KR101549259B1 - Seamless belt and preparation method thereof - Google Patents

Abstract

The present invention provides a seamless belt having guide members for preventing skew and improving lifetime, and a method of manufacturing the same.

Description

Seamless belt and preparation method < RTI ID = 0.0 >

The present invention relates to a seamless belt used for an electronic device or a conveyor, and a method of manufacturing the same.

BACKGROUND OF THE INVENTION Generally, the use of belts is very diverse and has been used as a major replacement for gears in industries that use rotating shafts and motors, such as electronics, automobiles, or conveyors. In particular, it has been used as a fixing belt, an intermediate transfer belt, and a conveyance belt for use in a copying machine, a laser beam printer, a facsimile, and the like in electronic devices for fixing and transferring a toner image formed on a copying or transferring paper. Timing belts and conveyor belts used in automobiles are familiar parts for the general public.

The belt generally requires antistatic function since static electricity easily occurs during rotation. Semi-conductive property for antistatic function is also utilized as physical property for toner transfer in electronic equipment.

These belts range from small belts up to a few meters in diameter with a diameter of 20 mm on a tubular basis. However, most of the belts are flat belts or V-belts with seams, which have irregularities at the seams and have different surface characteristics from those at the seams. Particularly, the intermediate transfer belt of an electronic apparatus using a flat surface of a belt, in particular, a color laser printer, may cause irregularities of the belt surface to damage the optical drum or deteriorate the quality of a printed image. Also, if the joint is twisted little by little, the straightness of the tubular belt may be damaged, which may cause wicking during rotation. There is a possibility that the belt itself may be damaged when the belt is separated from the driving roll due to the skew of the belt.

Therefore, if there is no joint on the tubular belt, the maximum durability of the belt material can be obtained. Since there is no unevenness, it is possible to prevent the object contacting the belt or the belt from spinning during rotation and to secure the straightness of the belt easily have.

In particular, fixing belts and intermediate transfer belts used for electronic devices such as printers, copying machines, multifunctional apparatuses, facsimile machines and the like must have excellent stain resistance, heat resistance, heat radiation characteristics, elasticity, antistatic properties, durability, water repellency, oil repellency, And a property of having a proper surface resistance value for the function of transferring toner is required. When the surface resistance value is higher or lower than the required surface resistance value, the antistatic property, the transfer property, the image property, The physical properties such as the performance may be deteriorated and fatal defects of the printed image defect may be caused.

When the belt for an electromagnetic device is mounted on an electronic device, the rollers come into contact with the inside of the belt to rotate the belt in the electronic device. When the belt rotates together with the belt, the tension of the belt in the width direction of the belt, So that the rotating roller and the seamless belt do not coincide with each other at their both ends, and the belt may be damaged due to rotation of the roller at the initial position. In addition, if such a slip phenomenon occurs, the toner may not be transferred to a predetermined position in a process of repeatedly transferring the toner of a plurality of colors, so that a normal image may not be provided and a medium such as paper may be curled.

Therefore, it has been required to manufacture a belt (hereinafter referred to as a seamless belt) that does not have a seam to prevent such slip phenomenon and skewing.

      Conventional seamless belt manufacturing methods include, for example, a roll coating method in which a polymeric resin is applied to the outer circumferential surface of a cylindrical cylinder, followed by heat treatment such as drying, and a polymeric resin is obtained from the cylinder to obtain a seamless belt; An extrusion method of extruding a molten polymer resin through a circular die to obtain a seamless belt, and the like, or the like. Such a seamless belt may be used as it is without any special treatment. However, in order to prevent the above-mentioned skewing of the belt, a rail of urethane or the like is attached to the inner circumferential surface of the belt as shown in FIG. 3, Member) in many cases. However, when the guiding member is simply adhered to the inner circumferential surface of the seamless belt, the belt and the guiding member are often peeled off, which results in a problem that the life of the belt is shortened due to the repeated tension difference and the minute impact.

