JP2000143028A - Medium conveyor belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve conveying performance, adhesive strength and heat resistance by comprising a tubular member formed of polyimide resin, conductive electrode patterns and an electrode protective layer with specific volume resistivity value and a specific dielectric constant, and having the specific quantity of a surface treatment agent between resin and the protective layer. SOLUTION: In a medium conveyor belt 10, conductive electrode patterns 14 are formed on the outer peripheral surface of a tubular member 12 formed of polyimide resin, and a surface treatment agent and/or compound 15 produced from the surface treatment agent is formed at 0.0001-3 g/m2 on the formed face. An electrode protective layer 16 with volume resistivity value of 109-1015 Ω.cm and a dielectric constant of 3.0-50.0 is further formed thereon. The tubular member 12 is formed of a combination of a film formed of a non-thermoplastic polyimide resin and thermoplastic polyimide resin or its film. The electrode patterns 14 are formed by printing and etching conductive paste of silver, copper or the like on the surface of the tubular member 12, and thermoplastic resin, elastomer or the like is used as resin of the electrode protective layer 16. With this constitution, a printing medium can be strongly attracted, and interface adhesive strength, heat resistance and the like can be improved.

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 Belt used for transporting paper and OHP film used in electrophotographic devices such as copiers, laser beam printers and facsimile machines, and transport of paper and OHP film in inkjet printers and bubble jet printers. For belts used for drying and drying, etc., paper and OHP film can be transported at high speed, so that they can strongly absorb media for printing, etc. 2. Description of the Related Art There is known a medium transport belt provided with a belt.

In this medium transport belt, a conductive electrode pattern is formed on the outer peripheral surface of a tubular article formed of a polyimide resin, and a volume resistance value of 10 ¹⁰ to 10 ¹⁵ Ω · An electrode protection layer having a dielectric constant of 3.0 to 30.0 cm is formed, and paper can be electrostatically attracted by applying a voltage to the electrode pattern.

Further, in such a medium transport belt, an alkali-resistant resin layer is formed on the outer peripheral surface of the electrode protective layer, and in the medium transport belt, the volume resistance value of the alkali-resistant resin layer is 10 ¹⁰ -10
^A composite resin layer having a resistivity of ¹⁵ Ω · cm and a dielectric constant of 3.0 to 30.0 may be formed. In such a medium transport belt, the electrode protection layer may be formed by adding a conductive powder and / or It is a composite resin layer obtained by mixing high dielectric constant powder. Further, in such a medium transport belt, the electrode protective layer is formed by mixing conductive powder and / or high dielectric constant powder with polyvinyl fluoride resin. By forming the composite resin layer thus formed, a medium transport belt having excellent heat resistance and chemical resistance can be obtained.

[0005]

In order to convey a medium such as paper or OHP at a high speed, it is necessary to increase the rotation speed of the belt. By increasing the rotation speed, it is possible to form a tubular object, an electrode pattern and an electrode protection layer. It was necessary to increase the adhesive strength between the interfaces so that no delamination occurred at each interface.

[0006] In order to increase the speed of a printer or the like, the present inventors can strongly adsorb a medium for printing or the like, and can reduce the interference between each constituent material such as a tubular object, an electrode pattern, and an electrode protection layer. Has excellent interfacial adhesion,
Furthermore, in order to obtain a medium transport belt with heat resistance, electrical insulation, and appearance in accordance with the usage conditions, etc., after extensive investigation and research, an electrode pattern is formed on a tubular object, and a voltage is applied. In this way, the paper is electrostatically attracted, and by specifying the configuration and material properties of the belt, the paper transportability and the interfacial adhesion between the constituent materials, heat resistance,
The inventor has conceived a medium transport belt according to the present invention which has excellent electrical insulation properties and appearance.

[0007]

A tubular article molded from a polyimide resin, a conductive electrode pattern, a volume resistivity of 10 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.
In the belt having the electrode protective layer of 0 to 50.0, between the polyimide resin and the electrode protective layer, the surface treatment agent and / or the compound generated from the surface treatment agent is 0.0001 to
A medium transport belt characterized by being present at 3 g / m ² .

[0008]

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

As shown in FIGS. 1, 2 and 3, the medium transport belts 10 and 11 according to the present invention have an electrode pattern 14 having conductivity on the outer peripheral surface of a tubular material 12 formed of a polyimide resin. While being formed, a surface treatment agent and / or a compound 15 generated from the surface treatment agent are formed on the electrode pattern formation surface in an amount of 0.0001 to 3 g / m ² , and further have a volume resistance value of 10 ⁹ to 10 ¹⁵ Ω · cm. And an electrode protection layer 16 having a dielectric constant of 3.0 to 50.0 is formed.

