JPH1090996A - Developer carrier and developing device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a developer carrier having stable and proper electric charge even if pictures are repeatedly delivered by developer on the developer carrier and capable of providing high quality images by preventing non- uniformity or unevenness, image density reduction and ghosts. SOLUTION: In a developer carrier used for a developing device, a coating layer is provided in its substrate surface and the coating layer is composed of at least a connecting resin and resin particles 0.3 to 30μm in number average particle diameter and having charging materials stuck of fixed to its surface or in the vicinity of the surface. Preferably, the particle diameter of resin particles treated with the charging materials for its surface is set within a range of 0.3 to 30μm for number average particle diameter. If the particle diameter is smaller than 0.3μ, it is difficult to obtain uniform surface roughness and, conversely if the particle diameter is larger than 30μm; since particles are excessively protruded from the carrier surface, the thickness of the developer layer is made too large and developer charging is not enough or made non-uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developer carrier applied to a developing device for performing development using a developer, such as electrophotography, electrostatic recording, and magnetic recording, and a developing device using the same. About.

[0002]

2. Description of the Related Art Conventionally, many methods have been known as electrophotography. Generally, a photoconductive substance is used to form an electric latent image on a latent image carrier by various means. Then, the latent image is developed with a toner to form a visible image, and the toner image is transferred to a transfer material such as paper as necessary, and then the toner image is fixed on the transfer material by heat, pressure, etc., and copied. Get things.

[0003] In recent years, there have been many types of devices using electrophotography, such as printers and facsimile machines, in addition to conventional copiers. Particularly, in a printer or a facsimile, a developing method using one-component toner is often used because the size of the copying apparatus needs to be reduced. In the one-component developing method, since the carrier particles such as glass beads and iron powder required in the two-component developing method are unnecessary, the developing device itself can be reduced in size and weight. Further, in the two-component developing method, since it is necessary to keep the toner concentration in the developer constant, a device that constantly detects the toner concentration and replenishes a necessary amount of toner is required. It is a cause of becoming heavy. Such a device is not required in the one-component developing system, and this is also preferable in that it can reduce the size and weight of the device.

[0004] In addition, the printer device includes an LED and an LBP.
2. Description of the Related Art Printers have become the mainstream of the market these days, and the direction of technology is to increase the resolution, specifically, to 240 dpi.
Or 300 dpi, but 400 dpi, 600
dpi and even 800 dpi. Accordingly, a higher definition has been required for the developing system. In addition, the functions of the copying machine have been advanced, and the digitalization has been proceeding. This direction is
Because the main method is to form an electrostatic image with a laser,
Again, the direction of high resolution has been advanced, and here, similarly to the printer, a high resolution and high definition developing method has been required. To cope with these problems, JP-A-1-112253 and JP-A-2-284158 propose toners having a small particle diameter.

[0005] As a developer carrier used for the development of the above-mentioned method, for example, a metal, an alloy or a compound thereof is formed into a cylindrical shape, and the surface thereof is adjusted to a predetermined surface roughness by electrolysis, blasting or sanding. Is used. However, in this case, of the developer layer formed on the surface of the developer carrier by the regulating member, the developer existing near the surface of the developer carrier has a very high electric charge, and the developer carrier It is strongly attracted to the mirror power of the surface, so that there is no chance of friction between the developer and the developer carrier, and the developer cannot have a suitable charge. Under such circumstances, sufficient development and transfer are not performed, resulting in an image having a lot of image density unevenness and scattered characters.

In order to prevent the generation of the developer having such an excessive charge and the strong adhesion of the developer to the developer carrier, a conductive substance such as carbon graphite or a solid lubricant is dispersed. A method of forming a resin film on the surface of the developer carrying member has been proposed in Japanese Patent Application Laid-Open No. 1-277265. Further, in order to stabilize the developer transportability in the durable use of the resin film, that is, stabilize the surface roughness of the developer carrying member, a method of including spherical particles in the resin film has been disclosed in JP-A-3-200986. It is proposed in Japanese Patent Publication No. In Japanese Patent Application Laid-Open No. Hei 5-6089, for example, in order to increase the surface roughness of a developer carrying member, a metal cylindrical tube is provided with a resin coating on the surface after forming irregularities by blasting or the like. Proposals have also been made for use as a carrier.

However, in recent years, there has been a demand for a reduction in the energy consumption of the copying machine and the LBP body, and accordingly, in order to reduce the energy required for fixing the toner, studies have been made to lower the temperature of the developer used. ing. Under the influence of the influence, the number of developers that easily fuse to a developer carrier or the like is increasing. Further, there is a demand for further improvement in the durability of the developing cartridge and the unit.

[0008]

Heretofore, for example, a toner cartridge has been manufactured under the concept of light weight, compactness and user friendliness, and because of its small size, the number of durable sheets has been about 2,000 to 3,000. However, in recent years, as the number of prints from a personal computer or the like has increased, the toner capacity of the cartridge has increased, and the necessity of employing a toner replenishing device has arisen. A longer life is desired.

In recent years, in order to improve the image quality, the regulation of the developer has been strengthened, and the developer layer on the developer carrier tends to be thinner. Load is increasing. In response, for example, the technology described in the above-mentioned Japanese Patent Application Laid-Open No. 1-277265 is
This is effective for a conventional low-durability cartridge. However, in general, the surface of the developer carrier is required to have an appropriate surface roughness. However, according to this technique, the surface roughness of the developer carrier is such that surface irregularities are formed by the originally added graphite. In addition, graphite has a flat shape, so that it is necessary to add a large amount of graphite particles in order to increase the surface irregularities.However, graphite is fragile because of its cleavage property, and In addition, since the surface has an irregular shape, the surface resin layer of the developer carrying member is easily shaved and the surface is easily smoothed. In this respect, Japanese Patent Application Laid-Open No. 3-2009
In the technique disclosed in JP-A-86-86, since a preferable surface unevenness is formed by adding a small amount of particles to the surface resin layer of the developer carrying member, progress has been made in maintaining the unevenness. However, the above-mentioned particles mainly function to form surface irregularities, and provide a suitable charge to the toner and a higher charge amount even when the particles are exposed to the surface and come into contact with the toner. is not. Therefore, there are many aspects that are insufficient from the viewpoint of imparting charge to the developer.

Accordingly, it is an object of the present invention to provide an image forming apparatus in which a developer on a developer carrying member has a stable and appropriate charge even in repeated image formation, is uniform and has no unevenness, and has a reduced image density and ghost. It is an object of the present invention to provide a developer carrier that can obtain a high-quality image without generation. It is a further object of the present invention to provide a developer carrying member which improves the charge imparting property of the resin coating layer on the developer carrying member and can obtain a long and stable image. It is another object of the present invention to provide a developing device that can obtain a stable and high-quality image by using a developer carrier having a long and uniform surface state.

[0011]

The above object is achieved by the present invention described below. That is, the present invention relates to a developer carrier used for a developing device, which has a coating layer on the surface of the developer carrier substrate, and the coating layer has at least a binder resin and a number-average particle diameter of 0.1. A developer carrier comprising 3 to 30 μm and formed of resin particles having a charge-imparting substance adhered or fixed on the surface or on the surface and in the vicinity of the surface, and a developing device using the same. .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the developer carrier of the present invention will be described in more detail with reference to embodiments. In the present invention, as the binder resin used for the resin coating layer of the developer carrying member, generally known resins can be used. For example, styrene resin, vinyl resin, polyether sulfone resin, polycarbonate resin, polyphenylene oxide resin, polyamide resin, fluororesin, cellulose resin, thermoplastic resin such as acrylic resin, epoxy resin,
Polyester resin, alkyd resin, phenolic resin,
A heat or light curable resin such as a melamine resin, a polyurethane resin, a urea resin, a silicone resin, and a polyimide resin can be used. Among them, those having excellent release properties such as silicone resin and fluorine resin, or mechanical properties such as polyether sulfone, polycarbonate, polyphenylene oxide, polyamide, phenol, polyester, polyurethane, styrene resin and acrylic resin. Superior ones are more preferred.

In the present invention, as a material which is added to the resin coating layer and imparts conductivity to the resin coating layer, generally known conductive fine powder can be used. For example, copper, nickel,
Powders of metals such as silver and aluminum, or alloys thereof; metal oxide-based conductive agents such as antimony oxide, indium oxide, tin oxide and titanium oxide, amorphous carbon, furnace black, lamp black, thermal black, acetylene black, And carbon-based conductive agents such as channel black. The addition amount of these conductive fine powders varies depending on the development system. For example, when a one-component insulating developer is used in the jumping development method, the volume resistance value of the resin coating layer is 10 ³ Ω.
cm. Among the above, carbon black, especially conductive amorphous carbon, is particularly excellent in electric conductivity, and can provide excellent conductivity with a small amount of addition as compared with other conductive agents. It is preferable because an arbitrary resistance value can be obtained.

The resin particles used in the present invention can be selected from known resins. For example, resin particles obtained by a pulverization method, spherical resin particles obtained by a suspension polymerization method and the like are used. The resin particles are preferred because a suitable surface roughness can be obtained with a smaller addition amount and a more uniform surface shape can be easily obtained. Examples of such spherical resin particles include acrylic resin particles such as polyacrylate and polymethacrylate, polyamide resin particles such as nylon, polyolefin resin particles such as polyethylene and polypropylene, silicone resin particles, and phenolic resin particles. Examples include polyurethane resin particles, styrene resin particles, and benzoguanamine resin particles. The resin particles obtained by the pulverization method may be used after being subjected to a thermal or physical sphering treatment.

In the present invention, on the surface of the resin particles,
Alternatively, examples of the charge-providing substance adhered or fixed to the surface and the vicinity of the surface include the following charge control agents. Examples of the positive charge control agent that can be used in the present invention include nigrosine and a modified product of nigrosine with a fatty acid metal salt; tributylbenzylammonium-1
Quaternary ammonium salts such as -hydroxy-4-naphthosulfonate and tetrabutylammonium tetrafluoroborate; diorganotin oxides such as dibutyltin oxide and dicyclohexyltin oxide; diorganotin borates such as dibutyltin borate and dioctyltin borate alone Alternatively, two or more types can be used in combination. Of these, charge control agents such as nigrosine and quaternary ammonium salts are particularly preferably used. Further, the following general formula (A)

[0016]

Embedded image [Wherein, R ₁ represents H or CH ₃ , and R ₂ and R ₃ represent a substituted or unsubstituted alkyl group (preferably, C = 1 to 4). Or a copolymer with a polymerizable monomer such as styrene, an acrylate or a methacrylate as described above can be used as a positive charge control agent. Used as a powder.

