JP2007171855A - Meandering prevention guide tape and seamless belt, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meandering prevention guide tape which has a meandering prevention function stable for a long period of time and can be easily manufactured with a low cost, a seamless belt using the same, a method for manufacturing the seamless belt, and, particularly, a seamless belt appropriate for an image forming apparatus and a manufacturing method thereof. <P>SOLUTION: The meandering prevention guide tape has a plurality of layers including an elastic base layer, an adhesive layer provided on one surface side of the elastic base layer, a peeling material layer protecting the adhesive layer, and a highly elastic member layer provided via a tacky adhesive layer on the other surface side of the elastic base layer, in which the highly elastic member layer has an elastic modulus in tension of ≥1 GPa, and the elastic base layer has an elastic modulus in tension of <1 GPa. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a meandering prevention guide tape suitable for preventing meandering of a seamless belt, a seamless belt using the same, and a method for producing the same.

  Seamless belts are frequently used in photosensitive devices, intermediate transfer devices, transfer conveyance devices, transfer separation devices, and the like incorporated in electrophotographic image forming apparatuses such as copying machines, laser printers, and facsimile receivers. As an image forming apparatus in which a seamless belt is applied to an intermediate transfer belt, a full-color image forming apparatus shown in FIG. 6 can be exemplified. The image forming apparatus shown in FIG. 6 is provided with electrostatic latent image units 100A to 100D for each color of yellow, magenta, cyan, and black. Each electrostatic latent image unit is provided with a photosensitive drum 101 that is driven to rotate at a constant speed Vf in the direction of arrow A. A charging charger 102, an optical writing device 103 using laser light, and toner are accommodated around the photosensitive drum 101. A developing device 104 and the like are provided. An intermediate transfer belt 106 disposed so as to come into contact with the photosensitive drum of each electrostatic latent image unit is stretched around a driving roller 107 and three driven rollers 108 to 110, and is synchronized with the photosensitive drum rotating in the direction of arrow A. Thus, it is provided to rotate in the direction of arrow B at a constant speed Vf. Primary transfer rollers 111 </ b> A to 111 </ b> D are disposed at positions facing the electrostatic latent image units with the intermediate transfer belt 106 interposed therebetween, and a secondary transfer roller 112 is provided to face the roller 110. Further, a cleaning blade 114 is provided at a position facing the driven roller 108 with the intermediate transfer belt 106 interposed therebetween.

  In order to form an image with such an image forming apparatus, in each electrostatic latent image unit, the surface of the photosensitive drum is uniformly charged by the charging charger 102, and the electrostatic latent image is transferred onto the photosensitive drum by the optical writing device 103. To form. The electrostatic latent image on the photosensitive drum is visualized as a toner image by a toner attached thereto by a developing device. The toner image is transferred onto an intermediate transfer belt by applying a transfer bias by a primary transfer roller facing the photosensitive drum. At this time, the toner images formed by the electrostatic latent image units 100A to 100D are sequentially superimposed and transferred onto the intermediate transfer belt as the intermediate transfer belt rotates. The superimposed toner image is applied with a transfer bias having a reverse polarity by the secondary transfer roller 112 and is secondarily transferred onto the transfer material 113 conveyed between the secondary transfer roller and the intermediate transfer belt. The toner image transferred to the transfer material is fixed to the transfer material by a fixing device (not shown) by heating, pressing, or the like. On the other hand, the residual toner on the intermediate transfer belt is scraped off by a cleaning blade that moves in contact with the intermediate transfer belt at an arbitrary timing, and is collected in the waste toner box 115, and the intermediate transfer belt recovers the initial state.

  In order to rotationally drive a seamless belt such as the intermediate transfer belt 106 with high accuracy, the axes of the rollers 107, 108, 109, and 110 rotating in contact with the intermediate transfer belt are parallel to each other. The roundness and straightness of the roller must be high. Furthermore, it is necessary that the film thickness and circumference of the intermediate transfer belt are uniform. If these conditions are not satisfied, the intermediate transfer belt meanders, and the toner image from each electrostatic latent image unit is transferred onto the intermediate transfer belt 106 which is blurred from a predetermined position, and each toner image is accurately superimposed. A faithful image cannot be formed.