As shown in FIGS. 4 and 5, in the medium transport belts 17 and 18 according to the present invention, a surface treatment agent and / or the surface treatment agent is provided on the outer peripheral surface of the tubular material 12 formed of polyimide resin. Is formed at 0.00001 to 3 g / m ² , an electrode pattern 14 having conductivity is formed on the surface on which the compound is formed, and a volume resistance value of 1 is formed on the surface on which the electrode pattern is formed.
0 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 to 5
The electrode protection layer 16 of 0.0 is formed.

As shown in FIGS. 6 and 7, in the medium transport belts 19 and 20 according to the present invention, a conductive electrode pattern 14 is formed on the outer peripheral surface of the tubular member 12 formed of polyimide resin. And a volume resistance value of 10 ⁹ to 10 ¹⁵ Ω on the electrode pattern formation surface.
An electrode protection layer 16 having a dielectric constant of 3.0 to 50.0 cm and a surface treatment agent is provided on each interface of the tubular object 12, the electrode pattern 14, and the electrode protection layer 16. Or 0.0015 of the compound 15 generated from the surface treatment agent
1 g to 3 g / m ² .

The tubular member 12 of the medium transport belt of the present invention is a combination of a film made of a non-thermoplastic polyimide resin and a thermoplastic polyimide resin or its film,
Alternatively, it is formed of one or two or more thermoplastic polyimide resins or a film thereof, or a non-thermoplastic polyimide resin. That is, the method of forming the tubular material 12 will be described more specifically. A method of joining both ends of a non-thermoplastic (thermosetting) polyimide film with a thermoplastic polyimide resin to form a tubular material, A method of forming a tube by heating and joining both ends of the film, or laminating a non-thermoplastic polyimide film and a thermoplastic polyimide film by shifting their butt end positions and forming a tube, and heat joining Then, a method of forming a tube can be used.
Further, a method of directly molding a non-thermoplastic polyimide resin or a thermoplastic polyimide resin into a tubular shape using a mold or the like can be used. The tubular material 12 may be molded by any method, and there is no particular limitation.

The thermoplastic polyimide resin used has a glass transition temperature Tg of at least 150 ° C.
It is preferable to select one having a temperature of 30 ° C. or higher. The media transport belt is a belt used for transporting paper and OHP film in electrophotographic devices such as copiers, laser beam printers and facsimile machines, or transporting and drying paper and OHP film in inkjet printers and bubble jet printers. It is a belt used for such purposes. 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 polyimide film used for the heat-resistant resin belt of the present invention has a glass transition temperature Tg of 150 ° C. or more, more preferably 230 ° C.
A material having a temperature of at least ℃ is used, and a material having heat resistance in relation to the conditions of use of the belt is used. As a polyimide film having such heat resistance, a thermoplastic polyimide film is particularly preferable. The thermoplastic polyimide film is different from a conventional thermosetting polyimide film in that it has heat resistance, has melt fluidity in a predetermined high temperature range, and is excellent in workability. Further, the adhesiveness of the joint portion in the heat-resistant resin belt of the present invention is superior to the thermosetting polyimide film. The chemical structure of the thermoplastic polyimide according to the present invention is represented by the general formula (1):

[0015]

Embedded image Where m, n is equal to each repeating unit mole fraction of the polymer chain, m ranges from about 0.1 to about 0.9, and n ranges from about 0.9 to about 0.1. However, the ratio of m to n is 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 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).

[0016]

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

[0017]

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, as the diamine, X and Y in the general formula (1) are monomers which impart thermoplasticity.

[0018]

Embedded image (In the formula, R ₁ represents a divalent organic group.)

[0019]

Embedded image Is preferably 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. It is needless to say that this embodiment is an example and is not limited to this.

The thermoplastic polyimide resin used for the medium transport belt is not limited to the above-mentioned structural formula, but is preferable. As the thermoplastic film, for example, a film composed of only thermoplastic polyimide may be used, or a film composed of a mixture of thermoplastic polyimide and additives may be used.

The non-thermoplastic (thermosetting) polyimide film used in the medium transport belt of the present invention is represented by the following general formula (2).

[0023]

Embedded image (However, R ₁ is

[0024]

Embedded image R ₂ is a hydrogen atom or 1
M and n are integers, and m / n = 0.
It takes a value from 1 to 100. ) Can be used, but this is only an example.

The non-thermoplastic polyimide film contains all resins represented by thermosetting polyimide resin or reaction-curing polyimide resin. 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.

