JP2009205160A - Seamless tubular belt and cylinder used for manufacturing the belt, and method for manufacturing tubular belt using the cylinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tubular belt that prevents a slip phenomenon and also prevents the physical properties of the belt from being adversely affected, to provide a cylinder that facilitates the manufacture of the tubular belt, and to provide a method for manufacturing the tubular belt. <P>SOLUTION: The seamless tubular belt is formed from at least one of the following materials: polyimide resin, polyamide resin and polystyrene resin, and has a volume resistance value of 10<SP>8</SP>to 10<SP>13</SP>Ωcm. The belt includes a guide member integrally formed on a predetermined part of its internal circumferential face along the rotating direction. The cylinder for the tubular belt is a cylindrical structural body that has a peripheral face whose upper and lower sides are parallel to each other with respect to a transverse as a reference and has different outside diameters. The tubular belt is manufactured by: disposing the guide member on the small diameter part of the cylinder or applying a resin for guide member formation onto the small diameter part; then applying a resin for tubular belt formation onto peripheral face of the cylinder; and curing the applied resin. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seamless tubular belt used for electronic equipment and the like, a cylinder used for the production thereof, and a method for producing a tubular belt using the same.

  Generally, tubular belts are used in electronic devices such as copiers, laser beam printers, facsimiles, etc., and are used for fixing or transferring toner images formed on copy paper or transfer paper. Used as a belt.

  In order to be used as such a fixing belt, intermediate transfer belt, or transfer belt, it has a stain resistance, heat resistance, heat dissipation, elastic modulus, static elimination, durability, water repellency, oil repellency, and antistatic properties. Must be excellent.

  In particular, it is required to have an appropriate body resistance value for the function of transferring the toner of the tubular belt, but when the body resistance value is higher or lower than the required body resistance value, these antistatic properties, transfer properties, image properties, The physical properties such as releasability and stain resistance may be deteriorated, resulting in a fatal defect of image defects.

  When such a tubular belt is attached to an electronic device, the roller contacts the inside of the tubular belt to rotate the tubular belt within the electronic device. As a result, a slip phenomenon may occur, and the roller that rotates while being in contact with the both ends of the tubular belt may not match and may rotate out of the initial position. If such a slip phenomenon occurs, it may not be possible to transfer a toner to a predetermined position in the process of repeatedly transferring toners of a plurality of hues, and a normal image may not be provided. Development in which the medium is wound may also occur.

  Therefore, in order to prevent such a slip phenomenon, a method of attaching a guide member such as a guide rail to the tubular belt is generally used.

  However, existing tubular belt manufacturing methods, for example, roll coating that obtains a tubular belt by applying a polymer resin to the outer peripheral surface of a cylindrical cylinder and then performing a heat treatment such as drying to remove the polymer resin from the cylinder. Method, after applying a polymer resin to the inner surface of a cylindrical cylinder, heat treatment such as drying, and then removing the polymer resin from the cylinder to obtain a tubular belt, or a molten polymer through a circular die In an extrusion method or the like in which a tubular belt is obtained by extruding a resin, another step of attaching the guide member after the production of the tubular belt is required.

  Further, since the problem that the tubular belt driven by the rotating body meanders in the printing apparatus can be prevented only when the guide rail is positioned with high accuracy, high accuracy of the guide rail attaching device is required, and the guide High adhesive strength is required for the adhesive that attaches the tubular belt and guide rail in order to prevent the problem of rail disengagement, but there are two types because the material of the guide rail material is different from that of the polyurethane material. It is not easy to find an adhesive that satisfies the adhesive force to the material at the same time, and two or more kinds of adhesives or adhesive tapes may be used.

  Therefore, it is required to simplify the manufacturing process of the tubular belt on which the guide member is formed, and to minimize the use of expensive adhesive.

  In addition, when the guide member has a seam, the mechanical strength of the seam portion is different from the mechanical strength of other portions, and the seam portion can be broken. Therefore, it is necessary that the guide member has no seam. . In order to attach a seamless guide member, there is a problem that it cannot be easily achieved, for example, it is required that the tubular belt and the guide member have high dimensional accuracy.

  Accordingly, the present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a seamless tubular belt in which guide members are integrally formed.

  Another object of the present invention is to provide a tubular belt in which not only the tubular belt but also the guide member is seamless.

  Still another object of the present invention is to provide a cylinder that includes a guide member integrally and is capable of manufacturing a seamless tubular belt.

  Still another object of the present invention is to provide a method of manufacturing a seamless tubular belt in which a seamless guide member is integrally formed.

In order to achieve the above object, according to a first preferred embodiment of the present invention, the body resistance value is 10 or more selected from polyimide resin, polyamide resin and polystyrene resin. Provided is a tubular belt having a seam of ⁸ to 10 ¹³ Ωcm and including a guide member integrally formed along a rotational direction at a predetermined position on an inner peripheral surface.

  In the above embodiment, the guide member may be seamless.

  In the above embodiment, the guide member may be formed of the same material as the tubular belt.

  In the embodiment, the guide member may be formed of a material different from that of the tubular belt.

  In the above embodiment, the guide member is made of polyurethane resin, polyacrylonitrile-butadiene rubber (NBR), polysiloxane resin, phenoxy resin, natural rubber (NR), polystyrene butadiene rubber (SBR), chloroprene rubber (CR), butyl rubber ( IIR), at least one selected from ethylene-propylene rubber (EPDM) and chlorosulfonated polyethylene rubber (CSM).

  In the above embodiment, the guide member may have a 180 ° peel strength of 6 N / cm or more.

