JP5495541B2 - Electrophotographic belt - Google Patents

Description

  The present invention relates to an electrophotographic belt used for an intermediate transfer belt, a transfer belt, a photoreceptor belt, and the like in electrophotography, and a manufacturing method thereof.

  A schematic view of an example of an image forming apparatus using an intermediate transfer belt as an electrophotographic belt is shown in FIG. In the case of this intermediate transfer method, the transfer of the toner image from the electrophotographic photosensitive member to the transfer material is mainly performed by the primary transfer charging member, the intermediate transfer member, and the secondary transfer charging member.

  In the following description, examples of four colors (yellow, magenta, cyan, and black) are given. However, the “color” in the present invention is not limited to four colors (so-called full color), and is multicolor. That is, two or more colors.

  In FIG. 1, reference numeral 1 denotes a cylindrical electrophotographic photosensitive member, which is rotationally driven in a direction of an arrow about a shaft 2 at a predetermined peripheral speed.

  The surface of the electrophotographic photosensitive member 1 that is rotationally driven is uniformly charged to a predetermined positive or negative potential by the primary charging member 3, and then output from an exposure means (not shown) such as slit exposure or laser beam scanning exposure. The exposure light (image exposure light) 4 is received. The exposure light at this time is exposure light corresponding to the first color component image (for example, yellow component image) of the target color image. In this way, the first color component electrostatic latent image (yellow component electrostatic latent image) corresponding to the first color component image of the target color image is sequentially formed on the surface of the electrophotographic photoreceptor 1.

  The intermediate transfer member (intermediate transfer belt) 11 stretched by the stretching roller 12 and the secondary transfer counter roller 13 has substantially the same peripheral speed as the electrophotographic photosensitive member 1 in the direction of the arrow (for example, the peripheral speed of the electrophotographic photosensitive member 1). 97 to 103%).

  The first color component electrostatic latent image formed on the surface of the electrophotographic photoreceptor 1 is the first color contained in the developer carried on the first color developer carrying body (yellow developer carrying body) 5Y. The first toner image (yellow toner image) is developed by developing with toner (yellow toner).

  Next, the first color toner image formed and supported on the surface of the electrophotographic photoreceptor 1 is transferred to the electrophotographic photoreceptor 1 and the primary transfer charging member by the primary transfer bias from the primary transfer charging member (primary transfer charging roller) 6p. Primary transfer is sequentially performed on the surface of the intermediate transfer body 11 that passes between 6p.

  The surface of the electrophotographic photosensitive member 1 after the transfer of the first color toner image is cleaned by the cleaning member 7 to remove the developer (toner) remaining after the primary transfer, and then used for image formation of the next color. The

  The second color toner image (magenta toner image), the third color toner image (cyan toner image), and the fourth color toner image (black toner image) are also formed on the surface of the electrophotographic photoreceptor 1 in the same manner as the first color toner image. And sequentially transferred onto the surface of the intermediate transfer body 11. Thus, a synthetic toner image corresponding to the target color image is formed on the surface of the intermediate transfer member 11. During primary transfer of the first to fourth colors, the secondary transfer charging member (secondary transfer charging roller) 6 s and the charge applying member (charge applying roller) 7 r are separated from the surface of the intermediate transfer body 11.

  The composite toner image formed on the surface of the intermediate transfer body 11 is transferred from the transfer material supply means (not shown) to the secondary transfer counter roller 13 and the intermediate transfer body 11 by the secondary transfer bias from the secondary transfer charging member 6s. Secondary transfer is sequentially performed on the transfer material P fed to the nip with the secondary transfer charging member 6s.

  The transfer material P that has received the transfer of the synthetic toner image is separated from the surface of the intermediate transfer body 11 and introduced into the fixing means 8 to undergo image fixing to print out as a color image formed product (print, copy) outside the apparatus. Out.

  The charge imparting member 7r is brought into contact with the surface of the intermediate transfer body 11 after the synthetic toner image is transferred. The charge imparting member 7r imparts a charge having a reverse polarity to that of the secondary transfer remaining developer (toner) on the surface of the intermediate transfer body 11 to that of the primary transfer. The developer (toner) remaining after the secondary transfer to which a charge having a polarity opposite to that at the time of the primary transfer is applied is in contact with the electrophotographic photosensitive member 1 and the intermediate transfer member 11 and in the vicinity thereof. It is electrostatically transferred to the surface. In this way, the surface of the intermediate transfer body 11 after the transfer of the synthetic toner image is cleaned by receiving the developer (toner) remaining after transfer. The secondary transfer residual developer (toner) transferred to the surface of the electrophotographic photosensitive member 1 is removed by the cleaning member 7 together with the primary transfer residual developer (toner) of the surface of the electrophotographic photosensitive member 1. Transfer of the remaining secondary transfer developer (toner) from the intermediate transfer member 11 to the electrophotographic photosensitive member 1 can be performed simultaneously with the primary transfer, so that the throughput is not reduced.

  Further, the surface of the electrophotographic photoreceptor 1 after the developer (toner) remaining after transfer by the cleaning member 7 may be removed by pre-exposure light from pre-exposure means. As shown in FIG. 1, when contact charging using a roller-shaped primary charging member (primary charging roller) or the like is employed for charging the surface of the electrophotographic photosensitive member, pre-exposure is not necessarily required.

  FIG. 2 shows an example of a schematic configuration of an inline type color electrophotographic apparatus. In the case of this in-line method, the transfer of the toner image from the electrophotographic photosensitive member to the transfer material is mainly performed by a transfer material conveying member and a transfer charging member.

  In FIG. 2, 1Y, 1M, 1C, and 1K are cylindrical electrophotographic photosensitive members (first to fourth color electrophotographic photosensitive members), and the directions of the arrows are about axes 2Y, 2M, 2C, and 2K, respectively. Are rotated at a predetermined peripheral speed.

  The surface of the first color electrophotographic photosensitive member 1Y that is rotationally driven is uniformly charged to a predetermined positive or negative potential by the primary charging member 3Y for the first color, and then subjected to slit exposure, laser beam scanning exposure, or the like. Exposure light (image exposure light) 4Y output from exposure means (not shown) is received. The exposure light 4Y is exposure light corresponding to a first color component image (for example, a yellow component image) of a target color image. Thus, a first color component electrostatic latent image (yellow component electrostatic latent image) corresponding to the first color component image of the target color image is sequentially formed on the surface of the first color electrophotographic photoreceptor 1Y.