     On the other hand, seamless rubber materials and synthetic rubber materials have short life span. Accordingly, a product for a polyimide or a polyamide resin has recently been released. However, even though the mechanical properties of the material are excellent, the problem of the guide member can not be solved, so that the life of the original product can not be shown.

The present invention seeks to provide a guide member-attached seamless belt for preventing skew and improving the life.

Also, in one embodiment of the present invention, there is provided a seamless belt having antistatic function, semiconducting property and excellent mechanical properties.

In another embodiment of the present invention, there is provided a method of manufacturing such a seamless belt.

According to a first preferred embodiment of the present invention, there is provided an image forming apparatus comprising: a guide member adhered and formed to cover at least inner and outer sides along at least one edge of an end; It provides a seamless belt with a surface resistance value of 10 ⁷ ~ 10 ¹³ Ω / □.

In a specific example, the guide member may have a cross-section of a 'C' shape.

In this embodiment, the guide member may be an integral type having a groove having a U-shaped shape or may be obtained by bonding two or more members. In terms of adhesive strength, the depth of the guide member may be 20 to 80% of the total width of the guide member.

In this embodiment, the guide member may be formed of one or more members selected from urethane resin, silicone resin, polyethylene resin, polyvinyl chloride resin, polystyrene resin, polypropylene resin, nylon, acrylic resin, nitrile rubber (NBR), chloroprene rubber, Or may be made of more than two kinds of materials.

The guide member may have a Shore hardness of 95 A or less.

The seamless belt according to an embodiment of the present invention may have an internal rotation test of 300,000 times or more as a result of an internal rotation test with a tension of 1 kg. In particular, after performing 100,000 rotations with an internal rotation test method of a tension of 1 kg, The rate of change of the peeling force may be within 20%.

In one embodiment of the present invention, the guide member may have a total width of 2 to 20 mm and a total thickness of 0.5 to 5 mm.

The seamless belt according to an embodiment of the present invention may have a single layer or a multi-layer structure formed of a single material selected from polyimide, polyamideimide, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, nylon, Lt; / RTI >

According to another embodiment of the present invention, there is provided a process for producing a seamless belt comprising the steps of uniformly applying a polymer resin constituting a seamless belt to an inner surface of a tubular belt base material while rotating the tubular belt base material; Drying and curing the polymer resin applied to the inner surface of the tubular belt substrate; Removing the seamless belt from the tubular belt base material; A process that alters both ends of the seamless belt; And adhering the guide member to the at least one end of the seamless belt so as to surround the frame along the rim of the seamless belt.

The guide member-attached type seamless-type belt according to one embodiment of the present invention prevents skewing during running of the seamless belt and can improve the lifetime of the seamless belt, and also exhibits antistatic function, semiconducting property and excellent mechanical property, .

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a process flow chart for manufacturing a seamless belt according to a preferred embodiment of the present invention. The method for manufacturing a seamless belt as shown in Fig. 1 of the present invention is a method for manufacturing a seamless belt, comprising rotating a tubular belt base material, uniformly applying the polymer resin constituting the seamless belt belt to the inner surface of the tubular belt base material, drying and curing the polymer resin, Removing the belt, cutting both ends of the seamless belt, and bonding the guide member to one end or both ends of the seamless belt. In this case, the step of applying the polymer resin and the step of drying and curing may be repeated two or more times in order to manufacture a seamless belt of two or more layers. However, the method of manufacturing the seamless belt is not limited thereto.

FIG. 2 is a cross-sectional view of a seamless end of a seamless belt with a guide member wrapped around a rim of the end according to a preferred embodiment of the present invention, and FIG. 3 is a sectional view of a seamless end of the seamless belt with an existing guide member attached to the inner surface. 4 is a cross-sectional view showing a state in which two or more layers of the seamless belt according to another preferred embodiment of the present invention are laminated.