As the negative charge controlling agent that can be used in the present invention, for example, an organometallic complex or a chelate compound is effective, and examples thereof include aluminum acetyl acetate, iron (II) acetyl acetate, and 3,5-diethyl acetate. A metal complex of acetylacetone such as chromium tert-butylsalicylate, a metal complex of salicylic acid or a salt thereof is preferable, and a metal complex of salicylic acid or a salt thereof (including a monoalkyl group-substituted product and a dialkyl group-substituted product) is particularly preferable.

As the charge-imparting substance to be attached or fixed to the surface of the resin particles in the present invention, a substance obtained by subjecting an inorganic fine powder to an aminosilane coupling treatment can be used. Examples of the inorganic fine powder that can be used here include SiO ₂ , SrTiO ₃ , CeO ₂ , and Cr.
O, Al ₂ O ₃ , or oxides such as ZnO, MgO; S
nitrides such as i ₃ N ₄ ; carbides such as SiC; CaS
Sulfates such as O ₄ , BaSO ₄ , and CaCO ₃ , or carbonates can be used. Such inorganic fine powder,
By treating with an aminosilane coupling agent as described below, it can be used as a positive charge-imparting substance.

The aminosilane coupling agent used in the present invention is represented by the following general formula (B): R _m SiY _n ... (B) [where R represents an alkoxy group or a chlorine atom, and Y represents an amino group. Hydrocarbon group, m is an integer of 1-3, n is 3-1
Represents an integer. The aminosilane coupling agent represented by the following formula is particularly preferable for use in the present invention.

H ₂ NC ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ , H ₂ NCH ₂ CH ₂ CH ₂ Si (OC ₂ H ₅ ) ₃ ,

Embedded image

H ₂ NCONHCH ₂ CH ₂ CH ₂ Si (OC _{2
H 5) 3, H 2 NCH} 2 CH 2 NHCH 2 CH 2 CH 2 Si (OCH 3) 3, H 2 NCH 2 CH 2 NHCH 2 NHCH 2 CH 2 CH 2 · Si
(OCH ₃ ) ₃ , H ₅ C ₂ OCOCH ₂ CH ₂ NHCH ₂ CH ₂ CH ₂ .Si (O
CH ₃ ) ₃ , H ₅ C ₂ OCOCH ₂ CH ₂ NHCH ₂ CH ₂ NHCH ₂ CH ₂
.Si (OCH ₃ ) ₃ , H ₅ C ₂ OCOCH ₂ CH ₂ NHCH ₂ CH ₂ NHCH ₂ CH _{2
· NHCH 2 CH 2 NHC H 2} CH 2 · CH 2 · Si (OCH 3) 3, H 3 COCOCH 2 CH 2 NHCH 2 CH 2 NHCH 2 CH 2
CH ₂ .Si (OCH ₃ ) ₃ ,

[0022]

Embedded image (C ₄ H ₉ ) ₂ NCH ₂ CH ₂ CH ₂ .Si (OCH ₃ ) ₃ , (C ₄ H ₉ ) ₂ NCH ₂ CH ₂ CH ₂ .Si (OC ₂ H ₅ ) ₃ May be replaced by a chlorine atom. These silane coupling agents may be used alone or in a mixture of two or more.

As a method of adhering or fixing the charge-imparting substance to the surface of the resin particles, for example, using a mixer such as a Henschel mixer used when adding an external additive or the like to the toner, the particles are fixed by vigorous stirring. In this case, the fixing can be assisted by increasing the ambient temperature. Further, the powder is fixed to the particles by applying a mechanical impact by passing through a low gap using a device having a rotating piece and a fixed piece as disclosed in Japanese Patent Application Laid-Open No. 2-260662. The method is also applicable.

The particle diameter of the resin particles whose surface has been treated with the charge-imparting substance is 0.3 μm as a number average particle diameter.
A range of from 30 to 30 μm is preferred. If the particle size is less than 0.3 μm, it is difficult to obtain uniform surface irregularities. If the surface roughness of the resin coating layer is to be increased, the amount of the resin particles added becomes excessive, and the resin coating layer becomes brittle. It is not preferable because abrasion resistance is extremely reduced. Conversely, the particle size is 30μ
If it is larger than m, the particles protrude too much from the surface of the carrier, so that the thickness of the developer layer becomes too large and the charging of the developer is insufficient or uneven, and when a bias is applied, It is not preferable because a protruding portion may become a point leaking to the latent image carrier.

The average particle size of the resin particles used in the present invention was measured using a Multisizer II manufactured by Coulter Co., Ltd.
An m aperture (50 μm aperture for particles of 3.0 μm or less) was attached. Measurement of conductive particles
The measurement was performed by attaching a liquid module to an LS-130 type particle size distribution analyzer manufactured by Coulter Corporation. The surface roughness of the resin coating layer to which the particles are added as described above is JIS B0601.
0.3 μm in center line average roughness (Ra)
It is preferably in the range of 5.0 to 5.0 μm. Ra is 0.
If the thickness is less than 3 μm, the thickness of the developer layer on the developer carrier is too small, and the amount of developer for developing a solid image on the latent image carrier cannot be supplied sufficiently. Conversely, R
When a is larger than 5.0 μm, the thickness of the developer layer becomes too large, so that the charging of the developer tends to be insufficient or uneven, which is not preferable. The measurement of the surface roughness of the developer carrying member of the present invention was carried out by using a surface roughness meter SE manufactured by Kosaka Laboratory.
Performed using -3300H. The measurement conditions were a cutoff value of 0.8 mm, a specified distance of 2.5 mm, and a feed rate of 0.1 mm / sec. And the average value measured at 12 points was taken as the measured value.

It is also preferable that the resin coating layer of the present invention contains a lubricating fine powder. Examples of such lubricating powders include fluoropolymers such as Teflon and PVDF; fatty acid metal salts such as zinc stearate, magnesium stearate, aluminum stearate and zinc palmitate; molybdenum disulfide, boron nitride, mica , Graphite, graphite fluoride, silver-niobium selenide, calcium chloride-graphite, talc and the like. Among these, graphite is particularly preferably used because it has conductivity as well as lubricity.

As the substrate used for the developer carrier,
A non-magnetic metal or alloy such as aluminum, stainless steel, brass, or the like, formed into a cylindrical shape and polished, ground, or the like is suitably used. These metal cylindrical tubes are molded or processed with high precision in order to improve the uniformity of images. For example, the straightness in the longitudinal direction is preferably 30 μm
Below, more preferably 20 μm or less, and the run-out of the gap between the developing sleeve and the photosensitive drum, for example, the run-out of the gap between the developing sleeve and the photosensitive drum when the sleeve is rotated by abutting against the vertical face via a uniform spacer. Also preferably 30μ
m or less, more preferably 20 μm or less.

As a method for obtaining a resin coating layer on the surface of the developer carrying member of the present invention, for example, a method in which each component is dispersed and mixed in a solvent to form a coating material, and the resultant is coated on the substrate of the developer carrying member. It is possible to get. For dispersing and mixing the components, a known dispersing apparatus using beads such as a sand mill, a paint shaker, a dyno mill, and a pearl mill can be suitably used. In addition, as a coating method, a known method such as a dipping method, a spray method, and a roll coating method can be applied.

The developer-carrying member of the present invention can form a surface having an appropriate surface roughness for obtaining a suitable developer layer thickness, which is a conventional object, as well as a surface of a resin coating layer. Since the charge-imparting substance is firmly attached to, fixed to, or partly buried in the resin particles protruding in the vicinity of the surface, the chargeability of the developer can be improved. In particular, it was possible to prevent image deterioration after development of a large number of sheets as compared with conventional products. This is because even if the resin coating layer surface is gradually scraped and the resin particles are exposed by the development of a large number of sheets, the charge of the developer is not impaired due to the presence of a charge-providing substance on and near the surface of the resin particles, Further, even if toner deterioration occurs due to the development of a large number of sheets, the charge of the developer can be increased by the function of the charge-providing substance. Conventionally,
It is known that a charge control agent or the like is directly mixed into the resin coating layer of the developing sleeve. However, in this method, the charge control agent is almost uniformly dispersed in the coating layer, so that the efficiency of the addition amount is low. Very bad. In other words, the effect of the charge control agent is hard to easily appear with a small amount of addition. On the other hand, according to the present invention, since the surface of the resin coating layer, or the surface of the resin particles protruding in the vicinity of the surface or the surface, or the surface and the vicinity of the surface carry the charge-providing substance, as a result, There is also an advantage that the effect can be obtained with a smaller amount of the charge imparting substance.

Next, a description will be given of a developing device in which the above-mentioned developer carrier of the present invention is incorporated. In FIG. 2, a latent image carrier for carrying an electrostatic latent image formed by a known process, for example, an electrophotographic photosensitive drum 1 is rotated in the direction of arrow B. A developer carrier (hereinafter, referred to as “developing sleeve”) 8 in the developing roller 11 is connected to the hopper 3.
Carries the magnetic toner 4 as a one-component magnetic developer supplied by the developer and rotates in the direction of arrow A, thereby conveying the developing toner 4 to the developing section D where the developing sleeve 8 and the photosensitive drum 1 are opposed to each other. . A magnet 5 is arranged in the developing sleeve 8 to magnetically attract and carry the magnetic toner 4 on the developing sleeve 8. The developing sleeve 8 has a resin coating layer 7 coated on the metal cylinder 6. 9
Is a gap indicating that the developing sleeve and the magnet 5 are in a non-contact state. The magnetic toner 4 obtains a triboelectric charge capable of developing the electrostatic latent image on the photosensitive drum 1 by friction with the resin coating layer 7 on the developing sleeve 8. In order to regulate the layer thickness of the magnetic toner 4 conveyed to the developing section D, the regulating blade 2 made of a ferromagnetic metal is moved from the surface of the developing sleeve 8 by about 1 mm.
The developing sleeve 8 has a gap width of 100 to 300 μm.
From the hopper 3 so as to face.

When the lines of magnetic force from the magnetic pole N 1 of the magnet 5 concentrate on the regulating blade 2, a thin layer of the magnetic toner 4 is formed on the developing sleeve 8. As the regulating blade 2, a non-magnetic blade can be used. The thickness of the thin layer of the magnetic toner 4 formed on the development sleeve 8 is
Is preferably smaller than the minimum gap between the developing sleeve 8 and the photosensitive drum 1. The developer carrying member of the present invention is particularly effective for a developing device of a type that develops an electrostatic latent image with such a thin toner layer, that is, a non-contact type developing device. The developer carrier of the present invention can also be applied to a developing device having a thickness equal to or greater than the minimum gap between the photosensitive drum 1 and the photosensitive drum 1, that is, a contact type developing device.

