JP2000318865A - Medium carrying belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide high electrostatic attracting force and excellent dielectric breakdown resistance and ink resistance by forming an electrode protecting layer by use of a resin having volume natural resistance value and dielectric constant within specified ranges or a composite resin consisting of a mixture of the resin with an additive. SOLUTION: A medium carrying belt 10 comprises a tubular matter 12 formed of a polymer material, a conductive electrode pattern 14 formed on the circumferential surface thereof, and an electrode protecting layer 16 formed on the electrode pattern 14. The electrode protecting layer 16 has a volume effective resistance of 109-1015 Ω.cm and a dielectric constant of 3.0 or more. As the resin used for the electrode protecting layer 16, thermoplastic resin, non- thermoplastic resin, rubber and thermoplastic elastomer and the like are given. A resin known as ionomer is also included therein. More specifically, isobutylene maleic anhydride copolymer is given.

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 In an electrophotographic apparatus such as a copying machine, for example, paper is conveyed by placing the paper on a resin belt such as PC or vinylidene fluoride or by pre-charging the resin belt to impart a charge to the surface. In addition, a method is known in which paper is adsorbed and transported by the charge.

[0003]

In the method of transporting a paper placed on a resin belt, the paper and the belt often slip, and it is difficult to realize a stable transport. on the other hand,
In the method of adsorbing paper by charging the resin belt, the adsorbing power of the paper is insufficient, the paper cannot be accurately fixed on the belt, and the leading end of the paper rises during the conveyance. , There was a problem. In particular, in order to increase the speed of the printer, paper or O.D.
It is necessary to accurately adsorb a printing medium such as an HP film to a belt and to increase the adsorbing power. Further, even if the use environment changes, for example, even under high temperature and high humidity,
It was necessary to secure a sufficient paper suction force.

In the case of an ink jet printer or a bubble jet printer, it is necessary to dry ink at the same time as paper is conveyed. For this reason, the transport belt needs to have heat resistance, but in order to shorten the drying time, it is necessary to further improve the heat resistance in response to the high temperature. Moreover, the transport belt does not deteriorate due to the components of the ink, and the paper absorbs the water with the ink.
It was necessary to prevent dielectric breakdown. Furthermore, it is necessary that the surface of the ink does not deteriorate due to the adhesion of the ink to the belt surface. In many cases, since the ink is alkaline, it is necessary that the surface of the belt does not deteriorate against alkali.

[0005] In order to increase the speed of a printer or the like, the present inventors can strongly absorb a medium for printing or the like.
In order to obtain a medium transport belt with heat resistance, withstand voltage, and ink resistance, after extensive research and research, we have formed an electrode pattern on the belt and applied a voltage to electrostatically attract paper. By specifying the configuration and material properties of the belt, the present inventors have conceived a medium transport belt according to the present invention which is excellent in paper transportability, heat resistance, withstand voltage, and ink resistance.

[0006]

SUMMARY OF THE INVENTION The gist of the medium transport belt according to the present invention is that a conductive electrode pattern is formed on the outer peripheral surface of a tubular article formed of a polymer material. A medium transport belt having an electrode protection layer formed on an electrode pattern, wherein the electrode protection layer is made of a resin or a resin having a volume resistivity of 10 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 or more. It is a composite resin obtained by mixing an additive with a resin.

In the medium transport belt, the polymer material may be a polymer material having a tensile modulus of elasticity of 200 kg / mm ² or more.

In such a medium transport belt, the polymer material having a tensile modulus of 200 kg / mm ² or more may be a non-thermoplastic polyimide resin or a thermoplastic polyimide resin.

In the medium transport belt, the polymer material may be a polymer material having a glass transition temperature of 150 ° C. or higher.

In the medium transport belt, the additive may be either a conductive additive or a high dielectric constant additive, or both.

In the medium transport belt, the resin may be a polyimide resin.

In the medium transport belt, the polyimide resin may be a thermoplastic polyimide resin having a glass transition temperature of 150 ° C. or higher.

In the medium transport belt, the resin may be a resin having a water absorption of 1% or less.

In the medium transport belt, the resin having a water absorption of 1% or less is a chlorosulfonated polyethylene rubber, an olefin resin, a styrene resin, an acrylic resin, a silicone resin, an aromatic resin having a water absorption of 1% or less. Group resin, polyacetal resin, polyvinylidene chloride resin, polyvinyl chloride resin, amide resin, urethane resin, nitrile resin, phenol resin, urea resin, melamine resin, guanamine resin, vinyl ester resin, epoxy resin , A furan resin, and a fluororesin, at least one resin selected from the group consisting of chlorosulfonated polyethylene rubber having a water absorption of 1% or less, an olefin resin, a styrene resin, an acrylic resin, and a silicone resin. , Aromatic resin, polyacetal resin, polysalt Consists of vinylidene 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 It can be a mixed resin containing at least 30 vol% of at least one resin selected from the group.

In the medium transport belt, the resin having a water absorption of 1% or less may be an ink-resistant resin.

In such a medium transport belt, the above-described anti-a
Linking resin is -CH_Two-CR₁R _Two− (Where R₁
Or R_TwoIs H, CH_Three, Ph, or COOX
And X is an organic group).
Fat, styrene resin, or acrylic resin, or
-CH_Two-CR₁R_TwoAn olefin tree having a structure of-
30v of fat, styrene resin or acrylic resin
ol% or more.

In the medium transport belt, the ink-resistant resin may be polyacetal, polyetheretherketone, polyetherketone, polyphenyleneether, polyphenylenesulfide, polysulfone, polyethersulfone, polybutyleneterephthalate,
It may contain at least one or more resins selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, and liquid crystal polyester.

In this medium transport belt, the ink-resistant resin is -CF ₂ -CFR _3- (where R ₃ is
H, Cl or _{F), - CH 2 -CF 2} - or a fluorine resin or -CF ₂ -CFR ₃ having the structure -CH ₂ -CHF- - (wherein R ₃ is, H, Cl or F in a), - CH ₂ -CF ₂ - or -CH ₂ -
It may be a resin containing 30 vol% or more of a fluororesin having a CHF- structure.

[0019] In this medium transport belt, the ink resistance resin, -CH ₂ -CCl ₂ - polyvinylidene chloride-based resin having a structure of - polyvinylidene chloride resin or -CH ₂ -CCl ₂ having the structure 30 vol%
It may be a resin containing the above.

[0020] In this medium transport belt, the ink resistance resin, polyvinyl chloride resin having a polyvinyl chloride resin or -CH ₂ -CHCl- structure having a structure of -CH ₂ -CHCl- 30vol% It may be a resin containing the above.

In such a medium transport belt, an outer peripheral layer made of a resin having a water absorption of 1% or less can be formed on the outer peripheral surface of the electrode protective layer.