  The transfer material conveying belt 14 stretched by the stretching roller 12 has a peripheral speed (for example, the first color to the first color to the fourth color electrophotographic photoreceptors 1Y, 1M, 1C, 1K) in the direction of the arrow. The fourth color electrophotographic photosensitive member 1Y, 1M, 1C, and 1K is rotated at a speed of 97 to 103% with respect to the peripheral speed.

  Further, the transfer material (paper or the like) P fed from the transfer material supply means (not shown) is electrostatically carried (adsorbed) on the transfer material conveying member 14 and is electrophotographic for the first to fourth colors. The photoreceptors 1Y, 1M, 1C, and 1K are sequentially transported between the transfer material transport members (contact portions). The first color component electrostatic latent image formed on the surface of the first color electrophotographic photosensitive member 1Y is developed with the first color toner contained in the developer carried on the first color developer carrying member 5Y. Thus, a first color toner image (yellow toner image) is obtained.

  Next, the transfer material in which the first color toner image formed and supported on the surface of the electrophotographic photosensitive member 1Y passes between the electrophotographic photosensitive member 1Y and the transfer charging member 6Y by the transfer bias from the transfer charging roller 6Y. The images are sequentially transferred onto the transfer material P carried on the conveyor belt 14.

  The surface of the first color electrophotographic photoreceptor 1Y after the transfer of the first color toner image is subjected to removal of the transfer residual developer (toner) by the first color cleaning member (first color cleaning blade) 7Y. After the surface is cleaned, it is repeatedly used for forming a first color toner image.

  The first color electrophotographic photosensitive member 1Y, the first color primary charging member 3Y, the first color exposure means, the first color developer carrying member 5Y, and the first color transfer charging member 6Y are grouped into the first color. This is called an image forming unit.

  Also, the second color electrophotographic photosensitive member 1M, the second color primary charging member 3M, the second color exposure means, the second color developer carrying member 5M, and the second color transfer charging member 6M are collected together. A two-color image forming unit is used. Similarly, the third color electrophotographic photosensitive member 1C, the third color primary charging member 3C, the third color exposure means, the third color developer carrying member 5C, and the third color transfer charging member 6C are collected together. The third color image forming unit is used. Further, the fourth color electrophotographic photosensitive member 1K, the fourth color primary charging member 3K, the fourth color exposure means, the fourth color developer carrying member 5K, and the fourth color transfer charging member 6K are collected together. A four-color image forming unit is used.

  The operations of the second color image forming unit, the third color image forming unit, and the fourth color image forming unit are the same as the operations of the first color image forming unit. The second color toner image (magenta toner image), the third color toner image (cyan toner image), and the fourth color toner image are carried on the transfer material P that is carried on the transfer material conveying member 14 and onto which the first color toner image has been transferred. (Black toner image) is sequentially transferred. In this way, a composite toner image corresponding to the target color image is formed on the transfer material P carried on the transfer material conveying member 14.

  The transfer material P on which the synthetic toner image is formed is separated from the surface of the transfer material conveying member 14, introduced into the fixing means 8, and subjected to image fixing to be printed out of the apparatus as a color image formed product (print, copy). Out.

  Also, the first to fourth color electrophotographic photoreceptors 1Y, 1M, 1C, and 1K after the remaining developer (toner) after transfer is removed by the first to fourth color cleaning members 7Y, 7M, 7C, and 7K. This surface may be subjected to a static elimination treatment with pre-exposure light from pre-exposure means. However, as shown in FIG. 2, when contact charging using a roller-shaped primary charging member (primary charging roller) or the like is employed for charging the surface of the electrophotographic photosensitive member, pre-exposure is not necessarily required.

  In FIG. 2, 15 is an adsorption roller for adsorbing the transfer material to the transfer material conveyance member, and 16 is a separation charger for separating the transfer material from the transfer material conveyance member.

  FIG. 3 shows another example of a schematic configuration of an intermediate transfer type color electrophotographic apparatus. In the case of this intermediate transfer method, the transfer of the toner image from the electrophotographic photosensitive member to the transfer material is mainly performed by the primary transfer charging member, the intermediate transfer member, and the secondary transfer charging member.

  In FIG. 3, reference numerals 1Y, 1M, 1C, and 1K denote cylindrical electrophotographic photosensitive members (first to fourth color electrophotographic photosensitive members), and the directions of the arrows are about axes 2Y, 2M, 2C, and 2K, respectively. Are rotated at a predetermined peripheral speed.

  The surface of the first color electrophotographic photosensitive member 1Y that is rotationally driven is uniformly charged to a predetermined positive or negative potential by the primary charging member 3Y for the first color, and then subjected to slit exposure, laser beam scanning exposure, or the like. Exposure light (image exposure light) 4Y output from exposure means (not shown) is received. The exposure light 4Y is exposure light corresponding to a first color component image (for example, a yellow component image) of a target color image. Thus, a first color component electrostatic latent image (yellow component electrostatic latent image) corresponding to the first color component image of the target color image is sequentially formed on the surface of the first color electrophotographic photoreceptor 1Y.

  The intermediate transfer member (intermediate transfer belt) 11 stretched by the stretching roller 12 and the secondary transfer counter roller 13 has substantially the same peripheral speed as the electrophotographic photosensitive member 1 in the direction of the arrow (for example, the peripheral speed of the electrophotographic photosensitive member 1). 97 to 103%).

  The first color component electrostatic latent image formed on the surface of the first color electrophotographic photosensitive member 1Y is developed with the first color toner contained in the developer carried on the first color developer carrying member 5Y. Thus, a first color toner image (yellow toner image) is obtained. Next, the first color toner image formed and supported on the surface of the electrophotographic photosensitive member 1Y is transferred to the electrophotographic photosensitive member 1Y and the primary transfer charging member 6pY by the primary transfer bias from the first color primary transfer charging roller 6pY. Are sequentially transferred onto the surface of the intermediate transfer member 11 passing between the two.

  The surface of the first color electrophotographic photoreceptor 1Y after the transfer of the first color toner image is subjected to removal of the transfer residual developer (toner) by the first color cleaning member (first color cleaning blade) 7Y. After the surface is cleaned, it is repeatedly used for forming a first color toner image.

