image is fixed at a temperature 10 ° C. at which high temperature offset occurs is used. Under the conditions, the maximum gloss (Gmax) on the fixed image and the minimum gloss (Gmin) on the fixed image were measured. The gross difference (ΔG) was determined from Gmax and Gmin as represented by the following formula and evaluated as follows.
ΔG = Gmax−Gmin
A: Good when ΔG is less than 2 B: Good when ΔG is 2 or more and less than 5 C: No practical problem when ΔG is 5 or more and less than 7 D: There is practical problem when ΔG is 7 or more

<Image streak evaluation (detection detectability determination)>
Whether or not aromatic hydrocarbons such as mineral spirits could be detected was evaluated by the presence or absence of image streaking. The evaluation method is as follows.
A printout test of 25,000 sheets of images with a printing rate of 1% on a horizontal line in normal temperature and humidity (temperature 23 ° C / humidity 60% RH) and in a high temperature and humidity environment (temperature 30 ° C / humidity 85% RH) After the completion, an image of halftone (toner applied amount 0.6 mg / cm ² ) was output to LETTER size XEROX 4200 paper (manufactured by XEROX, 75 g / m ² ), and image streak was evaluated.
-Evaluation criteria-
A: No image streaks B: Image streaks from 1 to 3 places C: Image streaks from 4 to 6 places D: 7 or more image streaks or width 0 .Occurred above 7mm

  The content of aromatic hydrocarbons in Table 1 is the content with respect to the entire toner.

  T: toner, MP: glitter pigment, L: toner thickness, 20: photoconductor (image carrier) drum, 21: charging device, 22: exposure device, 24: transfer device, 25: cleaning device, 28: Recording paper, 30: development device, 31: development housing, 32: development opening, 33: development roll, 34: charge injection roll, 40: toner, 107: photoconductor (image carrier), 108: charging roller, 111 : Developing device (developing means), 112: transfer device, 113: photoconductor cleaning device (cleaning means), 115: fixing device (fixing means), 116: mounting rail, 117: opening for static elimination exposure, 118: Opening for exposure, 200: process cartridge, 300: recording paper (transfer object), Z: electrostatic latent image

Claims (6)

Glitter pigments, and
Containing aromatic hydrocarbons having 9 to 32 carbon atoms,
A glittering toner, wherein the content of the aromatic hydrocarbon having 9 to 32 carbon atoms is 0.5 to 1.2% by weight based on the total weight of the toner.   The glitter toner according to claim 1, wherein the glitter pigment is an aluminum pigment.   An electrostatic charge image developer comprising the glitter toner according to claim 1 and a carrier.   A toner cartridge which is detachable from an image forming apparatus and contains the glitter toner according to claim 1. A latent image forming step for forming an electrostatic latent image on the surface of the image carrier;
A developing step of developing the electrostatic latent image formed on the surface of the image carrier with toner to form a toner image;
A transfer step of transferring the toner image onto the surface of the transfer target; and
A fixing step of fixing the toner image transferred to the surface of the transfer target,
An image forming method, wherein the toner is the glitter toner according to claim 1. An image carrier,
Charging means for charging the image carrier;
Exposure means for exposing the charged image carrier to form an electrostatic latent image on the surface of the image carrier;
Developing means for developing the electrostatic latent image with toner to form a toner image;
Transfer means for transferring the toner image from the image carrier to the surface of the transfer target;
Fixing means for fixing the toner image transferred to the surface of the transfer target,
An image forming apparatus, wherein the toner is the glitter toner according to claim 1.