  In the above embodiment, at least one of the tubular belt and the guide member may have a 5% pyrolysis start temperature measured by a thermogravimetric analyzer of 200 ° C. or higher.

  In the embodiment, at least one of the tubular belt and the guide member has a dimensional change rate of −1.0 to +1. After being left for 20 hours under conditions of a temperature of 85 ± 2 ° C. and a humidity of 85 RH%. It may be within 0%.

  In the above embodiment, the tubular belt may have a bending resistance of 500 times or more measured according to JIS C6471, 8.2.

  In the embodiment, the guide member may have a width of 2 to 20 mm and a thickness of 0.1 to 5 mm.

  According to a second preferred embodiment of the present invention, there is provided a tubular belt cylinder having a cylindrical structure having outer peripheral surfaces whose upper and lower surfaces are parallel with respect to a cross section, and including different outer diameter portions. provide.

  In the above embodiment, at least one groove portion is provided symmetrically on the upper and lower outer peripheral surfaces with respect to the cross section, and the groove portion may be formed in a ring shape on the outer peripheral surface.

  In the embodiment, a cylindrical structure having a first outer diameter with respect to the same central axis and a second outer diameter smaller than the first outer diameter and having the second outer diameter has the first outer diameter. It can project from a cylindrical structure.

  In the embodiment, the cylindrical structure may be a single structure having a plurality of outer diameters.

  In the embodiment, a plurality of detachable cylindrical structures can be included.

  In the embodiment, the plurality of cylindrical structures may include a fixing portion having an outer diameter different from the outer diameter of the structure.

  In the embodiment, the material of the cylinder may be at least one selected from aluminum, stainless steel, iron, copper, chromium, nickel, and a ceramic mixed material.

  In the embodiment, the tubular belt cylinder may further include a release layer on an outer peripheral surface.

  In the embodiment, the release layer may be made of a heat-resistant polymer resin material.

  According to a third preferred embodiment of the present invention, a step of applying a resin for forming a guide member to the small diameter portion of the cylinder, a step of applying a resin for forming a tubular belt to the outer peripheral surface of the cylinder, and A method for producing a tubular belt, comprising: curing an applied resin.

  According to a fourth preferred embodiment of the present invention, the step of disposing a guide member in the small diameter portion of the cylinder, the step of applying a resin for forming a tubular belt to the outer peripheral surface of the cylinder, and the applied resin A method of manufacturing a tubular belt, comprising:

  The present invention can provide a tubular belt that includes a guide member to prevent a slip phenomenon and does not negatively affect the physical properties of the belt.

  In addition, the present invention can provide a cylinder capable of manufacturing a seamless tubular belt integrally including a guide member.

  In addition, the present invention can provide a method of manufacturing a tubular belt that can easily form a guide member that prevents a slip phenomenon.

  In addition, the present invention can provide a tubular belt in which not only the tubular belt but also the guide member has no seam, and a manufacturing method thereof.

1 is a longitudinal section showing a state in which a tubular belt according to a preferred embodiment of the present invention is mounted on a roller. FIG. 2 is a front sectional view showing a state in which a tubular belt according to a preferred embodiment of the present invention is attached to a roller when viewed along line I in FIG. 1. FIG. 3 is a front sectional view showing a state in which a tubular belt according to another preferred embodiment of the present invention is attached to a roller when viewed along an I line in FIG. 1. FIG. 2 is a front sectional view showing a state in which a tubular belt according to a preferred embodiment of the present invention is attached to a roller when viewed along line I in FIG. 1. FIG. 3 is a front sectional view showing a state in which a tubular belt according to another preferred embodiment of the present invention is attached to a roller when viewed along an I line in FIG. 1. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a cylinder according to a preferred embodiment of the present invention, in which (a) is a state in which a guide member and a resin for a tubular belt are applied with one kind of resin, It is a figure which shows the state apply | coated with resin of. FIG. 5 is a cross-sectional view of a cylinder according to another preferred embodiment of the present invention, in which (a) shows a state in which a guide member and a resin for a tubular belt are applied with one kind of resin, and (b) shows a guide member and a resin for a tubular belt It is a figure which shows the state apply | coated with different kind of resin. FIG. 5 is a cross-sectional view of a cylinder according to another preferred embodiment of the present invention, in which (a) shows a state in which a guide member and a resin for a tubular belt are applied with one kind of resin, and (b) shows a guide member and a resin for a tubular belt. It is a figure which shows the state apply | coated with different kind of resin. FIG. 4 is a cross-sectional view of a cylinder according to another preferred embodiment of the present invention, where (a) shows a state before the female cylinder and the male cylinder are coupled, and (b) shows a state where the female and male cylinders are coupled. FIG. It is a schematic diagram of the measuring method of peeling strength.

DESCRIPTION OF SYMBOLS 10 Tubular belt 11 Inner peripheral surface 15 Guide member 20 Roller 21 Outer peripheral surface 25 Groove 30 Female cylinder 31 Male cylinder 32 Cylinder 33 Male fixing part 34 Female fixing part 35 Groove part 40, 45 Resin

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

  FIG. 1 is a longitudinal sectional side view showing a state in which a tubular belt according to a preferred embodiment of the present invention is attached to a roller, and FIG. 2 shows a state in which the tubular belt according to a preferred embodiment of the present invention is attached to a roller. 3 to 5 are front sectional views showing a state in which a tubular belt according to another preferred embodiment of the present invention is mounted on a roller, and is cut along the I line. is there.