A power supply 10 applies a developing bias voltage to the developing sleeve 8 to fly the magnetic toner 4 as a one-component magnetic developer carried on the developing sleeve 8. When using a DC voltage as the developing bias voltage,
It is preferable that a voltage having a value between the potential of the image portion of the electrostatic latent image (the region where the toner 4 adheres and is visualized) and the potential of the background portion is applied to the developing sleeve 8. On the other hand, in order to increase the density of the developed image and improve the gradation, an alternating bias voltage may be applied to the developing sleeve 8 to form an oscillating electric field in which the direction is alternately reversed in the developing section D. in this case,
Preferably, an alternating bias voltage on which a DC voltage component having a value between the potential of the image portion and the potential of the background portion is superimposed is applied to the developing sleeve 8. Also, in so-called regular development in which toner is attached to a high potential portion of an electrostatic latent image having a high potential portion and a low potential portion to visualize the toner, a toner charged to a polarity opposite to the polarity of the electrostatic latent image is used. On the other hand, in so-called reversal development in which toner is attached to a low potential portion of an electrostatic latent image to make it visible, toner that is charged to the same polarity as the polarity of the electrostatic latent image is used. The high potential and the low potential are expressed by absolute values. In any case, the magnetic toner 4 is charged by contact with the developing sleeve 8.

FIG. 3 is a structural view showing another embodiment of the developing device of the present invention, and FIG. 4 is a schematic structural diagram showing still another embodiment of the developing device of the present invention. In the developing device shown in FIGS. 3 and 4, as a member for regulating the layer thickness of the polar toner 4 on the developing sleeve 8, a material having rubber elasticity such as urethane rubber or silicon rubber, or a metal such as phosphor bronze or stainless steel is used. Elastic plates 20 and 21 made of an elastic material or the like are used. In FIG. 3, the elastic plate 20 is pressed against the rotation direction of the developing sleeve 8 in the forward direction, and in FIG. The feature is that the developing sleeve 8 is pressed against the rotating direction of the developing sleeve 8 in the opposite direction. Other basic configurations of the developing devices in FIGS. 3 and 4 are the same as those of the developing device shown in FIG. 2, and those having the same reference numerals indicate that they are basically the same members. FIGS. 2 to 4 are merely schematic examples, and it goes without saying that the developer carrier of the present invention can be used in various forms of devices for the shape of the developer container, the presence or absence of a stirring member, the arrangement of magnetic poles, and the like. Of course, it can also be used in a two-component developing apparatus using carrier particles.

Next, a developer (toner) for obtaining a visible image used in the developer carrier or the developing device of the present invention will be described. Toner mainly consists of binder resin, release agent,
It is a fine powder obtained by melt-kneading a charge control agent, a coloring agent, and the like, solidifying and pulverizing, and then classifying the particles to make the particle size distribution uniform. As the binder resin used for the toner, generally known resins can be used. For example, styrene such as styrene, α-methylstyrene, and p-chlorostyrene and a substituted polymer thereof; a styrene-propylene copolymer, a styrene-butyl acrylate copolymer, a styrene-octyl acrylate copolymer, Styrene-dimethylaminoethyl copolymer, styrene-methyl methacrylate copolymer,
Styrene-ethyl methacrylate copolymer, styrene-butyl methacrylate copolymer, styrene-dimethylaminoethyl methacrylate copolymer, styrene-vinyl methyl ether copolymer, styrene-vinyl methyl ketone copolymer, styrene-butadiene Styrene-based copolymers such as copolymers, styrene-isoprene copolymers, styrene-maleic acid copolymers, styrene-maleic acid ester copolymers; polymethyl methacrylate, polybutyl methacrylate, polyvinyl acetate, polyethylene, polypropylene , Polyvinyl butyral, polyacrylic acid resin, rosin, modified rosin, terpene resin, phenol resin, aliphatic or alicyclic hydrocarbon resin, aromatic petroleum resin, paraffin wax, carnauba wax, etc. can be used alone or in combination. .

Further, a pigment can be contained in the toner. For example, carbon black, nigrosine dye, lamp black, Sudan Black SM, First Yellow G, Benzidine Yellow, Pigment Yellow, India First Orange, Irgazine Red, Paranitroaniline Red, Toluidine Red, Carmine FB, Permanent Bordeaux FRR, Pigment
Orange R, Risor Red 2G, Lake Red C, Rhodamine FB, Rhodamine B Lake, Methyl Violet B Lake, Phthalocyanine Blue, Pigment Blue, Brilliant Green B, Phthalocyanine Green, Oil Yellow GG, Pomelo First Yellow CGG, Kaya set Y963, Kaya set Y
G, Pomelo First Orange RR, Oil Scarlet, Orazol Brown B, Pomelo First Scarlet CG, Oil Pink OP and the like can be used.

In order to use the toner as a magnetic toner,
The toner may contain magnetic powder. As such a magnetic powder, a substance which is magnetized when placed in a magnetic field is used.For example, a powder of a ferromagnetic metal such as iron, cobalt, and nickel, or an alloy or a compound such as magnetite, hematite, or ferrite is used. No. The content of the magnetic powder is preferably about 15 to 70% by weight based on the weight of the toner. Various release agents can be used in the toner. Examples of such release agents include polyfluoroethylene, fluororesin, fluorocarbon oil, silicone oil, low-molecular-weight polyethylene, low-molecular-weight polypropylene, and various waxes. Is mentioned. Further, if necessary, a charge control agent for facilitating positive or negative charge may be added.

[0037]

Next, the present invention will be described more specifically with reference to examples. Example 1 [Preparation of paint] Number average particle diameter D crosslinked by a crosslinking agent
1 = 8.54 μm polymethyl methacrylate (PMM
A) The particles were used as resin particles. These PMMA particles were produced by a suspension polymerization method and had a spherical form. 7
The jacket of a 5 liter Henschel mixer was heated with hot water, 150 g of nigrosine was added to 10 kg of PMMA particles, and the mixture was stirred at an ambient temperature of 90 ° C. to fix the nigrosine on the surfaces of the PMMA particles. When the obtained particles were observed with an electron microscope (FE-SEM),
It was confirmed that the particle surface was sufficiently covered with nigrosine. Next, a paint for forming a resin coating layer was prepared at the following compounding ratio. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Conductive carbon black 25 parts by weight Methanol 60 parts by weight 230 parts by weight isopropyl alcohol After diluting a methanol solution of a phenolic resin intermediate with isopropyl alcohol, conductive carbon black was Add and disperse in a sand mill using glass beads. Further, the above PMMA particles are added for dispersion. After the dispersion, the paint was separated from the glass beads from the paint and the viscosity of the paint was measured at room temperature to find that it was 42.5 mPa · s.

[Preparation of Developing Sleeve] The base of the developing sleeve was coated with this paint. Outer diameter 16mmφ,
An aluminum cylindrical tube having a width of 0.21 m was set up and rotated, and the spray gun was applied while being lowered at a constant speed to apply a uniform film thickness (application area 0.01).
m ² ). This was dried and cured at 140 ° C. for 30 minutes in a drying furnace to obtain a sample of the developing sleeve of the present invention. The adhesion weight of the paint after drying was 100 mg. When the surface roughness of the coating layer was measured, it was 1.75 μm on average in terms of Ra.
m. The volume resistance value was 1.14 Ωcm, and the measurement was performed by attaching a four-terminal probe to Lourester AP manufactured by Mitsubishi Yuka.

[Image Output Durability Test] Next, using the obtained developing sleeve, an image output durability test was carried out using a laser jet IV manufactured by Hewlett-Packard (HP).
The developing sleeve was processed and attached to an EP-E cartridge for Laser Jet IV so that it could be attached. Each time 100 g of the following toner is consumed, 100 g of toner is replenished.
An image output durability test was performed on up to 30,000 sheets in total. Endurance test environment: 15 ° C / 10% RH, 23 ° C / 55% RH
And 30 ° C./80% RH. EP-E
FIG. 1 is a schematic view showing the vicinity of the developing sleeve of the cartridge.

[Production of Toner] The following toner was used. Styrene-butyl acrylate-maleic acid-n-butyl half ester copolymer 100 parts by weight Magnetite 85 parts by weight Charge control agent 4 parts by weight Low molecular weight polypropylene 6 parts by weight After mixing these materials using a Henschel mixer, The mixture was kneaded using a shaft-type extruder, then cooled, cooled, ground by a hammer mill, and then ground by a jet mill to obtain a finely ground product. This was classified by an elbow jet classifier, and the weight average particle diameter D4 was 6.28 μm.
And the number% of particles of 4.0 μm or less is 18.3%,
A classified product having a particle size of 0.1 μm or more in which the weight% was 1.0% was obtained. To 100 parts by weight of the classified product, 1.2 parts by weight of hydrophobic colloidal silica was externally added and mixed to obtain a toner.

[Evaluation Method] (1) Change in solid black image density Initially, every time a fixed number of images are printed, and after the endurance test for 30,000 sheets, a point 1 in a page when solid black printing is performed
About 0 places, reflection densitometer RD918 (manufactured by Macbeth)
And the average of 10 points was taken as the image density.

(2) Density Rise In the same manner as in (1), the image density was changed after the initial and 30,000-sheet image endurance tests were completed, paused for three days, and left for three days. The evaluation results are shown by the following indices. A: Sufficient image density was shown from the start, and there was no change in density. : About 10 sheets from the start show a slight rise, but the image density is sufficient. △: There is a slight rise at the start, and the image density is slightly inferior, but there is no problem in practical use. ○: intermediate between △ and △ Δ: image density is at the lower limit of practical level, and density rises slowly. Δ ×: The image density is inferior to the practical level, and the rise of the density is very slow. ×: The image density is considerably low, and is below a practical level at which the density does not rise.