3, the conventional seamless belt 31 has a guide member 30 adhered to an inner surface of a belt end, and the seamless belt 21 according to an embodiment of the present invention has at least one edge And a guide member 20 which is adhered to the inner side and the outer side surface in a wrapping manner. Since the guiding member 20 having such a shape is bonded to the inner and outer surfaces of the seamless belt unlike the case where the guiding member 20 is adhered only to the inner surface of the seamless belt, Even if peeling of the guide member 20 and the guide member 20 occurs, the other side is adhered to prevent the seamless belt 21 or the guide member 20 from being separated from each other. On the other hand, in the case of the conventional method, when the peeling occurs due to the poor adhesive force between the seamless belt 31 and the guide member 30, the peeled guide member can immediately cause a meander.

It is preferable that the guide member 20 has a cross-sectional shape in a " C " shape in consideration of the improvement of adhesion with the seamless belt. It may be an integral type, The integrated guide member is formed with a groove for allowing the end of the seamless belt 21 to be easily inserted, and after the adhesive 22 is injected into the groove, It is possible to insert the edge of one end of the belt 21. The adhesive is injected such that the total thickness 23 of the seamless belt including the adhesive layer thickness is 1.2 to 10.0 times the thickness of the seamless belt, The depth 24 of the groove of the guide member to be adhered is preferably 20 to 80% of the width of the entire guide member, It is preferable to indicate that the adhesive force. However, not limited to this.

The width and the thickness of the guide member are not particularly limited and may be varied depending on the user's request. However, considering the adhesion to the seamless belt and the prevention of separation from the guide roller, the overall width is 2 to 20 mm, 5 mm.

The guide member 20 may be made of one or more materials selected from urethane resin, silicone resin, polyethylene resin, polyvinyl chloride resin, polystyrene resin, polypropylene resin, nylon, acrylic resin, nitrile rubber (NBR), chloroprene rubber and ethylene rubber Material.

The guide member 20 may have a Shore hardness of 95 A or less. The hardness of the guide member 20 should be excellent in flexibility to facilitate the use of the seamless belt. However, when the Shore hardness is less than 50A, the hardness may be weak and the durability may be weak. When the shore hardness is more than 95A, the bending radius of the seamless belt becomes large and the diameter of the driving roll or the rotary roll becomes large, It is preferable to have a Shore hardness of preferably 50A to 95A.

According to one embodiment of the present invention, the seamless belt 21 is made of a polymer resin, and may include a conductive filler or a reinforcing member.

Examples of the polymer resin include a thermoplastic resin and a thermosetting resin. Preferably, the thermoplastic resin may be a polyamide resin, a polyimide resin, a silicone resin, or a fluororesin, or a mixture of two or more thereof. Polyimide resin is suitable in terms of heat resistance and durability.

As shown in Fig. 4, the seamless belt 21 of the present invention may be a laminate of two or more layers.

In addition, the reinforcing member may include a reinforcing member for the purpose of enhancing the mechanical characteristics of the seamless belt 21. The reinforcing member is not particularly limited and may be applied with a flexible material. Preferably, the reinforcing member is made of aramid fibers, Glass fibers, carbon fibers, and the like. In this case, in order to prevent unevenness on the surface of the seamless belt 21 due to the reinforcing member, it is preferable that the reinforcing member has a size of 25 μm or less, or that the resin of the layer including the reinforcing member or the layer laminated thereon is applied higher than the reinforcing member thickness, .

The polyimide resin capable of producing the seamless belt 21 has the advantages of excellent thermal stability and excellent mechanical and electrical properties, but has a high glass transition temperature, have. Also, the surface resistance value has a higher value than the resistance value required as a seamless belt. Therefore, it is preferable to mix the conductive filler, and a dispersant may be further added to the dispersion after mixing the conductive filler in the solvent.