In the medium transport belt, the outer periphery
The layer has a volume resistivity of 10⁹-10 ¹⁵Ω · cm
And the dielectric constant may be 3.0 or more.

In the medium transport belt, a resin layer having the same composition as the electrode protection layer or the outer layer may be formed on the inner peripheral surface of the tubular member.

[0024]

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.

As shown in FIGS. 1 and 2, a medium transport belt 10 according to the present invention comprises a conductive electrode pattern 1 on the outer peripheral surface of a tubular material 12 formed of a polymer material.
4 and an electrode protection layer 16 is formed on the electrode pattern 14. The electrode protective layer 16 has a volume resistivity of 10 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 or more.

The volume specific resistance in the present invention is determined by preparing a material resin into a film of 100 μm and leaving it at a temperature of 20 ° C. and a humidity of 60% for 24 hours.
It is a value measured at a measurement voltage of 500 V using SM-10 manufactured by KK. The dielectric constant in the present invention is such that the material resin is 200 μm.
m and a value measured at a frequency of 1 kHz using AS-4245 manufactured by Ando Electric Co., Ltd. after standing at a temperature of 20 ° C. and a humidity of 60% for 24 hours. The diameter of the electrode used in each case is 38 mm.

The polymer material forming the tubular article 12 of the present invention
Is, for example, engineering plastic
Physically, polyamide 6, polyamide 66, polyamide
46, polyamide MXD6, polycarbonate, polya
Cetal, polyphenylene ether, PET (polyethylene
Rental terephthalate), PBT (polybutylene terephthalate)
Rate), PEN (polyethylene naphthalate), poly
Arylate, liquid crystal polyester, polyphenylene sulf
Sulfide, polysulfone, polyethersulfone, poly
Ether ether ketone, polyether imide, polya
Midimide, aramid, non-thermoplastic polyimide, thermoplastic
Polyimide, fluororesin, ethylene vinyl alcohol
Copolymer, polymethylpentene, phenolic resin, unsaturated
Japanese polyester resin, epoxy resin, silicone,
1 selected from the group consisting of
Types or combinations of two or more types are preferred. This
In particular, although not particularly limited, for example, tensile
The elastic modulus is 200kg / mm ^TwoThe above materials and / or
The material may have a glass transition temperature of 150 ° C. or higher. Elastic modulus
In order to increase the glass transition temperature,
May be reinforced with fillers or fibers. Where the tension
Elastic modulus is measured by a method according to ASTM D882.
The glass transition temperature is based on JIS K 7121.
It is measured by the following method. Alternatively, non-thermoplastic polyimide
Resin or 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 10 is a belt used for transporting paper or OHP film in an electrophotographic apparatus such as a copier, a laser beam printer, or a facsimile, or transporting paper or an OHP film in an inkjet printer apparatus or a bubble jet printer apparatus. A belt used for drying and the like. Therefore, under the use conditions of the belt, the thermoplastic polyimide resin constituting the medium transport belt 10 has a glass transition temperature Tg of 150 ° C. or more, more preferably 230 ° C. or more, so that the heat used at the glass transition temperature Tg or less is obtained. The plastic 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)

[0030]

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Where m and n are equal to the mole fraction of each repeating unit in the polymer chain, m ranges from about 0.1 to about 0.9, and n ranges from about 0.9 to about 0.1. Wherein the ratio of m to n is from about 0.01 to about 9.0.A and B are both tetravalent organic groups, and X and Y are divalent organic groups. It is preferable that the structure represented by the following formula) is a main component.
Further, as an acid dianhydride, A in the general formula (1) which is a monomer imparting thermoplasticity is represented by the general formula (2)

[0032]

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(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

[0034]

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 monomers that impart thermoplasticity.

[0036]

Embedded image

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

[0038]

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 following general formula (4).

[0043]

Embedded image

(However, R ₄ is

[0045]

Embedded image

Wherein R ₅ is a hydrogen atom or a monovalent substituent, m and n are integers,
m / n = 0.1 to 100. ) 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.

The method of forming the tubular material 12 will be described more specifically. A method of joining both ends of a non-thermoplastic polymer material film with a thermoplastic material to form a tubular material, and a method of forming a thermoplastic polymer material film A method of forming a tube by heating and joining both ends of the tube, or laminating a non-thermoplastic polymer material film and a thermoplastic polymer material film by displacing the positions of their butt ends and forming a tube. Alternatively, a method of forming a tube by heating and joining can be used. Furthermore, a method of directly forming a non-thermoplastic polymer material or a thermoplastic polymer material into a tubular shape using a mold or the like can be used. The tubular material 12 may be formed by any method, and there is no particular limitation.

Electrodes 14 having a predetermined pattern are formed on the surface of the tubular object 12, and the ends of the electrode patterns 14 are alternately extended so that a voltage can be applied. The electrode pattern 14 is formed by applying a conductive paste made of silver, copper, aluminum, carbon, or the like to the tubular object 10.
Alternatively, screen printing is performed on the surface of the electrode protection layer 16, or a metal foil or metal thin film such as aluminum or copper is applied to the surface of the tubular body 12, and then etched to form a predetermined pattern, or A predetermined pattern is formed by depositing a metal such as aluminum through a mask on which a predetermined pattern is formed. The electrode pattern 14 is not limited to the illustrated shape. For example, the electrode pattern 14 is formed in a comb shape.
A pattern in which the comb teeth mesh with each other can be obtained.

The thickness of the electrode pattern 14 is the same as that of the electrode pattern 1.
Taking into account the surface irregularities due to 4, the thickness is preferably 2 to 30 μm, and more preferably 5 to 20 μm. Further, the electrode pattern 14
The line width and the pitch are arbitrary and can be variously set.

Further, an electrode protection layer 16 is formed on the outer peripheral surface of the tubular article 12 on which the electrode pattern 14 is formed, so that the electrode pattern 14 is protected from external force.

The electrode protection layer 16 has a volume resistivity of 1
It is a resin simple substance or a composite resin having a dielectric constant of not less than ⁰⁹ to 10 ¹⁵ Ω · cm and 3.0 or more. Here, the composite resin refers to a resin obtained by mixing a conductive additive and / or a high dielectric constant additive into a single resin.