  In order to prevent such a meandering of the seamless belt, as shown in FIG. 7, from both ends of the inner peripheral surface of the seamless belt 201 from an elastic body such as rubber along the circumferential direction so as to protrude in the inner peripheral direction. A belt in which the meander prevention guide 202 is joined has been reported (Patent Document 1). This meandering prevention guide 202 is brought into contact with both side surfaces of the driven roller 203 on which the belt is suspended so as to abut against the flange member 204 provided so as to be free to rotate on the driven roller 203, thereby suppressing the meandering accompanying the rotational driving of the belt. is doing. This seamless belt meandering prevention method has a very stable meandering prevention function and is inexpensive, and has been adopted in various electrophotographic image forming apparatuses.

  On the other hand, the meandering prevention guide tape used by adhering to a seamless belt is composed of an elastic body, an adhesive layer and release paper, an elastic body, a reinforcing member having a tensile modulus of 100 MPa or less, an adhesive layer, and release paper (Patent Document 2). Also, an elastic body, a reinforcing member having a tensile elastic modulus of 100 to 500 MPa, an adhesive layer, a release paper (Patent Document 3, Patent Document 4), an elastic body, a reinforcing substrate having a tensile elastic modulus of 500 MPa or more, an adhesive layer, a release layer There are those made of paper (Patent Documents 5 and 6).

  As a method of affixing such a meandering prevention guide tape to a seamless belt, a method of adhering the meandering prevention guide tape and the seamless belt while pressing is common. Specifically, the string-like meandering prevention guide tape held by the meandering prevention guide tape holding means is arranged to be pressed against the inner peripheral surface of the seamless belt held in a cylindrical shape by the holding means. A method of rotating the seamless belt holding means relative to the meandering prevention guide tape holding means by the rotation driving means and sticking the meandering prevention guide tape to the inner peripheral surface of the seamless belt can be mentioned (Patent Document 7). Also, the meandering prevention guide tape is arranged on the outer periphery of the cylindrical support member so that the adhesive surface faces the outer surface, and the cylindrical seamless belt supported by the cylindrical member is placed on the tape, and the adhesive surface of the meandering prevention guide tape is pressurized. (Patent Document 8) and the like.

  When the sticking method described in Patent Document 7 is used, the meandering prevention guide tape is stuck while receiving a constant pressure, so that the meandering prevention guide tape is stuck in a stretched state under tension. At this time, it is difficult to always adhere a meandering prevention guide tape having a fixed length due to variations in elastic modulus among individual meandering prevention guide tapes, variations among lots, and fluctuations in the pressing force of the attaching device. For this reason, as shown in FIG. 8, a meandering prevention guide tape 83 having a length obtained by adding a surplus to a required length is used and adhered to the inner peripheral surface of the seamless belt 81. After that, it is necessary to cut the surplus portion of the meander-preventing guide tape and to join both ends together or to have a predetermined gap, resulting in a problem of cost increase due to an increase in the number of steps.

  Moreover, when sticking the meandering prevention guide tape described in patent document 5 to the inner peripheral surface of a seamless belt, in what provided the reinforcement member of the tensile elasticity modulus 0.5-1GPa, it is extended at the time of sticking and after sticking A relative alignment process at both ends of the seamless belt may be required. In addition, in the case where a reinforcing member having a tensile elastic modulus of 1 GPa or more is provided, unpredictable stretching at the time of sticking is removed, and it becomes possible to cut into a meandering prevention guide tape having a necessary length, and wasteful consumption. Can escape. However, there is a problem that the flexibility of the meandering prevention guide tape cannot be obtained sufficiently, and the meandering prevention function utilizing elastic deformation cannot be obtained sufficiently. Furthermore, in a seamless belt in which such end-measuring meandering guide tape is bonded by bonding its ends, stress concentration occurs in the joining portion of the meandering-preventing guide tape when the seamless belt is used. There is a problem in that the seamless belt is easily broken.

Moreover, in the sticking method described in Patent Document 8, when the seamless belt is removed from the apparatus after the meandering prevention guide tape is stuck to the seamless belt, it is necessary to remove the seamless belt holding part from the apparatus, which may make automation difficult. is there. Furthermore, it becomes very difficult to attach meandering prevention guide tapes to both ends of the seamless belt.
JP 2000-155478 A Japanese Patent No. 3104547 JP 2000-28922 A JP 2000-28923 A JP-A-8-225178 JP 2001-328745 A Japanese Patent Laid-Open No. 10-86232 JP 2002-55532 A

  An object of the present invention is to provide a meandering-preventing guide tape that has a function of preventing meandering that is stable over a long period of time in a seamless belt, and can be easily and inexpensively manufactured, and a seamless belt using the same, and manufacture of a seamless belt It is to provide a method. In particular, it is to provide a seamless belt suitable for an image forming apparatus and a method for manufacturing the same.