A method of manufacturing the seamless belt 21 will be described below with reference to a case where a polyimide resin is used. When the conductive filler and additive are further added, the additive is dispersed in a solvent, and the diamine and dianhydride are added thereto to prepare a polyamic acid solution containing the conductive filler at 0 to 30 ° C for 30 minutes to 12 hours. Alternatively, the conductive filler and the additive may be added after the polyamic acid solution is prepared.

The diamines and dianhydrides are not particularly limited as far as they are used in the production of polyimide resins. Examples of the diamines include 4,4'-Oxydianiline (ODA), para-Phenylene Diamine, pPDA, meta-Phenylene Diamine (mPDA), para-Methylene Diamine (pMDA), meta-Methylene Diamine (mMDA), oxyphenylenediamine 4,4'-Oxyphenylen Diamine (OPDA), and the like can be used. As the dianhydride, 1,2,4,5-benzenetetracarboxylic dianhydride (PMDA), benzophenone dianhydride 3,3 ', 4,4'-benzophenonetetracarboxylic dianhydride (BTDA), 3,3', 4,4'-biphenyltetracarboxylic dianhydride (BPDA), 4,4-oxydiphthalic dianhydride anhydride, ODPA), but the present invention is not limited thereto. Generally, diamines and dianhydrides can be used in an equimolar amount of 1: 0.99 to 0.99: 1 molar ratio.

The prepared polyamic acid solution is coated on the outer circumferential surface of the tubular belt base material for forming the seamless belt 21, and then imaged by being carried on the catalyst or heat-treated (step 'drying + curing' in FIG.

The catalyst may be a mixture solution of pyridine or isoquinoline and acetic anhydride diluted in a solvent. The imidization reaction is carried out by a dehydration reaction so that the tubular belt base coated with the polyamic acid solution is supported on the catalyst mixture solution while being rotated, and then the temperature is raised in the range of 100 ° C to 300 ° C to completely remove the solvent and moisture, The seamless polyimide film can be produced and released from the tubular belt substrate to produce the seamless belt 21. [

The heat treatment is performed stepwise at 60 to 400 ° C. First, pre-baking is performed at 60 to 80 ° C for 5 to 100 minutes to remove the solvent and moisture remaining on the surface. Thereafter, the temperature was raised at a rate of 1 to 10 ° C. per minute, and the temperature was raised to a maximum temperature of 250 to 400 ° C., followed by holding for 10 minutes to 3 hours. Finally, post-curing was performed to completely remove the solvent and moisture present on the surface The imitation process is completed and completed, the solidified polyimide film is produced, and the seamless belt 21 can be manufactured by releasing from the tubular belt substrate.

The fluororesin capable of producing the seamless belt 21 is a synthetic resin having a structure in which a main chain is a bond such as a polyolefin having C-C bond, in which a part or all of hydrogen of the polyolefin is replaced by a fluorine atom.

There are eight kinds of fluorine resins available on the market, of which 70% of the fluoroethylene (PTFE) is representative. PTFE is a crystalline resin known as Teflon, which is a polymer resin that has heat resistance to long-term use at 260 ° C and is excellent in chemical resistance, electrical insulation, high frequency characteristics, non-adhesiveness, low friction coefficient and flame retardancy.

In addition, the polyamide resin, the silicone resin and the like which can manufacture the seamless belt 21 also have excellent mechanical strength and heat resistance.

The fluororesin, the polyamide resin, the polystyrene resin, and the silicone resin may be mixed with the conductive filler by the same method as that of the polyimide to impart the antistatic property or the desired semiconducting property. The thus-prepared seamless resin solution for a belt is applied to the inner surface of a tubular belt base material for forming a seamless belt as shown in Fig. 1 and then dried to produce the seamless belt 21.

However, the above-mentioned polymer resin in the present invention is only a preferred example, but the present invention is not limited thereto. For example, if a film can be produced, a seamless belt can be manufactured. In particular, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, nylon, liquid crystal polymer film, or the like manufactured by a conventional extrusion method can be used.