The resin used for the electrode protection layer 16 includes a thermoplastic resin, a non-thermoplastic resin, a rubber, and a thermoplastic elastomer. 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-styrene copolymer) Butadiene-styrene copolymer), ACS
(Acrylonitrile-chlorinated polyethylene-styrene copolymer), MBS (methyl methacrylate-butadiene-styrene copolymer), ethylene-vinyl chloride copolymer, EV
A (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, methacryl, 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), PC (polycarbonate), PO
M (polyacetal), polyethylene oxide, PPE
(Polyphenylene ether), modified PPE (polyphenylene ether), PEEK (polyether ether ketone), PES (polyether sulfone), PSO (polysulfone), polyamine sulfone, PPS (polyphenylene sulfide), PAR (polyarylate), poly Paravinylphenol, polyparamethylenestyrene, polyallylamine, aromatic polyester, liquid crystal polymer, PTFE (polytetrafluoroethylene), ETFE (tetrafluoroethylene-ethylene), FEP (tetrafluoroethylene-hexafluoropropylene), EPE (tetra Fluoroethylene-hexafluoropropylene-perfluoroal, kill vinyl ether), PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether) ), PCTFE (polychlorotrifluoroethylene), ECTFE (ethylene-chlorotrifluoroethylene), PVDF (polyvinylidene fluoride), PVF (polyvinyl fluoride), PU (polyurethane), phenolic resin, urea resin, melamine-based 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), EP
M (ethylene propylene rubber), EPDM (ethylene propylene diene rubber), CPE (chlorinated polyethylene rubber), CSM (chlorosulfonated polyethylene rubber), ACM (acrylic rubber), ethylene acrylic rubber, U (urethane rubber), silicone rubber , Fluoro rubber, tetrafluoroethylene propylene rubber, CHR (epichlorohydrin rubber), polysulfide rubber, hydrogenated nitrile rubber, special polyether rubber, liquid rubber, norbornene rubber, TPO (olefin thermoplastic elastomer), T
PU (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), Examples thereof include a soft fluorine resin, a fluorine-based elastomer, an elastic epoxy resin, and the like, or a combination of two or more resins selected from these.

Of these, the medium transport belt 1 of the present invention
When 0 is exposed to a high temperature, the resin forming the electrode protection layer 16 is preferably a resin having a Tg 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.

Among these, 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 forming the electrode protection layer 16, the better. In particular, when an adsorbing force at a use environment of 30 ° C. and 80% RH is required, it is preferable to use a resin having a water absorption of 1% or less, more preferably 0.5% or less. Specifically, chlorosulfonated polyethylene rubber having an absorption of 1% or less, olefin resin, styrene resin, acrylic resin, silicone resin, aromatic resin, polyacetal resin, polyvinylidene chloride resin, Selected from the group consisting of vinyl 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 resin or 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 , Polyvinyl chloride resin, amide resin, c Tan resins, nitrile resins, phenol resins, urea resins, melamine resins,
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. Here, the water absorption rate is JISK
This is a value measured based on 7209. More specifically, the film of the test piece was dried for 24 ± 1 hour in a thermostat kept at 50 ° C. ± 2 ° C., and the weight of the product cooled in a desiccator was set to W ₁ and immersed in distilled water for 24 hours. And the weight of the surface after wiping off water droplets is defined as W ₂ , and the water absorption (%) =
It is calculated by the formula (W ₂ −W ₁ ) ÷ W ₁ × 100. Hereinafter, this measurement and calculation method will be used when referring to the water absorption in the present specification.

When a resin having a water absorption of 1% or less is used for the electrode protective layer, the medium conveying belt 10 is preferably provided with an adsorbing force and a dielectric breakdown resistance under high temperature and high humidity. Further, when it is desired to impart ink resistance to the belt surface, the electrode protective layer is made of a single resin of the ink-resistant resin or a composite resin obtained by mixing a conductive additive and / or a high dielectric constant additive with the ink-resistant resin. It is preferred that Alternatively, an outer peripheral layer is further provided around the electrode protective layer, and the outer peripheral layer is formed of a single resin of the ink-resistant resin or a composite resin obtained by mixing a conductive additive and / or a high dielectric constant additive with the ink-resistant resin. be able to.

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

Such an ink-resistant resin is, specifically, 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 rubber, vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene rubber, vinylidene fluoride-pentafluoropropylene rubber, vinylidene fluoride-pentafluoropropylene-tetrafluoroethylene rubber, vinylidene fluoride-par Fluoromethyl vinyl ether-tetrafluoroethylene rubber, vinylidene fluoride-chlorotrifluoroethylene rubber, fluorine Beam (typically, DAI-EL T-5
30, Daiel T-630 (Daikin Chemical Industry Co., Ltd.)
Thermoplastic fluororubber), soft fluororesins (typically, Cefralsoft G150F100N, Cefralsoft G150F200, etc.), 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), A
CS (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), 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) Arm), NBR (nitrile butadiene rubber), EPM (ethylene propylene rubber), E
PDM (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) Thermoplastic elastomer), PB (butadiene elastomer), P
VC (polyvinyl chloride), PVC (PVC thermoplastic elastomer), silicone rubber, acrylic silicone, P
OM, PEEK, PEK, PPE, PPS, PSF, P
It may be at least one or a combination of two or more selected from ES, 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).

The volume resistivity of the electrode protective layer 16 is 10 ⁹ to
10 ¹⁵ Ω · cm, preferably 10 ¹⁰ to 10 ¹⁴ Ω · cm
cm and the dielectric constant is 3.0 or more, 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. On the other hand, when the volume resistivity exceeds 10 ¹⁵ Ω · cm, electric charges are less likely to be induced on the surface of the electrode protection layer 16 and the attraction force 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, if the dielectric constant is less than 3.0, the electric charge on the belt surface becomes insufficient when a voltage is applied, and the adsorbing power of the paper becomes insufficient. In order to adjust the electrode protective layer 16 to have the above-mentioned predetermined volume resistivity and dielectric constant, it is preferable to appropriately mix a conductive powder and / or a high dielectric constant powder with a resin constituting the electrode protective layer. .

The conductive powder used for adjusting the volume resistivity of the electrode protective layer 16 includes carbon powder, graphite, metal powder, metal oxide powder, conductive-treated metal oxide, antistatic And at least one or more conductive powders selected from these depending on the purpose. The amount of the conductive powder to be added is appropriately set depending on the intended volume resistivity of the electrode protection layer 16, and is usually preferably 2 to 50 vol%, and more preferably 3 to 30 v%, based on the total volume of the electrode protection layer.
ol% is more preferred. 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.

The high dielectric constant powder used for adjusting the dielectric constant of the electrode protection layer 16 has a dielectric constant of 50%.
The above inorganic powders are used, and examples thereof include titanium oxide, barium titanate, potassium titanate, lead titanate, lead niobate, zirconate titanate, and magnetic powder. More preferably, an inorganic powder having a dielectric constant of 100 or more is 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 and the diameter is 0.
Those having a size of 5 to 20 μm can be used. Further, the amount of the high dielectric constant powder to be added is appropriately set depending on the desired dielectric constant of the electrode protection layer 16, and is usually 5 to 50 vol%.
Is preferable, and 10 to 30 vol% is more preferable.

