JP2001130774A - Medium conveying belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medium conveying belt having excellent electrostatic attracting force, capable of easily scraping toner and ink, and having the front surface not to be easily damaged. SOLUTION: A conductive electrode pattern is formed on the tubular front surface made of high polymer materials, one or more electrode protecting layers are formed on it, and the outermost peripheral layer of the electrode protecting layers is constituted of a material having tensile elastic modulus of not less than 300 MPa.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium transport belt, and more particularly, to a belt used for transporting paper or OHP film used in an electrophotographic apparatus such as a copying machine, a laser beam printer or a facsimile, or an ink jet printer. Alternatively, the present invention relates to a belt used for conveying or drying paper or an OHP film of a bubble jet printer.

[0002]

2. Description of the Related Art Conventionally, in an electrophotographic apparatus such as a copying machine, paper is conveyed by placing the paper on a resin belt such as PC or vinylidene fluoride, or by conveying the resin belt in advance and charging the surface. A method has been known in which the paper is conveyed by adsorbing the paper by the charge.

[0003] On the other hand, the present inventor and the like have a problem in stability in transporting a medium by such a conventional transport method, and it is difficult to achieve high speed of a copying machine. A medium transport belt having heat resistance, electric resistance, and ink resistance was obtained according to the use conditions and the like. That is, an electrode pattern on the belt, and an electrode protective layer formed on this pattern,
By applying a voltage, the paper is electrostatically attracted, and by specifying the configuration and material properties of the belt, a medium transport belt having excellent paper transportability, heat resistance, withstand voltage, and the like is proposed.

[0004]

Such a medium transport belt is used for paper or OHP used in an electrophotographic apparatus such as a copying machine, a laser beam printer or a facsimile.
When used for transporting a film or the like, toner adheres to the belt surface and must be removed with a blade or brush.

[0005] Even when the medium transport belt is used for transporting or drying paper or OHP film in an ink jet printer or a bubble jet printer, ink adheres to the belt surface and must be removed with a blade or brush. is there.

When an operation of scraping toner or ink with such a blade or brush is performed, if the difference between the thickness of the portion including the electrode pattern and the thickness of the portion not including the electrode pattern is large, the thin portion may be removed. There is a problem that dents occur and toner and ink accumulate in the dents.

At this time, if a blade or brush is strongly pressed against the surface of the belt in order to scrape off the dents and ink, the surface will be damaged by the friction at that time, and the toner will be further damaged at the next use. There was a problem that ink and ink accumulated.

In addition, the belt surface is damaged due to the contact between the belt surface and other members inside the apparatus due to the use of the belt, and there is a problem that the toner or ink collects even if the damaged portion is scraped off with a blade or brush. .

Therefore, the present inventors have made it difficult to damage the surface while maintaining the excellent characteristics of the conventional medium transport belt.
In addition, as a result of extensive studies and studies to make it easier to remove toner and ink, long-term durability against scraping of toner and ink has been achieved by forming the outermost layer of the medium transport belt with a material with a tensile modulus of 300 MPa or more. Thus, the present inventors have conceived a medium transport belt according to the present invention, which has excellent transportability and has suction transportability.

[0010]

According to the present invention, there is provided a medium transport belt provided on an outer peripheral surface of a tubular member formed of a polymer material.
A medium transport belt in which an electrode pattern having conductivity is formed and one or more electrode protection layers are formed on the electrode pattern, wherein the outermost layer of the electrode protection layer has a tensile modulus of 300 MPa. That is all. The tensile modulus of the outermost layer can be preferably 1000 MPa or more.

The outermost layer may be composed of a resin alone, a composite resin obtained by mixing an additive with a resin, or an inorganic material.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a medium transport belt according to the present invention will be described in detail with reference to the drawings.

In the medium transport belt of the present invention, a conductive electrode pattern is formed on the outer peripheral surface of a tubular article formed of a polymer material, and one or more electrode protective layers are formed on the electrode pattern. The outermost layer has a tensile modulus of elasticity of 300 MPa or more, preferably 10 MPa or more.
It is composed of a material of 00 MPa or more.

In the present invention, the tensile modulus is determined according to JIS.
It is measured by a method according to K7127. More specifically, a 100-μm film was used as a material, and a No. 1 type test piece was prepared.
, The test speed was 450 mm / min and the three-point average was taken.

In the case where the outermost layer of the medium transport belt has a tensile modulus of elasticity of 300 MPa or less, if the blade is strongly pressed and rotated to scrape off toner or ink, the surface is damaged in a short period of time. Toner and ink remain on the scratched part.

The medium transport belt of the present invention is, for example, shown in FIG.
And a medium transport belt 10 as shown in FIG. That is, a conductive electrode pattern 1 is formed on the outer peripheral surface of a tubular article 12 formed of a polymer material.
4 is formed, and a single electrode protective layer 16 made of a resin alone or a composite resin obtained by mixing an additive with the resin is formed on the electrode pattern 14. At this time, the electrode protection layer 16 forms the outermost layer of the belt, and has a tensile elastic modulus of 300 MPa or more, preferably 1000 MPa.
It is composed of a material of MPa or more.

Alternatively, the medium transport belt of the present invention may be configured as shown in FIG. In this case, a conductive electrode pattern 14 is formed on the outer peripheral surface of the tubular article 12 formed of a polymer material,
An electrode protection layer 16 is formed on the electrode pattern 14,
Further, an outer electrode protection layer (hereinafter, also referred to as an outer layer, outermost layer) 20 is formed. At this time, the electrode protection layer 16
The tensile modulus of the outer electrode protection layer 2 is not particularly limited.
0 is a tensile modulus of 300 MPa or more, preferably 100
It is made of a material of 0 MPa or more.

As described above, in the present invention, in the medium transport belt in which one or two electrode protective layers are provided on the electrode pattern, the material constituting the outermost peripheral layer has a tensile modulus of elasticity of 300 MPa or more. Alternatively, a medium transport belt in which three or more electrode protection layers are provided on the electrode pattern is formed, and the material forming the outermost layer is made of a material having a tensile modulus of 300.
MPa or more.