  6 is a cross-sectional view showing a state in which a tubular belt manufacturing resin is applied to a cylinder according to a preferred embodiment of the present invention, and FIGS. 7 to 8 are tubular views of the cylinder according to another preferred embodiment of the present invention. It is a cross-sectional view which shows the state which apply | coated the resin for belt manufacture, Comprising: (a) is the state which apply | coated the resin for guide members and tubular belts with 1 type of resin, (b) is the resin for guide members and tubular belts. FIG. 9 is a cross-sectional view of a cylinder according to another preferred embodiment of the present invention, wherein FIG. 9 is a cross-sectional view of a cylinder before the female cylinder and the male cylinder are combined. State (b) is a view showing a state in which a female cylinder and a male cylinder are combined.

  In the drawings, the same reference numerals are given to the same components for convenience, but this does not mean that the composition and form are the same.

  In the tubular belt 10 of the present invention, a guide member 15 is formed at a predetermined position on the inner peripheral surface 11 in the direction in which the tubular belt 10 rotates.

  The tubular belt 10 of the present invention having the guide member 15 meshes with the roller 20 and rotates. The roller 20 may be provided with a groove 25 having a size that allows the guide member 15 to be inserted and meshed with the portion of the tubular belt 10 where the guide member 15 is formed. Accordingly, since the guide member 15 of the tubular belt 10 continuously rubs against the roller 20 or the groove 25 of the roller 20 while the tubular belt 10 and the roller 20 are engaged and rotating, the durability of the guide member 15 is taken into consideration. Thus, a guide rail and a tubular belt having a 180 ° peel strength of 6 N / cm or more can be used.

  The tubular belt 10 provided by the present invention may be one in which the guide member 15 and the tubular belt 10 are integrally formed. In this specification, the term “integrated” or “integrated” does not include another adhesive layer for bonding the guide member 15 and the tubular belt 10, and the guide member 15 and the tubular belt member are This means that the guide member 15 is directly bonded, and similarly, the 180 ° peel strength between the guide member 15 and the tubular belt 10 may be 6 N / cm or more in consideration of the durability of the guide member 15.

  Further, the guide member 15 may be provided with no seam. In the existing guide member 15 having a seam, not only the tubular belt 10 can be broken at the joint portion, but also a failure in which the guide member 15 is detached from the tubular belt 10 may occur.

  On the other hand, the guide member 15 has a 5% pyrolysis temperature of 200 ° C. or higher measured by a thermogravimetric analyzer (TGA) so that it can withstand high heat of 200 ° C. or higher generated from another fixing unit used in a laser printer. It may be. If the 5% thermal decomposition temperature is less than 200 ° C., the durability is lowered by the heat transmitted from the fixing unit using high heat of about 250 ° C. adjacent to the parts of the printing apparatus where the product according to the present invention is used. There is.

  The tubular belt 10 and the guide member 15 are required to have dimensional safety so that they can operate without errors in various environments. That is, the dimensional change rates in the thickness direction, the longitudinal direction and the width direction before and after standing for 20 hours under conditions of a temperature of 85 ± 2 ° C. and a humidity of 85 RH% are within −1.0 to + 1.0%, respectively. There may be. When the rate of dimensional change is less than -1.0% to + 1.0% or more, it is sensitive to changes in the external environment, and therefore malfunctions such as malfunction of the image printing device or meandering, breaking, and image shift phenomenon of the tubular belt 10 May cause.

  Further, the guide member 15 and the tubular belt 10 are required to have durability against physical force such as continuous friction with the roller 20. Preferably, the durability of the tubular belt 10 may be superior to the durability of the guide member 15. If the tubular belt 10 is less durable than the guide member 15 and is damaged earlier during use, the surface of the photosensitive (OPC) drum that engages and operates in the image printing apparatus may be damaged, resulting in an increase in recovery costs. There is.

  In consideration of the life of the tubular belt 10 including the guide member 15 of the present invention, the bending resistance measured according to JIS C6471, 8.2 may be 500 times or more, more preferably JIS C6471, The bending resistance measured according to 8.2 may be 1,500 times or more. Specifically, after obtaining a specimen from which the guide member 15 is removed from the tubular belt 10, the bending resistance measured according to JIS C6471, 8.2 may be 1,000 times or more. No. 15 may have a flex resistance measured in accordance with JIS C6471, 8.2 of 500 times or more.

  The tubular belt 10 and the guide member 15 of the present invention described above can be made of the same kind of resin or can be made of different kinds of resins.

  The tubular belt 10 can be manufactured from a thermoplastic resin or a thermosetting resin, and preferably includes at least one selected from a polyamide resin, a polyimide resin, and a polystyrene resin. Polyimide resin is suitable in terms of durability and durability. Polyimide resins have the advantages of excellent thermal stability and excellent mechanical and electrical properties, while having a high glass transition temperature, there are many limitations in processing, and relatively easy charging properties. The body resistance value is higher than the resistance value required for the tubular belt 10. Therefore, it is preferable to mix the conductive filler, and after mixing the conductive filler in the solvent, more dispersing agent can be added for dispersion safety.

  The guide member 15 may be formed of the same type as the tubular belt 10 or may be formed of a different material. As shown in FIG.4 and FIG.5, when it forms with a dissimilar material, as a material which forms the guide member 15, these are not necessarily limited, It is applicable if it is a flexible material, Preferably, polyurethane resin, polyacrylonitrile-butadiene rubber (NBR), polysiloxane resin, phenoxy resin, natural rubber (NR), polystyrene butadiene rubber (SBR), chloroprene rubber (CR), butyl rubber (IIR), ethylene-propylene rubber (EPDM) and at least one selected from chlorosulfonated polyethylene rubber (CSM) can be used. In this case, since the guide member 15 and the tubular belt 10 are firmly fixed while undergoing a curing process in the manufacturing process, it is not necessary to form another adhesive layer, so the problem caused by the adhesive forming the adhesive layer is fundamental. The guide member can be formed at an accurate position without a complicated process, and if necessary, a seamless guide member can be formed at an accurate position while eliminating problems caused by the adhesive. Can do.