  The inventor has adhered to a seamless belt when the meandering prevention guide tape has a plurality of specific layers, a layer having a tensile elastic modulus of 1 GPa or more, and a layer having a tensile elastic modulus of less than 1 GPa. It was found that the meandering prevention guide tape can be restrained from being stretched. For this reason, the knowledge that it can affix evenly to the inner peripheral both sides of a seamless belt with few processes was acquired. Furthermore, it has been found that by removing a layer having a tensile modulus of 1 GPa or more after being attached to a seamless belt, the meandering prevention guide tape has flexibility with meandering prevention performance utilizing elastic deformation. It was. Furthermore, when removing the high-elasticity member layer, the adhesive layer has a specific relationship as an adhesive force to the lower layer and the high-elasticity member layer. The knowledge that the highly elastic member layer can be easily removed was obtained. Based on this knowledge, the present invention has been completed.

  That is, the present invention provides an elastic base material layer, an adhesive layer provided on one surface side of the elastic base material layer, and the adhesive layer in the meandering prevention guide tape provided on the seamless belt to prevent meandering And a high elastic member layer provided on the other surface side of the elastic base material layer via an adhesive layer, and the high elastic member layer has a tensile elastic modulus of 1 GPa or more. And an elastic base material layer having a tensile elastic modulus of less than 1 GPa.

  The present invention also relates to a seamless belt to which the meandering prevention guide tape according to any one of claims 1 to 6 is adhered.

  Moreover, this invention is a method of manufacturing the seamless belt of Claim 7 or 8, Comprising: While peeling the peeling material layer of the meander prevention guide tape in any one of Claims 1-6, the inner peripheral surface of a seamless belt A method for producing a seamless belt, wherein the adhesive layer is adhered to the seamless belt by pressing to the seamless belt, or a method for producing the seamless belt according to claim 7 or 8, wherein: Adhering the adhesive layer to the seamless belt by pressing against the inner peripheral surface of the seamless belt while peeling off the release material layer of the meander prevention guide tape of the tape, the adhesive layer peels between the adhesive layer and the lower layer of the meander prevention guide tape. It is related with the manufacturing method of the seamless belt characterized by removing an upper layer from.

  The meander-preventing guide tape of the present invention has a meandering-preventing function that is stable over a long period of time in a seamless belt, and can be easily and evenly adhered to both sides of the inner surface of the seamless belt with a small number of steps. . In particular, it is suitable for a seamless belt used in an image forming apparatus.

  In addition, the seamless belt of the present invention has a stable meandering preventing function over a long period of time, and is particularly suitable for an image forming apparatus.

  In addition, the seamless belt manufacturing method of the present invention suppresses the meandering prevention guide tape from being stretched, so that it can be applied evenly to both sides of the seamless belt easily and with a small number of steps. Can be manufactured at low cost. In particular, it can be suitably used as a method for producing a seamless belt for an image forming apparatus.

  The meandering prevention guide tape of the present invention is provided on a seamless belt. An elastic base material layer, an adhesive layer provided on one surface side of the elastic base material layer, a release material layer for protecting the adhesive layer, and an adhesive layer provided on the other surface side of the elastic base material layer And a plurality of layers including a highly elastic member layer. And it has the layer whose tensile elastic modulus is 1 GPa or more and the layer whose tensile elastic modulus is less than 1 GPa.

  The elastic base material layer provided on the meandering prevention guide tape of the present invention has an elastic base material and is a main member that abuts against a side surface portion of a roller that suspends the seamless belt and functions to prevent the seamless belt from meandering. Is. As an elastic base material which shape | molds an elastic base material layer, it can shape | mold with elastomers, such as a synthetic rubber, natural rubber, and resin. Specific examples of the elastic substrate include silicon rubber, urethane rubber, fluororubber, and thermoplastic elastomer having a JIS-A hardness of 60 to 90 °. Of these, urethane rubber is preferred because of its excellent anti-sliding property in terms of a meandering prevention mechanism and excellent ozone resistance when applied to an image forming apparatus.

  The thickness of the elastic base material layer is preferably 0.1 to 1.5 mm. If the thickness is 0.1 mm or more, the meandering prevention function can be sufficiently exhibited. If it is 1.5 mm or less, generation | occurrence | production of the stress distortion by the difference of the curvature radius of the outer peripheral surface of an elastic base material and an internal peripheral surface becoming excessive in a bending part can be suppressed. Furthermore, the concentration of stress between the seamless belt and the meandering prevention guide tape can be suppressed, and the breakage of the seamless belt and the breakage (peeling) of the adhesive layer can be suppressed.