In the medium transport belt of the present invention, as shown in FIG. 4, the medium transport belt 10 in which the electrode pattern 14 and the electrode protection layer 16 are laminated on the outer peripheral surface of the tubular material 12 as appropriate, as shown in FIG. A resin layer 26 of the same material and substantially the same thickness as the electrode protection layer 16
It is also preferred to form The obtained medium transport belt 28
Can be prevented from warping.

Further, as shown in FIG. 5, an electrode pattern 14 and an electrode protection layer 16 are laminated on the outer peripheral surface of the tubular object 12, and the electrode protective layer 16 is provided on the inner peripheral surface side of the tubular object 12.
In the medium transport belt 10 provided with the resin layer 26 made of the same material as
The medium transport belt 30 may be configured by forming an outer electrode protection layer 20 for protecting the electrode protection layer 16 on the surface of the medium transport belt 30. In this case, if the material of the outer electrode protection layer 20 has a tensile modulus of 300 MPa or more, the resin layer 2 on the inner peripheral surface side may be used.
It need not be the same as 6. Further, it is preferable that a resin layer 32 made of the same material as that of the outer electrode protection layer 20 be provided with substantially the same thickness on the inner surface of the resin layer 26 on the inner peripheral surface side of the medium transport belt 30.

Here, the polymer material forming the tubular article of the present invention is, for example, an engineering plastic, and specifically, polyamide 6, polyamide 66, polyamide 46, polyamide MXD6, polycarbonate,
Polyacetal, polyphenylene ether, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), polyarylate, liquid crystal polyester, polyphenylene sulfide, polysulfone, polyethersulfone, polyetheretherketone, polyetherimide, Select from the group consisting of polyamide imide, aramid, non-thermoplastic polyimide, thermoplastic polyimide, fluororesin, ethylene vinyl alcohol copolymer, polymethylpentene, phenolic resin, unsaturated polyester resin, epoxy resin, silicone, and diallyl phthalate resin One or a combination of two or more of these is preferred. Among them, particularly preferably, although not limited, for example, a material having a tensile modulus of 2000 MPa or more and / or
Alternatively, the material may have a glass transition temperature of 150 ° C. or higher.
In order to increase the modulus of elasticity and the glass transition temperature, the polymer material may be reinforced with fillers, fibers and the like. here,
The glass transition temperature is measured by a method according to JIS K7121. Alternatively, the polymer material forming the tubular article is a non-thermoplastic polyimide resin or a thermoplastic polyimide resin.

Among them, a thermoplastic polyimide resin having a glass transition temperature Tg of 150 ° C. or higher, more preferably 230 ° C. or higher can be used. The medium transport belt of the present invention is used for paper or OHP in electrophotographic devices such as copiers, laser beam printers, and facsimile machines.
A belt used for transporting a film or the like, or a belt used for transporting or drying paper or an OHP film of an inkjet printer device or a bubble jet printer device. Therefore, the thermoplastic polyimide resin constituting the medium transport belt has a glass transition temperature Tg of 150 ° C. or higher, more preferably 230 ° C. or higher, under the use conditions of the belt. The polyimide resin functions as a heat-resistant resin.

Next, an example of the thermoplastic polyimide resin used for the medium transport belt of the present invention will be described. The thermoplastic polyimide film, unlike a conventional non-thermoplastic (thermosetting) polyimide film, has melt flowability in a predetermined high temperature range while having heat resistance, and is excellent in workability. Also,
The adhesiveness of the joint portion in the heat resistant resin belt of the present invention is excellent as compared with a non-thermoplastic polyimide film. The thermoplastic polyimide according to the present invention has a chemical structural formula represented by the general formula (1)

[0024]

Embedded image

(Where m and n are integers, the ratio of m / n is in the range of 0.01 to 100, A and B are both tetravalent organic groups, and X and Y are It represents a divalent organic group.)
It is preferable that the structure represented by is a main component. Further, the general formula (1) derived from a monomer of an acid dianhydride
A in which general formula (2) gives thermoplasticity

[0026]

Embedded image

(In the formula, R ₁ and R ₂ each represent a divalent organic group.) It is preferable that at least one selected from the group of tetravalent organic groups represented by the following formula: Further, B in the general formula (1) is

[0028]

Embedded image

It is preferable that at least one selected from the group of tetravalent organic groups represented by Further, as the diamine, X and Y in the general formula (1) are derived from a monomer that imparts thermoplasticity.

[0030]

Embedded image

(In the formula, R ₃ represents a divalent organic group.)
And 5

[0032]

Embedded image

It is preferable that at least one selected from the group of divalent organic groups represented by

Here, an example of a method for producing a thermoplastic polyimide applicable to the heat-resistant resin belt of the present invention will be described. The thermoplastic polyimide is first prepared from an acid dianhydride having an ester group in the molecular chain represented by the general formula (2) (preferably 10
-90 mol%) and an aromatic dianhydride (preferably pyromellitic dianhydride) represented by the above formula (3), and a diamine represented by the above formula (3) Are reacted in an organic solvent to obtain a polyamic acid solution which is a polyimide precursor solution. Then, by further heating and drying to imidize, polyimide is obtained. However, this embodiment is an exemplification and is not limited to this.

As the film of the polymer material used for the medium transport belt, for example, a film made of only the above-mentioned thermoplastic polyimide may be used, but a film obtained by mixing a mixture obtained by adding another resin to the thermoplastic polyimide is used. May be used.

The non-thermoplastic polyimide film used for the medium transport belt of the present invention is represented by the general formula (4)

[0037]

Embedded image

(Where R ₄ is

[0039]

Embedded image

Wherein R ₅ is a hydrogen atom or a monovalent substituent, and m and n are integers. ) Can be used, but the film is not limited to this.

Some non-thermoplastic polyimide films include:
It includes all resins represented as thermosetting polyimide resins or reaction-curing polyimide resins. As the non-thermoplastic polyimide film, for example, a film made of only a non-thermoplastic polyimide resin may be used, or a film made of a non-thermoplastic polyimide film mixed with an additive may be used. To mix additives into the non-thermoplastic polyimide film, the precursor is mixed with the additives.