In the medium transport belt of the present invention, the tubular article 1
2, a predetermined electrode pattern 14 is formed on the surface of
The ends of the electrode patterns 14 are extended alternately so that a voltage can be applied. Electrode pattern 1
4 is a method in which a conductive paste made of silver, copper, aluminum, carbon, or the like is screen-printed on the surface of the tubular object 12 or a metal foil or a thin metal film of aluminum, copper, or the like is adhered to the surface of the tubular object 12. Or by etching to form a predetermined electrode pattern 14, or by depositing a metal such as aluminum through a mask on which the predetermined electrode pattern 14 is formed to form the predetermined electrode pattern 14. It is composed. The electrode pattern 14 is not limited to the illustrated shape. For example, the electrode pattern 14 may be formed in a comb shape and a pattern in which the comb teeth are engaged. The thickness of the electrode pattern 14 is preferably 2 to 30 μm, and more preferably 5 to 20 μm in consideration of the unevenness of the surface due to the electrode pattern. Further, the line width and the pitch of the electrode pattern 14 are arbitrary and can be set variously.

In the medium transport belt of the present invention, a static electricity is generated on the outer peripheral surface of the tubular object 12 on which the electrode pattern 14 is formed by applying the electrode pattern 14 to the paper so that paper is applied on the surface of the electrode protective layer 16. When adsorbing, the volume resistivity is 10 ⁹ to 10 ¹⁵ Ω · cm and the dielectric constant is 3.
An electrode protection layer 16 of 0 to 50.0 is formed.
In particular, the volume resistance value of the electrode protection layer 16 is 10 ⁹ to 10
¹⁵ Ω · cm, preferably 10 ¹⁰ to 10 ¹⁴ Ω · cm
And the dielectric constant is 3.0 to 30.0, preferably 5.0 to 20.0. Volume resistance value is 10 ⁹ Ω
When the diameter is less than 10 cm, the insulation between the adjacent electrode patterns 14 is insufficient, and a leak current flows, which is not preferable. Further, when the volume resistance value exceeds 10 ¹⁵ Ω · cm, the residual charge remains long even after the voltage applied to the electrode pattern 14 is removed, and it is not preferable because the paper remains adsorbed. 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 paper becomes insufficient. If the dielectric constant exceeds 30.0, the resin and the high dielectric constant powder are combined. The material is not preferable because the content of the high dielectric constant powder increases and the mechanical strength is greatly reduced. If the electrode protective layer 16 has the above-mentioned predetermined volume resistance and dielectric constant, a resin alone or a mixture of a conductive powder or a high dielectric constant powder as appropriate and mixed with the resin may be used.

Here, examples of the resin of the electrode protective layer 16 include thermoplastic resins, elastomers, thermosetting resins, rubbers, etc., such as polyethylene, ethylene-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, ethylene vinyl copolymer. Alcohol copolymer, polypropylene, vinyl chloride resin, chlorinated vinyl chloride resin, polystyrene, AS resin, ABS resin, methyl methacrylate resin, ethylene methacrylic acid copolymer, polyvinyl alcohol, cellulose, nylon resin, polyacetal, polycarbonate, modified Polyphenylene ether, polybutylene terephthalate, polyethylene terephthalate, ultra-high molecular weight polyethylene, polymethylpentene, syndiotactic polystyrene, polysulfone, polyethersulfone, polyphthalamide, polyphenylene Sulfide, polycyclohexylene dimethylene terephthalate, polyarylate, polyetherimide, polyetheretherketone, polyimide, liquid crystal polymer, fluororesin, styrene-based elastomer, olefin-based elastomer, polyurethane-based elastomer, polyester-based elastomer, PVC-based elastomer, polyamide -Based elastomer, polyester-based elastomer, fluororesin-based elastomer, phenolic resin, urea resin, melamine resin, unsaturated polyester resin, diallyl phthalate resin, epoxy resin, silicone resin, natural rubber, isoprene, styrene butadiene rubber, butadiene rubber, chloroprene rubber , Isobutylene / isoprene rubber, nitrile butadiene rubber, ethylene propylene rubber, chlorinated polyethylene rubber , Chlorosulfonated polyethylene rubber, acryl rubber, urethane rubber, silicone rubber, fluorine rubber, epichlorohydrin rubber and the like. Of these, when the resin alone requires heat resistance, the thermal decomposition temperature is 2
A resin having a temperature of 00 ° C or higher is preferable, and a resin having a temperature of 300 ° C or higher is more preferable. When heat resistance and chemical resistance are required, modified polyphenylene ether, polyether ether ketone, polysulfone, polyethersulfone, polyphenylene sulfide, ultra high molecular weight polyethylene, polymethylpentene, fluororesin, olefin elastomer,
It is preferable to use a fluororesin-based elastomer, a fluorine-based rubber, an olefin-based rubber, etc., and a fluororesin, a fluororesin-based elastomer, a fluororesin composed of a fluororubber, etc., ultra-high molecular weight polyethylene, polymethylpentene, an olefin-based elastomer, an olefin It is more preferable to use an olefin resin composed of a rubber or the like.