In order to provide excellent antistatic property, antistatic property and printability, the manufactured seamless belt 21 preferably has a surface resistance value of 10 ⁷ to 10 ¹³ Ω / □, more specifically 10 ⁹ to 10 ¹¹ Ω / □ The conductive filler for controlling the electrical resistance of the seamless belt 21 may be selected from the group consisting of ketjen black, acetylene black, furnace black, graphite powder, Graphite, and carbon nanotube may be used in an amount of 0.1 to 20 wt% based on the total solute. In addition, it may further include a metal filler, and may be used in an amount of 0.1 to 5% by weight based on the total solute.

In particular, Ketjenblack and multi-wall carbon nanotubes are conductive carbon materials that can exhibit antistatic properties and semiconducting properties. They are excellent in conductivity compared to other materials, , Exhibits excellent electrical properties, has a very small impurity content, and is suitable for use in the present invention. Meanwhile, the metal filler may be, but not limited to, Dentall TM-200 doped with (or supported on) antimony in nickel, silver or mica.

The conductive filler may be mixed with and dispersed in the polymer resin solution constituting the seamless belt 21, separately in a solvent used for the polymer resin, and then mixed with the polymer resin solution. The dispersion may be carried out by using at least one type of ball mill, beads mill, sand mill, 3-roll mill, homogenizer and ultrasonic dispersing machine And dispersants may be added to improve dispersion stability. The dispersant may be selected from Disperbyk, Synergist and the like of BYK.

The width and thickness of the seamless belt 21 are not particularly limited because they are used in various applications. However, the seamless belt used in a printing apparatus such as a copying machine, a printer, a multifunction apparatus, a facsimile machine or the like preferably has a thickness of 40 탆 to 500 탆 and a width of 200 to 500 mm.

The tubular belt base material which can be used for manufacturing the seamless belt 21 of the present invention is not particularly limited as to the type and size of the material. However, it is of special significance that the diameter is 500 mm or more, which is a limit area of the existing seamless belt manufacturing method. In particular, the tubular belt substrate may be cylindrical or may be of a flexible belt type. In this case, in the case of a flexible belt type, the tubular belt base material may be used as a method of manufacturing by coating the polymeric resin constituting the seamless belt on the outer surface of a flexible belt.

The flexible tubular belt substrate should have sufficient flexibility to be able to rotate and mount on more than one cylindrical roller to apply and form the seamless belt 21 resin.

The tubular belt substrate may be made of stainless steel, iron, copper, chromium, nickel, and ceramic mixed materials alone or in combination. The releasing layer may be provided on the inner circumferential surface or the outer circumferential surface for the purpose of improving releasability. The releasing layer is not particularly limited as long as it is a material having heat resistance, and examples thereof include silicone, heat-resistant composite teflon, and the like.

The method for applying the resin for a seamless belt to the tubular belt base material may be carried out by a method using a dispenser, a gravure coating method, a die casting method, a reverse coating method, a dipping method, A comma coating method, a spray coating method and the like can be applied.

The manufactured seamless belt 21 can be adhered to the guide member 20 having the same shape as described above for the purpose of preventing skewing of the belt by aligning both ends of the seamless belt 21 in accordance with the width of the product.

From this, it is possible to provide a seamless belt which can be used in electronic devices such as semi-conductive type laser printers, facsimiles and copying machines with improved antistatic properties, antistatic properties and printability.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to these Examples.

≪ Preparation Example 1 &

1480 g of DMF and 10.0 g of Ketjenblack (KETJENBLACK EC 600 JD, Ketjenblack, Japan) were mixed with a 2 L four-necked flask equipped with a mechanical stirrer, a reflux condenser and a nitrogen inlet, 16.0 g of ODA (Wakayama, Japan) and 40.3 g of p-PDA (DuPont) were dissolved in 117.6 g of s-BPDA (Ube Industries, Japan) , Japan) was added thereto to prepare a semiconductive polyamic acid.