More specifically, a method of forming a tubular material represented by the tubular material 12 in FIG. 1 will be described. A non-thermoplastic polymer material film is joined at both ends with a thermoplastic material to form a tubular material. Method, a method of forming a tubular by heating and joining both ends of the thermoplastic polymer material film,
Alternatively, a method can be used in which a non-thermoplastic polymer material film and a thermoplastic polymer material film are laminated with their butted end positions shifted, formed into a tube, and heated and joined to form a tube. further,
It is also possible to use a method in which a non-thermoplastic polymer material or a thermoplastic polymer material is directly formed into a tube by a mold or the like, a method in which a varnish is formed, and a method in which the material is uniformly applied on a mold.
The tubular article may be formed by any method and is not particularly limited. Further, the tubular article may be obtained by forming a predetermined electrode pattern and / or an electrode protective layer on a polymer material film and then forming a tubular article.

Electrodes 14 having a predetermined pattern are formed on the surface of the tubular object 12 shown in FIG. 1. The ends of the electrode patterns 14 are extended alternately so that a voltage can be applied. I have. The electrode pattern represented by the electrode pattern 14 in FIG. 1 is formed by screen-printing a conductive paste made of silver, copper, aluminum, carbon, or the like on the surface of a tubular object, or forming a metal foil or metal thin film of aluminum, copper, or the like on a tubular member. After being adhered to the surface of the object, it is formed into a predetermined pattern by etching, or formed into a predetermined pattern by depositing a metal such as aluminum through a mask on which the predetermined pattern is formed. Or to be configured. The electrode pattern is not limited to the shape of the electrode pattern 14 shown in FIG. 1. For example, the electrode pattern may be formed in a comb shape, and may be a pattern in which the comb teeth are engaged. The thickness of the electrode pattern is not particularly limited, but is preferably smaller than 10 μm, and more preferably smaller than 5 μm, in consideration of surface irregularities due to the electrode pattern. Further, the line width and pitch of the electrode pattern are arbitrary and can be set variously.

Further, in the figure, an electrode protection layer 1 is formed on the outer peripheral surface of the tubular body 12 on which the electrode pattern 14 is formed.
6, the electrode pattern 14 is protected from external force. The electrode protection layer may be formed with one layer, or may be formed with two or more layers. When the electrode protective layer is composed of one layer, the one layer is the outermost layer. When the electrode protection layer is composed of two or more layers, it is composed of an outermost layer and an inner layer. Among the electrode protection layers, a layer other than the outermost layer is also referred to as an electrode protection inner layer in this specification.

The material of the outermost layer or the material of the inner layer for protecting the electrode of the medium transport belt of the present invention is not particularly limited.
A simple resin, a composite resin, an inorganic material, or the like can be used. Here, the adjustment of the tensile modulus of the outermost layer is performed by selecting a resin having a high tensile modulus as a material, adding an additive that increases the tensile modulus to the composite resin, or selecting an inorganic material. Done by The composite resin is a resin in which an additive for increasing the elastic modulus, an additive for adjusting the volume resistivity, and / or an additive for adjusting the dielectric constant are mixed with the resin. In many cases, it means a resin to which an additive for increasing the tensile modulus is added. On the other hand, in the case of the composite resin forming the inner layer for protecting the electrode, an additive for increasing the tensile elastic modulus may or may not be added.

When a resin alone is used for the outermost layer of the medium transport belt of the present invention, examples of the resin alone include engineering plastics.
Polyamide 6, polyamide 66, polyamide 46, polyamide MXD6, polycarbonate, polyacetal,
Polyphenylene ether, PET (polyethylene terephthalate), PBT (polybutylene terephthalate),
PEN (polyethylene naphthalate), polyarylate, liquid crystal polyester, polyphenylene sulfide, polysulfone, polyethersulfone, polyetheretherketone, polyetherimide, polyamideimide, aramid, non-thermoplastic polyimide, thermoplastic polyimide, fluororesin, ethylene A resin containing at least one selected from the group consisting of vinyl alcohol copolymer, polymethylpentene, phenolic resin, unsaturated polyester resin, epoxy resin, silicone, and diallyl phthalate resin is preferable.

When a composite resin is used for the outermost layer, the resin used for the composite resin may be a thermoplastic resin,
Non-thermoplastic resins, rubbers, and thermoplastic elastomers are included. These include thermosetting resins, reaction-curing resins, and resins known as ionomers. More specifically, isobutylene maleic anhydride copolymer, AAS (acrylonitrile-acryl-styrene copolymer), AES (acrylonitrile-ethylene-styrene copolymer), AS (acrylonitrile-styrene copolymer), ABS (acrylonitrile- Butadiene-styrene copolymer), ACS (acrylonitrile-chlorinated polyethylene-styrene copolymer), MBS
(Methyl methacrylate-butadiene-styrene copolymer), ethylene-vinyl chloride copolymer, EVA (ethylene-vinyl acetate copolymer), EVA-based (ethylene-vinyl acetate copolymer), EVOH (ethylene-vinyl alcohol copolymer) ), Polyvinyl acetate, chlorinated vinyl chloride, chlorinated polyethylene, chlorinated polypropylene, carboxyvinyl polymer, ketone resin, norbornene resin, vinyl propionate, PE (polyethylene), PP (polypropylene), TPX, polybutadiene, PS (polystyrene) ), Styrene maleic anhydride copolymer, methacrylic acid,
EMAA (ethylene methacrylic acid), PMMA (polymethyl methacrylate), PVC (polyvinyl chloride),
Polyvinylidene chloride, PVA (polyvinyl alcohol), polyvinyl ether, polyvinyl butyral, polyvinyl formal, cellulosic, nylon 6, nylon 6 copolymer, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, copolymer nylon, Nylon MXD, nylon 46, methoxymethylated nylon, aramid, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), P
C (polycarbonate), POM (polyacetal),
Polyethylene oxide, PPE (polyphenylene ether), modified PPE (polyphenylene ether), PEE
K (polyetheretherketone), PES (polyethersulfone), PSO (polysulfone), polyaminesulfone, PPS (polyphenylenesulfide), PAR (polyarylate), polyparavinylphenol, polyparamethylenestyrene, polyallylamine, Aromatic polyester, liquid crystal polymer, PTFE (polytetrafluoroethylene), ETFE (tetrafluoroethylene-ethylene), FEP (tetrafluoroethylene-hexafluoropropylene), EPE (tetrafluoroethylene-hexafluoropropylene-perfluoroal, kill) Vinyl ether), PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether), PCTFE (polychlorotrifluoroethylene), ECTFE (ethylene Chlorotrifluoroethylene), PVDF (polyvinylidene fluoride-based),
PVF (polyvinyl fluoride), PU (polyurethane), phenolic resin, urea resin, melamine resin,
Guanamine resin, vinyl ester resin, unsaturated polyester, oligoester acrylate, diallyl phthalate, DKF resin, xylene resin, epoxy resin, furan resin, PI (polyimide), PEI (polyetherimide), PAI (polyamideimide), acrylic Silicone, silicone, poly (p-hydroxybenzoic acid),
Maleic resin, NR (natural rubber), IR (isoprene rubber), SBR (styrene butadiene rubber), BR (butadiene rubber), CR (chloroprene rubber), IIR
(Isobutylene / isoprene rubber), NBR (nitrile butadiene rubber), EPM (ethylene propylene rubber), EPDM (ethylene propylene diene rubber), C
PE (chlorinated polyethylene rubber), CSM (chlorosulfonated polyethylene rubber), ACM (acrylic rubber), ethylene acrylic rubber, U (urethane rubber), silicone rubber, fluoro rubber, ethylene tetrafluoroethylene propylene rubber, CHR (epichlorohydrin rubber) ), Polysulfide rubber, hydrogenated nitrile rubber, polyether-based special rubber, liquid rubber, norbornene rubber, TPO (olefin-based thermoplastic elastomer), TPU (urethane-based thermoplastic elastomer), PVC (PVC-based thermoplastic elastomer), TPS
(Styrene-based thermoplastic elastomer), TREE (polyester-based thermoplastic elastomer), PA-based (polyamide elastomer), PB-based (butadiene elastomer), soft fluororesin, fluoroelastomer, elastic epoxy resin, etc. or selected from these. And combinations of two or more resins.