Next, an example of a method of manufacturing the medium transport belt 10 will be described. However, the method of manufacturing the medium transport belt of the present invention is not limited to the following 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, an electrode protection layer 16 is formed by, for example, a coating method, except for the end portions of the electrode patterns 14 that alternately extend on the outer peripheral surface thereof.
The medium transport belt 10 is manufactured.

After a film is formed in advance from a polymer material, both ends of the film are joined to form a belt to obtain a tubular material 12, and then the electrode pattern 14 is formed in the same manner as described above.
And the electrode protection layer 16 may be formed to manufacture the medium transport belt 10. Alternatively, as shown in FIG. 3, after the electrode pattern 14 is formed on the surface of the polymer material film 18, an electrode protective layer 16 is further formed as shown by a two-dot chain line, and then both ends of the film 18 are joined. Then, the medium transport belt 10 may be manufactured in a belt shape. Further, after the electrode pattern 14 is formed on the surface of the film 18 made of a polymer material, both ends of the film 18 are joined to form a belt, and then the electrode protection layer 1 is further formed as shown by a two-dot chain line.
6, and the medium transport belt 10 can be manufactured.

The electrode protection layer 16 is formed by coating a raw material resin in a varnish shape and applying the varnish on the electrode pattern 14, or forming the raw material resin of the electrode protection layer in a film shape in advance, To electrode pattern 14
It can be formed by laminating on top. Examples of the latter lamination method include, but are not limited to, a thermocompression method using a hot press method or a hot roll method.

The method for producing 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 described below.

In addition to the structure shown in FIG. 1, the structure of the medium transport belt is, for example, as shown in FIG. 4, on the electrode pattern 14 and the electrode protection layer 16 laminated on the outer peripheral surface of the tubular body 12, and further on the electrode protection layer. An outer peripheral layer 20 for protecting 16 may be formed. As the outer peripheral layer 20, for example, any of resins that can be a material of the electrode protection layer 16 can be used. Among these resins, a resin having a water absorption of 1% or less, more preferably a resin having ink resistance can be used. Here, the resin having a water absorption of 1% or less or ink resistance is:
This is the same as the resin used as the material of the electrode protection layer 16. Further, as shown by a two-dot line in the figure, a resin layer can be formed on the inner peripheral surface of the tubular object 12. By forming a resin layer 22 of the same material and substantially the same thickness as the outer peripheral layer 20 on the inner peripheral surface of the tubular object 12, the obtained medium transport belt 24 can be prevented from warping.

As shown in FIG. 5, in 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, the electrode protective layer 16 is formed on the inner peripheral surface side of the tubular material 12. It is also preferable to form the medium transport belt 28 by providing a resin layer 26 made of the same material as that of the above with substantially the same thickness. By making the cross-sectional structure substantially symmetrical except for the electrode pattern 14, it is possible to prevent the medium transport belt 28 from warping.

Further, as shown in FIG. 6, 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 formed by forming an outer peripheral layer 20 for protecting the electrode protective layer 16 on the surface of the medium transport belt 30. In this case, the material of the outer peripheral layer 20 does not need to be the same as that of the resin layer 26 on the inner peripheral surface side. Further, it is preferable to provide a resin layer 32 made of the same material as that of the outer peripheral layer 20 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.

Further, as shown in FIG. 7, 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 pattern 34 and the electrode protective layer 16 are similarly formed on the inner peripheral surface side of the tubular object 12. It is also possible to form the medium transport belt 38 by laminating the electrode protection layers 36. The electrode pattern 34 formed on the inner peripheral surface side of the tubular object 12 may be located symmetrically with the electrode pattern 14 on the outer peripheral surface side as shown in FIG. It may be an intermediate position with respect to the electrode pattern 14 on the surface side. As described above, by providing the electrode pattern 34 also on the inner peripheral surface side of the tubular object 12 and making the cross-sectional structure substantially symmetric, it is possible to prevent the occurrence of warping or the like even for long-term use.

In the medium transport belt 38 shown in FIG. 7 and FIG.
Numeral 4 may be a dummy which does not function as an electrode, and the electrode pattern 14 on the outer peripheral surface and the electrode pattern 3 on the inner peripheral surface may be used.
It is also possible to adopt a configuration in which a voltage can be applied between the voltage control circuit 4 and the control circuit 4, and there is no particular limitation. Electrode pattern 3 on inner surface
4, the medium transport belt 10 has a completely symmetrical structure, and in particular, warpage of the belt end can be prevented.

While 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.
It may be implemented in a modified manner.

[0073]

Example 1 A non-thermoplastic polyimide film (12) having a thickness of 50 μm (Apical 50NPI (manufactured by Kaneka Chemical Co., Ltd.)) using an epoxy-based silver paste as shown in FIGS. Then, an electrode pattern 14 having an electrode width of 10 mm, a distance between the electrodes of 3 mm, and a thickness of 10 μm was formed.

Next, an electrode protection layer 16 was manufactured using a non-thermoplastic polyimide resin as a main raw material. First, DMF (dimethylformamide) 410 was placed in an ice bath in a nitrogen atmosphere.
After adding 5.6 g of carbon black (# 2700: manufactured by Mitsubishi Chemical Corporation) to 20 g of ODA (4
4 ′, diaminodiphenyl ether) and 21.8 g of PMDA (pyromellitic dianhydride) were further dissolved and mixed. A polyamic acid solution of about 2,000 poise was measured at 23 ° C. This solution is applied on the electrode pattern 14 so that the thickness after drying becomes 50 μm, and is applied at 100 ° C. for 10 minutes, 150 ° C. for 5 minutes, and 20 μm.
The electrode protection layer 16 having a thickness of 50 μm was formed by sequentially drying at 0 ° C. for 5 minutes and at 300 ° C. for 5 minutes. The volume resistivity of the electrode protection layer 16 is 2. × 10 ¹³ Ω · c
m, the dielectric constant was 8.0, and the water absorption was 2.5%. Thereafter, the film (10) was joined in a belt shape to obtain a medium transport belt 10.

In order to measure the paper adsorbing force of the medium transport belt 10, a DC voltage of 3 kV was applied between the electrodes of the electrode pattern 14, and as shown in FIG.
(60%) The lower A4 size paper 40 was adsorbed to the belt 10. Thereafter, the paper 40 was pulled in a direction parallel to the surface of the belt 10 in the direction of the arrow in the figure, and the maximum force when the paper 40 was moved was measured as the attraction force. Table 1 shows the results.
The adsorption power was very good.