The prepared semiconductive polyamic acid was a uniform black solution having a viscosity of 200 poise.

≪ Example 1 >

A mold release agent (Copia, Korea) was spray-coated on a seamless mold having a diameter of 300 mm, a thickness of 5 mm, and a width of 500 mm of chrome-plated SUS 304 material and rotated on a rotary molding machine as shown in Fig. The prepared semiconductive polyamic acid solution, the isoquinoline solution, and the acetic anhydride 50:50 and the catalytic solution diluted to 30 wt% concentration in DMAc were uniformly applied through a two-liquid mixing dispenser coater to progress the imidation reaction. Thereafter, the molding die was placed in a drying oven, and the temperature was raised at a rate of 10 ° C / min at a heating rate of 100 ° C, 200 ° C and 300 ° C for 30 minutes to complete the imidization reaction, After cooling, a polyimide film was obtained from an SUS belt to produce a seamless belt having a thickness of 65 mu m, and both ends of the seamless belt were cut to have a width of 300 mm.

On the other hand, a urethane guide member 20 having a width of 4 mm and a length of 942 mm was obtained from a urethane sheet having a Shore hardness of 80 A and a thickness of 2.0 mm. A urethane guide member 20 having a depth of 2 mm at a point of 1.0 mm in the thickness direction of the urethane guide member, (24).

An adhesive agent (22) was injected into the groove of the urethane guide member, and one end of the seamless belt was inserted into the groove of the urethane guide member into which the adhesive was injected, followed by being left for 24 hours. At this time, the total thickness of the guide member at the portion where the adhesive was injected was 2.2 mm, and it was found that the height at which the adhesive was injected was 0.2 mm. Thereby, a seamless belt (21) including a urethane guide member covering the inner side surface and the outer side surface along the rim of one end of the seamless belt was produced.

≪ Example 2 >

Two urethane guide members each having a width of 4 mm and a length of 942 mm were obtained from a urethane sheet having a Shore hardness of 80 A and a thickness of 1.0 mm and adhered to the inner surface of one end of the seamless belt produced in Example 1 using the same adhesive as in Example 1 Respectively. At this time, only 2 mm in the width direction of the urethane guide member was bonded to the seamless belt. Another urethane guide member was adhered to the outer surface of the seamless belt using an adhesive, and adhered to the urethane guide member bonded to the inner surface of the seamless belt. Thereby, a seamless belt including a urethane guide member covering one end of the seamless belt was produced.

≪ Comparative Example 1 &

Two urethane guide members each having a width of 4 mm and a length of 942 mm were obtained from a urethane sheet having a Shore hardness of 80 A and a thickness of 1.0 mm and adhered to the inner surface of one end of the seamless belt produced in Example 1 using the same adhesive as in Example 1 Respectively. At this time, all the width direction of the urethane guide member was made to adhere to the seamless belt. Thus, the adhesion surface of the urethane guide member and the seamless belt was substantially the same as that of Examples 1 and 2 above.

The seamless belts prepared in the above Examples and Comparative Examples were evaluated by the following methods, and the results are shown in Table 1 below.

(1) Peeling force of the seamless belt and guide member

The release force was measured by pulling the seamless belt and the guide member in the direction of 180 from the end of the manufactured seamless belt. In order to measure the peeling force, the lengthwise end of the guide member was peeled off 5 cm and measured with a measuring instrument.

Size of specimen

   - Length: 150mm

Peeling condition

   - Peeling angle of guide member to tubular belt: 180 °

   - Grip distance: 100mm

   - Speed: 50mm / min

   - Load Cell: 1kN

   - Measuring instrument: Instron 3300series

(2) Internal rotation

Wherein one of the two rollers is a rotation drive roller and the other roller is a device capable of applying a tension to the seamless belt while moving horizontally with respect to the other rollers, The two rollers include a guide roller into which a guide member of a seamless belt is inserted, and the manufactured tubular belt is put on, and the rotation of the guide member or the tubular belt is started by maintaining the tension of 1 kg / And the number of revolutions at the time of completion was confirmed. The lower the rotation speed, the lower the durability of the belt.