These resins may be used alone or as a material for forming the electrode protection inner peripheral layer of the medium transport belt of the present invention.
It is used as a combination of two or more resins or as a resin in a composite resin.

When the medium transport belt of the present invention is exposed to a high temperature, the resin used is Tg.
Is preferably a resin having a temperature of 150 ° C. or higher. More preferably, it is a polyimide resin or a thermoplastic polyimide resin having a Tg of 150 ° C. or higher.

In order to prevent leakage current under high temperature and high humidity, maintain high adsorption force under high temperature and high humidity, and to prevent dielectric breakdown when paper absorbs ink, The lower the water absorption of the resin, the better. In particular, use environment 30
When an adsorption force at 80 ° C. and 80% RH is required, it is preferable to use a resin having a water absorption of 1% or less, and more preferably a resin having a water absorption of 0.5% or less.

Here, the water absorption is a value measured based on JIS K7209. More specifically, the film of the test piece was dried for 24 ± 1 hour in a constant temperature bath maintained at 50 ° C. ± 2 ° C., and the weight of the product cooled in a desiccator was set to W1, and immersed in distilled water for 24 hours. The weight of the surface from which water droplets were wiped off was designated as W2, and the water absorption (%) = (W2-W
1) Calculate by the formula of ÷ W1 × 100. Hereinafter, this measurement and calculation method will be used when referring to the water absorption in the present specification.

Specifically, a chlorosulfonated polyethylene rubber having a water absorption of 1% or less, an olefin resin, a styrene resin, an acrylic resin, a silicone resin, an aromatic resin, a polyacetal resin, a polyvinylidene chloride resin Resin, polyvinyl chloride resin, amide resin, urethane resin, nitrile resin, phenol resin, urea resin, melamine resin, guanamine resin, vinyl ester resin, epoxy resin, furan resin, and fluorine resin At least one selected resin or chlorosulfonated polyethylene rubber having a water absorption of 1% or less, olefin resin, styrene resin, acrylic resin, silicone resin, aromatic resin, polyacetal resin, polychlorinated resin Vinylidene resin, polyvinyl chloride resin, System resin, urethane resin, nitrile resin, phenol resin, urea resin, melamine resin,
Guanamine resin, vinyl ester resin, epoxy resin,
A mixed resin containing at least 30 vol% of at least one resin selected from the group consisting of a furan resin and a fluorine-based resin is exemplified.

When a resin having a water absorption of 1% or less is used, it is preferable because a suction force and a dielectric breakdown resistance under high temperature and high humidity are imparted to the medium transport belt.

Further, when it is desired to impart ink resistance to the belt surface, among these resins, an ink-resistant resin is preferable.

Here, the ink-resistant resin is not limited, but may be selected from a fluorine resin, an olefin resin, a styrene resin, an acrylic resin, a silicone resin, a polyacetal resin, and an aromatic resin. At least one kind of resin or these resins
ol% or more.

Examples of such an ink-resistant resin include PTFE (polytetrafluoroethylene), ETF
E (tetrafluoroethylene-ethylene), FEP (tetrafluoroethylene-hexafluoropropylene),
EPE (tetrafluoroethylene-hexafluoropropylene-perfluoroal, kill vinyl ether), P
FA (tetrafluoroethylene-perfluoroalkyl vinyl ether), PCTFE (polychlorotrifluoroethylene), ECTFE (ethylene-chlorotrifluoroethylene), PVDF (polyvinylidene fluoride), PVF (polyvinyl fluoride), vinylidene fluoride -Hexafluoropropylene, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene rubber, vinylidene fluoride-pentafluoropropylene rubber, vinylidene fluoride-pentafluoropropylene-tetrafluoroethylene rubber, vinylidene fluoride-perfluoromethyl Vinyl ether-tetrafluoroethylene rubber, vinylidene fluoride-chlorotrifluoroethylene rubber, fluoro rubber ( Table, the DAI-EL T-530, Daiel T-630 thermoplastic fluorine rubber (Daikin Kogyo Co., Ltd.)), a soft fluorine resin (typically, Sefurarusofuto G150F100N, Sefurarusofuto G15
0F200), fluorine elastomer, isobutylene maleic anhydride copolymer, AAS (acrylonitrile-acryl-styrene copolymer), AES (acrylonitrile-ethylene-styrene copolymer), AS (acrylonitrile-styrene copolymer), ABS (acrylonitrile) -Butadiene-styrene copolymer), ACS (acrylonitrile-chlorinated polyethylene-styrene copolymer), MBS (methyl methacrylate-butadiene-styrene copolymer), ethylene-vinyl chloride copolymer, EVA
(Ethylene-vinyl acetate copolymer), EVA (ethylene-vinyl acetate copolymer), EVOH (ethylene-vinyl alcohol copolymer), chlorinated vinyl chloride, chlorinated polyethylene, chlorinated polypropylene, carboxyvinyl polymer, norbornene Resin, PE (polyethylene), PP (polypropylene), TPX, polybutadiene, PS (polystyrene), styrene maleic anhydride copolymer, methacryl, EMAA (ethylene methacrylic acid), PMMA (polymethyl methacrylate), polyvinyl ether, polyvinyl butyral , Polyvinyl formal, NR (natural rubber), IR (isoprene rubber),
SBR (styrene butadiene rubber), BR (butadiene rubber), CR (chloroprene rubber), IIR (isobutylene / isoprene rubber), NBR (nitrile butadiene rubber), EPM (ethylene propylene rubber), EPDM
(Ethylene propylene diene rubber), CPE (chlorinated polyethylene rubber), CSM (chlorosulfonated polyethylene rubber), ACM (acrylic rubber), ethylene acrylic rubber, norbornene rubber, TPO (olefin-based thermoplastic elastomer), TPS (styrene-based) Thermoplastic elastomer), PB type (butadiene elastomer), PVC
(PVC), PVC (PVC thermoplastic elastomer), silicone rubber, acrylic silicone, PO
M, PEEK, PEK, PPE, PPS, PSF, PE
It may be at least one or a combination of two or more selected from S, PBT, PET, PEN, PC, PAR, and liquid crystal polyester.