(Examples 2 to 5) A medium transport belt 10 was obtained in the same manner as in Example 1 except that the electrode protective layer 16 was formed of the components shown in Table 1. That is, the electrode protection layer 1
In Example 2, conductive titanium oxide (ET-600W: Ishihara Sangyo Co., Ltd.) was used as the non-thermoplastic polyimide resin.
In Example 3, 30 vol% of barium titanate (BT-100P: Fuji Titanium Co., Ltd.) was added to the non-thermoplastic polyimide resin, and in Example 4, carbon black was added to the non-thermoplastic polyimide resin. 5vo
1% and 30 vol% of barium titanate,
In Example 5, a non-thermoplastic polyimide resin was formed by adding 5 vol% of conductive titanium oxide and 30 vol% of barium titanate. The specific volume resistivity and dielectric constant of the obtained electrode protection layer 16 were as shown in Table 1. Then, in the same manner as in Example 1, the attraction force of the paper 40 was measured. Table 1 shows the results. The adsorption power was very good.

Example 6 The electrode protection layer 16 was made of a urethane resin (Y258: Dainichi Seika Co., Ltd.) having a volume resistivity of 2.4 × 10 ¹² Ω · cm and a dielectric constant of 7.0. Except for forming, the medium transport belt 1 was formed in the same manner as in the first embodiment.
0 was obtained. Then, similarly, the attraction force of the paper 40 was measured. Table 1 shows the results.

Comparative Example 1 Example 1 was repeated except that the electrode protective layer 16 was formed of a non-plastic polyimide resin having a volume resistivity of 1.0 × 10 ¹⁶ Ω · cm and a dielectric constant of 3.0. In the same manner as in the above, a medium transport belt 10 was obtained. And
Similarly, the attraction force of the paper 40 was measured. As shown in Table 1, the adsorption force of the paper 40 was very poor.

(Comparative Examples 2 to 3) A medium transport belt 10 was obtained in the same manner as in Example 1 except that the electrode protective layer 16 was formed of the components shown in Table 1. That is, the electrode protection layer 1
Comparative Example 2 was obtained by adding 20 vol% of carbon black to a non-thermoplastic polyimide resin in Comparative Example 2, and 30 vol. Of conductive titanium oxide was added to the non-thermoplastic polyimide resin in Comparative Example 3.
It was formed by adding 1%. The specific volume resistivity and dielectric constant of the obtained electrode protection layer 16 were as shown in Table 1. Then, in the same manner as in Example 1, the attraction force of the paper 40 was measured. As shown in Table 1, the adsorption force of the paper 40 was very poor.

Comparative Example 4 The electrode protective layer 16 was formed of a polypropylene resin (F112ZB: manufactured by Grand Polymer) having a volume resistivity of 1.0 × 10 ¹⁸ Ω · cm and a dielectric constant of 3.0. Except for the above, a medium transport belt 10 was obtained in the same manner as in Example 1. Then, in the same manner,
An adsorption force of 0 was measured. The results are shown in Table 1,
The adsorbing power of the paper 40 was very poor.

[0081]

[Table 1]

(Examples 7 to 13)
In the same manner as in Example 1, except that
Thus, a medium transport belt 10 was obtained. That is, the electrode protection layer
16 and the volume resistance value of 5.1 × 10 in Example 7.⁹Ω ・ c
amide resin with a dielectric constant of 10 and a dielectric constant of 10
C # # 560: Fuji Kasei Kogyo Co., Ltd.
Resistance value 8.4 × 10 ¹¹Ω · cm, dielectric constant 4.2, water absorption
0.4 amide resin (Tomide # 1360: Fuji Kasei
In the ninth embodiment, the volume resistance value is 1.4 × 10¹⁴
Amide resin (Ω · cm, dielectric constant 4, water absorption 0.4)
Myd # 560 and Tomide # 394: Fuji Chemical
(9: 1 mixture), and in Example 10, the volume resistance value
3.0 × 10¹⁶Ω · cm, dielectric constant 3.2, water absorption 0.3
Amide resin (Tomide # 394: Fuji Chemical Industry)
10% by volume of carbon black
However, in Example 11, the volume resistance value was 3.0 × 10¹⁶Ω ・ c
amide resin having a dielectric constant of 3.2, a dielectric constant of 3.2 and a water absorption of 0.3 (Toma
Id # 394: Fuji Kasei Kogyo Co., Ltd.)
20% by volume, the volume resistance in Example 12
Value 3.0 × 10¹⁶Ω · cm, dielectric constant 3.2, water absorption 0.
No. 3 amide resin (Tomide # 394: Fuji Chemical Co., Ltd.)
Co., Ltd.) with an antistatic agent (Reolex AS: manufactured by Daiichi Kogyo Co., Ltd.)
20% by volume of Yakuhin Co., Ltd .;
Volume resistance 3.0 × 10¹⁶Ω · cm, dielectric constant 3.2, absorption
Amide resin with water content of 0.3 (Tomide # 394: Fujika
(Seiko Kogyo Co., Ltd.) added 30 vol% of barium titanate
Formed. Specific volume of the obtained electrode protection layer 16
The resistance and the dielectric constant were as shown in Table 2. And the real
In the same manner as in Example 1, the NN adsorption force of the paper 40 was measured.
Table 2 shows the results. Measurement environment is normal temperature and normal humidity is high temperature and high humidity
(30 ° C, 80%)
Then, the HH adsorption force of the paper 40 was measured. Table 2 shows the results.
As shown in FIG.
It was also excellent in strength.

In order to measure the withstand voltage of the medium transport belt 10, a DC voltage of 3 kV was applied between the electrodes of the electrode pattern 14, and as shown in FIG.
(60%) The lower A4 size paper 40 was adsorbed to the belt 10. Thereafter, the paper was wet with an automatic spray containing water to check for dielectric breakdown. Specifically, the applied voltage was kept constant at 3 kV, and sprayed and held for one minute. The measuring instrument has a mechanism for stopping the application of voltage when a current of 1 mA or more flows. Therefore, if a current of 1 mA or more flows after one minute, it is regarded as a dielectric breakdown. 1mA
If the current is kept constant at the following current values, no dielectric breakdown has occurred. In Table 2, "x" indicates that the dielectric breakdown occurred, and "o" indicates that the dielectric breakdown did not occur. As shown in Table 2, all were excellent in withstand voltage.