The conductive powder used for adjusting the volume resistance value of the electrode protective layer 16 includes metal powder, metal flake, metal fiber, metal long fiber, carbon black, carbon fiber, conductive whisker, polyethylene Examples thereof include glycol-based graphite and graphite intercalation compounds, and at least one or more conductive powders selected from these according to the purpose are used. The amount of the conductive powder to be added is appropriately set depending on the intended volume resistance of the electrode protective layer 16, but is usually preferably 2 to 30% by weight, and more preferably 3 to 20% by weight. The size of the conductive powder is appropriately selected according to the purpose, but preferably has an average particle diameter of usually 0.01 to 50 μm, and more preferably has an average particle diameter of 0.01 to 10 μm.

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, and zirconate titanate. More preferably, an inorganic powder having a dielectric constant of 500 or more is used, and examples thereof include barium titanate and lead zirconate titanate. The shape of the high dielectric constant powder is not particularly limited, but may be, for example, a sphere, a flake, a 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 diameter is 0.01 to 50.
μm, preferably from 0.01 to
20 μm is preferred. In the case of a whisker, the length is 1 to 5
Those having a diameter of 0 μm and 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 depending on the desired dielectric constant of the electrode protective layer 16, but is usually preferably 5 to 50% by weight, more preferably 10 to 30% by weight.

Further, the electrode protective layer 16 preferably has a low water absorption, and usually has a water absorption of 2% or less. In particular, in order to prevent a leak current under a high temperature and a high humidity and maintain a strong adsorption force, it is preferable that the water absorption of the electrode protection layer 16 is low. For example, when the adsorbing power at 30 ° C. and 80% RH is required in the use environment, the water absorption is preferably 1% or less,
More preferably, it is better to be 0.5% or less.

Further, the surface treating agent and / or the compound 15 derived from the surface treating agent in the medium transport belt of the present invention.
Among them, silane coupling agents as surface treatment agents,
Examples include titanate-based coupling agents, aluminum-based coupling agents, organic amines, amino acids, and the like. At least one or more surface treatment agents selected from these according to the purpose are used. Is appropriately set according to the type of the electrode protection layer 16. Examples of the compound generated from the surface treatment agent include a silane-based coupling agent, a titanate-based coupling agent, an aluminum-based coupling agent, an organic amine, a compound generated by coating and drying of an amino acid, and the like. different. The amount of the surface treatment agent and / or the compound 15 generated from the surface treatment agent is determined by the amount of the applied tubular article 12,
The surface treatment agent and / or the compound 1 generated from the surface treatment agent with respect to the unit surface area (excluding the cross-sectional area of the electrode pattern) of the layer formed of the electrode pattern 14 and the electrode protection layer 16
5 is represented by weight, preferably normally 0.0001~3g / m ^2, more preferably 0.002~2.5g / m ^2, more preferably 0.01 to 2.0 g / m ^2. When the coating amount is less than 0.0001 g / m ² ,
It is not preferable because the interfacial adhesive strength between the constituent materials of the electrode pattern 14 and the electrode protection layer 16 is reduced. On the other hand, when the coating amount exceeds 3 g / m ² , the insulating property between the adjacent electrode patterns 14 is insufficient and a leak current flows, so that the adsorbing power of the paper is reduced and the surface treatment agent is excessively excessive. Is not preferable because the electrical insulation and the appearance of the electrode protection layer 16 deteriorate due to the decomposition.

Further, as shown in FIG.
Media transport belt 24 requires alkali resistance on the belt surface
In this case, the base resin of the electrode protection layer 16 is
Uses non-alkali resistant resin such as lamide or polyimide
If there is, a fluorine resin or an
Alkali-resistant resin layer 22 such as fin-based resin
It is preferable to form the resin layer 2 having alkali resistance.
2 has a volume resistance of 10 ⁹-10¹⁵Ω · cm and invite
It is preferable to form a resin layer having an electric conductivity of 3.0 to 50.0.
Is more preferable.

The example of the configuration of the medium transport belt 1 according to the present invention has been described above. Next, an example of a method of manufacturing the medium transport belt 1 will be described.

An example of a method for manufacturing the medium transport belt 10 shown in FIG. 2 will be described. A tubular material 12 made of a polyimide resin serving as a base is formed as a seamless belt by, for example, a casting method, and an electrode pattern 14 having conductivity is formed on the outer peripheral surface of the tubular material. Further, a surface treating agent is applied and dried on the surface on which the electrode pattern 14 is formed to form a layer of the surface treating agent and / or the compound 15 generated from the surface treating agent, and the electrode patterns 1 extending alternately on the outer peripheral surface thereof are formed.
The medium transport belt 10 is manufactured by laminating the electrode protection layer 16 with, for example, a hot roll or the like except for the end portion of No. 4.