Among such ink-resistant resins, a resin having a specific structure can be preferably used. Specifically, -CH ₂ -CF ₂ - or a fluorine-based resin having a structure of _{-CH 2 -CHF-; -CH 2 -CCl 2} - polyvinylidene chloride having a structure of the resin; -CH ₂ -CHC
a polyvinyl chloride resin having a 1- structure; and -CH
_2- CR ₁ R _2- (R ₁ is H, CH ₃ , Ph, COO
X and R ₂ are H, CH ₃ , Ph, COOX, and X is an organic group. Examples include, but are not limited to, olefin-based resins, styrene-based resins, and acrylic resins having the structure of (1).

These resins also serve as the resin of the material of the composite resin of the outermost peripheral layer, and also as the resin of the resin alone, the mixed resin or the material of the composite resin forming the electrode protection inner peripheral layer. The ink resistance is preferably given to the outermost layer.

Additives added to the resin to increase the tensile modulus of the outermost layer include inorganic ceramics such as titanium oxide, magnesium oxide, alumina, silica, potassium titanate, titanium nitride, and boron nitride, mica, and clay. Examples include minerals, layered compounds such as carbon black, carbon fibers, and metals. The shape of these additives is spherical, acicular,
Any of a plate shape may be used, but a needle type is particularly preferable. This is because, in the case of the needle type, the tensile modulus can be improved even when the addition ratio is small. The content ratio of the additive is 50% with respect to the volume of all the materials forming the outermost layer.
vol% or less, preferably 30 vol% or less, more preferably 10 vol% or less. When the proportion of addition increases, the insulating properties are adversely affected. When the solid additive is kneaded with the material, the mixture is uniformly mixed using a hot roll, a single-screw or twin-screw kneader, or the like.

When the outermost layer is made of an inorganic material, examples of the inorganic material include a hard coat material utilizing a chemical reaction such as a sol-gel reaction or an organic reaction. Specific examples include organic silicon-based compounds, organic titanium-based compounds, organic aluminum-based compounds, organic zirconium-based compounds, and organic boron-based compounds. A mixture containing two or more of these may be used.

These inorganic materials may further contain an inorganic additive. As inorganic additives added to inorganic materials, silica, alumina, zirconia, titania, silicon carbide, silicon nitride, boron nitride, mullite, magnesia, steatite, forsterite, zircon, cordierite, glass, mica, etc. Examples include ceramic materials and clay minerals. A mixture of two or more of these may be used.

In the present invention, regardless of whether the electrode protective layer has a single-layer structure or a structure having two or more layers, the outermost layer has a pencil scratch value of B or more, preferably H or more, more preferably 3H or more. is there. Here, the pencil scratch value is JI
It is a value measured by a method specified in S K 5400.

In the present invention, the volume resistivity value of the outermost layer is not particularly limited. However, when there is an inner layer for protecting the electrode, it is preferably equal to or higher than the inner layer for protecting the electrode. If the volume resistivity of the outermost layer is lower than the volume resistivity of the electrode protection inner layer, no current flows through the paper,
Electric charges are less likely to be induced on the surface of the electrode protection layer, and the attraction force is reduced.

Although the thickness of the electrode protective layer is not particularly limited,
In the case of a two-layer structure of the electrode protection inner peripheral layer and the outermost layer or more, the outermost layer has a thickness of 25 μm or less, preferably 15 μm or less, more preferably 10 μm or less.
μm or less. When the thickness is 25 μm or more, the running property is deteriorated. In particular, when the volume resistivity of the outer layer is higher than the volume resistivity of the inner layer, the attraction force is extremely reduced, and the stability of paper conveyance is reduced. It is because it impairs. Also, the hardness is

The volume resistivity of the outermost layer is not particularly limited. However, if there is an electrode protection inner layer, it must be higher than the electrode protection inner layer.

Here, a conductive powder can be added to the resin in order to adjust the volume resistivity of the outermost layer or the electrode protection inner layer. As the conductive powder used,
Examples thereof include carbon powder, graphite, metal powder, metal oxide powder, metal oxide subjected to conductive treatment, an antistatic agent, and the like, and at least one or more conductive powders selected from these depending on the purpose. Used. The amount of the conductive powder to be added is appropriately set depending on the volume resistivity of the outermost layer of the target electrode protective layer, but is usually determined with respect to the total volume of the outermost layer or the inner layer of the electrode protective layer. Therefore, 2 to 50 vol% is preferable, and 3 to 30 vol% is more preferable. The size of the conductive powder is appropriately selected according to the purpose, but preferably has an average particle diameter of usually 50 μm or less, more preferably has an average particle diameter of 10 μm or less, and has an average particle diameter of 1 μm or less. Is more preferred.