(Examples 14 to 20) A medium transport belt 10 was obtained in the same manner as in Example 1 except that the electrode protective layer 16 was formed with the components shown in Table 2. That is, the electrode protective layer 16 was formed to have a volume resistance of 3.5 × 10 ¹⁰ Ω in Example 14.
Epoxy resin having a cm, a dielectric constant of 5, and a water absorption of 0.9 (a mixture of bisphenol A type epoxy resin Epicoat 1001 and novolak type phenolic resin PSM-4327 (Gunei Chemical Industry Co., Ltd.) 450 to 100), Examples In the case of No. 15, the volume resistivity is 8.0 × 10 ¹² Ω · cm, the dielectric constant is 4.5,
Epoxy resin having a water absorption of 0.8 (Bisphenol A type epoxy resin Epicoat 1001 (Yukashoku Epoxy Co., Ltd.)), cresol novolak type epoxy resin 180
S65 (Yukaka Epoxy Co., Ltd.) and novolak type phenol resin PSM-4327 (Gunei Chemical Industry Co., Ltd.)
In Example 16, the volume resistivity was 1.4 × 10 ¹⁴ Ω · cm, the dielectric constant was 3.5, and the water absorption was 0.1.
Epoxy resin No. 7 (a mixture of cresol novolak type epoxy resin 180S65 (Yukaka Epoxy Co., Ltd.) and novolak type phenol resin PSM-4327 (Gunei Chemical Industry Co., Ltd.) at a ratio of 200 to 100), which was carried out in Example 17 10 v of carbon black to the epoxy resin of Example 16
ol%, and in Example 18, 20 vol% of conductive titanium oxide was added to the epoxy resin of Example 16.
In Example 19, 20 vol% of an antistatic agent was added to the epoxy resin of Example 16, and in Example 20, Example 16 was used.
Formed by adding 30 vol% of barium titanate to the epoxy resin. The volume resistivity and the dielectric constant of the obtained electrode protection layer 16 were as shown in Table 2. Then, in the same manner as in Examples 7 to 13, the NN adsorption force of paper 40 and HH
The adsorption power and the withstand voltage were measured. As shown in the results in Table 2, the paper 40 was very excellent in NN adsorption power, excellent in HH adsorption power, and also excellent in withstand voltage.

[0085]

[Table 2]

(Examples 21 to 34) A medium transport belt 10 was obtained in the same manner as in Example 1 except that the electrode protective layer 16 was formed of the components shown in Table 3. That is, the electrode protective layer 16 was formed to have a volume resistance of 1.0 × 10 ¹⁸ Ω in Example 21.
Cm, a dielectric constant of 2.1, and a water absorption of 0.03, obtained by adding 30 vol% of barium titanate to a PFA resin (Aflon PFA (Asahi Glass Co., Ltd.)); Barium titanate is 30 vol% in PVDF resin (KF Polymer # 1000 (Kureha Chemical Industry Co., Ltd.)) having ¹⁵ Ω · cm, dielectric constant of 11.0 and water absorption of 0.3.
In addition, in Example 23, the volume resistance value was 3.4 × 10 ^14.
Soft fluororesin (Cefralsoft G150F200 (Central Glass Co., Ltd.)) having Ω · cm, dielectric constant of 6.4 and water absorption of 0.04. In Example 24, the volume resistivity was 2.5 × 10
A mixture of a soft fluororesin and a urethane resin having a resistance of ¹² Ω · cm, a dielectric constant of 6.8 and a water absorption of 0.5 (Sefuralsoft G150
F200 (Central Glass Co., Ltd.) and Miractran 22
M (mixture of 50: 100 of Nippon Polyurethane Co., Ltd.), in Example 25, 30 vol% of barium titanate was added to a soft fluororesin, and in Example 26, the volume resistivity was 5.0 × 10 ¹³ Ω · cm. , Dielectric constant 5.9, water absorption rate 0.
No. 1 fluorine elastomer (Daiel T-530 (Daikin Industries, Ltd.)). In Example 27, the volume resistance value was 1.2 × 1.
PVD resin (Tedlar TST20SG4 (DuPont)) having 0 ¹⁴ Ω · cm, a dielectric constant of 6.5, and a water absorption of 0.5;
In Example 28, a PVC resin having a volume resistivity of 1.5 × 10 ¹³ Ω · cm, a dielectric constant of 4.0 and a water absorption of 0.4 (Smirit S) was used.
X-8G (Sumitomo Chemical Industries, Ltd.)), and in Example 29, a TPO resin having a volume resistivity of 1.0 × 10 ¹⁸ Ω · cm, a dielectric constant of 2.6, and a water absorption of 0.1 (Milastomer 5030N (Mitsui Chemicals, Inc.) Co., Ltd.) to which 30 vol% of barium titanate was added. In Example 30, the volume resistivity was 1.0 × 10 ¹⁸ Ω ·
cm, a dielectric constant of 2.5 and a water absorption of 0.1 (TPX resin)
X-RT18 (Mitsui Chemicals) with 30 vol% of barium titanate added. In Example 31, the volume resistivity was 1.0 × 10 ¹⁷ Ω · cm, the dielectric constant was 3.1, and the water absorption was 0.3.
Obtained by adding 30 vol% of barium titanate to a methacrylic resin (SUMIPEX-BLO-6 (Sumitomo Chemical Co., Ltd.)). In Example 32, the volume resistivity was 1.0 × 10 ¹⁷ Ω.
Cm, a dielectric constant of 3.2, and a water absorption of 0.3, obtained by adding 30 vol% of barium titanate to an acrylic silicone resin (Kaneka Zemrak (Kanebuchi Chemical Industry Co., Ltd.)); 0.0 × 10 ¹⁵ Ω · c
m, a dielectric constant of 3.4 and a water absorption of 0.2 (K
E1254 (Shin-Etsu Chemical Co., Ltd.) added with 30 vol% of barium titanate. In Example 34, the volume resistivity was 1.1 × 10 ¹⁶ Ω · cm, the dielectric constant was 3.0, and the water absorption was 0.1.
1 PEEK resin (Sumiploy K CK4600 (Sumitomo Chemical Co., Ltd.)) containing 30 vol% of barium titanate
Formed with the additions. The volume resistivity and the dielectric constant of the obtained electrode protective layer 16 were as shown in Table 3. Then, in the same manner as in Examples 7 to 13, the NN adsorption power, the HH adsorption power, and the withstand voltage of the paper 40 were measured. As shown in Table 3, the NN adsorbing power of the paper 40 was very excellent, and the paper 40 was also excellent in HH adsorbing power and withstand voltage.

[0087]

[Table 3]

The evaluation of ink resistance of the medium transport belt was performed as follows. An ink jet ink (cyan, magenta, yellow, black) is dropped on the electrode protection layer 4,
The electrode protection layer 16 was wiped with wet paper and the appearance was observed.
In Table 3, "x" indicates that the ink could not be wiped off, and "o" indicates that the ink could be wiped off. As shown in Table 3, all were excellent in ink resistance.