(3) Ghost An image in which a solid white and a solid black portion are adjacent to each other is developed at the leading end of the image (the first rotation of the developing sleeve), and a solid white mark and a solid black mark appearing on the halftone after the second rotation. The density difference was compared mainly visually, and evaluated with reference to image density measurement. The evaluation results are shown below. : No difference in shade was observed. ：: A degree at which a slight difference in shading can be confirmed depending on the viewing angle. △: The density difference can be visually confirmed, but the image density difference is within 0.01. Δ ○: A shading difference at which the edge is not clear can be confirmed, but is practically OK. Δ: Difference in shading is somewhat clear, and the lower limit of the practical level. Δ ×: The density difference can be clearly confirmed and the image density difference can be confirmed. Inferior to practical level. X: The difference in density is considerably large, and the difference in image density with a reflection densitometer is 0.05 or more.

(4) Fading A solid black image and a line image (in which 5 mm is uniformly inserted) are printed, and the difference in image density appearing as a vertical band in the transfer paper traveling direction is mainly judged visually. For comparison, evaluation was made with reference to image density measurement (using a reflection densitometer).
The evaluation results are shown by the following indices. ◎: There is no density difference visually even in a solid black image. : In solid black image, there is no difference in image density,
If you look through it, you will notice a slight difference in shade. △: In a solid black image, the image density difference is slightly visible, but there is almost no image density difference. Δ ○: In a solid black image, a slight difference in image density can be visually confirmed. ○ Intermediate level between △ and △. Δ: Difference in image density exists within 0.05 in a solid black image over the entire surface, but does not matter for a solid black image with a small area.
Within practical level. Δ ×: The vertical band can be clearly confirmed in a part of the solid black image.
Inferior to practical level. × △: About half of a solid black image has a light image density portion in a vertical band shape. ×: Difference in shading can be confirmed even in a line image. Alternatively, there is a vertical band-shaped dark portion in a part of the solid black image.

(5) Fog The reflectivity of a solid white image was measured, and the reflectivity of an unused transfer paper was further measured. [Worst reflectivity of solid white image−the highest value of reflectivity of unused transfer paper] ] Was used as the fog density, and the evaluation results were shown by the following indices. The reflectance was randomly measured ten times using TC-6DS (manufactured by Tokyo Denshoku). ◎: less than 1.0 ：: 1.0 or more and less than 1.5 △: 1.5 or more and less than 2.3 Δ ○: 2.3 or more and less than 3.0 △: 3.0 or more and less than 4.0 (4 .Times .: 4.0 or more and less than 5.0.times .: 5.0 or more. When the above numerical values were judged by visual inspection, they were hardly visually recognized at 1.5 or less, and 2-3. The degree is a level that can be confirmed by observing carefully, and fogging can be confirmed at a glance when it exceeds 4.0.

(6) Unevenness Various images such as a solid black image, a halftone image, a line image and the like are formed, and the developer on the developing sleeve such as a wavy unevenness or a blotch-like unevenness on the developing sleeve. Image unevenness (waves, blotches, etc.) due to poor coating was confirmed and evaluated. The evaluation results are shown by the following indices. ◎: No unevenness appears at all. : Unevenness can be confirmed when about one out of several to ten and several images are seen through. Δ: Wavy or spot-like unevenness is observed in the first rotation of the first developing sleeve of a halftone image or a solid black image. No problem with photographic images. Δ ×: About one out of one to several solid black images appear. Not practical. X: Unevenness also appears on the solid white image.

(7) Sleeve Contamination After a 30,000-sheet image endurance test or when the image density is extremely reduced, the toner on the surface of the developing sleeve is removed with a vacuum cleaner and an air blow (by an air gun) and observed with an SEM. Then, sleeve contamination was evaluated. The evaluation results are shown by the following indices. A: No toner is present. ：: Fine toner powder is slightly observed in the depression on the surface of the developing sleeve. △: Toner particles remain in various places on the developing sleeve, and the original shape of the toner particles remains. ○: intermediate level between △ and △. Δ: Toner particles adhering to the developing sleeve are present in some places, and the toner particles are crushed as if slightly melted. C: toner fixation is observed in about 20% of the surface of the developing sleeve. Intermediate level between △ and × △. X: Adhesion of the toner is visually observed. There is no streak-like fusion, but when viewed by SEM, toner particles which have been melt-smoothed are present in a considerable portion on the developing sleeve. X: Melted and smoothed toner particles are fixed to a considerable portion of the developing sleeve, and streak-like fusion is partially visually confirmed on the entire circumference of the developing sleeve.

[Evaluation Results] Changes in the solid black image density are shown in graphs 1 and 2 of the accompanying drawings. Sufficient image density was maintained even after the 30,000-sheet image output durability test. Other evaluation results are summarized in Tables 1 and 2 below. No problem occurred with ghosts and fog. Also, there was no exposure of the surface of the aluminum cylindrical tube under the resin coating layer.
When the surface roughness of this developing sleeve after a durability test was measured in an environment of 23 ° C./55% RH, Ra = 1.53 μm.
m and did not change much before and after the durability test.

Example 2 [Preparation of paint] Using PMMA particles to which nigrosine used in Example 1 was fixed, a paint for forming a resin coating layer was prepared at the following compounding ratio. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were used in the same manner as in Example 1. The mixture was dispersed by a sand mill to obtain a paint having a viscosity of 55.0 mPa · s at room temperature.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained in the same manner as in Example 1 using this paint.
Was coated so that the adhesion weight became 95 mg. At this time, the surface roughness of the developing sleeve was Ra = 1.93 μm on average, and O was added to another cylindrical tube.
The HP sheet was wound, coated in the same manner, and the volume resistivity of the film on the OHP sheet was measured. The volume resistivity was 0.95 Ωcm.

[Image Endurance Test] The same image endurance test was performed using the same toner as that used in Example 1.
As a result, a good image with a solid black image density was obtained throughout the durability test (Graph 3 and Graph 4). Tables 1 and 2 summarize other evaluation results.

Example 3 [Preparation of paint] The number average particle diameter D1 of Example 1 was 8.54.
Using 75 μm PMMA particles, a jacket of a 75 liter Henschel mixer was heated with hot water, 150 g of copy blue was added to 10 kg of PMMA particles, and 90
Stir at ambient temperature of ℃ and copy blue to PMMA
The particles were fixed on the surface of the particles. Next, a paint for forming a resin coating layer was prepared at the following compounding ratio. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were used in the same manner as in Example 1. The mixture was dispersed by a sand mill to obtain a paint having a viscosity of 55.0 mPa · s at room temperature.

[Preparation of Developing Sleeve] Using this coating material, in the same manner as in Example 1, an outer diameter of 16 mmφ and a width of 0.21 m
Was coated so that the adhesion weight became 95 mg. At this time, the surface roughness of the developing sleeve is Ra =
The volume resistivity of the OHP sheet was 0.66 Ωcm.

[Image Endurance Test] An image endurance test was performed in the same manner as in Example 1, except that the same toner as used in Example 1 was used. The results were good as shown in Table 1, Table 2, Graph 5 and Graph 6.

Example 4 [Preparation of paint] The number average particle diameter D1 of Example 1 was 8.5.
Using PMMA particles of 4 μm, aminosilane (H ₂ NC
BET treated with _{H 2 CH 2 CH 2 Si (} OCH 3) 3)
G of dry silica having a specific surface area of 130 m ² / g
Was used by fixing it to the surface of PMMA particles in the same manner as in Example 1. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight The above-mentioned PMMA particles 12 parts by weight Conductive carbon black 25 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were dispersed in a sand mill in the same manner as in Example 1.
A paint having a viscosity of 55.0 mPa · s at room temperature was obtained.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained in the same manner as in Example 1 using this paint.
Was applied to an aluminum cylindrical tube having a weight of 95 mg.
The surface roughness of the coating layer was Ra = 1.81 μm.
The volume resistance value of the HP sheet was 0.78 Ωcm.

[Image Output Durability Test] Using the toner of Example 1, an image output durability test was performed in the same manner. At this time, a good image was obtained for the solid black image density during the durability test throughout the durability test (Graphs 7 and 8). Ghost and image density transition were as good as in Example 1. The change in the surface roughness of the coating layer was also small. Table 1 shows other evaluation results.
And Table 2.

Example 5 [Preparation of paint] The aminosilane (H ₂ N) used in Example 4 was used.
PMMA particles having fumed silica treated with CH ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ ) fixed to the surface were used. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Crystalline graphite having an average particle size of 2 μm 50 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were dispersed in a sand mill in the same manner as in Example 1.
A paint having a viscosity of 55.0 mPa · s at room temperature was obtained.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained in the same manner as in Example 1 using this paint.
Was applied to an aluminum cylindrical tube having a weight of 95 mg.
The surface roughness of the coating layer is Ra = 2.12 μm.
The volume resistance value of the HP sheet was 0.99 Ωcm.

[Image Endurance Test] Using the toner of Example 1, an image endurance test was conducted in the same manner. The results were good as shown in Graphs 7, 8 and Tables 1 and 2.

Example 6 [Preparation of paint] The number average particle diameter D1 of Example 1 was 8.5.
Using PMMA particles of 4 μm, aminosilane (H ₂ NC
BET treated with _{H 2 CH 2 CH 2 Si (} OCH 3) 3)
Dry silica having a specific surface area of 130 m ² / g
g and fixed to the surface of PMMA particles in the same manner as in Example 1. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were used in the same manner as in Example 1. Dispersed in a sand mill.
A paint having a viscosity of 55.0 mPa · s at room temperature was obtained.

[Preparation of Developing Sleeve] Using this paint, as in Example 1, an outer diameter of 16 mmφ and a width of 0.21 m
Was applied to an aluminum cylindrical tube having a weight of 95 mg.
The surface roughness of the coating layer was Ra = 1.80 μm.
The volume resistance value of the HP sheet was 0.73 Ωcm.

[Image Endurance Test] Using the toner of Example 1, an image endurance test was performed in the same manner. The change in solid black image density during the durability test at this time is shown in graphs 9 and 10.
As shown in the figure, good images were obtained through the durability test. Other evaluation results are summarized in Tables 1 and 2.

Comparative Example 1 [Preparation of paint] A paint was prepared in the same manner as in Example 1 except that PMMA particles which had not been treated with fumed silica were used. Paint viscosity is 5
2.5 mPa · s, which was almost the same as Example 1.

[Preparation of Developing Sleeve] Using this coating material, an outer diameter of 16 mm was obtained in the same manner as in Example 1 (Example 5).
φ, weight attached to aluminum cylinder with width of 0.21m 95
mg. The surface roughness of the coating layer after curing of the binder was Ra = 1.83 μm, and the volume resistivity was 0.76.
cm and almost the same value as in Example 5.