  The first color electrophotographic photosensitive member 1Y, the first color primary charging member 3Y, the first color exposure means, the first color developer carrying member 5Y, and the first color primary transfer charging member 6pY are grouped together as a first. This is called a color image forming unit.

Also, the second color electrophotographic photosensitive member 1M, the second color primary charging member 3M, the second color exposure means, the second color developer carrying member 5M, and the second color primary transfer charging member 6pM are collected. The second color image forming unit is used.
Similarly, the third color electrophotographic photosensitive member 1C, the third color primary charging member 3C, the third color exposure means, the third color developer carrying member 5C, and the third color primary transfer charging member 6pC are collected. The third color image forming unit.
Further, the fourth color electrophotographic photosensitive member 1K, the fourth color primary charging member 3K, the fourth color exposure means, the fourth color developer carrying member 5K, and the fourth color primary transfer charging member 6pK are collected. The fourth color image forming unit is used. The operations of the second color image forming unit, the third color image forming unit, and the fourth color image forming unit are the same as the operations of the first color image forming unit. A second color toner image (magenta toner image), a third color toner image (cyan toner image), and a fourth color toner image (black toner image) are sequentially primary transferred onto the surface of the intermediate transfer body 11. Thus, a synthetic toner image corresponding to the target color image is formed on the surface of the intermediate transfer member 11.

  The composite toner image formed on the surface of the intermediate transfer body 11 is transferred from the transfer material supply means (not shown) to the secondary transfer counter roller 13 and the intermediate transfer body 11 by the secondary transfer bias from the secondary transfer charging member 6s. Secondary transfer is sequentially performed on the transfer material P fed to the nip with the secondary transfer charging member 6s.

  The transfer material P that has received the transfer of the synthetic toner image is separated from the surface of the intermediate transfer body 11 and introduced into the fixing means 8 to undergo image fixing to print out as a color image formed product (print, copy) outside the apparatus. Out.

  The surface of the intermediate transfer body 11 after the transfer of the synthetic toner image is cleaned by removing the developer (toner) remaining after the secondary transfer by the intermediate transfer body cleaning member 7 ′, and then the next synthetic toner image. Used for forming.

  Also, the first to fourth color electrophotographic photoreceptors 1Y, 1M, 1C, and 1K after the remaining developer (toner) after transfer is removed by the first to fourth color cleaning members 7Y, 7M, 7C, and 7K. This surface may be subjected to a static elimination treatment with pre-exposure light from pre-exposure means. However, as shown in FIG. 3, pre-exposure is not always necessary when contact charging using a roller-shaped primary charging member (primary charging roller) or the like is used for charging the surface of the electrophotographic photosensitive member.

  As described above, color copiers, color printers, and the like using electrophotographic belts are already on the market.

  Examples of a method for producing such an electrophotographic belt include tube extrusion, inflation, centrifugal molding, blow molding, and injection molding. Among these, the blow molding, particularly the stretch blow molding method has molecular orientation caused by stretching, which is a characteristic of blow molding, improves the strength of the belt, and has high repeatability. Therefore, a product with a uniform quality can be stably formed, and since it can be molded at high speed, the cost can be reduced. From this, it is preferable as a method for forming a belt (Patent Documents 2 and 3).

  An example of the stretch blow molding method will be described with reference to FIGS. In the stretch blow molding, first, a test tube type molded product called a preform is molded. In this case, it is preferable to use injection molding in which the shape is easily stabilized. A preform 104 is formed by injection molding as shown in FIG.

Next, stretch blow is performed as shown in FIG. First, the preform 104 is put into a heating furnace 107 and heated to a glass transition temperature (hereinafter referred to as Tg) or higher of a thermoplastic resin which is the main preform. After heating, the preform 104 is placed in the blow mold 108, and the preform is stretched in the longitudinal direction by the stretching rod 109. This stretching is called primary stretching. At this time, it is preferable to introduce a gas so that the preform does not come into contact with the stretching rod, and this is called a primary pressure. After performing this primary stretching, the gas 110 is caused to flow from the preform opening 106 and swell laterally. This is called secondary stretching. Moreover, the gas inflow at this time is called secondary pressure. By performing these primary stretching and secondary stretching, the blow molded product 112 is obtained. Since the blow molded product 112 is stretched in both the vertical and horizontal directions, it becomes a high strength molded product. Next, when the upper and lower sides of the blow molded product are cut, a belt shape is obtained, and a high strength electrophotographic belt is obtained.
JP-A-63-301960 Japanese Patent Laid-Open No. 5-0623130 JP 2001-018284 A

  However, color electrophotographic apparatuses using electrophotographic belts such as these intermediate transfer belts and transfer belts function as devices that fully satisfy the above-mentioned advantages, truly meet expectations and give satisfaction to users. Not done. When providing an image forming apparatus using these electrophotographic belts, there are still problems to be overcome.

  The electrophotographic belt requires a so-called medium resistance region to a high resistance region as the electric resistance. As a method for realizing the electric resistance in this region, a method of adjusting the resistance using particles such as carbon black. And using an ionic conductive agent. Among these, carbon black has the merit that resistance can be adjusted at low cost and the resistance value is stable even in different environments. However, the resistance value is stable because the electric resistance value changes depending on the mixed state and a small amount of blending. High technology is necessary to make it possible. On the other hand, although the ionic conductive agent has a greater change in electrical resistance value due to the environment than carbon, there is little fluctuation in electrical resistance due to the mixed state and a small amount of mixed quantity fluctuation, and thus there is a feature that stable mass production is easy. Further, among the ionic conductive agents, the polyether ester amide resin is easily mixed with a relatively large number of materials and does not disperse molecules. Therefore, the bleed-out of the conductive agent with time is less than that of the molecular dispersion ionic conductive agent, and image defects, particularly transfer defects, caused by bleed-out after standing for a long time are unlikely to occur. For this reason, polyetheresteramide resins are used in electrophotographic belts.

  However, although there is a feature that bleed-out due to mere standing for a long time is difficult to occur, it has been found that the polyether ester amide resin may bleed out components having a reduced molecular weight when energized. This state has not been manifested in electrophotographic printers that have been used conventionally. However, the number of prints per minute has increased significantly due to improvements in printer performance. As a result, the increase in applied current to the belt and the number of prints have also increased significantly. It turns out that a problem occurs.