(3) Peeling force of seamless belt and guide member Durability

The test was carried out in the same manner as in the above-mentioned internal rotation test, and the peel strength test of the seamless belt and the guide member was carried out with 100,000 rotations.

Peeling force of seamless belt and guide member
(kgf / cm) The inner rotation of the seamless belt provided with the guide member
(time) The seamless belt and guide member
Peel strength Durability
(kgf / cm) Rate of peeling force change after internal rotation test
(%) Example 1 0.75 490,000 0.70 6.67 Example 2 0.72 470,000 0.65 9.73 Comparative Example 1 0.65 210,000 0.41 36.93

As a result of the physical property measurement, the seamless belt having the guide member for wrapping the end of the seamless belt was found to have excellent peel strength even though the same adhesive and the same adhesive area were used for evaluation. More importantly, Example 1 and Example 2 exhibited peel forces that were not substantially changed in the peel strength endurance test, whereas Comparative Example 1 showed reduced peel forces. Likewise, the seamless belt having the guide member wrapping the end of the seamless belt exhibited excellent performance even in the internal rotation test.

Thus, it has been confirmed that the seamless belt having the guide member for wrapping the end of the seamless belt manufactured by the manufacturing method provided by the present invention has improved life span of the product and excellent performance in preventing skewing.

1 is a flowchart of a seamless belt manufacturing process according to a preferred embodiment of the present invention,

FIG. 2 is a longitudinal sectional view of a side surface of a seamless belt provided with a guide member according to a preferred embodiment of the present invention,

Fig. 3 is a longitudinal sectional view of a side view of a seamless belt provided with a guide member of a conventional seamless belt,

4 is a cross-sectional view of a seamless belt comprising a plurality of layers according to a preferred embodiment of the present invention.

DESCRIPTION OF THE RELATED ART [0002]

20, 30: guide member 21, 31: seamless belt

22: Adhesive 23: Adhesive layer thickness included Seamless belt thickness

24: depth of the guide member groove surrounding the rim of the seamless belt 41:

42: Second resin layer

43: Third resin layer

Claims (11)

The guide member being formed by adhering an inner side surface and an outer side surface of the belt along at least one edge of the belt and having a total width of 2 to 20 mm and a thickness of 0.5 to 5 mm, The guide member is provided with a groove having a depth of 20 to 80% with respect to the total width of the guide member such that the cross section of the guide member is 'C' The belt has a surface resistance value of 10 ⁷ to 10 ¹³ Ω / sq, Wherein the rate of change of the 180 占 peeling force between the guide member and the seamless belt is 20% or less after 100,000 rotations are carried out by the internal rotation test method with a tension of 1 kg. delete 2. The seamless belt according to claim 1, wherein the guide member is an integral type having a groove having a " C " shape or is obtained by adhering two or more members. delete The guide member according to claim 1, wherein the guide member is made of a material selected from the group consisting of urethane resin, silicone resin, polyethylene resin, polyvinyl chloride resin, polystyrene resin, polypropylene resin, nylon, acrylic resin, nitrile rubber (NBR), chloroprene rubber, A seamless belt made of more than one kind of material. The seamless belt according to claim 1, wherein the guide member has a Shore hardness of 95 A or less. 2. The seamless belt according to claim 1, wherein the internal rotation resistance of the 1 kg test is 300,000 or more. delete delete The belt according to claim 1, wherein the belt is a single layer or a multi-layer structure formed of a single material selected from polyimide, polyamideimide, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, nylon and liquid crystal polymers, In seamless belt. delete

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