[Image Endurance Test] An image endurance test similar to that in Example 1 was performed. As a result, an image of almost the same level as in Example 5 was obtained in the first half of the endurance test. The density level began to decrease around 5,000 sheets, and the level of the sleeve ghost also began to decrease. When the surface of the developing sleeve was observed, it was found that the surface roughness was slightly reduced due to the shaving, and the exposed area of the added particles was increased. Other results are shown in Graphs 31, 32, Tables 1 and 2.

Comparative Example 2 [Preparation of Paint] A developing sleeve having surface irregularities formed using graphite having a large particle diameter without adding resin particles. Paints were prepared using the materials shown below. 100 parts by weight of phenol resin intermediate 80 parts by weight of crystalline graphite having an average particle size of 15.2 μm 5 parts by weight of conductive carbon black 60 parts by weight of methanol 410 parts by weight of isopropyl alcohol Was 47.5 mPa · s. Since graphite has a plate-like or scale-like shape, it has been necessary to increase the particle size and increase the amount of addition in order to obtain appropriate surface roughness.

[Production of Developing Sleeve] Using this coating material, a cylindrical tube having an outer diameter of 16 mmφ and a width of 0.21 m was applied in the same manner as in Example 2. The surface roughness of the coating layer is Ra =
1.78 μm and the volume resistance value was 0.58 Ωcm.

[Image Output Durability Test] Using this sample, an image output durability test was performed in the same manner as in Example 1. In the initial stage, almost good images were obtained, but a phenomenon was observed in which the image density gradually decreased after about 10,000 sheets in each environment (Graph 33 and Graph 34). In a low-temperature and low-humidity environment, wavy toner coat unevenness is observed in the latter half of the durability test.
An uneven image was seen on the halftone. The surface roughness of the developing sleeve after the endurance test was measured.
a = 1.10, 1.03, 0.97 μm and the roughness was reduced. Analysis of the composition of the surface (by the laser Raman method) revealed that the amount of graphite was lower than in the initial stage. It is considered that the graphite portion was preferentially shaved by the durability test, and the surface roughness was reduced. Other results are shown in Tables 1 and 2.

Example 7 [Preparation of paint] In place of the particles used in Example 6, spherical PMMA particles cross-linked by a cross-linking agent having an average particle diameter D1 of 12.32 μm were used, and aminosilane (H ₂ NCH ₂ C
H ₂ CH ₂ Si (OCH ₃ ) ₃ ) treated with dry silica having a specific surface area of 130 m ² / g by BET added in an amount of 150
g in the same manner as in Example 6 to obtain crosslinked PMMA particles having dry silica fixed to the surface. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were used in the same manner as in Example 1. Dispersed in a sand mill.
A paint having a viscosity of 50.0 mPa · s at room temperature was obtained.

[Production of Developing Sleeve] Using this, the same coating as in Example 1 was performed. The attached weight was 95 mg, the surface roughness of the coating layer was Ra = 1.98 μm on average, and the volume resistivity was 0.92 Ωcm.

[Image Endurance Test] An image endurance test similar to that of Example 1 was performed on the sleeve. The results were good as shown in graphs 11, 12, and 1 and 2.

Example 8 [Preparation of paint] In place of the particles used in Example 6, PMMA particles having a number average particle diameter D1 = 23.21 μm and having passed through a 400 mesh sieve were used. A crosslinked PMM having the treated silica fixed to its surface in substantially the same manner as in Example 6 except that the amount of the treated silica was 100 g.
A particles were obtained. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 6 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were used in the same manner as in Example 1. The mixture was dispersed by a sand mill to obtain a paint having a viscosity of 45.0 mPa · s at room temperature.

[Preparation of Developing Sleeve] Using this, the same coating as in Example 1 was performed. The attached weight was 135 mg, the surface roughness of the coating layer was Ra = 2.26 μm, and the volume resistivity was 0.86 Ωcm.

[Image Endurance Test] An image endurance test similar to that of Example 1 was performed on the sleeve. The results were good as shown in the graphs 13 and 14, Tables 1 and 2.

Example 9 [Preparation of paint] Instead of the particles used in Example 6, PMMA particles having a number average particle diameter D1 = 5.95 μm were used, and the amount of silica added in Example 5 was changed to 220 g. Represents aminosilane (H ₂ NCH ₂ CH ₂ C
Crosslinked PMMA particles having dry silica treated with H ₂ Si (OCH ₃ ) ₃ ) fixed to the surface were obtained. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 15 parts by weight Crystalline graphite having an average particle size of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were used in the same manner as in Example 1. It was dispersed by a sand mill to obtain a coating material having a viscosity of 52.5 mPa · s at room temperature. This was applied in the same manner as in Example 1. Adhesion weight is 85mg,
The surface roughness of the coating layer is Ra = 1.99 μm on average,
The volume resistance was 1.03 Ωcm.

[Image Endurance Test] An image endurance test similar to that of Example 1 was performed on the sleeve. Table 3 shows the results
And as shown in Table 4.

Comparative Example 3 [Preparation of paint] The treated silica used in Example 6 and PMMA particles were mixed with 20 parts by weight of PMMA particles having a particle size of 0.2 μm instead of PMMA particles having a particle size of 8.54 μm. And
The Henschel mixer was further heated to continue mixing. After heating and mixing, the particles were observed with an electron microscope.
The MMA particles existed in an aggregated state, and the surface treatment was not successfully performed. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 20 parts by weight Crystalline graphite having an average particle size of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight Sand milling the above raw materials using glass beads Was dispersed. After diluting the methanol solution of the phenol resin intermediate with isopropyl alcohol, graphite and carbon are added and dispersed with a sand mill. Further, the above PMMA particles are added for dispersion. After the dispersion was completed, the dispersion was separated from the glass beads.

[Preparation of Developing Sleeve] Using this coating material, a coating weight of 95 mg was applied to an aluminum cylindrical tube having an outer diameter of 16 mmφ and a width of 0.21 m in the same manner as in Example 5. The volume resistivity after curing is 1.21 Ωcm, and the surface roughness Ra of the coating layer is Ra.
= 0.54 μm.

[Image Output Durability Test] This sample was assembled in an EP-E cartridge in the same manner as in Example 5, and
An image endurance test similar to that described above was performed. As for the solid black image density at the endurance test, only a low image density was generally obtained (Graph 35 and Graph 36). In addition, density unevenness occurred in a low-temperature and low-humidity environment. Other results are shown in Tables 3 and 4.

Comparative Example 4 [Production of Developing Sleeve] Outer diameter 16 mmφ, width 0.21 m
Was subjected to sandblasting to roughen the surface so that the surface roughness Ra became 1.63 μm.

[Image Output Durability Test] Using this developing sleeve, the same image output durability test as in Example 6 was performed. In each environment, the image density decreased (Graph 37 and Graph 38), and particularly, the sleeve ghost under low temperature and low humidity and high temperature and high humidity was poor. Other results are shown in Tables 3 and 4.

Example 10 [Preparation of paint] Instead of the particles used in Example 1, nylon particles having a number average particle diameter D = 3.2 μm were used. Nigrosine (250 g) was added to 10 kg of nylon particles, and fixed on the surface in the same manner as in Example 1. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts Nylon particles 30 parts Crystalline graphite having an average particle size of 2 μm 20 parts Conductive carbon black 5 parts Methanol 50 parts Isopropyl alcohol 250 parts The viscosity of the paint was measured at room temperature to give 65.5 mPa · s.
s.

[Preparation of Developing Sleeve] Using this coating material, coating was performed in the same manner as in Example 1. Volume resistance value is 1.16
Ωcm, and the surface roughness Ra of the coating layer was 1.38 μm.

[Image Output Durability Test] An image output durability test was performed using the same toner as in Example 1. Graph 15 and graph 16 show changes in the solid black image during the durability test. The surface roughness after the end of the durability test was 1.28 μm. Other results are shown in Tables 3 and 4.

Example 11 [Preparation of coating material] Aminosilane ((C ₄ H ₉ ) _{2 was} prepared using spherical nylon resin particles having a number average particle diameter D1 = 8.35 μm.
The surface of nylon particles was treated in the same manner as in Example 1 by using 200 g of silica having a specific surface area of 130 m ² / g by BET treated with NCH ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ ) per 10 kg of nylon particles. Was fixed. FE
When confirmed by -SEM, the particle surface was sufficiently covered with silica. Next, paints were prepared according to the following compounding ratios. Phenol resin intermediate 100 parts by weight The above-mentioned nylon particles 14 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Methanol 60 parts by weight Isopropyl alcohol 230 parts by weight The above raw materials are dispersed by a sand mill, and the viscosity is 52.5 at room temperature.
A paint of mPa · s was obtained.

[Preparation of Developing Sleeve] The same coating as in Example 1 was performed using this paint. The attached weight is 95mg,
The surface roughness of the coating layer was Ra = 2.18 µm, and the volume resistivity was 15.2 Ωcm.

[Image Output Durability Test] An image output durability test similar to that of Example 1 was performed on the above sleeve. The results were good as shown in the graphs 17, 18 and Tables 3 and 4.

Example 12 [Preparation of paint] Using amino nylon ((C ₄ H ₉ ) ₂ ) using spherical nylon resin particles having a number average particle diameter D1 = 6.74 μm.
Nylon particles were produced in the same manner as in Example 1 by using 300 g of titanium oxide having a specific surface area of 100 m ² / g by BET treated with NCH ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ ) per 10 kg of nylon particles. Affixed to the surface. When confirmed by FE-SEM, the particle surface was sufficiently covered with titanium oxide. Next, paints were prepared according to the following compounding ratios. Phenol resin intermediate 100 parts by weight Nylon particles 14 parts by weight Molybdenum disulfide with an average particle size of 1.5 μm 20 parts by weight Conductive carbon black 15 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials are dispersed by a sand mill. And a viscosity of 37.5 at room temperature.
A paint of mPa · s was obtained.

[Preparation of Developing Sleeve] The same coating as in Example 1 was performed using this paint. 90m attached weight
g, the surface roughness of the coating layer was Ra = 1.85 μm, and the volume resistivity was 3.23 Ωcm.

[Image Output Durability Test] An image output durability test similar to that of Example 1 was performed on the sleeve. The results were good as shown in Graphs 19 and 20, Tables 3 and 4.

Comparative Example 5 [Preparation of paint] A paint was prepared in the same manner as in Example 11, except that the nylon resin particles were used without any treatment. The viscosity of the paint at room temperature is 5
It was 0.0 mPa · s.