  The adhesive layer provided on one surface of the elastic base material layer is preferably formed of a material that is provided for adhering the meander-preventing guide tape to the seamless belt and that does not change the adhesive force depending on the environmental temperature and humidity. In particular, an adhesive force that can be used as an intermediate transfer belt, a transfer conveyance belt, or the like of an image forming apparatus is necessary, and it is preferable that the adhesive force does not peel from a seamless belt even in a low-temperature and low-humidity atmosphere. Specifically, the 90 ° peel peel strength between the meandering prevention guide tape and the seamless belt is preferably 2 N / 5 mm or more.

  As the adhesive used for the adhesive layer, any of an acrylic adhesive, a silicone adhesive, a hot melt adhesive, and the like can be used. An acrylic pressure-sensitive adhesive having tackiness is preferred from the viewpoint of stable high adhesive strength, easy handling at the time of application, and low cost.

  Moreover, it is preferable to arrange | position the member which has many space | gaps, such as a nonwoven fabric, in a contact bonding layer. By disposing the nonwoven fabric in the adhesive layer, the adhesive is held in the voids of the nonwoven fabric, and the cohesive failure in the adhesive layer is greatly reduced by the anchor effect.

  The release material layer provided on the meandering prevention guide tape of the present invention has a function of protecting the adhesive layer. The release material layer is removed when the meandering prevention guide tape is bonded to the seamless belt by the adhesive layer. The material may be paper or a resin sheet, and the thickness may be any material that can protect the adhesive layer until it adheres to the seamless belt.

  The high-elasticity member layer provided in the meandering prevention guide tape of the present invention has a tensile elastic modulus of 1 GPa or more. When the meandering prevention guide tape is bonded to a seamless belt, the tape is prevented from stretching, and the meandering prevention guide tape Are easily adhered. It is preferable that the highly elastic member layer is disposed on the surface side different from the adhesive layer with respect to the elastic base material layer, and is peeled after the meandering prevention guide tape is bonded to the seamless belt. As a result, the meandering prevention guide tape bonded to the seamless belt can have flexibility with sufficient meandering prevention performance utilizing elastic deformation.

  The tensile elastic modulus of the high elastic member layer is 1 GPa or more. The tensile modulus can be measured by a method based on the method of JIS Z 0237 (the same applies hereinafter).

  As a material of the high elastic member of the high elastic member layer, various resin sheets, metal sheets, and the like may be used. The resin sheet may be stretched, and examples thereof include stretched polyester, polyimide, polyetherimide, nylon, and polypropylene. Of these, a stretched polyester sheet is preferred from the viewpoints of thermal stability and cost. The thickness of the resin sheet is preferably 10 to 100 μm. If it is 10 μm or more, stretching of the meandering prevention guide tape can be suppressed at the time of adhesion, and if it is 100 μm or less, generation of burrs or the like can be suppressed at the time of cutting in the production process of the meandering prevention guide tape.

  Examples of the metal sheet include a thin layer sheet of aluminum or nickel. The thickness of the metal sheet is preferably 5 to 50 μm. If a metal sheet is 5 micrometers or more, when peeling a highly elastic member layer from the meandering prevention guide tape adhere | attached on the seamless belt, a fracture | rupture of a metal sheet can be suppressed. Moreover, if it is 50 micrometers or less, the difficulty of the handling at the time of sticking to a seamless belt by rigidity will be avoided, and adhesion | attachment operation can be performed stably.

  The adhesive layer of the meander-preventing guide tape of the present invention is provided to facilitate peeling of the high-elasticity member layer from the meander-preventing guide tape after the meander-preventing guide tape is bonded to the inner peripheral surface of the seamless belt. It is preferable to have a stronger adhesive force to the higher elastic member layer than the lower layer so that the high elastic member layer can be peeled off without damaging the layer bonded on the seamless belt. Specifically, the adhesive layer has a peeling force in the 180 ° direction of 0.5 N / 5 mm or less with respect to the lower layer, and a peeling force in the 180 ° direction of 1.5 N / 5 mm or more with respect to the high elastic member layer. It is preferable to have. When the high-elasticity member layer is peeled off because the pressure-sensitive adhesive layer has such a peeling force, the pressure-sensitive adhesive layer is integrally bonded to the high-elasticity member layer and peeled between the lower layer and the lower layer. The highly elastic member layer can be removed without damaging the substrate. When the adhesive layer has a peeling force in the direction of 180 ° of 0.5 N / 5 mm or less with respect to the lower layer, it is possible to suppress the adhesive layer from remaining in the lower layer and easily peel the high elastic member layer together with the adhesive layer. it can. The adhesive layer has a peeling force in the 180 ° direction of 1.5 N / 5 mm or more with respect to the highly elastic member layer, thereby suppressing cohesive failure in the adhesive layer and suppressing the adhesive layer from remaining in the lower layer and being stable. Then, the highly elastic member layer can be peeled off together with the adhesive layer.