  In order to manufacture the tubular belt 10 described above, the material for forming the guide member 15 and the material for manufacturing the tubular belt 10 are applied to the outer peripheral surfaces of the cylinders 30, 31, and 32 and cured, It can be manufactured by desorbing 31 and 32.

  The cylinder that can be used when manufacturing the tubular belt 10 of the present invention is a cylindrical structure having outer peripheral surfaces whose upper and lower surfaces are parallel when the cross section is taken as a reference, and have different outer diameters. It may have. Further, when the cross section is taken as a reference, at least one groove portion is provided symmetrically on the upper and lower outer peripheral surfaces, and the groove portion can be formed in a ring shape on the outer peripheral surface. A cylindrical structure having a first outer diameter and a second outer diameter smaller than the first outer diameter with respect to the same central axis is a cylindrical structure having the first outer diameter. It can also be a projecting from.

  More specifically, as shown in FIGS. 6, 7 and 9, it may be composed of two or more cylindrical cylinders 30 and 31 which can be attached or detached, or FIG. As shown, it may consist of a single cylindrical cylinder 32. Hereinafter, in the present invention, the “small diameter portion” indicates a position where the guide member 15 is formed unless otherwise specified.

  According to one embodiment of the present invention, in the case of two or more detachable cylinders 30 and 31, each of the male and female cylinders 30 and 31 can be assembled detachably. More specifically, referring to FIG. 9, the female cylinder 30 and the male cylinder 31 include a female fixing portion 34 and a male fixing portion 33, respectively, and can be fixed by fitting them. The portions to which the male and female fixing portions 33 and 34 are fitted and fixed may have inclination angles corresponding to each other. At this time, the outer diameter of the male fixing portion 33 is smaller than the outer diameter of the male cylinder 31, and the outer diameters of the male cylinder 31 and the female cylinder 30 may be the same. After the male and female cylinders 30 and 31 are joined together, the length (m) of the male and female part 33 is determined so that the male and female cylinders 30 and 31 are firmly fixed without floating after being inserted into the female fastening part 34. The total length of the cylinder can be 5 to 40%. Further, the length (n) of the female settlement portion 34 is equal to the length (m) of the male settlement portion 33 so that the male and female cylinders 30 and 31 are firmly fixed without floating after being inserted into the female settlement portion 34. You may make it be 5 to 40%. The total length of the cylinder for forming the tubular belt 10, that is, the total length of the coupled state after the male and female cylinders 30, 31 are not particularly limited, but may be 200 to 2500 mm. The length (m) of the male fixing portion 33 is longer than the length (n) of the female fixing portion 34, and the groove portion 35, which is a small diameter portion, is formed after being coupled and fixed to each other. The size of the groove 35 is set in consideration of the height and width of the guide member 15 to be formed, and the length (m, n) and the outer diameter of the male and female fixing portions 33 and 34 are determined based on this. Can be set. The height and width of the guide member 15 are not particularly limited. However, considering that the area of the tubular belt 10 is limited and the thickness of the drive roller is limited, the width is 2 to 20 mm and the height is high. The groove portion 35 may have a width of 2 to 20 mm and a height of 0.1 to 5 mm.

  According to another embodiment of the present invention, a single cylinder for the tubular belt 10 can be constructed (FIG. 8). In this case, the cylinder 32 itself may include portions having different outer diameters. That is, the first outer diameter with the same central axis as a reference and the second outer diameter smaller than the first outer diameter, and the position and width of the guide member 15 to be formed have a second outer diameter with a smaller outer diameter. Can be formed. At this time, the width (p) of the portion having the second outer diameter and the difference (q) between the first outer diameter and the second outer diameter can be set in consideration of the height and width of the guide member 15. This is the same as described for the width and height of the groove 35 described in the case of two or more cylinders.

  The position where the guide member 15 is to be formed is not particularly limited, and the guide member 15 may be formed at any position as long as it can prevent the slip phenomenon that occurs when the finally manufactured tubular belt 10 rotates. I can. That is, the guide member 15 can be formed at a constant interval from the side end of the tubular belt 10, can be formed in contact with the side end, or can be formed in the central portion. . A plurality of guide members 15 may be formed. Preferably, the guide member 15 starts at a point of 10 mm or less from the side end of the tubular belt 10 and can be present on one side or both sides.

  Therefore, the position at which the small diameter portion is formed in the cylinders 30, 31, and 32 is not particularly limited, and can be formed in contact with the side ends of the cylinders 30, 31, 32, or at regular intervals from the side ends. The cylinders 30, 31, and 32 can also be formed separately from each other. Also, a plurality can be formed. Preferably, a small diameter portion for forming the guide member 15 can be formed at a point of 10 mm or less from the side ends of the cylinders 30, 31, 32.

  The cylinders 30, 31 and 32 may be made of aluminum, stainless steel, iron, copper, chromium, nickel, ceramic mixed materials, or the like alone or in combination. Moreover, in order to improve a mold release property, a mold release layer can be provided in an outer peripheral surface. The release layer is not particularly limited as long as it is a heat-resistant material, and examples thereof include silicon and heat-resistant composite Teflon (registered trademark) without limitation.