Further, in order to adjust the dielectric constant of the outermost layer of the electrode protection layer or the inner layer of the electrode protection, high dielectric constant powder can be used. As the high dielectric constant powder used,
An inorganic powder having a dielectric constant of 50 or more is used, and examples thereof include titanium oxide, barium titanate, potassium titanate, lead titanate, lead niobate, zirconate titanate, and magnetic powder. More preferably, the dielectric constant is 10
Zero or more inorganic powders are preferably used, and examples thereof include barium titanate, lead zirconate titanate, titanium oxide, and magnetic powder. The shape of the high dielectric constant powder is not particularly limited, but may be, for example, spherical, flake, whisker, or the like, and at least one or more high dielectric constant powders selected from these according to the purpose are used. The size of the high dielectric constant powder is not particularly limited. For example, in the case of a spherical shape, the average particle diameter is preferably 50 μm or less, more preferably 10 μm or less, and the average particle diameter is more preferable. Is more preferably 1 μm or less. In the case of a whisker, the length is 50 μm or less,
Those having a diameter of 0.5 to 20 μm can be used. Further, the amount of the high dielectric constant powder to be added is appropriately set according to the dielectric constant of the outermost layer of the target electrode protective layer.
It is preferably from 50 to 50 vol%, more preferably from 10 to 30 vol%.

The volume resistivity of the inner peripheral layer of the electrode protective layer of the present invention is preferably 10 ⁹ to 10 ¹⁵ Ω · cm, more preferably 10 ¹⁰ to 10 ¹⁴ Ω · cm, and the dielectric constant is 3 0.0 or more, and preferably 5.0 or more. If the volume resistivity is lower than 10 ⁹ Ω · cm, insulation between the adjacent electrodes 14 is insufficient, and a leak current flows. Further, when the volume resistivity exceeds 10 ¹⁵ Ω · cm, electric charge is hardly induced on the surface of the electrode protection layer,
Adsorption power is reduced. Further, even after the voltage applied to the electrodes is removed, the residual charge remains for a long time, and the paper remains adsorbed, which is not preferable. On the other hand, when the dielectric constant falls below 3.0,
When the voltage is applied, the electric charge on the belt surface becomes insufficient, and the adsorbing power of the paper becomes insufficient, which is not preferable.

In any case, the surface roughness Ra of the outermost peripheral surface of the medium transport belt of the present invention is preferably 0.5 μm or less, and more preferably 0.2 μm or less.

The example of the configuration of the medium transport belt according to the present invention has been described above. Next, an example of a method of manufacturing the medium transport belt will be described using the medium transport belt 10 as an example. First, a tubular material 12 made of a polymer material serving as a base is formed as a seamless belt by a casting method, and an electrode pattern 14 is formed on the outer surface of the tubular material 12. Further, the electrode protective layer 16 is formed by, for example, a coating method except for the end portions of the electrode patterns 14 that extend alternately on the outer peripheral surface, and the medium transport belt 10 is manufactured.

Further, after a film is formed in advance from a polyimide resin, both ends of the film are joined to form a belt to obtain a tubular material 12, and then an electrode pattern 14 and an electrode protection layer 16 are formed in the same manner as described above. The medium transport belt 10 may be manufactured by performing the following steps. Alternatively, as shown in FIG. 6, an electrode pattern 14 is formed on the surface of a film 18 formed of a polyimide resin, and then an electrode protection layer 16 is further formed as shown by a two-dot chain line. May be joined to form a belt shape to manufacture the medium transport belt 10. Further, after the electrode pattern 14 is formed on the surface of the film 18 formed of a polyimide resin, both ends of the film 18 are joined to form a belt, and then the electrode protection layer 16 is further formed as shown by a two-dot chain line. Thus, the medium transport belt 10 can be manufactured.

In these manufacturing methods, the electrode protection layer 1
The method of forming 6 is to form the electrode protection layer 16 by, for example, coating the resin in a varnish form and applying the varnish on the electrode pattern 14, or to previously form the electrode protection layer in a film form, There is a method of laminating or winding one or more layers of the film on the electrode pattern 14 to form the electrode protection layer 16. Examples of the laminating method or the winding method include, but are not limited to, a thermocompression bonding method using a hot press method or a hot roll method. In addition, after preparing the electrode protective layer in a liquid state, spraying it with a spray method, using a roll or comma coater, dipping or applying,
By drying or curing, the electrode protective layer of the present invention can be formed.

The method for manufacturing the medium transport belt of the present invention can be appropriately selected according to the purpose of the obtained medium transport belt, and is appropriately selected according to the material of the tubular object 12. Further, the manufacturing method can be appropriately set in accordance with the structure of another medium transport belt.

Although the medium transport belt according to the present invention has been described above, the above-described embodiment is merely an example, and it is needless to say that the present invention is not limited to this. In addition, it is possible to arbitrarily perform various treatments on the surface of the obtained medium transport belt, and the present invention can be variously improved, modified, and modified based on the knowledge of those skilled in the art without departing from the gist of the present invention.
The present invention can be implemented in a modified mode.

[0075]

EXAMPLES In the following examples, the inner protective layer for each electrode protection and
And the volume resistivity of the outermost layer are as follows
It is. Soft fluororesin; 5 × 10¹¹Ω · cm, PVD
F-HFP; 1.0 × 10¹³Ω · cm, PVDF;
0x10^FifteenΩ · cm, PVDF-HFP / TiO_Two;
1.0 × 10¹³Ω · cm, polyimide; 2.0 × 10 ¹⁶
Ω · cm, organic silicon compound; 1.0 × 10¹⁴Ω · cm
Above, urethane acrylate; 1.0 × 10¹⁴Ω · cm
Above, polyimide / carbon; 1.0 × 10^TenΩ · cm
Less than.

(Example 1) A non-thermoplastic polyimide film (Apical 50NPI (manufactured by Kanegabuchi Chemical Industry Co., Ltd.)) having a thickness of 50 μm was coated with an epoxy-based silver paste to form an electrode having a width of 6 μm.
An electrode pattern having a thickness of 10 mm, a distance between the electrodes of 3 mm, and a thickness of 10 μm was formed. On this electrode pattern, PVDF-HFP
(Kyner 2801 (manufactured by Kureha Chemical Co., Ltd.) 25 μm)
50kg / c at 200 ℃ using hot press
By bonding at a pressure of m ² , an electrode protection layer having a thickness of 25 μm was formed. The obtained film was formed into a tube to prepare a medium transport belt of the present invention.