  Due to the occurrence of this bleed-out, it was difficult to produce a high-speed, high-durability electrophotographic belt using a polyether ester amide resin.

  Accordingly, an object of the present invention is to solve the above-mentioned problems and to realize an electrophotographic belt that does not have a transfer defect even after long-term image output, and an image forming apparatus using the same.

  That is, the present invention provides an electrophotographic belt that can withstand long-term durability in an electrophotographic belt using a polyether ester amide resin.

  In the present invention, the following electrophotographic belt is used to solve the above-mentioned problems.

Polyetheresteramide resin (A);
A thermoplastic elastomer (B) having a functional group represented by the following formula (1);

A thermoplastic resin (C) other than (A) and (B);
A carbodiimide compound ( D ),
An electrophotographic belt containing a hydrotalcite compound (E) ,
The polyether ester amide resin (A) is extracted when 3 parts by weight of distilled water is used for 1 part by weight of the polyether ester amide resin (A) and left at a temperature of 50 ° C. for 24 hours. An electrophotographic belt , wherein the amount of the component is 0.5% by mass or less .

  According to the present invention, bleeding caused by the polyetheresteramide resin (A) can be effectively suppressed. As a result, a highly durable electrophotographic belt in which transfer defects are suppressed is provided.

The belt for electrophotography according to the present invention is
Polyetheresteramide resin (A);
A thermoplastic elastomer (B) having a functional group represented by the following formula (1);

A thermoplastic resin (C) other than (A) and (B);
A carbodiimide compound (D),
A compound (D) represented by the following general formula (2):
M ²⁺ (1-X) M ³⁺ X (OH) 2A ^n- (X / n) .mH ₂ O (2)
(However, 0 <X ≦ 0.5, m ≧ 0, M ²⁺ ; divalent metal ion, M ³⁺ ; trivalent metal ion, A ⁿ⁻ ; n-valent anion, n is an integer of 1 or more ).

<Thermoplastic resin elastomer (B)>
First, the thermoplastic elastomer (B) will be described.

  The thermoplastic elastomer (B) has a functional group represented by the following formula (1).

This functional group is known to react with the amide component (formula (3)).

  Since the polyether ester amide resin in question contains an amide, it seems to be bonded to the amide in the low molecular component of the polyether ester amide resin that is likely to bleed out. The bleed-out mechanism by energization is not clear. However, it is considered that the low molecular component of the polyether ester amide resin is transferred to the surface by energization. Therefore, first, the bleed out is suppressed by binding the low molecular component of the polyether ester amide resin to an elastomer resin having a chemically higher molecular weight.

  The thermoplastic elastomer (B) to which the functional group of the formula (1) is added is not particularly limited, but a styrene thermoplastic elastomer can be suitably used. In particular, it is preferable to use a hydrogenated styrene thermoplastic elastomer.

Moreover, it is preferable to add the thermoplastic elastomer (B) so as to be contained in the thermoplastic resin mixture for forming an electrophotographic belt in an amount of 2% by mass or more and 10% by mass or less.
By adding in this range, bleed-out can be effectively suppressed. Further, it is possible to suppress a decrease in tensile elastic modulus that causes the belt to stretch as the number of printed sheets increases.

<Carbodiimide compound (D)>
Next, the carbodiimide compound will be described.

  Carbodiimide compounds are used as hydrolysis inhibitors for polyester resins. The polyether ester amide resin that is concerned about bleeding is also a polyester-based resin, and it is considered that if it is decomposed to lower the molecular weight, it causes bleeding out. Therefore, by mixing a carbodiimide compound, hydrolysis is prevented and a low molecular component of the polyetheresteramide resin is not generated, so that bleed out is suppressed.

  As the carbodiimide compound, for example, polycarbodiimide can be used. Carbodiimide-modified isocyanate is particularly preferable.

  The addition amount of the carbodiimide compound is preferably added so as to be contained in the thermoplastic resin mixture for forming an electrophotographic belt in a range of 0.1% by mass to 2% by mass. If it is 0.1% by mass or less, the bleed-out effect decreases. If it is 2% by mass or more, the viscosity of the polyester resin is increased, so that molding may be difficult.

<Compound (E)>
The compound (E) is represented by the following formula (2). Hereinafter referred to as hydrotalcite compound:
M ²⁺ (1-X) M ³⁺ X (OH) 2A ^n- (X / n) .mH ₂ O (2)
(However, 0 <X ≦ 0.5, m ≧ 0, M ²⁺ ; divalent metal ion, M ³⁺ ; trivalent metal ion, A ⁿ⁻ ; n-valent anion, n is an integer of 1 or more ).

  Hydrotalcite compounds are generally used as acid catching agents, but it is thought that they can also capture degradation products. Therefore, by mixing the hydrotalcite compound, a degradation product of the polyether ester amide resin due to energization can be captured and bleeding out can be suppressed.

  Examples of the hydrotalcite compound include hydrated basic carbonates such as magnesium, calcium, zinc, aluminum, and bismuth, or basic carbonates that do not contain crystal water. Moreover, these carbonates which are natural products, or these carbonates which are synthetic products are mentioned. In particular, magnesium, aluminum, hydroxide, carbonate (trade names: DHT-4A, DHT-4C, etc. (all manufactured by Kyowa Chemical Industry Co., Ltd.), etc. Further, when mixed with a polyester resin or the like, water is used. Mg-aluminum hydroxide carbonate (trade name: DHT-4C (manufactured by Kyowa Chemical Industry Co., Ltd.)) is particularly preferable.

  The addition amount of the hydrotalcite compound is preferably added so as to be included in the thermoplastic resin mixture for forming an electrophotographic belt in a range of 0.1% by mass to 3% by mass. When it is less than 0.1% by mass, the bleed prevention effect is reduced. When the amount is more than 3% by mass, the belt surface is rough, and image defects may occur due to deterioration of surface properties.

  These three types of bleed-out prevention effects are effective, but alone are insufficient. Thus, by combining these three types, a dramatic effect was obtained regarding the suppression of bleed out of the polyetheresteramide resin.

  Since these have different mechanisms for suppressing bleed-out, it is considered that each of them complemented each other and exhibited an effect.

<Polyetheresteramide resin (A)>
In the present invention, it is preferable to use a previously purified polyether ester amide resin (A) in order to further suppress bleed out.