An example of a method for manufacturing the medium transport belt 11 shown in FIG. 3 will be described. A surface treatment agent is applied and dried on one surface of the electrode protection layer 16 to form a layer of the surface treatment agent and / or the compound 15 generated from the surface treatment agent, and a conductive electrode pattern 16 is formed on the surface treatment surface. Further, the surface of the electrode pattern 14 of the electrode protection layer 16 is adhered by, for example, a hot roll or the like, except for the end portions of the electrode pattern 14 which alternately extend to the outer peripheral surface of the tubular body 12 made of a polyimide resin. It is manufactured.

An example of a method for manufacturing the medium transport belt 17 shown in FIG. 4 will be described. A surface treatment agent is applied to the outer peripheral surface of the tubular body 12 made of a polyimide resin and dried to form a layer of the surface treatment agent and / or the compound 15 generated from the surface treatment agent, and further, an electrode pattern 14 having conductivity is formed. The medium protective belt 16 is manufactured by attaching the electrode protection layer 16 to the electrode pattern forming surface by using, for example, a hot roll, except for the end portions of the electrode pattern 14 that alternately extend to the outer peripheral surface.

An example of a method for manufacturing the medium transport belt 18 shown in FIG. 5 will be described. An electrode pattern 14 having conductivity is formed on one surface of the electrode protection layer 16, a surface treatment agent is applied and dried on the surface on which the electrode pattern 14 is formed, and a layer of the surface treatment agent and / or a compound 15 resulting from the surface treatment agent is formed. I do. Further, the medium-conveying belt 18 is manufactured by bonding the surface-treated surface of the electrode protective layer to a surface-treated surface of the electrode protective layer except for the end portions of the electrode patterns 14 which extend alternately on the outer peripheral surface of the tubular member 12 made of a polyimide resin, for example. You do it.

An example of a method for manufacturing the medium transport belt 19 shown in FIG. 6 will be described. One surface of the electrode protective layer 16 is coated with a surface treatment agent and dried to form a layer of the surface treatment agent and / or the compound 15 generated from the surface treatment agent. Further, a surface treatment agent is also applied to the outer peripheral surface of the tubular article 12 made of a polyimide resin and dried, and the surface treatment agent and / or the compound 1 resulting from the surface treatment agent
5 and a conductive electrode pattern 1
4 is formed. On the surface on which the electrode pattern 14 is formed, a surface treatment surface of the electrode protection layer 16 is attached by, for example, a hot roll or the like, except for the end portion of the electrode pattern 14 which extends alternately to the outer peripheral surface thereof. It is manufactured.

Further, the medium transport belt 19 shown in FIG.
2 shows another example of the method for producing the same. A surface treatment agent is applied to the outer peripheral surface of the tubular material 12 made of a polyimide resin and dried to form a layer of the surface treatment agent and / or the compound 15 generated from the surface treatment agent. Furthermore, an electrode pattern 14 having conductivity is formed, and further, a surface treatment agent is applied to the outer peripheral surface thereof and dried,
Surface treatment agent and / or compound 1 generated from the surface treatment agent
5 layers are formed. Except for the end portions of the electrode patterns 14 that extend alternately on the outer peripheral surface, the electrode protection layer 16 is attached by, for example, a hot roll or the like to form a medium transport belt 19.
Is to manufacture.

An example of a method for manufacturing the medium transport belt 20 shown in FIG. 7 will be described. A surface treatment agent is applied and dried on one surface of the electrode protection layer 16 to form a layer of the surface treatment agent and / or the compound 15 generated from the surface treatment agent, and a conductive electrode pattern is formed on the surface treatment surface. A surface treatment agent is also applied to the outer peripheral surface of the tubular material 12 made of a polyimide resin and dried to form a layer of the surface treatment agent and / or the compound 15 generated from the surface treatment agent. Furthermore, the surface-treated surface of the tubular member 2 made of polyimide resin and the surface-treated surface of the electrode protection layer except for the end portions of the electrode patterns 3 which extend alternately are bonded to each other by, for example, a hot roll or the like.
Is to manufacture.

Further, another example of the method for manufacturing the medium transport belt shown in FIG. 7 will be described. A surface treatment agent is applied and dried on one surface of the electrode protective layer to form a layer of the surface treatment agent and / or a compound 15 generated from the surface treatment agent, and a conductive electrode pattern 14 is formed on the surface treatment surface. Further, the surface treatment agent is applied and dried to form a layer of the surface treatment agent and / or the compound 15 generated from the surface treatment agent, and the electrode patterns 14 alternately extending on the outer peripheral surface of the tubular body 12 made of polyimide resin.
Except for the end of the belt, the electrode pattern surface of the electrode protection layer is adhered to the medium transport belt 2 by, for example, a hot roll.
0 is manufactured.