  When manufacturing the tubular belt 10 and the guide member 15 with different types of resins, a step of applying a resin for forming the guide member 15 to the small diameter portions of the cylinders 30, 31, 32, It can be manufactured by applying a resin to the outer peripheral surfaces of the cylinders 30, 31, and 32 and curing the applied resin. That is, the resin for forming the guide member 15 is filled in the small diameter portion and dried or radiused, and then the resin for forming the tubular belt 10 is applied to the outer peripheral surfaces of the cylinders 30, 31, and 32 and cured. be able to. Accordingly, even if different types of resins are used for manufacturing the tubular belt 10 and the guide member 15, they are firmly fixed to each other through the curing process, and therefore, sufficient adhesion strength can be exhibited without using another adhesive. .

  Meanwhile, the step of disposing the guide member 15 in the small diameter part of the cylinders 30, 31, 32, the step of applying the resin for forming the tubular belt 10 to the outer peripheral surfaces of the cylinders 30, 31, 32, It can also be produced by including a step of curing the resin. In particular, the production of the tubular belt 10 by arranging another guide member 15, for example, an O-ring, may be more useful when applied to the case where two cylinders 30 and 31 are used. That is, the tubular belt 10 can be manufactured by fixing a seamless O-ring so as to contact both the male and female cylinders 30 and 31 and then applying a resin to the outer peripheral surface of the cylinder. This can improve the productivity by reducing the drying or radiusing time after filling the resin with a small diameter portion for forming the guide member 15, and the seamless guide member is formed integrally. A tubular belt can be produced efficiently.

  When two or more cylinders 30 and 31 are used in manufacturing the tubular belt 10 using the cylinder of the present invention, the male and female fixing portions 33 and 34 are fixed while the central axes of the cylinders 30 and 31 are matched. Then, after the resin for the tubular belt 10 is applied and cured at a desired thickness along the outer peripheral surface of the cylinders 30 and 31, the male cylinder 31 is pulled out and then the female cylinder 30 is pulled out. A plurality of cylinders 30 and 31 can be removed in the reverse order.

  After the curing of the resin is completed, the cylinders 30 and 31 can be removed and cut and used so as to have the width and position of the guide member 15 to be formed. For example, the tubular belt 10 in which the guide member 15 is formed at a desired position can be provided by cutting along the line A or the line B in FIG. Moreover, the tubular belt 10 in which the guide member 15 is integrally formed can be provided by cutting the tubular belt 10 into a desired size. The manufactured tubular belt 10 may have a thickness of 40 to 200 μm.

  The method for manufacturing the tubular belt 10 will be described based on the use of polyimide resin. When the conductive filler and additive are further added, the additive is dispersed in a solvent, diamine and dianhydride are added thereto, and the polyamic acid solution containing the conductive filler is added at 0 to 30 ° C. for 30 minutes to 12 minutes. Produced by reacting for a period of time. Alternatively, the conductive filler and additive may be added after the polyamic acid solution is manufactured.

  The diamine and dianhydride are not particularly limited as long as they are used when the polyimide resin is produced. Examples of diamines include oxydianiline (4,4′-Oxydianline, ODA), p-phenylenediamine (para-phenylenediamine, pPDA), m-phenylenediamine (meta-phenylenediamine, mPDA), p-methylenediamine. (Para-methylene diamine, pMDA), m-methylene diamine (meta-methyl diamine, mMDA), oxyphenylene diamine (4,4′-oxyphenylene diamine, OPDA), etc. can be used, and as the dianhydride, Pyromellitic acid dianhydride (1,2,4,5-benzenetetracarboxylic dianhydride, PMD ), Benzophenone dianhydride (3,3 ′, 4,4′-Benzophenonetetracarboxylic dianhydride, BTDA), biphenyl dianhydride (3,3 ′, 4,4′-Biphenyltetracarboxylic dianhydride, PD) -Oxydiphthalmic anhydride (ODPA) can be used, but is not limited thereto. Usually, the diamine and dianhydride can be used in the same molar amount in a molar ratio of 1: 0.99 to 0.99: 1.

  As described above, in the case of the cylinders 30 and 31 in which the groove portion 35 is formed, the manufactured polyamic acid solution is different from each other in the outer diameter because the groove portion 35 and the outer peripheral surface are not formed. In the case of the cylinders 30, 31, and 32 including portions having different outer diameters, it can be applied to the entire outer peripheral surface. Alternatively, an O-ring can be used for the portion where the guide member 15 is formed, and different types of resins can be used.

  Thus, after apply | coating a polyamic-acid solution, it imidizes by heat processing. 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, thereby removing primarily the solvent and moisture remaining on the surface. Thereafter, the maximum temperature is raised to 250 to 400 ° C. while maintaining the rate of temperature increase of 1 to 10 ° C., then maintained for 10 minutes to 3 hours, and finally post-curing. The film-like tubular belt 10 having a solid phase can be produced by completely removing the solvent and water present on the surface and proceeding to imidization to complete the process.

The manufactured tubular belt 10 has an intermediate body resistance value in the range of 10 ⁸ to 10 ¹³ Ωcm, specifically 10 ⁹ to 10 ¹¹ , in order to provide excellent antistatic properties, static elimination properties, and printability. It preferably has a body resistance value of Ωcm. For this purpose, conductive fillers for adjusting the electric resistance of the tubular belt 10 include ketjen black, acetylene black, furnace black, and carbon nanotube (Carbon nanotube). ) Can be used in an amount of 0.1 to 20% by weight based on the total solute. This can further contain a metal filler and can be used in an amount of 0.1 to 5% by weight based on the total solute.

  In particular, ketjen black and multi-wall carbon nanotubes are a type of carbon black that can exhibit antistatic properties and semi-conductivity. Even if it is added, it exhibits excellent electrical characteristics and has a very low impurity content, so it is suitable for use in the present invention. On the other hand, the metal filler may be a material such as Dentall TM-200 in which antimony is doped (supported) with aluminum, nickel, silver, or mica, but is not limited thereto.