  The adhesive layer can be easily peeled off together with the highly elastic member layer by subjecting the surface of the highly elastic member layer that comes into contact with the adhesive layer to a surface treatment that enhances the adhesive strength of a silane coupling agent or the like.

  The pressure-sensitive adhesive layer preferably contains a pressure-sensitive pressure-sensitive adhesive. Specific examples include a synthetic rubber adhesive, an acrylic adhesive, and a silicone adhesive to which a tackifier is added. Of these, a copolymer of isooctyl acrylate and acrylic acid is preferred. Moreover, base materials, such as a resin sheet, can also be arrange | positioned in an adhesion layer.

  The meander-preventing guide tape of the present invention may have a layer having another function, for example, a layer made of a resin sheet, as long as the function of the layer is not impaired. As the configuration of the meandering prevention guide tape of the present invention, for example, release material layer / adhesive layer / elastic base material layer / adhesive layer / high elastic member layer, release material layer / adhesive layer (nonwoven fabric arrangement) / elastic base material layer / Adhesive layer / highly elastic member layer, release material layer / adhesive layer / elastic base material layer / adhesive layer / resin sheet layer / adhesive layer / high elastic member layer, release material layer / adhesive layer (nonwoven fabric arrangement) / elastic base material layer / Adhesive layer / resin sheet layer / adhesive layer / high elastic member layer and the like.

  In addition, the thickness of the meandering prevention guide tape of the present invention can be appropriately selected, and the width can be 3 to 6 mm.

  The seamless belt of the present invention is characterized in that the meandering prevention guide tape of the present invention is adhered. The meandering prevention guide tape may be bonded to any part of the seamless belt, but it is preferable that the meandering guide tape is bonded to both edges of the inner peripheral surface in the circumferential direction.

  Examples of the seamless belt include those formed of an elastomer such as synthetic rubber, natural rubber, or resin.

  Such a seamless belt can be applied to, for example, an intermediate transfer belt or a transfer conveyance belt used in an image forming apparatus.

  The method for producing a seamless belt of the present invention is characterized in that the adhesive layer is bonded to the seamless belt by pressing against the inner peripheral surface of the seamless belt while peeling the release material layer of the meandering prevention guide tape of the present invention.

  The meandering prevention guide tape may be seamless, but it is preferable to cut it in advance to the required length to be bonded to the seamless belt and use it as a tape with ends, because it is easy to manufacture.

  At the same time as peeling the peeling material layer of the meandering prevention guide tape, the exposed adhesive layer is pressed against the inner peripheral surface of the seamless belt to prevent dust and other foreign matter from adhering to the adhesive layer. A decrease in adhesive force can be prevented.

  Then, it is preferable to peel between the adhesive layer and lower layer of a meandering prevention guide tape, and to remove an upper layer from the adhesive layer containing a highly elastic member layer.

  Moreover, the method for producing the seamless belt of the present invention bonds the adhesive layer to the seamless belt by pressing against the inner peripheral surface of the seamless belt while peeling the release material layer of the meandering prevention guide tape of the present invention. At the same time, the adhesive layer is peeled between the adhesive layer and the lower layer of the meandering prevention guide tape, and the upper layer is removed from the adhesive layer.

  The upper layer is peeled from the adhesive layer including the highly elastic member layer of the meandering prevention guide tape, and the timing for removing the upper layer may be after the meandering prevention guide tape is adhered to the inner peripheral surface of the seamless belt or at the time of adhesion. In addition, it is preferable to perform adhesion of the adhesive layer and peeling between the adhesive layers at the same time. If the peeling of the release material layer, the adhesion of the adhesive layer, and the peeling between the adhesive layers are performed in parallel, the seamless belt can be manufactured in one step, and the seamless belt can be manufactured efficiently and inexpensively. it can.