In order to measure the paper adsorbing force of the medium transport belt, a DC voltage of 3 kV was applied between the electrodes of the electrode pattern, and as shown in FIG.
%) The lower A5 size paper 40 was adsorbed to the belt (10) (NN adsorption). Thereafter, the paper 40 is pulled in a direction parallel to the surface of the belt (10) in the direction of the arrow in FIG.
The maximum force at the time of movement was measured as the adsorption force. As shown in Table 1, the medium transport belt of the present invention was very excellent in the NN adsorption force of paper.

The evaluation of the ink removal property of the medium transport belt was performed as follows. After carrying the paper for 24 hours using a belt, ink jet ink (cyan, magenta, yellow, black) is dropped on the electrode protection layer, and the electrode protection layer is coated with a urethane blade (hardness 65 to 75, hardness: 75 to 75).
Tensile strength 200-400 kgf / cm ² , elongation 300-
400%, tensile modulus of 45 to 80 kgf / cm ² )
It was scraped off with a force of about 3 kg and the appearance was observed. In Table 1,
9 shows the tensile modulus, the ink scraping property, and the NN adsorption force of the outermost layer of the obtained medium transport belt. In Table 1, with respect to the scraping property of the ink, "x" indicates that the surface was scratched and the ink was not sufficiently removed, and "o" indicates that the surface was not scratched and the ink was sufficiently removed. Like that. As shown in Table 1, the medium transport belt of the present invention obtained in Example 1 was excellent in ink scraping property.

[0079]

[Table 1]

(Example 2) PVDF-HF was used for the electrode protection layer.
A medium transport belt was obtained in the same manner as in Example 1, except that PVDF (# 1000 (Kureha Chemical Co., Ltd., 25 μm)) was used instead of the P film.

In the same manner as in Example 1, the NN adsorbing power of the paper 40 and the ink scraping property were measured. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. The obtained medium transport belt was also excellent in the NN adsorption force of the paper 40 and the ink scraping property.

Example 3 A 50 μm-thick non-thermoplastic polyimide film (Apical 50NPI (manufactured by Kaneka Chemical Co., Ltd.)) was coated with an epoxy silver paste to form an electrode having a width of 6 μm.
An electrode pattern having a thickness of 10 mm, a distance between the electrodes of 3 mm, and a thickness of 10 μm was formed. On this electrode pattern, a soft fluororesin (Sefuralsoft G150F200 (manufactured by Central Glass Co., Ltd.) 25 μm × 3 layers) film, PVDF-H
An FP (Kyner 2801 (manufactured by Elf Atochem Japan KK)) film was bonded using a hot press at 200 ° C. under a pressure of 50 kg / cm ² to form an electrode protection layer. The obtained film was formed into a tube to prepare a medium transport belt of the present invention.

In the same manner as in Example 1, the NN adsorbing force of the paper 40 and the ink scraping property were measured. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. The obtained medium transport belt was also excellent in the NN adsorption force of the paper 40 and the ink scraping property.

Example 4 The outermost layer of the electrode protection layer was PV
PVDF (# 1000) instead of DF-HFP film
(Medium transport belt) was obtained in the same manner as in Example 3 except that it was formed by (Kureha Chemical Co., Ltd. 25 μm).

In the same manner as in Example 1, the NN adsorptivity of the paper 40 and the ink scraping property were measured. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. The obtained medium transport belt was also excellent in the NN adsorption force of the paper 40 and the ink scraping property.

Example 5 The outermost layer of the electrode protection layer was PV
Instead of the DF-HFP film, PVDF-HFP contains titanium oxide whiskers at 10 vol% and has a thickness of 25 μm.
A medium transport belt was obtained in the same manner as in Example 3 except that the medium transport belt was formed of the above film.

In the same manner as in Example 1, the NN adsorbing force of the paper 40 and the ink scraping property were measured. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. The obtained medium transport belt was also excellent in the NN adsorption force of the paper 40 and the ink scraping property.

Example 6 The outermost layer of the electrode protection layer was PV
A medium transport belt was obtained in the same manner as in Example 3, except that a polyimide film (Apical AH (Kanebuchi Chemical Industry Co., Ltd., 12 μm)) was used instead of the DF-HFP film.

In the same manner as in Example 1, the NN adsorbing power of the paper 40 and the ink scraping property were measured. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. The obtained medium transport belt was also excellent in the NN adsorption force of the paper 40 and the ink scraping property.

Example 7 The outermost layer of the electrode protection layer was PV
The medium transport belt 10 was obtained in the same manner as in Example 3 except that the DF-HFP film was replaced with a hard coat material (Tosgard 510 (organic silicon compound, Toshiba Silicone Co., Ltd., 2 μm, hardness 6H or more)). More specifically, Tosguard 510 was formed by drying and curing at 100 ° C. for 1 hour after application.

In the same manner as in Example 1, the NN adsorbing power of the paper 40 and the ink scraping property were measured. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. The obtained medium transport belt was also excellent in the NN adsorption force of the paper 40 and the ink scraping property.

(Embodiment 8) The outermost layer of the electrode protection layer was PV
A medium transport belt was obtained in the same manner as in Example 3 except that a hard coat material (urethane acrylate (UV2700B, manufactured by Nippon Synthetic Chemical Co., Ltd., thickness 2 μm, hardness B)) was used instead of the DF-HFP film. Was.

In the same manner as in Example 1, the NN adsorbing force of the paper 40 and the ink scraping property were measured. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. The obtained medium transport belt was also excellent in the NN adsorption force of the paper 40 and the ink scraping property.

Comparative Example 1 PVDF-HF was used as the electrode protection layer.
Soft fluororesin (G150F20) instead of P film
0 (Central Glass Co., Ltd., 25 μm × 4 layers), except that a medium transport belt 10 was obtained in the same manner as in Example 1.

In the same manner as in Example 1, the NN adsorbing power of the paper 40 and the ink scraping property were evaluated. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. Although the paper 40NN adsorption power was excellent, the ink scraping property was inferior to Examples 1 to 7.

Example 9 The outermost layer of the electrode protection layer was 12
A medium transport belt was obtained in the same manner as in Example 6, except that the film was formed of a polyimide film of 50 μm instead of μm.