  The low molecular component of the polyether ester amide resin (A) that generates bleed is easily soluble in water. Therefore, it is possible to further prevent bleeding out by extracting a water-soluble component with distilled water.

  The method for extracting low molecular weight components of polyetheresteramide resin is that many low molecular weight components can be extracted by leaving the polyetheresteramide resin to 1 with distilled water 3 at a temperature of 50 ° C. for 24 hours. , Low molecular components can be removed.

  Once the low molecular components are removed, the water is then sufficiently removed with a vacuum dryer. By using this, further bleed out can be prevented.

  At this time, in order to confirm that the low molecular component of the polyether ester amide resin has been extracted, the amount of the extracted component extracted may be measured by the following measurement method. At this time, the amount of the extracted low molecule is preferably 0.5% by mass or less, and more preferably 0.1% by mass or less.

  Details of the extraction method are shown below.

[Method for measuring the amount of low molecular components of polyetheresteramide resin]
In a 1.2 liter glass bottle, 300 g of polyetheresteramide resin is added, and 900 g of ion-exchanged water is added.
2. 2. Cover this bottle and leave it in an oven at 50 ° C. for 24 hours. After leaving, the pellet is removed by filtering with a nylon mesh, and then water is filtered with a filter paper. The filtrate is put in a 1 liter glass bottle (the mass is measured in advance).
4. Heat in an oven at 110 ° C until no moisture is present. The mass of the low-molecular-weight component is obtained by measuring the mass of the glass bottle that has been dehydrated and subtracting the mass of the glass bottle before drying.
6). (Mass of low molecular component / 300) × 100 = content of low molecular component (mass%)
The polyether ester amide resin used in the present invention is not particularly limited as long as it has a plurality of ether bonds, ester bonds, and amide bonds in the main chain. For example, TPAE-10HP-10 (manufactured by Fuji Kasei Kogyo Co., Ltd.), which is a polymerized fatty acid-based polyether ester amide block copolymer, can be used.

  Since the object of the present invention is to prevent bleeding out of low molecular components of the polyether ester amide resin, the smaller the low molecular components contained in the polyether ester amide resin before purification, the better. A particularly preferable amount is 1% by mass or less, more preferably 0.5% by mass or less, and particularly preferably 0.3% by mass or less. In order to measure the amount of the low molecular component of the polyether ester amide to be used, the aforementioned water extraction is simple and accurate.

  The polyether ester amide resin used in the present invention may be used alone or in combination. When using a plurality of, for example, polyether ester amide resins having different resistances, especially low resistance polyether ester amide resins and high resistance polyether ester amide resins, the electrical resistance stability is higher than when used alone. Become.

  When stretch blow molding is performed, the content of the polyether ester amide resin is such that the polyether ester amide resin is stretched during stretching and the distance between the dispersed polyether ester amide resins is shortened. Is demonstrated. Therefore, the thermoplastic resin mixture for forming an electrophotographic belt is preferably contained in an amount of 5% by mass to 30% by mass. Moreover, in the case of extrusion molding, in order to exhibit electroconductivity, 21 mass% or more and 40 mass% or less are preferable.

<Thermoplastic resin (C)>
The thermoplastic resin (C) is not particularly limited. Examples of thermoplastic resins that can be used are listed below. Polypropylene (homo, block and random copolymers), polyethylene terephthalate, polyethylene naphthalate, polylactic acid, polyamide, etc. These resins can be used alone or in combination of two or more. Among these, more preferable thermoplastic resins are polyethylene terephthalate, polyethylene naphthalate, a mixture thereof or a copolymer thereof having stretch orientation characteristics among thermoplastic resins.

  In the present invention, bleeding of the polyether ester amide resin due to long-term image output (that is, bleeding of low molecular components of the polyether ester amide resin due to energization) is suppressed. Here, since it takes time to perform a long-term image output experiment, it is possible to determine the quantification of the bleed amount by performing the following energization experiment. However, the quality is finally judged by conducting an image output experiment with an actual image forming apparatus.

  First, an electrophotographic belt is sandwiched between electrodes A and B having a diameter of 80 mm, and a current of 150 μA is applied for 48 hours. Thereafter, the difference between the sum b of the masses of the electrodes A and B and the sum a of the masses of the electrodes A and B before the current flows is obtained.

  It was found that when the difference c at this time, that is, the bleed amount per φ80 mm circular area from the belt was 0.2 mg or less, no image defect occurred.

  Regarding the amount of bleed, since the amount of polyetheresteramide contained therein varies depending on the belt film thickness, it is natural that the thicker belt tends to increase. However, in the present invention, since the amount of bleed out to the surface is important in the present invention, it is judged that 0.2 mg or less per φ80 mm is preferable as the amount of bleed out regardless of the belt thickness or mass. The substance that bleeds out at this time is considered to be mainly polyetheresteramide, but it may not be only polyetheresteramide, so this evaluation method is only for the difference in bleedout amount. It is only what makes it clear.

  The materials of the electrodes A and B are preferably materials that are not easily oxidized when a current is applied. For example, it is preferable to apply chromium plating or gold plating on both sides of the aluminum electrode.

The electrophotographic belt of the present invention is preferably a belt formed by stretch blow molding.
This is because stretch-oriented crystals of the resin occur by performing stretch blow molding, and as a result, the belt strength is greatly improved.

Moreover, as a compounding ratio of the thermoplastic resin (C), as a compounding amount that can be molded into a bottle shape,
The thermoplastic resin mixture for forming an electrophotographic belt is preferably contained in an amount of 50% by mass or more, but may be less than 50% by mass as long as a molecularly oriented bottle can be molded.

  The resistance value of the electrophotographic belt needs to be adjusted. In the present invention, the resistance is adjusted with a polyetheresteramide resin. In the case of an intermediate transfer belt, the volume resistivity range in which a good image can be obtained is between 1E + 6 Ω · cm and 8E + 13 Ω · cm. If the volume resistivity is less than 1E + 6 Ω · cm, the resistance is too low to obtain a sufficient transfer electric field, resulting in image omission and roughness. On the other hand, if the volume resistivity is higher than 8E + 13 Ω · cm, it is necessary to increase the transfer voltage, which may increase the size and cost of the power supply. In the case of a transfer belt, a transfer material such as paper needs to be adsorbed and transported, so a preferable resistance range is between 1E + 8 Ω · cm and 5E + 14 Ω · cm. However, depending on the transfer process, transfer may be possible even outside this range, so the resistance is not necessarily limited to the above range.