Hereinafter, the meandering prevention guide tape of the present invention will be described in detail with reference to the drawings, but the technical scope of the present invention is not limited thereto.
[Example 1]
As shown in FIG. 1, an adhesive layer 35 and a release material layer 33 are provided on the lower side of the elastic base material layer 32 to protect the adhesive layer 35, and an adhesive layer 34 and an adhesive layer are provided on the upper side of the elastic base material layer 32. A highly elastic member layer 31 was provided on 34 to produce a meandering prevention guide tape. For the elastic base material layer 32, polyurethane rubber having a JIS-A hardness of 68 °, a thickness of 1.3 mm, and a width of 5 mm and having a rectangular cross section was used. For the adhesive layer 35, an acrylic pressure-sensitive adhesive having a thickness of 20 μm and a width of 5 mm (the same width as the elastic base material layer) was used. As the release material layer 33, one having a thickness of 50 μm and a width of 5 mm, one side of which was treated with fluorine. The pressure-sensitive adhesive layer 34 was an acrylic pressure-sensitive pressure-sensitive adhesive made of a copolymer of isooctyl acrylate and acrylic acid having a thickness of 40 μm and a width of 5 mm. For the highly elastic member layer 31, a stretched PET sheet having a thickness of 50 μm, a width of 5 mm, and a tensile elastic modulus of 1.6 GPa was used. The 180 ° peel force between the elastic base material layer 32 and the adhesive layer 34 was 0.38 N / 5 mm, and the 180 ° peel force between the highly elastic member layer 31 and the adhesive layer 34 was 1.87 N / 5 mm. .

The peel force was measured according to JIS Z0237.
[Example 2]
A meander-preventing guide tape was prepared in the same manner as in Example 1 except that an aluminum sheet having a thickness of 12 μm, a width of 5 mm, and a tensile elastic modulus of 70 GPa was used for the highly elastic member layer 31. A surface activation treatment using a xenon excimer lamp was performed on the surface of the aluminum sheet in contact with the adhesive layer immediately before adhering to the adhesive layer. The 180 ° peeling force between the highly elastic member layer 31 and the adhesive layer 34 was 1.51 N / 5 mm.
Example 3
As shown in FIG. 2, an adhesive layer 45 and a release material layer 43 are provided below the elastic base material layer 42, and an adhesive layer 44 is provided above the elastic base material layer 42, and a highly elastic member layer is provided on the adhesive layer 44. 41 was provided to produce a meandering prevention guide tape. As the elastic base material layer 42, a polyurethane rubber sheet having a JIS-A hardness of 70 ° and a thickness of 1.0 mm manufactured by Fuso Rubber Sangyo Co., Ltd. was cut into a width of 5 mm and a rectangular cross section was used. As the adhesive layer 45 and the release material layer 43, a double-sided adhesive tape No. 1 manufactured by Nitto Denko Corporation having a nonwoven fabric in an adhesive layer having a width of 5 mm is used. 5000 NS was used. The pressure-sensitive adhesive layer 44 is coated with an acrylic pressure-sensitive adhesive on both surfaces of the base material, and uses a pressure-sensitive adhesive tape consisting of a strong adhesive surface and a weakly adhesive surface (manufactured by Sumitomo 3M: double-sided tape 9415PC). The weak adhesive surface and the surface in contact with the highly elastic member layer 41 are arranged to be a strong adhesive surface. As the high elastic member layer 41, a thickness of 50 μm and a tensile elastic modulus of 3.5 GPa (manufactured by Toray Industries Inc .: biaxially stretched polyester sheet Luminer S10) were used. The 180 ° peel force between the elastic base layer 42 and the adhesive layer 44 (weakly sticky surface) is 0.43 N / 5 mm, and the 180 ° peel force between the highly elastic member layer 41 and the adhesive layer 44 is 2.1 N. / 5 mm.
Example 4
A method of manufacturing the seamless belt by sticking the meandering prevention guide tape obtained in Example 1 to the inner peripheral surface of the image forming seamless belt will be described. A seamless belt having a thickness of 120 μm and an inner peripheral length of 680 mm obtained by adding an ionic conductive agent to PVdF resin and molding by cylindrical extrusion molding was used. The meander-preventing guide tape having a length of 679.7 mm obtained in Example 1 was used.