Also, after a film is previously formed from a polyimide resin, both ends of the film are joined to form a belt to obtain a tubular material 12, and then the electrode pattern 14 surface treatment agent and / or the surface treatment The medium transport belts 10 and 11 and 17 and 18 and 19 and 20 may be manufactured by forming the compound 15 derived from the agent and the electrode protection layer 16. Alternatively, as shown in FIG. 8, after the electrode pattern 14, the surface treatment agent and / or the compound 15 resulting from the surface treatment agent are formed on the surface of the film 34 formed of the polyimide resin, the two-dot chain line is used. The electrode protection layer 16 may be formed, and then the both ends of the film 21 may be joined to form a belt to manufacture the medium transport belts 10 and 11 and 17 and 18 and 19 and 20.

In these production methods, the method for forming the surface treating agent and / or the compound 15 generated from the surface treating agent is as follows.
Apply the surface treating agent dissolved in the solvent or the surface treating agent to the object using a bar coater, a brush or a spray, or immerse the object in the surface treating agent dissolved in the solvent or the surface treating agent, and then dry. However, the present invention is not limited thereto.

In these manufacturing methods, the electrode protection layer 1
6, the resin is formed in a varnish form, and the varnish is applied on the electrode pattern 14 to form the electrode protection layer 16 or the electrode protection layer 16 is formed into a film in advance. There is a method of forming the electrode protection layer 16 by laminating the film on the electrode pattern 14. Examples of the laminating method include a thermocompression method using a hot press method or a hot roll method, but are not limited thereto.

These various production methods can be appropriately selected depending on the purpose of the obtained medium transport belt, and include a tubular member 12, a surface treating agent and / or a compound 15 generated from the surface treating agent, It is appropriately selected according to the material of the layer 16. Further, the manufacturing method is appropriately set in accordance with the structure of another medium transport belt described below.

The structure of the medium transport belt is not limited to that shown in FIGS. 1, 2, 3, 4, 5, 6, and 7, and for example, as shown in FIG. In the medium transport belt on which the pattern 14, the surface treatment agent and / or the compound 15 generated from the surface treatment agent, and the electrode protection layer 16 are formed, a top coat layer 22 for further protecting the electrode protection layer 16 may be formed. Top coat layer 2
As 2, for example, a resin layer such as the above-described alkali-resistant fluororesin can be used. The top coat layer 22 is preferably formed not only on the outer surface of the electrode protection layer 16 but also on the inner peripheral surface of the tubular member 12 as shown by a two-dot chain line in the figure. By using the same material as the top coat layer 22 and forming the resin layer 23 having substantially the same thickness on the inner peripheral surface of the tubular material 12, the obtained medium transport belt 24 has less warpage.

As shown in FIG. 10, in a medium transport belt in which an electrode pattern 14, a surface treating agent and / or a compound 15 generated from the surface treating agent, and an electrode protective layer 16 are formed on the outer peripheral surface of the tubular material 12, It is also preferable that the medium transport belt 28 is formed by providing a resin layer 26 made of the same material as the electrode protection layer 16 with substantially the same thickness on the inner peripheral surface side of the tubular object 12. Except for the electrode pattern 14, by making the sectional structure substantially symmetrical, it is possible to prevent the medium transport belt 28 from warping.

Further, as shown in FIG.
An electrode pattern 14, a surface treatment agent and / or a compound 15 derived from the surface treatment agent, and an electrode protection layer 16 are formed on the outer peripheral surface of the tubular member 12, and the inner peripheral surface side of the tubular member 12 is made of the same material as the electrode protective layer 16. In the medium transport belt provided with the resin layer 26 having substantially the same thickness, the top coat layer 2 for protecting the electrode protective layer 16 on the surface of the electrode protective layer 6 is further provided.
2, the medium transport bell 29 may be formed. It is also preferable that a resin layer 32 made of the same material as that of the top coat 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 29.

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. Example 1 An epoxy-based silver paste was used on one side of a non-thermoplastic polyimide film 12 having a thickness of 50 μm.
As shown in the figure, the electrode width is 6 mm, the distance between the electrodes is 3 mm, and the thickness is 10
A μm electrode pattern 14 was formed. A silane coupling agent (A1100: manufactured by Nippon Unicar Co., Ltd.) so that the coating amount is 1.0 g / cm ² on the electrode pattern 14.
A soft fluororesin film (Sefuralsoft G150F200: manufactured by Central Glass Co., Ltd.) on which the layer 15 was formed was thermally laminated at a temperature of 200 ° C. to form an electrode protection layer 16. Thereafter, the film 34 was joined into a tubular shape to obtain the medium transport belt 10.