  The additive to be mixed in order to adjust the electric resistance value of the electrophotographic belt of the present invention is mainly a polyether ester amide resin, but in addition to this, various conductive agents may be added.

  Examples of the conductive agent are listed below.

  Carbon black, graphite, aluminum-doped zinc oxide, tin oxide-coated titanium oxide, tin oxide, tin oxide-coated barium sulfate, potassium titanate, aluminum metal powder, nickel metal powder, tetraalkylammonium salt, trialkylbenzyl, ammonium salt, alkyl Sulfonate, alkylbenzene sulfonate, alkyl sulfate, glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene alkylamine, polyoxyethylene fatty alcohol ester, alkylbetaine, lithium perchlorate, polyether amide and the like.

  Among these additives, potassium perfluorobutanesulfonate is particularly preferable because it is easily dissolved in the polyether ester amide, and since the melting point is 300 ° C. or higher, it is difficult to elute.

  In the electrophotographic belt of the present invention, a release agent may be added to enhance the toner release effect.

  Examples of the release agent include wax, fluorine resin particles, silicone oil, silicone resin, and silicone rubber particles.

  Among these, a mixture of silicone resin and silica particles is particularly preferable.

  Although the silicone resin has a high mold release effect, it is difficult to disperse in the resin, and there are cases where large bump-like projections are likely to occur on the belt surface. When a mixture of silicone resin and silica is used, the silica particles serve as spacers for the silicone resin, preventing contact between the silicone particles, and can be easily dispersed.

  In the electrophotographic belt of the present invention, a compatibilizing agent may be added in order to improve the adhesion between the polyetheresteramide resin (A) and the thermoplastic resin (C). As a compatibilizer for polyether ester amide and polyethylene terephthalate or polyethylene naphthalate, an acrylic one is preferred. In particular, Reseda GP301 manufactured by Toagosei Co., Ltd. and LOTADE AX8900 manufactured by Arkema are preferred.

  The thickness of the electrophotographic belt is preferably in the range of 40 μm to 300 μm. If it is 40 μm or less, molding stability is insufficient, thickness unevenness tends to occur, durability strength is insufficient, and belt breakage or cracking may occur. On the other hand, when the thickness exceeds 300 μm, the material increases and the cost increases, and the difference in the peripheral speed between the inner surface and the outer surface at the stretched shaft portion of a printer or the like increases, and problems such as image scattering due to contraction of the outer surface are likely to occur. Further, there is a problem that the bending durability is lowered and the rigidity of the belt becomes too high to increase the driving torque, resulting in an increase in the size of the main body and an increase in cost.

  The volume resistance measuring method according to the present invention will be described below.

<Volume resistance measurement method>
The measuring apparatus uses an ultrahigh resistance meter R8340A (manufactured by Advantest) as an ohmmeter, and an ultrahigh resistance measurement sample box TR42 (manufactured by Advantest) as a sample box. The diameter of the main electrode is 25 mm, the inner diameter of the guard ring electrode is 41 mm, and the outer diameter is 49 mm (according to ASTM D257-78).

  Samples are prepared as follows. First, the electrophotographic belt is cut into a circle having a diameter of 56 mm with a punching machine or a sharp blade. An electrode is provided by a Pt—Pd vapor deposition film on the entire surface of one side of the cut circular piece, and a main electrode having a diameter of 25 mm and a guard electrode having an inner diameter of 38 mm and an outer diameter of 50 mm are provided on the other surface by a Pt—Pd vapor deposition film. The Pt—Pd vapor deposition film is obtained by performing a vapor deposition operation for 2 minutes with a mild sputtering E1030 (manufactured by Hitachi, Ltd.) at a current of 15 mA and a distance between the target and the sample of 15 mm. The sample after the vapor deposition operation is used as a measurement sample.

  The measurement atmosphere is 23 ° C./52%, and the measurement sample is previously left in the same atmosphere for 12 hours or more. The measurement is performed with a discharge of 10 seconds, a charge of 30 seconds, a major of 30 seconds, and an applied voltage of 100V.

Among Examples 1 to 10, Examples 1 and 5 to 10 are reference examples.
Example 1
<Thermoplastic resin mixture (a)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 67.5% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tuftec M1913 manufactured by Asahi Kasei Chemicals) 5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming raw material a.

<Preparation of intermediate transfer belt (1)>
Next, the molding raw material a is dried at 140 ° C. for 3 hours and then injected into the hopper 105 of the injection molding apparatus shown in FIG. 4, and a preset temperature is adjusted to 290 ° C. to perform injection molding. did. The injection mold temperature at this time was 15 ° C. In addition, the preform size was 160 mm for the portion e in FIG. 6 and 44 mm for the portion g. This preform was put into the molding apparatus of FIG. 4 and molded under the following conditions.

Longitudinal draw ratio 2.5 times Transverse draw ratio 5.2 times Preform temperature 165 ° C (heating time 11.5 seconds)
Stretching rod speed 0.5m / sec
Primary pressure 0.3 MPa
The time from when the drawing rod starts to move until the gas flows in 0.41 sec
Secondary pressure 0.9 MPa
Blow mold temperature 23 ℃
As the mold size, a horizontally divided mold having h of 230.5 mm and f of 400 mm in FIG. 6 was used.

  As shown in FIG. 7, the blow molded product was left with a central portion of 250 mm, and both ends 113 were cut with an ultrasonic cutter to produce an intermediate transfer belt having a diameter of 230 mm, a length of 250 mm, and an average thickness of 70 μm at the center of the bottle. This was designated as an intermediate transfer belt (1).

<Evaluation>
The intermediate transfer belt (1) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. A full color image was printed on 80 g / m ² paper. As a result, the secondary transfer efficiency was good at 95%. After printing 120,000 sheets using this belt, it was left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.

  In addition, an energization experiment was performed on a belt made of the same material and manufacturing method as the intermediate transfer belt (1). First, the intermediate transfer belt (1) is cut into a circle having a size of φ85 mm. Next, the belt is sandwiched between electrodes A and B having a diameter of 80 mm shown in FIG. 8, and a current of 150 μA is applied between the electrodes. This state was left for 48 hours. Although the surface of the electrode after standing was observed, cloudiness and the like were hardly seen. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 0.02 mg, and bleed was hardly seen.