Example 35 As shown in FIGS. 1 and 2, a non-thermoplastic polyimide film (12) having a thickness of 50 μm was coated with an epoxy silver paste to form an electrode having a width of 10 mm, a distance between electrodes of 3 mm and a thickness of 10 μm. An electrode pattern 14 was formed. The same amide resin as in Example 8 was applied on this electrode pattern 14 to form an electrode protection layer 16 having a thickness of 37.5 μm. On the electrode protection layer 16, a volume resistance value of 1.0 × 10 ¹⁸ Ω · cm, a dielectric constant of 2.1, and a water absorption of 0.1.
An outer layer 20 having a thickness of 12.5 μm was formed of a composite resin obtained by adding 30 vol% of barium titanate to PFA resin No. 03 (Aflon PFA (Asahi Glass Co., Ltd.)).
This film (10) was joined in a belt shape to obtain a medium transport belt 10. Then, in the same manner as in Examples 21 to 34, the NN adsorption power, the HH adsorption power, the withstand voltage, and the ink resistance of the paper 40 were measured. Table 4 shows the results.
The NN adsorption power was very excellent, and the HH adsorption power, withstand voltage, and ink resistance were also excellent.

[0090]

[Table 4]

(Examples 36 to 41) A medium transport belt 10 was obtained in the same manner as in Example 35, except that the electrode protective layer 16 and the outer peripheral layer 20 were formed of the components shown in Table 4. That is, the outer peripheral layer 20 is formed of a PVDF resin in Example 36, a soft fluororesin in Example 37, a PVF resin in Example 38, a TPO in Example 39, a methacrylic resin in Example 40, and a silicone resin in Example 41. did. In the same manner as in Example 35, the attraction force of the paper 40 was measured. As shown in Table 4, the results were excellent in the NN adsorption force of the paper 40, and excellent in HH adsorption force, withstand voltage and ink resistance.

Example 42 Using a non-thermoplastic polyimide film (12) having a thickness of 50 μm and an epoxy-based silver paste, as shown in FIGS. 1 and 2, an electrode having a width of 10 mm, a distance between the electrodes of 3 mm and a thickness of 10 μm was used. An electrode pattern 14 was formed. The same epoxy resin as in Example 15 was applied on this electrode pattern 14 to form an electrode protection layer 1 having a thickness of 37.5 μm.
6 was formed. PFA is further applied on the electrode protection layer 16.
An outer peripheral layer 20 having a resin thickness of 12.5 μm was formed. Thereafter, the film (10) was joined in a belt shape to obtain a medium transport belt 10. Then, in the same manner as in Examples 21 to 34, the NN adsorption force, the HH adsorption force, the withstand voltage,
The ink resistance was measured. The results are shown in Table 4,
The paper 40 was very excellent in NN adsorption power, HH adsorption power, withstand voltage and ink resistance.

(Examples 43 to 48) A medium transport belt 10 was obtained in the same manner as in Example 42 except that the outer peripheral layer 20 was formed of the components shown in Table 4. That is, the outer peripheral layer 20
In Example 43, PVDF resin, Example 44, soft fluororesin, Example 45, PVF resin, Example 46, TPO, Example 47, methacrylic resin, Example 48
Then, it was formed of silicone resin. In the same manner as in Example 35, the attraction force of the paper 40 was measured. As shown in Table 4, the results were excellent in the NN adsorption force of the paper 40, and excellent in HH adsorption force, withstand voltage and ink resistance.

(Examples 49 to 55) A medium transport belt 10 was obtained in the same manner as in Example 35 except that the electrode protective layer 16 and the outer peripheral layer 20 were formed of the components shown in Table 4. That is, in Example 49, the outer peripheral layer 20 was obtained by adding 30 vol% of barium titanate to PVDF resin.
In the soft fluororesin, 30 vol% of barium titanate
In Example 51, 30 vol% of barium titanate was added to PVF resin, and in Example 52, TPO was added.
In Example 53, 30 vol% of barium titanate was added to methacrylic resin.
In Example 54, it was formed by adding 30 vol% of barium titanate to a silicone resin, and in Example 55, it was formed by adding 30 vol% of barium titanate to a PEEK resin. In the same manner as in Example 35, the attraction force of the paper 40 was measured. As shown in Table 5, the results were as follows.
The NN adsorption power was very excellent, and the HH adsorption power, withstand voltage, and ink resistance were also excellent.

[0095]

[Table 5]

(Examples 56 to 62) A medium transport belt 10 was obtained in the same manner as in Example 42 except that the electrode protective layer 16 and the outer peripheral layer 20 were formed of the components shown in Table 4. That is, in Examples 56 to 58, the electrode protective layer 16 is the same epoxy resin as in Example 42, and in Examples 59 to 62.
Then, using the same amide resin as in Example 35,
In Example 56, 30 vol% of barium titanate was added to a PVDF resin, in Example 57, 30 vol% of barium titanate was added to a soft fluororesin, and in Example 58, 30 vol% of barium titanate was added to a PVF resin.
%, In Example 59, 30 vol% of barium titanate was added to TPO, in Example 60, 30 vol% of barium titanate was added to methacrylic resin,
In Example 61, the barium titanate was added to the silicone resin 3 times.
In Example 62, it was formed by adding 30 vol% of barium titanate to a silicone resin. For these belts, the attraction force of the paper 40 was measured in the same manner. As shown in Table 5, the results are as follows.
It was very excellent in adsorption power, and excellent in HH adsorption power, withstand voltage and ink resistance.

Example 63 As shown in FIG. 5, the medium transport belt 10 manufactured according to Example 1 has the same composition as the outer electrode protection layer 16 on the inner surface, as shown in FIG. The resin layer 26 was formed with the same thickness to obtain a medium transport belt 28. Then, in the same manner as in the first embodiment, the paper 40
Was measured for adsorption power. As a result, the suction force of the paper 40 is 1
A belt weighing 0.5 kg and having no warpage in the width direction was obtained.

[0098]

In the medium transport belt according to the present invention, since the electrode protective layer has a predetermined volume resistivity and dielectric constant,
An excellent electrostatic attraction force can be obtained, and paper and OHP can be transported while being sufficiently absorbed.

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 having excellent dielectric breakdown resistance due to water absorption can be obtained. Can be provided.

Further, by forming the resin of the electrode protection layer into a resin having ink resistance or providing an outer layer having ink resistance on the outer periphery of the electrode protection layer, a 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.

[0101]

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

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

FIG. 7 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. 8 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. 9 is an explanatory plan view of a main part showing a method of testing the suction force of the medium transport belt according to the present invention.