[Preparation of Developing Sleeve] The same coating as in Example 1 was performed using this paint. 93m attached weight
g, the surface roughness of the coating layer was Ra = 2.15 μm, and the volume resistivity was 16.1 Ωcm.

[Image Endurance Test] An image endurance test similar to that of Example 1 was performed on the sleeve. The evaluation results are shown in Graphs 39 and 40, Tables 3 and 4. At the initial stage, good images were obtained as in Example 11. However, under a normal temperature, normal humidity and high temperature and high humidity environment, the density was reduced from 15,000 sheets, and the image density was further lowered after the pause, and the phenomenon that the rise of the density was slow occurred. In a low-temperature and low-humidity environment, the ghost deteriorated as the durability test progressed.

Example 13 [Preparation of paint] The styrene resin cross-linked by the cross-linking agent was pulverized by a jet mill and further classified by an elbow jet classifier to obtain a number average particle diameter D1 = 10.5.
μm, the number% of particles of 6.35 μm or less is 32%, 25%
Resin particles were obtained in which the number% of particles having a particle size of μm or more was 0%. Aminosilane ((C ₄ H ₉ ) ₂ NCH ₂ CH ₂ was added to 10 kg of these particles.
A device having a BET specific surface area of 130 m ² / g, treated with CH ₂ Si (OCH ₃ ) ₃ ), and externally mixed with 200 g of alumina fine powder. The particles are further mixed with a rotating blade and a fixed liner. The alumina fine powder was immobilized on the surface of the styrene particles by setting the clearance between the blade and the liner to 2 mm and passing the blade several times by a circulation mechanism while rotating the blade. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight Styrene particles 9 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 230 parts by weight The above raw materials were used in the same manner as in Example 1. The mixture was dispersed by a sand mill to obtain a coating material having a viscosity of 47.5 mPa · s at room temperature.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained using this paint in the same manner as in Example 1.
Was coated on an aluminum cylindrical tube. 2 at 130 ° C after coating
After drying and curing for 0 minutes, a developing sleeve having an attached weight of 90 mg and a surface roughness Ra of the coating layer of 2.21 μm was obtained. The OH
The measurement of the volume resistance value using a P sheet was 0.77 Ωcm.

[Image Endurance Test] Using the toner of Example 1, an image endurance test of 30,000 sheets was performed in the same manner as in Example 1. The results were good as shown in Graphs 21, 22 and Tables 3 and 4.

Example 14 [Preparation of paint] Instead of the particles used in Example 13, styrene resin particles having a number average particle diameter D1 = 20.3 μm were used. 140 g of nigrosine used in Example 1 was added to 10 kg of styrene resin particles, and fixed on the surface in the same manner as in Example 13. Next, paints were prepared at the following compounding ratios. 100 parts by weight of a phenol resin intermediate 7 parts by weight of the above styrene particles 7 parts by weight 15 parts by weight of crystalline graphite having an average particle size of 2 μm 4 parts by weight of conductive carbon black 60 parts by weight of methanol 230 parts by weight of isopropyl alcohol Measured 52.5
mPa · s.

[Production of Developing Sleeve] Using this coating material, an aluminum cylindrical tube having an outer diameter of 16 mmφ and a width of 0.21 m was coated in the same manner as in Example 1. 90mg attached weight,
The surface roughness Ra of the coating layer was 1.85 μm, and the volume resistance value was 8.10 Ωcm.

[Image Endurance Test] In this evaluation, the same toner as in Example 1 was used. A durability test was performed in the same manner as in Example 1 using the above toner. The surface roughness after the end of the durability test was 1.52 μm. The results are shown in Tables 3 and 4.

Comparative Example 6 [Preparation of Developing Sleeve] A coating was prepared in the same manner as in Example 13 except that styrene particles were used as they were, and this was applied to prepare a developing sleeve.
The attached weight is 90 mg, and the surface roughness of the coating layer is Ra = 2.2.
5 μm, and the volume resistance was 0.79 Ωcm.

[Image Output Durability Test] Using the toner of Example 1, the same image output durability test as in Example 1 was performed. It was good up to around 15,000 sheets of durable images, but thereafter fading occurred and the image density was reduced (graphs 41 and 42). It is considered that the exposure of the styrene particles was large and the charge-imparting property to the toner was lowered. The decrease in the surface roughness of the coating layer was also slightly large (Tables 3 and 4).

Example 15 [Preparation of paint] A particle surface was prepared in the same manner as in Example 6, except that fine silica powder having a specific surface area of 130 m ² / g by BET was used instead of dry silica. Was fixed to alumina. Next, paints were prepared at the following compounding ratios. Methyl methacrylate homopolymer 100 parts by weight PMMA particles 12 parts by weight Crystalline graphite having an average particle size of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Toluene 440 parts by weight The methyl methacrylate homopolymer is previously dissolved in toluene. Graphite and carbon were added thereto and dispersed by a sand mill. Further, the above-mentioned PMMA particles were added and the dispersion was continued. The viscosity of the paint after dispersion was 32.5 mPa · s at room temperature.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained using this paint in the same manner as in Example 1.
Was coated on an aluminum cylindrical tube. After drying at 150 ° C. for 20 minutes, the surface roughness Ra =
A 1.84 μm developing sleeve was obtained. The measurement of the volume resistance value using the OHP sheet was 0.65 Ωcm.

[Image Output Durability Test] Using the toner of Example 1, the same image output durability test as in Example 1 was performed. The results were good as shown in Tables 5 and 6.

Example 16 [Preparation of paint] The aminosilane (H ₂ NCH ₂ C) of Example 6
PMMA particles to which fumed silica treated with H ₂ CH ₂ Si (OCH ₃ ) ₃ ) were fixed were used. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Boron nitride having an average particle size of 2.5 μm 15 parts by weight Conductive carbon black 20 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were the same as in Example 1. Was dispersed with a sand mill.
A paint having a viscosity of 55.0 mPa · s at room temperature was obtained.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained in the same manner as in Example 1 using this paint.
Was applied to an aluminum cylindrical tube having a weight of 95 mg.
The surface roughness of the coating layer was Ra = 1.54 μm,
The volume resistance value of the HP sheet was 2.34 Ωcm.

[Image Output Durability Test] Using the toner of Example 1, an image output durability test was performed in the same manner as in Example 1. The results are shown in Tables 5 and 6. Good images were obtained through the durability test.

Example 17 [Preparation of paint] The number average particle diameter D1 of Example 1 was 8.5.
Using PMMA particles of 4 μm, aminosilane ((C ₄ H ₉ )
B treated with ₂ NCH ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ )
Dry silica 15 having a specific surface area of 130 m ² / g by ET
0 g was fixed to the surface of PMMA particles in the same manner as in Example 6 and used. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 12 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight The above raw materials were used in the same manner as in Example 1. Dispersed in a sand mill.
A paint having a viscosity of 55.0 mPa · s at room temperature was obtained.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained in the same manner as in Example 1 using this paint.
Was applied to an aluminum cylindrical tube having a weight of 95 mg.
The surface roughness of the coating layer was Ra = 1.83 μm.
The volume resistance value of the HP sheet was 0.96 Ωcm.

[Image Endurance Test] Using the toner of Example 1, an image endurance test was performed in the same manner. The evaluation results are summarized in Tables 5 and 6. Good images were obtained through the durability test.

Example 18 [Preparation of paint] Phenol particles having a number average particle diameter D1 = 25 μm were used. Nigrosine (110 g) was added to phenol particles (10 kg), and fixed to the particle surfaces in the same manner as in Example 13. Paints were prepared at the following compounding ratios. 100 parts by weight of a phenol resin intermediate 5 parts by weight of the above phenol 20 parts by weight of molybdenum disulfide having an average particle size of 1.5 μm 15 parts by weight of conductive carbon black 60 parts by weight of methanol 240 parts by weight of isopropyl alcohol When the viscosity was measured, it was 50.5.
mPa · s.

[Preparation of Developing Sleeve] An aluminum cylindrical tube having an outer diameter of 16 mmφ and a width of 0.21 m was coated in the same manner as in Example 1 using this coating material. The attached weight is 52 mg,
The surface roughness Ra of the coating layer was 1.88 μm, and the volume resistance value was 8.30 Ωcm.

[Image Endurance Test] An image endurance test was performed in the same manner as in Example 1 using the above toner. In this evaluation, the same toner as in Example 1 was used. The results are shown in Tables 5 and 6. The surface roughness after the endurance test is 1.4
It was 5 μm.

Example 19 [Preparation of paint] Spherical ethyl acrylate particles cross-linked by a cross-linking agent having a number average particle size of 7 μm were used. For 10 kg of ethyl acrylate particles, aminosilane (H ₂
B treated with NCH ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ )
Dry silica 20 having a specific surface area of 200 m ² / g by ET
After adding 0 g, the mixture was stirred at room temperature for 10 minutes using a Henschel mixer. Next, paints were prepared according to the following compounding ratios. Homopolymer of methyl methacrylate 100 parts by weight Ethyl acrylate particles 13 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Carbon black 5 parts by weight Toluene 350 parts by weight The above copolymer is previously dissolved in toluene. Graphite and carbon were added thereto and dispersed by a sand mill. Further, the above-mentioned ethyl acrylate particles were added and the dispersion was continued. The viscosity of the paint after dispersion is 32.5 at room temperature.
mPa · s.

[Preparation of Developing Sleeve] An outer diameter of 16 mmφ and a width of 0.21 m were obtained in the same manner as in Example 1 using this paint.
Was coated on an aluminum cylindrical tube. After drying at 140 ° C. for 20 minutes, the coating layer having a weight of 85 mg and having a surface roughness Ra =
A 1.75 μm developing sleeve was obtained. The volume resistance measured by the OHP sheet was 0.85 Ωcm.

[Image Endurance Test] Using the toner of Example 1, the same image endurance test as in Example 1 was conducted. The results were good as shown in Graph 23, Graph 24, Tables 5 and 6.

Example 20 [Preparation of paint] Spherical ethyl acrylate particles crosslinked with a crosslinking agent having a number average particle size of 9.53 μm were used.
To 10 kg of ethyl acrylate particles, 200 g of dry silica having a specific surface area of 130 m ² / g by BET treated with aminosilane (H ₂ NCH ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ ) was added. Stirred for minutes. Next, paints were prepared according to the following compounding ratios. Phenol resin intermediate 100 parts by weight Ethyl acrylate particles 10 parts by weight Crystalline graphite having an average particle size of 2 μm 30 parts by weight Carbon black 5 parts by weight 350 parts by weight The above copolymer is previously dissolved in toluene. Graphite and carbon were added thereto and dispersed by a sand mill. Further, the above-mentioned ethyl acrylate particles were added and the dispersion was continued. The viscosity of the paint after dispersion is 32.5 at room temperature.
mPa · s.