  As shown in FIG. 3, the seamless belt 51 was stretched around a plurality of rollers, and was moved at a constant speed (20 mm / S) in the direction of 50A by a driving roller. The meander-preventing guide tape was conveyed at a constant speed (20 mm / S) so as to contact the inner peripheral surface of the seamless belt 51 from the direction of 50B. The release material layer 33 was peeled from the meandering prevention guide tape by the release material peeling member 52, exposing the adhesive layer 35, and contacting the inner peripheral surface of the seamless belt. At the same time, the meander prevention guide tape is applied to the inner peripheral surface of the side end of the seamless belt by the rubber pressing force member 56 and the resin pressing pressure backup member 53 disposed on the outer peripheral surface of the seamless belt from the inner periphery of the meander prevention guide tape. Pressure bonded. At this time, the pressing force of the pressing member 56 was 1 MPa, and the nip length of the pressing portion was 3 mm. After sticking the meandering prevention guide tape to the inner peripheral surface of the seamless belt, the gap between both ends of the meandering prevention guide was 0.3 mm. After sticking the meandering prevention guide tape to the seamless belt 51, the highly elastic member layer 31 was gripped and peeled from the elastic base material layer 32. At this time, the pressure-sensitive adhesive layer 34 could be peeled off while being adhered to the highly elastic member layer 31 side, and the seamless belt 61, the elastic base material layer 32, and the adhesive layer 35 were not damaged.

It can be seen that when the high elastic member layer has a tensile elastic modulus of 1 GPa or more, the meandering prevention guide tape is not stretched and can be stably adhered to the inner peripheral surface of the seamless belt. Furthermore, it was found that the meandering prevention function can be stably obtained in the seamless belt by peeling the high-elasticity member layer after adhering the meandering prevention guide tape to the inner peripheral surface of the seamless belt. Further, the peel force in the 180 ° direction at the interface between the elastic base material layer and the adhesive layer is 0.5 N / 5 mm or less, and the peel force in the 180 ° direction at the interface between the highly elastic member layer and the adhesive layer is 1.5 N / 5 mm. By the above, it turned out that it can peel, without damaging a seamless belt and an elastic base material layer. Furthermore, it turned out that it can peel in the state in which the adhesion layer was adhered to the high elastic modulus member side.
Example 5
Carbon black was added to ETFE resin (ethylene tetrafluoroethylene copolymer resin), and a seamless belt having a thickness of 100 μm and an inner peripheral length of 680 mm was used by cylindrical extrusion molding. The meander-preventing guide tape having a length of 679.7 mm obtained in Example 3 was used.

As shown in FIG. 5, the seamless belt 71 was stretched around a plurality of rollers, and was moved at a constant speed of 20 mm / s in the direction of 70A by a driving roller. The meander-preventing guide tape was conveyed at a constant speed of 20 mm / s so as to contact the inner peripheral surface of the seamless belt 71 from the direction of 70B. The release material layer 43 was peeled from the meandering prevention guide tape by the release paper peeling member 72, the adhesive layer 45 was exposed, and contacted with the inner peripheral surface of the seamless belt 71. At the same time, the meandering prevention guide tape is inserted into the inner peripheral surface of the side end of the seamless belt 71 by the rubber pressing force member 76 and the resin pressure backup member 73 disposed on the outer peripheral surface of the seamless belt from the inner circumference of the meandering prevention guide tape. And pressure bonded. At this time, the pressing force of the pressing member 76 was 1 MPa, and the nip length of the pressing portion was 3 mm. A highly elastic member peeling member 79 was disposed on the downstream side of the pressing portion, a prevention guide tape was adhered to the inner peripheral surface of the seamless belt 71, and the high elasticity member layer 41 was peeled together with the adhesive layer 44 at the same time. The gap between both ends of the meandering prevention guide was 0.3 mm. Moreover, since the peeling force between the elastic base material layer and the adhesive layer was small, the elastic base material layer and the adhesive layer were peeled off, and the high elastic member layer could be peeled stably together with the adhesive layer. A seamless belt with a meander-preventing guide tape having only an elastic substrate layer was obtained in one step.
(Comparative Example 1)
A meandering-preventing guide tape having an adhesive layer 82 and an elastic base material layer 83 was produced in the same manner as in Example 4 except that the adhesive layer and the highly elastic member layer were not provided, and this was seamlessly conducted in the same manner as in Example 4. Adhered to the inner peripheral surface of the belt 81 side end. As shown in FIG. 8, both ends of the meandering prevention guide tape overlap each other. It was found that the elastic base material layer 83 and the adhesive layer 82 of the meandering prevention guide tape were stretched during the bonding. When this meandering prevention guide tape was affixed several times under these conditions, it was found that the distance between both ends of the meandering prevention guide tape overlapped in the range of 0 to 1.5 mm. Because it does not have a highly elastic member layer, the elastic member layer is stretched by the pressing force of the pressing part and cannot be stably bonded, and the position of both edges of the seamless belt is adjusted after bonding the meandering prevention guide tape In addition, processing such as cutting of the meandering prevention guide tape is necessary. Further, the outer peripheral length of the meandering prevention guide tape is different from the length of the inner circumference of the seamless belt, and the side end face of the seamless belt is always stress-strained by the meandering prevention guide tape, which causes a breakage.