(Example 2)
<Purification of polyetheresteramide resin>
Charge 2 kg of pellets of polyetheresteramide resin (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo), 6 kg of ion exchange water, and put into a stainless steel container (Three-One Motor BL300MX-10). The temperature of the container is adjusted to 50 ° C. while stirring at a motor rotation speed of 50 rpm, and left for 24 hours. After leaving, ion-exchanged water is discarded, and 6 kg of ion-exchanged water is added and stirred at 50 rpm for 5 minutes, and the ion-exchanged water is discarded. By repeating this twice, the polyether ester amide low molecular weight component adhering to the pellet surface is removed (so-called rinsing).

  After rinsing, ion-exchanged water is discarded, wet pellets are spread on an aluminum vat, dried in an oven at 80 ° C. for 8 hours to remove moisture, and purification is completed. This is designated as purified polyetheresteramide (2).

<Confirmation of purified polyetheresteramide>
The low molecular weight components before and after purification were measured by the same method as [Method for measuring the amount of low molecular weight components of polyetheresteramide resin] in the specification. The low molecular weight component of the polyether ester amide resin (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo) before purification was 0.85%. It was 0.05% after purification, and it was found that low molecular weight components were largely removed.

<Preparation of thermoplastic resin mixture (b)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 67.5% by mass
Purified polyetheresteramide resin (2) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was used as a forming raw material b.

<Preparation of intermediate transfer belt (1)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material b was used. This was designated as an intermediate transfer belt (2).

<Evaluation>
The intermediate transfer belt (2) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no transfer defect was observed. It was.
Further, the same energization experiment as in Example 1 was performed on the belt having the same material and manufacturing method as the intermediate transfer belt (2).

  As a result, the surface of the electrode after standing was observed, but no cloudiness was observed. When the masses of the electrodes A and B before being left were subtracted from the masses of the electrodes A and B after being left, no reduction was observed (below the measurement limit). Also, no bleed was seen.

(Example 3)
<Purification of polyetheresteramide resin>
Same as Example 2 <Confirmation of purified polyetheresteramide>
Same as Example 2 <Preparation of thermoplastic resin mixture (c)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 66.5% by mass
Purified polyetheresteramide resin (2) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (LOTADER AX8900) 4% by mass
1% by mass of silicone / silica mixed release agent (DC4-7081 manufactured by Toray Dow Corning)
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a molding material c.

<Preparation of intermediate transfer belt (1)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material c was used. This was designated as an intermediate transfer belt (3).

<Evaluation>
The intermediate transfer belt (3) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was 98%, which was even better than those of Examples 1 and 2. This seems to be due to the addition of a silicone silica mixture as a release agent. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.

  Further, the same energization experiment as in Example 1 was performed on a belt made of the same material and manufacturing method as the intermediate transfer belt (3). As a result, the surface of the electrode after standing was observed, but no cloudiness was observed. When the masses of the electrodes A and B before being left were subtracted from the masses of the electrodes A and B after being left, no reduction was observed (below the measurement limit). Also, no bleed was seen.

(Example 4)
<Purification of polyetheresteramide resin>
Same as Example 2 <Confirmation of purified polyetheresteramide>
Same as Example 2 <Preparation of thermoplastic resin mixture (d)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 70% by mass
Purified polyetheresteramide resin (2) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
15% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
Perfluorobutanesulfonate potassium (Mitsubishi Materials F Top KFBS) 2% by mass
1% by mass of silicone / silica mixed release agent (DC4-7081 manufactured by Toray Dow Corning)
Carbon for coloring (Mitsubishi Chemical MA-100) 1.5% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was used as a forming raw material d.

<Preparation of intermediate transfer belt (4)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material d was used. This was designated as an intermediate transfer belt (4).

<Evaluation>
The intermediate transfer belt (4) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was 98%, which was even better than those of Examples 1 and 2. This seems to be due to the addition of a silicone silica mixture as a release agent. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.

  Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (4). As a result, the surface of the electrode after standing was observed, but no cloudiness was observed. When the masses of the electrodes A and B before being left were subtracted from the masses of the electrodes A and B after being left, no reduction was observed (below the measurement limit). Also, no bleed was seen.

(Example 5)
<Preparation of thermoplastic resin mixture (e)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 62.5% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
10% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a molding material e.

<Preparation of intermediate transfer belt (5)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material e was used. This was designated as an intermediate transfer belt (5).

<Evaluation>
The intermediate transfer belt (5) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.

  Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (5). As a result, the surface of the electrode after standing was observed, but no cloudiness was observed. When the masses of the electrodes A and B before being left were subtracted from the masses of the electrodes A and B after being left, no reduction was observed (below the measurement limit). Also, no bleed was seen. This is probably because the amount of the thermoplastic elastomer was increased as compared with Example 1.

(Example 6)
<Preparation of thermoplastic resin mixture (f)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 70.5% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
2% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming raw material f.

<Preparation of intermediate transfer belt (6)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the forming raw material f was used. This was designated as an intermediate transfer belt (6).

<Evaluation>
The intermediate transfer belt (6) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.

Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (6). As a result, the surface of the electrode after standing was observed, but only a slight amount of cloudiness was observed. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 0.15 mg.
Although the bleed was observed only slightly, it was found that the actual print image was not affected.

(Example 7)
<Preparation of thermoplastic resin mixture (g)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 66.0% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1943 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 2.0 mass%
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming raw material g.

<Preparation of intermediate transfer belt (7)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material g was used. This was designated as an intermediate transfer belt (7).

<Evaluation>
The intermediate transfer belt (7) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full-color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 96%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.

  Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (7). As a result, the surface of the electrode after standing was observed, but no cloudiness was observed. When the masses of the electrodes A and B before being left were subtracted from the masses of the electrodes A and B after being left, no reduction was observed (below the measurement limit). Also, no bleed was seen. This is probably because the amount of the carbodiimide compound was increased as compared with Example 1.

(Example 8)
<Preparation of thermoplastic resin mixture (h)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 67.9% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.1% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming raw material h.

<Preparation of intermediate transfer belt (8)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material h was used. This was designated as an intermediate transfer belt (8).

<Evaluation>
The intermediate transfer belt (8) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.