[Explanation of symbols]

 10, 24, 28, 30, 38: medium transport belt 12: polymeric tubular material 14, 34: electrode pattern 16, 36: electrode protective layer 18: polymeric material film 20: outer peripheral layer 22, 26, 32: resin Layer 40: Paper

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) G03G 15/00 510 G03G 15/00 510 4J043 // C08G 73/10 C08G 73/10 C08K 3/00 C08K 3 / 00 C08L 27/12 C08L 27/12 79/08 79/08 Z F term (reference) 2H072 CA07 CB07 CB08 HB05 JA03 3F049 DA05 DA19 FC21 FC23 LA02 LB03 3F101 CA12 CA17 CC30 4F100 AK01A AK01C AK01D AK01C AK11C AK11C AK11C AK16C AK17C AK25C AK27C AK33C AK41C AK42C AK43C AK45C AK46C AK49A AK49C AK51C AK52C AK53C AK54C AK55C AK56C AK57C AN02C AS00C BA03 BA04 BA05 BA10A BA10C BA10D BA10E BA13 CA00C CA21C CA30C DA11 GB51 HB06B JA05A JA05C JB16A JB16C JD15C JD15D JG01B JG03 JG04C JG04D JG05C JG05D JK07A JL00C YY00A YY00C YY00D 4J002 AB011 AC001 BB011 BB241 BB271 BC031 BC081 BC121 BD0 31 BD101 BD121 BD181 BE021 BE041 BE061 BF011 BG001 BH021 BJ001 BN071 BN101 BN121 BN141 CB001 CC031 CC121 CC161 CC181 CC191 CD001 CE001 CF001 CG001 CH001 CK021 CL001 CM041 CN021 CN031 CP031 DA016 DA026 DA86 FA016DE04 DE066 FA066 FA136 QB26 QB31 RA35 SA06 SA43 SA44 SA71 SB01 SB02 TA22 TB01 TB02 UA122 UA131 UA132 UA141 UA151 UA161 UA661 UA672 UB011 UB021 UB062 UB122 UB131 UB132 UB141 UB152 UB172 UB281 UB301 UB302 ZUBA UB402 VA022 VA022 VA16

Claims (18)

[Claims] 1. A medium transport belt in which an electrode pattern having conductivity is formed on the outer peripheral surface of a tubular article formed of a polymer material, and an electrode protection layer is formed on the electrode pattern. The electrode protective layer is a resin having a volume resistivity of 10 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 or more, or a composite resin obtained by mixing an additive with the resin. Media transport belt. 2. The polymer material has a tensile modulus of 200 k.
media transport belt according to claim 1, characterized in that the g / mm ² or more polymeric materials. 3. The medium transport belt according to claim 2, wherein the polymer material having a tensile modulus of 200 kg / mm ² or more is a non-thermoplastic polyimide resin or a thermoplastic polyimide resin. 4. The polymer material has a glass transition temperature of 15
2. A polymer material having a temperature of 0 ° C. or higher.
4. The medium transport belt according to any one of items 1 to 3. 5. The medium transport belt according to claim 1, wherein the additive is one of a conductive additive and a high dielectric constant additive, or both of them. . 6. The medium transport belt according to claim 1, wherein the resin is a polyimide resin. 7. The medium transport belt according to claim 6, wherein the polyimide resin is a thermoplastic polyimide resin having a glass transition temperature of 150 ° C. or higher. 8. The medium transport belt according to claim 1, wherein the resin has a water absorption of 1% or less. 9. The resin having a water absorption of 1% or less, the 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, Polyacetal resin, polyvinylidene chloride resin, polyvinyl chloride resin, amide resin, urethane resin, nitrile resin,
At least one resin selected from the group consisting of phenolic resins, urea resins, melamine resins, guanamine resins, vinyl ester resins, epoxy resins, furan resins, and fluororesins, or chlorosulfonates having a water absorption of 1% or less. Polyethylene rubber, olefin resin,
Styrene resin, acrylic resin, silicone resin,
Aromatic resin, polyacetal resin, polyvinylidene chloride resin, polyvinyl chloride resin, amide resin, urethane resin, nitrile resin, phenol resin, urea resin, melamine resin, guanamine resin, vinyl ester resin, epoxy The medium transport belt according to claim 8, wherein the mixed material contains at least 30 vol% of at least one resin selected from the group consisting of a resin, a furan resin, and a fluorine-based resin. 10. The medium transport belt according to claim 8, wherein the resin having a water absorption of 1% or less is an ink-resistant resin. 11. The method according to claim 11, wherein the ink-resistant resin is —CH ₂ —C
R ₁ R ₂ — (where R ₁ or R ₂ is H, CH ₃ , P
h, or COOX, where X is an organic group), an olefin resin having a structure of styrene, a styrene resin, or an acrylic resin, or an olefin resin having a structure of —CH ₂ —CR ₁ R ₂ —, styrene The medium transport belt according to claim 10, wherein the medium transport belt is a resin containing 30 vol% or more of an acrylic resin or an acrylic resin. 12. The ink-resistant resin according to claim 1, wherein the polyacetal, polyetheretherketone, polyetherketone, polyphenyleneether, polyphenylenesulfide, polysulfone, polyethersulfone, polybutyleneterephthalate, polyethyleneterephthalate, polyethylenenaphthalate, polycarbonate, polycarbonate The medium transport belt according to claim 10, comprising at least one resin selected from the group consisting of arylate and liquid crystal polyester. 13. The method according to claim 13, wherein the ink-resistant resin is -CF._Two-C
FR_Three-(Where R _ThreeIs H, Cl or F),
-CH_Two-CF_Two-Or -CH_TwoStructure of -CHF-
Fluorinated resin having -CF or -CF_Two-CFR_Three-(This
Where R_ThreeIs H, Cl or F), -CH_Two−
CF_Two-Or -CH_TwoHaving a structure of -CHF-
It is a resin containing 30 vol% or more of nitrogen-based resin.
The medium transport belt according to claim 10, wherein: 14. The ink-resistant resin according to claim 14, wherein -CH ₂ -C
Media transport according to claim 10, characterized in that the resin containing more than 30 vol% of a polyvinylidene chloride-based resin having a structure of - Cl ₂ - polyvinylidene chloride resins or -CH ₂ -CCl ₂ having the structure belt. 15. The ink-resistant resin according to claim 15, wherein -CH ₂ -C
Polyvinyl chloride resin having an HCl- structure or-
Media transport belt according to claim 10, characterized in that the polyvinyl chloride resin having a structure of CH ₂ -CHCl- a resin containing more than 30 vol%. 16. A water absorption rate of 1 on the outer peripheral surface of the electrode protection layer.
The medium transport belt according to any one of claims 1 to 15, wherein an outer peripheral layer made of a resin of not more than% is formed. 17. The method according to claim 17, wherein the outer peripheral layer has a volume resistivity of 10 ^9.
Media transport belt according to claim 16, 10 a ¹⁵ Omega · cm and a dielectric constant, characterized in that at least 3.0. 18. The medium transport belt according to claim 1, wherein a resin layer having the same composition as the electrode protective layer or the outer peripheral layer is formed on an inner peripheral surface of the tubular member. .