  The meandering prevention guide tape of the present invention prevents the meandering stably in the seamless belt. Adhesion on the seamless belt can be performed simply, stably and at low cost.

It is a schematic block diagram which shows an example of the meander prevention guide tape of this invention. It is a schematic block diagram which shows an example of the meander prevention guide tape of this invention. It is explanatory drawing which shows the manufacturing method of the seamless belt of this invention. It is explanatory drawing which shows the manufacturing method of the seamless belt of this invention. It is explanatory drawing which shows the manufacturing method of the seamless belt of this invention. 1 is a schematic configuration diagram illustrating an image forming apparatus to which a seamless belt of the present invention is applied. It is a figure which shows the conventional meander prevention guide tape. It is a figure which shows the conventional meander prevention guide tape.

Explanation of symbols

100: electrostatic latent image unit 101: photosensitive drum 102: charging charger 103: optical writing device 104: developing device 105: toner 106: intermediate transfer belt 107: driving rollers 108, 109, 110, 203: driven roller
110: Secondary transfer counter rollers 111A, 111B, 111C, 111D Primary transfer roller 112: Secondary transfer roller 113: Transfer material 114: Cleaning blade 115: Waste toner box 51, 61, 71, 81, 201: Seamless belt 202: Meander prevention guide 204: Flange members 31, 41: High elastic member layers 32, 42, 83: Elastic base material layers 33, 43: Release material layers 34, 44: Adhesive layers 35, 45, 82: Adhesive layers 52, 72: Release paper peeling members 53 and 73: Pressing pressure backup members 56 and 76: Pressing pressure member 79: High elastic modulus member peeling member

Claims (11)

  In a meander-preventing guide tape that is provided on a seamless belt and prevents meandering, an elastic base material layer, an adhesive layer provided on one surface side of the elastic base material layer, a release material layer that protects the adhesive layer, A plurality of layers including a highly elastic member layer provided on the other surface side of the elastic base material layer via an adhesive layer, the high elastic member layer having a tensile elastic modulus of 1 GPa or more, and an elastic base material layer Has a tensile elastic modulus of less than 1 GPa.   The meander-preventing guide tape according to claim 1, wherein the adhesive layer has a stronger adhesive force to the highly elastic member layer than the lower layer.   The adhesive layer has a peeling force in a 180 ° direction of 0.5 N / 5 mm or less with respect to the lower layer, and a peeling force in a 180 ° direction of 1.5 N / 5 mm or more with respect to the highly elastic member layer. The meander-preventing guide tape according to claim 2.   The meandering-preventing guide tape according to any one of claims 1 to 3, wherein the adhesive layer contains a pressure-sensitive adhesive.   The meandering prevention guide tape according to any one of claims 1 to 4, wherein the highly elastic member layer comprises a resin layer.   The meandering prevention guide tape according to claim 1, wherein the highly elastic member layer is made of a metal layer.   A seamless belt to which the meandering prevention guide tape according to claim 1 is adhered.   The seamless belt according to claim 7, wherein the seamless belt is used in an image forming apparatus.   It is a method of manufacturing the seamless belt of Claim 7 or 8, Comprising: It presses on the internal peripheral surface of a seamless belt, peeling off the peeling material layer of the meandering prevention guide tape in any one of Claims 1-6, and is an adhesive layer. A process for producing a seamless belt, characterized in that the above is adhered to a seamless belt.   The method for producing a seamless belt according to claim 9, wherein peeling is performed between the adhesive layer and the lower layer of the meandering prevention guide tape, and the upper layer is removed from the adhesive layer.   It is a method of manufacturing the seamless belt of Claim 7 or 8, Comprising: It presses on the internal peripheral surface of a seamless belt, peeling off the peeling material layer of the meandering prevention guide tape in any one of Claims 1-6, and is an adhesive layer. A method for producing a seamless belt, comprising: adhering to a seamless belt, simultaneously peeling between the adhesive layer and the lower layer of the meandering prevention guide tape, and removing the upper layer from the adhesive layer.

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