In the same manner as in Example 1, the NN adsorbing power of the paper 40 and the ink scraping property were evaluated. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. Although the ink scraping property was excellent, the paper 40NN adsorption power was inferior to Examples 1 to 8.

Example 10 The outermost layer of the electrode protection layer was 2
A medium transport belt was obtained in the same manner as in Example 7, except that a hard coat material (urethane acrylate (UV2700B, manufactured by Nippon Synthetic Chemical Co., Ltd., hardness B)) having a thickness of 30 μm instead of μm was used.

In the same manner as in Example 1, the paper 40 was evaluated for its NN adsorption power and ink scraping property. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. Although the ink scraping property was excellent, the paper 40NN adsorption power was inferior to Examples 1 to 8.

Example 11 A medium transport belt was obtained in the same manner as in Example 6 except that a polyimide film to which 10 vol% of carbon black was added was used instead of the polyimide film.

In the same manner as in Example 1, the paper 40 was evaluated for the NN adsorption power and the ink scraping property. Table 1 shows the tensile modulus, the ink scraping property, and the NN adsorption power of the outermost layer of the obtained medium transport belt. Although the ink scraping property was good, the paper 40NN adsorption power was inferior to Examples 1 to 8.

[0102]

According to the medium transport belt of the present invention, a conductive electrode pattern is formed on the outer peripheral surface of a tubular material formed of a polymer material, and an electrode protective layer is formed on the electrode pattern. Further, an outer peripheral layer is further formed as necessary. Since the outermost layer of the medium transport belt of the present invention has a tensile modulus of elasticity greater than 300 MPa, it has excellent long-term scraping properties of toner and ink, and can transport paper and OHP while sufficiently adsorbing it.

In the present invention, when the number of the electrode protective layers is two or more, the volume resistivity of the inner peripheral layer and the outer peripheral layer and the thickness thereof are adjusted so that not only the ink scraping property but also the adsorption property can be improved. It is possible to provide a medium transport belt that is extremely excellent in force.

Further, by using a resin having a water absorption of 1% or less for the electrode protective layer, a high electrostatic attraction force can be obtained even under high temperature and high humidity, and a belt excellent in dielectric breakdown resistance due to water absorption can be obtained. Can be provided.

Further, the resin for the electrode protection layer is made of a resin having an ink resistance, or an outer layer having an ink resistance is provided on the outer periphery of the electrode protection layer, so that the printing medium transport / dry belt for an ink jet printer can be obtained. Even in the case of using, not only sufficient attraction force of the print medium can be obtained, but also high electrostatic attraction force can be obtained even under high temperature and high humidity, having excellent dielectric breakdown resistance due to water absorption, and having ink resistance. Belt can be provided.

[0106]

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view of a medium transport belt according to the present invention.

FIG. 2 is an enlarged sectional explanatory view of a main part of the medium transport belt shown in FIG.

FIG. 3 is an enlarged sectional explanatory view of a main part showing another embodiment of a medium transport belt according to the present invention.

FIG. 4 is an enlarged sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.

FIG. 5 is an enlarged sectional explanatory view of a main part showing still another embodiment of the medium transport belt according to the present invention.

FIG. 6 is an explanatory plan view of a main part showing an embodiment of the method for manufacturing the medium transport belt shown in FIG. 1;

FIG. 7 is an explanatory plan view of a main part showing a method for testing the suction force of the medium transport belt according to the present invention.

[Explanation of symbols]

 10, 24, 28, 30: medium transport belt 12: tubular object 14: electrode pattern 16: electrode protection layer 18: film 20: outer peripheral layer 22, 26, 32: resin layer 40: paper

Claims (11)

[Claims] 1. A medium transporter in which a conductive electrode pattern is formed on the outer peripheral surface of a tubular article formed of a polymer material, and one or more electrode protection layers are formed on the electrode pattern. A medium transport belt, wherein the outermost layer of the electrode protection layer has a tensile modulus of 300 MPa or more. 2. The tensile strength of the outermost layer is 1000.
The medium transport belt according to claim 1, wherein the pressure is equal to or higher than MPa. 3. The medium transport belt according to claim 1, wherein the polymer material is a thermoplastic polyimide or a non-thermoplastic polyimide. 4. The method according to claim 1, wherein the outermost layer is made of a resin alone, a composite resin obtained by mixing an additive with the resin, or an inorganic material. Media transport belt. 5. The medium transport belt according to claim 4, wherein the additive is a tensile modulus adjuster. 6. The method according to claim 1, wherein the tensile modulus modifier is titanium oxide,
One or more kinds selected from the group consisting of magnesium oxide, alumina, silica, potassium titanate, titanium nitride, boron nitride, mica, clay mineral, carbon black, carbon fiber and metal. Item 6. A medium transport belt according to Item 5. 7. The method according to claim 1, wherein the inorganic material is an organic silicon compound,
The medium transport belt according to claim 4, wherein the medium transport belt is at least one selected from the group consisting of an organic titanium compound, an organic aluminum compound, an organic zirconium compound, and an organic boron compound. 8. The resin according to claim 1, wherein the resin is polyamide 6, polyamide 66, polyamide 46, polyamide MXD6, polycarbonate, polyacetal, polyphenylene ether,
PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PEN (polyethylene naphthalate), polyarylate, liquid crystal polyester, polyphenylene sulfide, polysulfone, polyethersulfone, polyetheretherketone, polyetherimide, polyamideimide, aramid, Non-thermoplastic polyimide, thermoplastic polyimide, fluororesin, ethylene vinyl alcohol copolymer, polymethylpentene, phenolic resin, unsaturated polyester resin, epoxy resin,
The medium conveyance belt according to claim 4, wherein the medium conveyance belt is at least one selected from the group consisting of silicone, acrylic resin, urethane resin, melamine coating material, and diallyl phthalate resin. 9. The medium transport belt according to claim 1, wherein a pencil scratch value of the outermost layer is B or more. 10. The electrode protection layer has a two-layer structure of an electrode protection inner peripheral layer and an outermost layer, and the outermost layer has a volume resistivity equal to or higher than the volume resistivity of the electrode protection inner layer. The medium transport belt according to claim 1, wherein the value is a value. 11. The medium transport belt according to claim 10, wherein the outermost layer has a thickness of 25 μm or less. [0000]