  As the solvent for dispersing the conductive filler, one or more non-protonic superpolar solvents such as N, N-dimethylformamide (DMF), dimethylacetamide (DMAc), N-methylpyrrolidinone (NMP) are selected. Can be used.

  Accordingly, the present invention makes the tubular belt 10 and the guide member 15 integral, that is, without using another adhesive for bonding the guide member 15 to the tubular belt 10, the guide member 15 and the tubular belt 10 member are directly connected. By providing a cylinder that can be manufactured by bonding, problems due to the use of an adhesive in manufacturing the tubular belt 10 can be fundamentally eliminated, and the tubular belt 10 can be easily manufactured. Therefore, the manufacturing process can be simplified.

  Further, the tubular belt 10 manufactured by the cylinder of the present invention and the guide member 15 formed thereon are seamless. As a result, it is possible to reduce defects such as the tubular belt 10 being broken at the joint or the guide member 15 being detached from the tubular belt 10.

  Accordingly, it is possible to provide the tubular belt 10 that can be used in electronic devices such as laser printers, facsimiles, and copiers having a semiconductive form with improved antistatic properties, static elimination properties, and printability.

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

<Example 1>
A 2 L 4-neck flask equipped with a mechanical stirrer, reflux condenser, and nitrogen inlet was mixed with 922.20 g of DMF and 6.5 g of Ketjen Black (KETJENBLACK EC 600 JD, manufactured by Ketjenblack, Japan), and then mixed with nitrogen. And then dispersed with an ultrasonic wave of 200 W and 40 kHz for 1 hour, 52.49 g of oxydianiline (manufactured by Wakayama, Japan) was dissolved in the flask, and 85.31 g of benzophenone dianhydride was added in three portions. Thus, semiconductive polyamic acid was produced.

  The produced semiconductive polyamic acid was a homogeneous black solution with a viscosity of 500 poise.

  A male cylinder having the same outer diameter as a cylindrical female cylinder having an outer diameter of 120 mm made of SUS 304 material was fixed as shown in FIG. After completion, a groove having a width of 4.1 mm and a depth of 1.5 mm was formed between both cylinders. By applying the manufactured semiconductive polyamic acid solution to the groove of the cylinder with a dispenser and drying with hot air at 120 ° C., the thickness of the dry semiconductive polyamic acid filled in the groove is reduced. The thickness was 1.5 mm, the same as the outer diameter height of the left and right cylinders, and then uniformly applied through the dispenser so that the outer peripheral surface of the cylinder was completely covered.

  Then, after pre-baking at 80 ° C. to remove primarily the solvent and moisture remaining on the belt surface, the temperature is raised to 350 ° C. while maintaining a temperature rising rate of 5 ° C. and maintained at 350 ° C. for 1 hour. Finally, post-curing was performed to completely remove the solvent and moisture remaining on the surface and inside, and then the cylinders were sequentially removed. The tubular belt was manufactured by cutting so that the tubular belt had a width of 238 mm with reference to the outside of the guide member. The manufactured tubular belt had a thickness of 65 μm, the width of the guide member was 4.0 mm, and the thickness was 1.3 mm.

<Example 2>
As shown in FIG. 7, a tubular belt was manufactured in the same manner as in Example 1 except that a female cylinder having an outer diameter of 120 mm and a male cylinder having an outer diameter of 118.5 mm were used.

<Example 3>
In the first embodiment, a seamless O-ring made of NBR (manufactured by Wimtech Co., Ltd., Korea) having a quadrangular cross section, a width of 4 mm, and a thickness of 1.5 mm is in contact with a female cylinder and a male cylinder having an outer diameter of 120 mm. A tubular belt was produced in the same manner except that the final post-curing temperature was 300 ° C.

<Example 4>
In Example 1, a seamless O-ring made of silicon rubber (made by Wimtech Co., Ltd., Korea) having a square cross section, a width of 4 mm, and a thickness of 1.5 mm is used for both a female cylinder and a male cylinder having an outer diameter of 120 mm. Tubular belts were produced in the same manner except that they were inserted in contact and the final post-curing temperature was 280 ° C.

<Example 5>
In the first embodiment, a seamless O-ring made of urethane rubber (manufactured by Jinsok Urethane Co., Ltd., Korea) having a square cross section, a width of 4 mm, and a thickness of 1.5 mm is used as a female cylinder and a male cylinder having an outer diameter of 120 mm. Tubular belts were produced in the same manner except that they were inserted together so that the final post-curing temperature was 250 ° C.

  During the manufacturing process, the guide member made of urethane rubber showed an increase in hardness.

<Example 6>
In Example 1, a male cylinder having the same outer diameter as a cylindrical female cylinder made of SUS 304 and having an outer diameter of 120 mm was fixed as shown in FIG. After completion, a tubular belt was manufactured in the same manner except that a groove having a width of 15 mm and a depth of 0.5 mm was formed between both cylinders.

<Example 7>
In the first embodiment, a groove having a width of 4.1 mm and a depth of 1.5 mm is formed between a cylinder and a male cylinder having the same outer diameter made of SUS 304 and having an outer diameter of 120 mm. Thus, as shown in FIG. 6, the cylinder groove is filled with a dimethylpolysiloxane material, one-pack type / room temperature curable type / heat-resistant silicone resin (RTV106, manufactured by Toyo Silicon Co., Ltd.). The tubular belt is formed in the same manner except that the polyamic acid resin is uniformly applied through a dispenser so that the outer diameter of the left and right cylinders is equal to the height of the left and right cylinders, and the outer peripheral surfaces of the cylinders are completely covered. Manufactured.