[Preparation of Developing Sleeve] Using this coating material, in the same manner as in Example 1, an outer diameter of 16 mmφ and a width of 0.21 m
Was coated on an aluminum cylindrical tube. It was dried at 140 ° C. for 20 minutes, and had an adhesion weight of 85 mg.
A 1.85 μm developing sleeve was obtained. The volume resistance measured by the OHP sheet was 0.83 Ωcm.

[Image Endurance Test] Using the toner of Example 1, the same image endurance test as in Example 1 was conducted. As shown in Tables 5 and 6, good results were obtained through the durability test. The change in solid black image density was almost the same as in Example 19.

Example 21 [Preparation of paint] Polyethylene particles having a number average particle diameter D1 of 7.5 μm were used. Nigrosine (150 g) was added to the polyethylene particles (10 kg) and fixed to the particle surface in the same manner as in Example 1. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight Polyethylene particles 14 parts by weight Crystalline graphite having an average particle diameter of 2 μm 30 parts by weight Conductive carbon black 5 parts by weight Methanol 50 parts by weight Isopropyl alcohol 250 parts by weight The viscosity of the paint was measured at room temperature. However, 65.5mPa
s.

[Preparation of Developing Sleeve] Using the above coating material, coating was performed in the same manner as in Example 1, and the surface roughness Ra of the coating layer was measured.
= 1.78 μm. The measurement of the volume resistance value using the OHP sheet was 1.14 Ωcm.

[Image Endurance Test] An image endurance test was performed on the above-mentioned sleeve in the same manner using the same toner as in Example 1. The solid black image change during the durability test was good (Graph 25 and Graph 26). The surface roughness after the end of the durability test was 1.48 μm. Table 5 shows other evaluation results.
And Table 6.

Example 22 [Preparation of paint] Crosslinked PMM having a number average particle size of 3.10 μm
The aminosilane ((C ₄ H ₉ ) ₂ NCH ₂ CH
Specific surface area 30 treated with ₂ CH ₂ Si (OCH ₃ ) ₃ )
30 g of dry silica of 0 m ² / g was added and fixed to the particle surface at an ambient temperature of 90 ° C. using a 10 L Henschel mixer. The particle surface was covered with silica. Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 20 parts by weight Crystalline graphite having an average particle size of 2 μm 25 parts by weight Conductive carbon black 3 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight Sand milling the above raw materials using glass beads Was dispersed. After diluting the methanol solution of the phenol resin intermediate with isopropyl alcohol, graphite and carbon are added and dispersed with a sand mill. Further, the above PMMA particles are added for dispersion. After the dispersion was completed, the dispersion was separated from the glass beads, and the viscosity of the paint was measured at room temperature.
It was 5 mPa · s.

[Preparation of Developing Sleeve] A developing sleeve was coated using this paint. An A3-size aluminum cylindrical tube having an outer diameter of 32 mmφ was set up on a work stand, rotated by a motor, and applied while lowering the spray gun at a constant speed to obtain a developing sleeve having a uniform film thickness. This was dried in a drying furnace at 140 ° C. for 30 minutes to obtain a developing sleeve sample. The adhesion weight of the paint after drying was 280 mg. The surface roughness of the coating layer is Ra
Was 1.05 μm. An OHP sheet was wound around another cylindrical tube, coated in the same manner, and the volume resistance of the film on the OHP sheet was measured.
m.

[Image Output Durability Test] Next, using this developing sleeve, an image output durability test was performed using a copying machine NP-6060 manufactured by Canon Inc. Developing sleeve is NP-60
It was processed into a size that could be incorporated into a developing device for No. 60, and was used by incorporating a magnet inside and stainless steel flanges at both ends. NP-6060 was replenished with toner every time the residual test was turned on as usual, and a 500,000-sheet image output durability test was performed. FIG. 2 is a schematic view showing the vicinity of the developing sleeve of NP-6060. 30,000 sheets continuously for one day, the environment at 23 ° C / 55% RH, 30 ° C / 80% RH, 15 ° C every two days
/ 10% RH. Furthermore, the outer diameter of the developing sleeve before and after the durability test was measured with a laser length measuring machine,
The abrasion resistance of the coating film was confirmed.

[Production of Toner] In this evaluation, the following toner was used. Polyester resin 100 parts by weight Magnetite 90 parts by weight Charge control agent 4 parts by weight Low molecular weight polypropylene 6 parts by weight After mixing these materials using a Henschel mixer, kneading using a twin-screw extruder, and after cooling, hammer After pulverizing with a mill, it was pulverized with a jet mill to obtain a finely pulverized product. This was classified by an elbow jet classifier, and the weight average particle size D4 was 6.70 μm, 4.0 μm.
A classified product was obtained in which the number% of the following particles was 16.8%, and the weight% of particles having a particle size of 10.1 μm or more was 1.8%. This classification 1
1.3 parts by weight of hydrophobic colloidal silica was externally added and mixed with 00 parts by weight, and used as a toner.

[Evaluation Results] Graph 27 and graph 28 show part of the transition of the solid black image density during the durability test. Good image density was obtained throughout the durability test. Ghost, fog, etc. were also good. The surface roughness after the endurance test is R
a = 0.96 μm. As a result of laser measurement, the decrease in film thickness was 4.8 μm. Table 5 and Table 6 show the evaluation results.
Put together.

Comparative Example 7 [Preparation of Developing Sleeve] A developing sleeve was prepared in the same manner as in Example 22 except that the coating material of Example 22 was not treated with dry silica. The weight after curing is 280mg and the volume resistance is 1.00Ωc
m, and the surface roughness of the coating layer was Ra = 1.07 μm.

[Image Endurance Test] This sample was incorporated into an NP-6060 developing machine in the same manner as in Example 14, and the same image endurance test as in Example 14 was conducted. Graphs 43 and 44 show part of the change in solid black image density during the durability test.
Shown in In the latter half of the durability test, a decrease in image density was observed.

Comparative Example 8 [Preparation of paint] PMMA particles 10k having a particle diameter of 40.0 μm
g of aminosilane ((C ₄ H ₉ ) ₂ NCH ₂ CH ₂ CH ₂ S
The same treatment as in Example 22 was carried out using 100 g of dry silica having a specific surface area of 130 m ² / g by BET treated with i (OCH ₃ ) ₃ ). Next, paints were prepared at the following compounding ratios. Phenol resin intermediate 100 parts by weight PMMA particles 20 parts by weight Crystalline graphite having an average particle size of 2 μm 25 parts by weight Conductive carbon black 3 parts by weight Methanol 60 parts by weight Isopropyl alcohol 240 parts by weight Sand milling the above raw materials using glass beads Was dispersed. After a methanol solution of the phenol resin intermediate is diluted with isopropyl alcohol, graphite and carbon are added and dispersed with a sand mill. Furthermore, the above PMM
A particle is added and dispersed. After the dispersion, the glass beads were separated from the paint.

[Preparation of Developing Sleeve] A sleeve was coated using this paint. An A3-size aluminum cylindrical tube having an outer diameter of 32 mmφ was set up on a work stand, rotated by a motor, and applied while lowering the spray gun at a constant speed to obtain a developing sleeve having a uniform film thickness. This was dried in a drying furnace at 140 ° C. for 30 minutes to obtain a developing sleeve sample. Adhesion weight after curing is 28
0 mg, the volume resistance value of the coating layer was 2.34 Ωcm, and the surface roughness was Ra = 3.87 μm.

[Image Output Durability Test] The sample was assembled in an NP-6060 developing device in the same manner as in Example 15, and the image output durability test was performed in the same manner as in Example 22. As the durability test progressed, the concentration decreased. The evaluation results are shown in graphs 45 and 46. When the surface roughness was measured after 20,000 sheets of images were formed, it was found to be Ra = 0.51 μm, which was a large decrease. Under an electron microscope, the particles had fallen off, and the aluminum base had begun to appear.

Example 23 [Preparation of paint] Crosslinked PMM having a number average particle size of 1.94 μm
The aminosilane ((C ₄ H ₉ ) ₂ NCH ₂ CH
_{2 CH 2 Si (OCH 3)} 3) treated with a specific surface area 200m
40 g of ² / g alumina fine powder was added and fixed to the particle surface in the same manner as in Example 14. Next, paints were prepared at the following compounding ratios. Methyl methacrylate homopolymer 100 parts by weight PMMA particles 20 parts by weight Conductive carbon black 25 parts by weight Toluene 430 parts by weight The methyl methacrylate homopolymer is previously dissolved in toluene. Add carbon black and disperse well using a sand mill. Thereafter, PMMA particles are added for further dispersion. After the dispersion, the mixture was separated from the glass beads, and the viscosity of the paint was measured at room temperature.
-It was s.

[Production of Developing Sleeve] A sample of a developing sleeve was obtained in the same manner as in Example 14 using this paint. The outer diameter used was 20 mmφ. The attached weight is 150 mg, and the surface roughness of the coating layer is Ra = 0.96 μm.
m, and the volume resistance was 0.99 Ωcm.

[Image Output Durability Test] Next, using this developing sleeve, image output durability was evaluated using a copying machine GP-55 manufactured by Canon Inc. The developing sleeve was used by being incorporated in a developing device for GP-55. The GP-55 was replenished with toner every time the residual test was turned on as usual, and a 200,000-sheet image endurance test was performed. 10,000 sheets continuously for one day, 23 ° C / 55% RH, 30 ° C / 80% R every 2 days
H, 15 ° C./10% RH. Further, the outer diameter of the developing sleeve before and after the endurance was measured by a laser measuring machine, and the wear resistance of the coating film was confirmed.

[Production of Toner] In this evaluation, the following toner was used. Styrene butyl acrylate copolymer 100 parts by weight Magnetite 75 parts by weight Charge control agent 3 parts by weight Low molecular weight polypropylene 7 parts by weight After mixing these materials using a Henschel mixer, kneading using a biaxial extruder After cooling, the mixture was pulverized by a hammer mill and then pulverized by a jet mill to obtain a finely pulverized product. This was classified by an elbow jet classifier, and the weight average particle diameter D4 was 8.43 μm, 4.0 μm.
A classified product was obtained in which the number% of the following particles was 11.5%, and the weight% of particles having a particle size of 12.7 μm or more was 1.0%. This classification 1
1.0 part by weight of hydrophobic colloidal silica was externally added and mixed with 00 parts by weight, and used as a toner.