The paper adsorbing force of the medium transport belt 10 was measured as follows. 3 kV between the electrodes of the electrode pattern 14
As shown in FIG. 12, an A4 size paper 40 was attracted to the belt 10 as shown in FIG. 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 interface adhesive force of the medium transport belt 10 is J
The evaluation was performed in accordance with IS K 6854 “Testing method for peel strength of adhesive”. The type of test method was a 180 ° C. peel test. The belt was cut into a width of 25 mm and a length of 200 mm (the width direction was parallel to the electrode pattern, and the length direction was perpendicular to the electrode pattern). The interface between the polyimide film and the electrode protective layer was peeled off by 110 mm. In order to increase the rigidity of the polyimide film, a plastic plate was adhered to the back side of the polyimide film with a double-sided tape, and attached to a gripper of a tester that defined a previously peeled portion (Sefuralsoft G150F200) of the plastic plate and the test piece. Crosshead moving speed is 200 ±
Peeling was performed at 180 ° C. at 20 mm / min, and the peeling load (kg
/ Cm). Table 1 shows the results.

The electrical insulation of the medium transport belt 10 was evaluated as follows. A DC voltage of 0.5 kV was applied between the electrodes of the electrode pattern 14, and A4 size paper 40 was attracted to the belt 10 as shown in FIG. Then, wet the paper with water using a spray and gradually apply the voltage up to 3 kV. If the dielectric breakdown did not occur even when 3 kV was applied for 10 seconds or more, “「 ”, 3 kV for 1 second or more and 10 seconds or less "△" indicates that the dielectric breakdown was caused by applying the voltage, and "x" indicates that the dielectric breakdown occurred at 3 kV or less. Table 1 shows the results.

The appearance of the medium transport belt 10 was evaluated as follows. "O" indicates that no spot pattern is visible on the belt surface, and "X" indicates that the spot pattern is visible. Table 1 shows the results. [Examples 2 to 4] A medium transport belt 10 was obtained in the same manner as in Example 1 except that the silane coupling agent layer was formed at the coating amount shown in Table 1. That is, the silane coupling agent layer was formed with an application amount of 0.02 g / cm ² in Example ² , 0.2 g / cm ² in Example 3, and 3.0 g / cm ^{2 in} Example 4. Then, in the same manner as in the first embodiment, the paper 40
The adhesive strength, interfacial adhesive strength, electrical insulation properties, and appearance were measured and evaluated. Table 1 shows the results. Example 5 A medium transport belt 10 was obtained in the same manner as in Example 1 except that the coupling agent layer was formed of a titanate coupling agent (KR44: manufactured by Ajinomoto Co., Inc.). Then, in the same manner as in Example 1, the suction force of the paper 40,
The interfacial adhesion, electrical insulation, and appearance were measured and evaluated. Table 1 shows the results. [Example 6] In the same manner as in Example 1, except that a film obtained by adding 100 parts of barium titanate (BT-100P: manufactured by Fuji Titanium Industry Co., Ltd.) to 100 parts of a soft fluororesin was used for the electrode protective layer. A medium transport belt 10 was obtained.
Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. Table 1 shows the results. [Example 7] PVF (TTR10BG3:
A medium transport belt 10 was obtained in the same manner as in Example 1 except that Du Pont Co., Ltd.) was used. Then, in the same manner as in Example 1, the suction force of the paper 40, the interfacial adhesion force, the electrical insulation,
The appearance was measured and evaluated. Table 1 shows the results. Example 8 PVF (TWH15BL3:
A medium transport belt 10 was obtained in the same manner as in Example 1 except that Du Pont Co., Ltd.) was used. Then, in the same manner as in Example 1, the suction force of the paper 40, the interfacial adhesion force, the electrical insulation,
The appearance was measured and evaluated. Table 1 shows the results. Example 9 A layer 15 of a silane coupling agent (A1100: manufactured by Nippon Unicar Co., Ltd.) was formed on both sides of a non-thermoplastic polyimide film 12 having a thickness of 50 μm so that the coating amount was 1.0 g / cm ² . . As shown in FIG. 3, an electrode pattern 14 having an electrode width of 6 mm, a distance between electrodes of 3 mm, and a thickness of 10 μm was formed using an epoxy-based silver paste. On this electrode pattern 14, a soft fluororesin film (Sefralsoft G150F200: Central Glass Co., Ltd.)
Manufactured at a temperature of 200 ° C. to form an electrode protection layer 16.
Was formed. Thereafter, the film 34 was joined into a tubular shape to obtain the medium transport belt 10.

Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. Table 1 shows the results. Comparative Example 1 A medium transport belt 10 was obtained in the same manner as in Example 1 except that no coupling agent layer was formed. Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, Table 1
As shown in Table 2, the interfacial adhesion was very poor. [Comparative Example 2] The silane coupling agent layer was 5.0 g / cm.
^A medium transport belt 10 was obtained in the same manner as in Example 1 except that the medium transport belt 10 was formed. Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor. [Comparative Example 3] 5.0 g of titanate-based coupling agent layer
A medium conveyance belt 10 was obtained in the same manner as in Example 5, except that the medium conveyance belt 10 was formed at an application amount of / cm ² . Then, in the same manner as in Example 1, the suction force of the paper 40, the interfacial adhesion force, the electrical insulation,
The appearance was measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor. Comparative Example 4 A medium transport belt 10 was obtained in the same manner as in Example 6, except that no coupling agent layer was formed. Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, Table 1
As shown in Table 2, the interfacial adhesion was very poor. [Comparative Example 5] A silane coupling agent layer of 5.0 g / cm
^A medium transport belt 10 was obtained in the same manner as in Example 6, except that the medium conveyance belt 10 was formed with the application amount of ² . Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor. Comparative Example 6 A medium transport belt 10 was obtained in the same manner as in Example 7 except that the coupling agent layer was not formed. Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, Table 1
As shown in Table 2, the interfacial adhesion was very poor. [Comparative Example 7] 5.0 g / cm of the silane coupling agent layer
^A medium transport belt 10 was obtained in the same manner as in Example 7, except that the medium was formed with the application amount of ² . Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor. Comparative Example 8 A medium transport belt 10 was obtained in the same manner as in Example 1, except that the coupling agent layer was not formed. Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, Table 1
As shown in Table 1, the interfacial adhesion was very poor. Comparative Example 9 The silane coupling agent layer was 5.0 g / cm.
^A medium transport belt 10 was obtained in the same manner as in Example 1 except that the medium transport belt 10 was formed. Then, in the same manner as in Example 1, the adsorption force, interfacial adhesion force, electric insulation, and appearance of the paper 40 were measured and evaluated. As a result, as shown in Table 1, the adsorptive power, electrical insulation and appearance of the paper were very poor.

[0056]

[Table 1]

[0057]

According to the medium transport belt of the present invention, an electrode pattern is formed on a tubular material, paper is electrostatically attracted by applying a voltage, the structure and material characteristics of the belt are specified, and the tubular material is specified. By forming a layer of a predetermined amount of a surface treatment agent and / or a compound derived from the surface treatment agent between each constituent material such as an electrode pattern and an electrode protection layer, printing is performed in order to achieve a high speed of a printer or the like. Medium, such as a tube, an electrode pattern, an electrode protection layer, and the like. It has electrical insulation and appearance.

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

FIG. 10 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. 11 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. 12 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, 11, 17, 18, 19, 20, 24, 28, 2
9: Medium transport belt 12: Tubular object 14: Electrode pattern 15: Surface treatment agent and / or compound generated from surface treatment agent 16: Electrode protection layer 21: Film 22: Top coat layer 23, 26, 32: Resin layer 40: Paper

Claims (10)

[Claims] 1. A tubular article molded from a polyimide resin, a conductive electrode pattern, and a volume resistance value of 10 ⁹
10 to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 to 50.0
Wherein the surface treatment agent and / or a compound derived from the surface treatment agent is present in an amount of 0.0001 to 3 g / m ² between the polyimide resin and the electrode protection layer. belt. 2. The belt according to claim 1, wherein a surface treatment agent and / or a compound generated from the surface treatment agent is at least between the conductive electrode pattern and the polyimide resin and / or between the electrode pattern and the electrode protective layer. .0001-
^2. The medium transport belt according to claim 1, wherein the amount is 3 g / m < ² >. 3. The medium transport belt according to claim 1, wherein an electrode pattern having conductivity is formed on an outer peripheral surface of a tubular member formed of a polyimide resin. 4. A layer of a surface treatment agent and / or a compound derived from the surface treatment agent is formed on the inner peripheral surface of the tubular article molded from the polyimide, and a resin layer having the same composition as the electrode protection layer is formed. The medium transport belt according to claim 1, wherein the belt is formed. 5. The method according to claim 1, wherein the electrode protective layer has a thermal decomposition temperature of 200.
2. A composite resin layer formed by mixing a conductive powder and / or a high dielectric constant powder with a resin having a temperature of not less than ° C.
5. The medium transport belt according to any one of items 4 to 4. 6. The medium transport belt according to claim 1, wherein the water absorption of the electrode protection layer is 1.0% or less. 7. The medium according to claim 1, wherein the electrode protection layer is a composite resin layer obtained by mixing a conductive powder and / or a high dielectric constant powder with a fluorine-based resin. Conveyor belt. 8. The medium according to claim 1, wherein the electrode protection layer is a composite resin layer obtained by mixing a conductive powder and / or a high dielectric constant powder with an olefin resin. Conveyor belt. 9. The method according to claim 1, wherein a resin layer having alkali resistance is formed on an outer peripheral surface of the electrode protection layer.
9. The medium transport belt according to any one of items 1 to 8. 10. The method according to claim 9, wherein the resin layer having alkali resistance has a volume resistivity of 10 ⁹ to 10 ¹⁵ Ω · cm and a dielectric constant of 3.0 to 50.0. Media transport belt.