<Example 8>
In Example 7, 500 g of phenoxy resin (manufactured by Kukdo Chemical Co., YP-50EK), 3 g of nitrogen boride (manufactured by ESK Ceramic, Boronid-SCP1, Germany) and a curing agent (Diaminodiphenylsulfone) were used as the resin for forming the guide member. , Made by Sigma-Aldrich Co., Ltd.), mixed and uniformly dispersed, stirred for 30 minutes, applied to the groove, dried with hot air at 120 ° C. Adjust the coating amount according to the degree of contraction while volatilizing, apply repeatedly, the final dry thickness is 1.5 mm, except that the height of the outer diameter of the left and right cylinders is the same, the same method A tubular belt was produced.

<Comparative Example 1>
In Example 1, a tubular belt was manufactured by the same method except that a cylinder made of SUS 304 material having an outer diameter of 120 mm that was not provided with a groove for forming a guide member, and the cross-section was a square and the width was A double-sided adhesive tape (7033, made by Teraoka Co., Ltd.) with an acrylic adhesive layer on one side in a wide direction of a rubber band made of silicone rubber (made by Jinsok Urethane Co., Korea) with a thickness of 4.0 mm and a thickness of 1.3 mm. Then, after pressure-bonding so that the adhesive layer on the other surface of the double-sided adhesive tape is in contact with the inner peripheral surface of one side end of the tubular belt, the guide rail was attached by removing the bubbles by pressing with a roller .

<Comparative Example 2>
In Example 1, a tubular belt was manufactured by the same method except that a cylinder made of SUS 304 material having an outer diameter of 120 mm and not provided with a groove for forming a guide member. 0.0mm, 1.3mm thick shore hardness 60 polyether urethane rubber cord (Jinsok Urethane Co., Korea) on one side in a wide direction with epoxy one-component adhesive (PT-108 Co.) syringe After the pressure is applied so that the surface of the rubber strap with the adhesive applied contacts the inner peripheral surface of one end of the tubular belt, the adhesive is cured in an oven at 100 ° C. so that the adhesive is cured. The guide rail was attached by leaving it for a period of time.

  The adhesive application area is narrow during the manufacturing process, causing the adhesive liquid to flow down many times, and bubbles are generated from the adhesive while it is thermally cured in the oven. As a result, the adhesion part of the guide member became uneven.

<Comparative Example 3>
As a conventional product, a transfer belt was obtained from a color laser printer (manufactured by Samsung Electronics Co., Ltd., CLP-300) in which a tubular belt member made of PBT material and a guide member made of polyurethane material were attached via an adhesive.

  Each of the tubular belts manufactured in the examples and comparative examples and the guide members peeled from them were evaluated by the following methods. The results are shown in Table 1 and Table 2 below.

(1) Peel strength Specimen size-Length: 150 mm
-Width: 4.0mm
Peeling conditions-Peeling angle between guide member and tubular belt: 180 ° (see FIG. 10)
-Grip distance: 100 mm
-Speed: 50 mm / min
-Load Cell: 1kN
-Measuring instrument: Instron 3300 series
(2) Heat resistance 5% pyrolysis temperature was measured separately for each of the guide member and the belt as follows. The measurement environment is 25 ° C to 900 ° C and 55RH%.

Measuring instrument: Perkin Elmer, TGA
Measurement conditions: nitrogen gas filling, heating rate 10 ° C./min, specimen weight 1 g
(3) Dimensional change rate Dimension measuring instrument: Vimtec, EG3020M
High temperature and high humidity environment tester: HIRAYAMA, PC-422R8D
Samples of the guide member and the tubular belt were separately prepared and then placed in a high-temperature and high-humidity environment tester, and the test was allowed to stand for 20 hours at 85 ° C. and 85 RH%. At this time, the dimension before and after the test was measured with the dimension measuring instrument, and the rate of change in the longitudinal direction was calculated.

(4) Body resistance measuring instrument: Hiresta UP, Probe UR-100 (Dia instrument)
Measuring method: Applied voltage 250V
The measurement environment is 25 ° C. and 55 RH%.

(5) Printability The tubular belts of Examples and Comparative Examples were set in a Laser Jet 1600 type laser beam printer manufactured by Hewlett-Packard Company, and photographic data and character data were printed.

  A: Good images were obtained with both photographic data and text data.

  Δ: When photographic data was observed with a magnifying glass, a little rough portion appeared in the image.

  There was no problem when looking at text data only.

  X: Rough parts appeared in both photo data and text data.

(6) Contamination resistance In the state where the specimens of the tubular belts manufactured according to the examples and the comparative examples are alternately used for the transfer belt unit set in the Laser Jet 1600 type laser beam printer manufactured by Hewlett-Packard Company, The transfer belt unit was stored for 1 week under conditions of 32.5 ± 2 ° C. and relative humidity 90 ± 2%. Then, after each transfer belt unit was set in the printer, 100 sheets were subjected to halftone printing, and the presence or absence of contamination of the printed matter was confirmed with the naked eye and evaluated as follows.

  ○: There was no contamination throughout the printed matter when visually observed.

△: Light contamination (contamination with no problem when using 5 sheets or less)
×: Serious contamination (5 or more)
(7) Appearance The appearance of the tubular belts produced in Examples and Comparative Examples was evaluated with the naked eye.

  When viewed with the naked eye, the case where the outer surface of the tubular belt and the guide member were not clean was evaluated as good, and the case where the outer surface of the tubular belt was uneven or the surface of the guide member was not clean was evaluated as bad.