[Evaluation Results] Graphs 29 and 30 show a part of the transition of the solid black image density during the durability test. Good image density was obtained throughout the durability test. Ghost, fog, etc. were also good. The surface roughness after the endurance test is R
a = 0.87 μm. As a result of laser measurement, the decrease in film thickness was 5.4 μm. Table 5 shows other evaluation results.
And Table 6.

Table 1

Table 2

Table 3

Table 4

Table 5

Table 6

[0145]

As described above, by using the constitution of the present invention, the durability and the charging property can be improved as compared with the prior art, and a good image can be retained for a long time. That is, even in repeated image formation, a stable and appropriate charge is applied, and a high-quality image can be obtained which is uniform, has no unevenness, and has no image density reduction or ghost. Further, by improving the abrasion resistance of the resin coating layer or reducing the toner adhesion, the above-mentioned image can be maintained for a long period of time. Further, a developer carrier having the above performance can be provided stably, simply, and at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic view of the vicinity of a developer carrier of a developing device incorporating the developer carrier of the present invention.

FIG. 2 is a schematic view of the vicinity of a developer carrying member of a developing device incorporating the developer carrying member of the present invention.

FIG. 3 is a schematic view of the vicinity of a developer carrier of a developing device incorporating the developer carrier of the present invention.

FIG. 4 is a schematic view of the vicinity of a developer carrier of a developing device incorporating the developer carrier of the present invention.

FIG. 5 shows the results of the image forming evaluation test of Example 1,
5 is a graph (graph 1) showing a change in image density up to 00 sheets.

FIG. 6 is a graph (Graph 2) showing a change in image density up to 500 sheets in the image output evaluation test of Example 1.

FIG. 7 shows the results of the image forming evaluation test of Example 2,
7 is a graph showing a change in image density up to 00 sheets (Graph 3).

FIG. 8 is a graph (Graph 4) showing a change in image density up to 500 sheets in the image output evaluation test of Example 2.

FIG. 9 shows the results of the image formation evaluation test of Example 3,
6 is a graph (graph 5) showing a change in image density up to 00 sheets.

FIG. 10 shows 500 in the image evaluation test of Example 3.
7 is a graph showing a change in image density up to a sheet (graph 6).

FIG. 11 shows the results of 30 and 30 in the image output evaluation test of Example 4.
7 is a graph showing a change in image density up to 000 sheets (Graph 7).

FIG. 12 shows 500 in the image evaluation test of Example 4.
9 is a graph showing a change in image density up to the number of sheets (graph 8).

FIG. 13 shows the results of 30 and 30 in the image output evaluation test of Example 6.
9 is a graph showing a change in image density up to 000 sheets (Graph 9).

FIG. 14 shows 500 in the image-drawing evaluation test of Example 6.
12 is a graph (graph 10) showing a change in image density up to the number of sheets.

FIG. 15 shows the results of 30 and 30 in the image output evaluation test of Example 7.
Graph showing image density change up to 000 sheets (Graph 1
1).

FIG. 16 shows 500 in the image evaluation test of Example 7.
12 is a graph (graph 12) showing a change in image density up to the number of sheets.

FIG. 17 shows the results of the image generation evaluation test of Example 8;
Graph showing image density change up to 000 sheets (Graph 1
3).

FIG. 18 is a graph showing the 500 in the image evaluation test of Example 8.
15 is a graph showing a change in image density up to a sheet (graph 14).

FIG. 19 shows 3 in the image output evaluation test of Example 10.
Graph showing image density change up to 0000 sheets (Graph 1
5).

FIG. 20 shows 50 of the image formation evaluation test of Example 10.
16 is a graph showing a change in image density up to 0 sheets (graph 16).

FIG. 21 shows a result of the image output evaluation test of Example 11;
Graph showing image density change up to 0000 sheets (Graph 1
7).

FIG. 22 shows a result of 50 in an image evaluation test of Example 11.
19 is a graph (graph 18) showing image density change up to zero sheets.

FIG. 23 shows a result of the image output evaluation test of Example 12;
Graph showing image density change up to 0000 sheets (Graph 1
9).

FIG. 24 shows a result of an image-evaluation evaluation test of Example 12.
20 is a graph showing a change in image density up to zero sheets (Graph 20).

FIG. 25 shows a result of an image generation evaluation test of Example 13;
Graph showing image density change up to 0000 sheets (Graph 2
1).

FIG. 26 shows a result of 50 in the image evaluation test of Example 13.
24 is a graph (graph 22) showing a change in image density up to zero sheets.

FIG. 27 shows 3 in the image output evaluation test of Example 19.
Graph showing image density change up to 0000 sheets (Graph 2
3).

FIG. 28 shows a result of a test in an image output evaluation test of Example 19.
25 is a graph showing a change in image density up to zero sheets (Graph 24).

FIG. 29 shows a result of the image output evaluation test of Example 21;
Graph showing image density change up to 0000 sheets (Graph 2
5).

FIG. 30 shows a result of an image output evaluation test of Example 21.
27 is a graph showing a change in image density up to zero sheets (graph 26).

FIG. 31 shows a result of 50 in an image evaluation test of Example 22.
28 is a graph showing a change in image density up to 10,000 sheets (Graph 27).

FIG. 32 shows a result of 50 in the image output evaluation test of Example 22.
28 is a graph (graph 28) showing a change in image density up to zero sheets.

FIG. 33 shows a result of an image evaluation test of Example 23.
30 is a graph (graph 29) showing a change in image density up to 10,000 sheets.

FIG. 34 shows a result of the evaluation in the image output evaluation test of Example 23.
30 is a graph showing a change in image density up to zero sheets (Graph 30).

FIG. 35 shows the results of the image forming evaluation test of Comparative Example 1;
Graph showing the image density change up to 000 sheets (Graph 3
1).

FIG. 36 shows 500 in the image formation evaluation test of Comparative Example 1.
33 is a graph (graph 32) showing a change in image density up to the number of sheets.

FIG. 37 shows the results of 30 and 30 in the image output evaluation test of Comparative Example 2.
Graph showing the image density change up to 000 sheets (Graph 3
3).

FIG. 38: 500 in the image evaluation test of Comparative Example 2
35 is a graph showing a change in image density up to the number of sheets (graph 34).

FIG. 39 shows the results of an image evaluation test of Comparative Example 3;
Graph showing the image density change up to 000 sheets (Graph 3
5).

FIG. 40: 500 in the image output evaluation test of Comparative Example 3
37 is a graph (graph 36) showing a change in image density up to sheets.

FIG. 41 shows the results of 30 and 30 in the image output evaluation test of Comparative Example 4.
Graph showing the image density change up to 000 sheets (Graph 3
7).

FIG. 42: 500 in the image evaluation test of Comparative Example 4
39 is a graph (graph 38) showing a change in image density up to a sheet.

FIG. 43 shows the results of 30 and 30 in the image output evaluation test of Comparative Example 5.
Graph showing the image density change up to 000 sheets (Graph 3
9).

FIG. 44: 500 in the image output evaluation test of Comparative Example 5
40 is a graph (graph 40) showing a change in image density up to the number of sheets.

FIG. 45 shows the results of 30 and 30 in the image output evaluation test of Comparative Example 6.
Graph showing the image density change up to 000 sheets (Graph 4
1).

FIG. 46: 500 in the image evaluation test of Comparative Example 6
A graph showing a change in image density up to the number of sheets (graph 42).

FIG. 47 is a graph (graph 43) showing a change in image density up to 500,000 sheets in an image output evaluation test of Comparative Example 7.

FIG. 48: 500 in the image evaluation test of Comparative Example 7
44 is a graph (graph 44) showing a change in image density up to the number of sheets.

FIG. 49 shows the results of Comparative Example 8 in which an
Graph showing the image density change up to 000 sheets (Graph 4
5).

FIG. 50: 500 in the image out evaluation test of Comparative Example 8
47 is a graph (graph 46) showing a change in image density up to the number of sheets.

[Explanation of symbols]

 1: photosensitive drum 2: regulating blade 3: hopper 4: developer (toner) 5: magnet 6: metal cylinder 7: resin coating layer 8: developing sleeve 9: gap 10: developing bias power supply 11: developing roller 12: developing Roller 13: developing sleeve 20: elastic regulating blade 21: elastic regulating blade N1, S1, N2, S2: magnetic pole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenji Fujishima 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Kazuki Saiki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inside the corporation

Claims (12)

[Claims] 1. A developer carrier used in a developing device, comprising a coating layer on a surface of the developer carrier substrate, wherein the coating layer has at least a binder resin and a number average particle diameter of 0.3. ~ 3
A developer carrier having a thickness of 0 μm and formed of resin particles having a charge-imparting substance adhered or fixed on the surface or on the surface and in the vicinity of the surface. 2. The developer carrier according to claim 1, wherein the coating layer is a conductive coating layer containing a conductive fine powder. 3. The developer carrier according to claim 1, wherein the coating layer contains a lubricating fine powder. 4. The developer carrier according to claim 1, wherein the resin particles are spherical. 5. The developer carrier according to claim 1, wherein the charge-providing substance is a charge control agent. 6. The charge-imparting substance is an inorganic fine powder treated with an aminosilane-based coupling agent.
3. The developer carrier according to item 1. 7. A container accommodating at least a developer, a developer carrying member for carrying and transporting the developer in the developing container, and transporting the developer to a development area close to the latent image carrying member; A developing device having a developer layer thickness regulating member that regulates the layer thickness of the developer on the developer carrier in proximity to or in pressure contact with the developer carrier, the developer carrier having a coating layer on its substrate surface, The coating layer is formed of at least a binder resin and resin particles having a number-average particle diameter of 0.3 to 30 μm, and a charge-imparting substance adhered or fixed on the surface or on or near the surface. A developing device. 8. The developing device according to claim 7, wherein the coating layer is a conductive coating layer containing a conductive fine powder. 9. The developing device according to claim 7, wherein the coating layer contains a lubricating fine powder. 10. The resin particles according to claim 7, wherein the resin particles are spherical.
3. The developing device according to claim 1. 11. The developing device according to claim 7, wherein the charge imparting substance is a charge control agent. 12. The charge-imparting substance is an inorganic fine powder treated with an aminosilane-based coupling agent.
The developing device according to claim 10.