(8) Bending resistance Test method: JIS C6471, 8.2
Bending angle: 270 degrees Bending speed: 175 times / min Load: 500 g
The bending resistance was evaluated separately for the tubular belt member and the guide member, and also for the tubular belt portion provided with the guide member.

(9) Durability It is provided with two rollers in which grooves having the same size as the guide member are formed, and one of the two rollers is a rotation driving roller, and the one roller is against the other roller. As shown in FIG. 1, the tubular belt manufactured in the embodiment is applied to the equipment that can apply tension to the tubular belt while moving while maintaining the horizontal position, and the rotational drive is performed while maintaining the tension of 2 kg / m. It started and ended when the guide member or the tubular belt was torn or the deformation of the size or structure occurred, and the number of rotations at the end was confirmed. The lower the rotational speed, the lower the durability of the belt.

  As a result of the measurement of physical properties, when a tubular belt with a guide member attached thereto using an adhesive or an adhesive tape is manufactured, the guide member portion becomes uneven and the appearance is poor, which negatively affects printability. In addition, the durability was poor as compared with the case where the guide member and the tubular belt were directly bonded, and the guide member appeared to be easily peeled from the tubular belt due to insufficient adhesive force. In particular, it was confirmed that a relatively large dimensional change rate was expressed by the influence of the adhesive or the adhesive tape between the guide member and the tubular belt in a high temperature and high humidity environment.

  On the other hand, the tubular belt to which the guide member manufactured by the manufacturing method according to the present invention is attached exhibited excellent performance in printability, durability, adhesive strength, dimensional change rate due to high temperature and high humidity, and the like.

  The present invention can be applied to a fixing belt, an intermediate transfer belt, or a transfer belt that is used in an electronic apparatus such as a copying machine, a laser beam printer, and a facsimile machine and fixes or transfers a toner image formed on a copy paper or a transfer paper. is there.

Claims (21)

In a tubular belt having at least one selected from a polyimide resin, a polyamide resin and a polystyrene resin, having a body resistance value of 10 ⁸ to 10 ¹³ Ωcm, and having no seam, it is rotated in a predetermined direction on the inner peripheral surface. A tubular belt comprising a guide member integrally formed along the belt.   The tubular belt according to claim 1, wherein the guide member is seamless.   The tubular belt according to claim 1 or 2, wherein the guide member is made of the same material as the tubular belt.   The tubular belt according to claim 1 or 2, wherein the guide member is made of a material different from that of the tubular belt.   The guide member is made of polyurethane resin, polyacrylonitrile-butadiene rubber (NBR), polysiloxane resin, phenoxy resin, natural rubber (NR), polystyrene butadiene rubber (SBR), chloroprene rubber (CR), butyl rubber (IIR), ethylene- The tubular belt according to claim 4, wherein the tubular belt is formed of at least one selected from propylene rubber (EPDM) and chlorosulfonated polyethylene rubber (CSM).   The tubular belt according to any one of claims 1 to 5, wherein the guide member has a 180 ° peel strength of 6 N / cm or more.   The tubular belt according to claim 1 or 2, wherein at least one of the tubular belt and the guide member has a 5% pyrolysis start temperature measured by a thermogravimetric analyzer of 200 ° C or more. .   At least one of the tubular belt and the guide member has a dimensional change rate in the longitudinal direction within −1.0 to + 1.0% after being left for 20 hours at a temperature of 85 ± 2 ° C. and a humidity of 85 RH%. The tubular belt according to claim 1 or 2, characterized by the above.   The tubular belt according to claim 1 or 2, wherein the bending resistance measured according to JIS C6471, 8.2 is 500 times or more.   The tubular belt according to claim 1 or 2, wherein the guide member has a width of 2 to 20 mm and a thickness of 0.1 to 5 mm.   A cylinder for a tubular belt, which is a cylindrical structure having outer peripheral surfaces whose upper and lower surfaces are parallel with respect to a cross section, and include different outer diameter portions.   The tubular belt according to claim 11, wherein at least one groove portion is provided symmetrically on the upper and lower outer peripheral surfaces with respect to the cross section, and the groove portions are formed in a ring shape on the outer peripheral surface. Cylinder.   A cylindrical structure having a first outer diameter and a second outer diameter that is smaller than the first outer diameter and having the second outer diameter is a cylindrical structure having the first outer diameter. The tubular belt cylinder according to claim 11, wherein the tubular belt cylinder projects from an object.   The tubular belt cylinder according to any one of claims 11 to 13, wherein the cylindrical structure is a single structure having a plurality of outer diameters.   The tubular belt cylinder according to any one of claims 11 to 13, comprising a plurality of detachable cylindrical structures.   The tubular belt cylinder according to claim 15, wherein the plurality of cylindrical structures include a fixing portion having an outer diameter different from an outer diameter of the structure.   The material of the cylinder is at least one selected from aluminum, stainless steel, iron, copper, chromium, nickel, and a ceramic mixed material. The cylinder for tubular belts described in 1.   The tubular belt cylinder according to any one of claims 11 to 17, further comprising a release layer on an outer peripheral surface.   19. The tubular belt cylinder according to claim 18, wherein the release layer is made of a polymer resin material having heat resistance. Applying a resin for forming a guide member to the small diameter portion of the cylinder according to any one of claims 11 to 19;
A method for producing a tubular belt, comprising: applying a resin for forming a tubular belt to the outer peripheral surface of the cylinder; and curing the applied resin. Disposing a guide member on the small diameter portion of the cylinder according to any one of claims 11 to 19,
A method for producing a tubular belt, comprising: applying a resin for forming a tubular belt to the outer peripheral surface of the cylinder; and curing the applied resin.

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