Further, the same energization experiment as in Example 1 was performed on a belt made of the same material and manufacturing method as the intermediate transfer belt (8). As a result, the surface of the electrode after standing was observed, but only a slight amount of cloudiness was observed. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 0.18 mg.
Although the bleed was observed only slightly, it was found that the actual print image was not affected.

Example 9
<Preparation of thermoplastic resin mixture (i)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 65.5% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1943 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 3% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming raw material i.

<Preparation of intermediate transfer belt (9)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material i was used. This was designated as an intermediate transfer belt (9).

<Evaluation>
The intermediate transfer belt (9) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full-color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 96%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.
Further, the same energization experiment as in Example 1 was performed on the belt having the same material and manufacturing method as the intermediate transfer belt (9).

  As a result, the surface of the electrode after standing was observed, but no cloudiness was observed. When the masses of the electrodes A and B before being left were subtracted from the masses of the electrodes A and B after being left, no reduction was observed (below the measurement limit). Also, no bleed was seen. This is probably because the amount of hydrotalcite compound was increased as compared with Example 1.

(Example 10)
<Preparation of thermoplastic resin mixture (j)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 68.4% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (DHT-4C, manufactured by Kyowa Chemical Industry Co., Ltd.) 0.1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was used as a forming raw material j.

<Preparation of intermediate transfer belt (10)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material j was used. This was designated as an intermediate transfer belt (10).

<Evaluation>
The intermediate transfer belt (10) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

Next, the belt was left in an environment of 23 ° C./50% RH for one day with the belt mounted on the full-color electrophotographic apparatus shown in FIG. 3, and an image was output. However, no defective image, particularly no defective transfer was observed. It was.
Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (10). As a result, the surface of the electrode after standing was observed, but only a slight amount of cloudiness was observed. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 0.13 mg.
Although the bleed was observed only slightly, it was found that the actual print image was not affected.

(Comparative Example 1)
<Preparation of thermoplastic resin mixture (k)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 78% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming material k.

<Preparation of intermediate transfer belt (11)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material k was used. This was designated as an intermediate transfer belt (11).

<Evaluation>
The intermediate transfer belt (11) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for 1 day with the full-color electrophotographic apparatus shown in FIG. 3 mounted, and an image was output. However, transfer failure, particularly secondary transfer failure occurred. This is presumably because the polyether ester amide resin bleeded out on the surface by energization.

Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (11). As a result, clouding and the like were clearly seen while observing the surface of the electrode after standing. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 1.3 mg.
It has been found that when this amount bleeds out, an image defect occurs.

(Comparative Example 2)
<Preparation of thermoplastic resin mixture (l)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 60.5% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
12% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was used as a forming raw material l.

<Preparation of intermediate transfer belt (12)>
An intermediate transfer belt was prepared in the same manner as in Example 1 except that the forming raw material 1 was used. This was designated as an intermediate transfer belt (12).

<Evaluation>
The intermediate transfer belt (12) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. An attempt was made to print 120,000 full-color images using this belt. However, the image could not be confirmed after long-term durability because the belt was detached from the image forming apparatus after 80,000 sheets.

(Comparative Example 3)
<Preparation of thermoplastic resin mixture (m)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 71.5% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
1% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming material m.

<Preparation of intermediate transfer belt (13)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material m was used. This was designated as an intermediate transfer belt (13).

<Evaluation>
The intermediate transfer belt (13) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the full-color electrophotographic apparatus shown in FIG. 3 attached, and an image was output. Only a slight transfer failure was observed.

  Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (13). As a result, the surface of the electrode after standing was observed, but a slight amount of cloudiness was observed. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 0.25 mg. It was found that a transfer defect appears in an actual print image although this bleed amount is small.

(Comparative Example 4)
<Preparation of thermoplastic resin mixture (n)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 65.0% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1943 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 3.0 mass%
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was used as a forming raw material n.

<Preparation of intermediate transfer belt (14)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material n was used, but the resin viscosity was high and injection molding could not be performed.

(Comparative Example 5)
<Preparation of thermoplastic resin mixture (o)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 67.95% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.05 mass%
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 1% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming raw material o.

<Preparation of intermediate transfer belt (15)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material o was used. This was designated as an intermediate transfer belt (15).

<Evaluation>
The intermediate transfer belt (15) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the full-color electrophotographic apparatus shown in FIG. 3 attached, and an image was output. Only a slight transfer failure was observed.

Further, the same energization experiment as in Example 1 was performed on the belt made of the same material and manufacturing method as the intermediate transfer belt (15). As a result, the surface of the electrode after standing was observed, but a slight amount of cloudiness was observed. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 0.43 mg.
It was found that a transfer defect appears in an actual print image although this bleed amount is small.

(Comparative Example 6)
<Preparation of thermoplastic resin mixture (p)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 64.5% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1943 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (Kyowa Chemical Industry DHT-4C) 4% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming material p.

<Preparation of intermediate transfer belt (16)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material p was used. However, the image was not evaluated due to frequent occurrence of fluff due to hydrotalcite on the surface.

(Comparative Example 7)
<Preparation of thermoplastic resin mixture (q)>
PEN resin (Teonex TN-8050SC manufactured by Teijin Chemicals Ltd.) 68.2% by mass
Polyetheresteramide resin (1) (TPAE-10HP-10 manufactured by Fuji Kasei Kogyo)
22% by mass
Thermoplastic elastomer with functional group of formula (1) (Tough Tech M1913 manufactured by Asahi Kasei Chemicals)
5% by mass
Carbodiimide compound (Nisshinbo Carbodilite LA-1) 0.5% by mass
Hydrotalcite compound (DHT-4C manufactured by Kyowa Chemical Industry Co., Ltd.) 0.3% by mass
Compatibilizer (Toeda Gosei Reseda GP-301) 4% by mass
The above materials were melted and kneaded at 300 ° C. by a biaxial extruder to uniformly mix each component, extruded as a strand having a diameter of about 2 mm, cut and formed into pellets. This was designated as a forming raw material q.

<Preparation of intermediate transfer belt (17)>
An intermediate transfer belt was prepared by the same method as in Example 1 except that the molding material q was used. This was designated as an intermediate transfer belt (17).

<Evaluation>
The intermediate transfer belt (17) is mounted on the full-color electrophotographic apparatus shown in FIG. 3, the primary transfer bias is 20 μA, the secondary transfer bias is 30 μA, the process speed is 120 mm / s, and the environment is 23 ° C./50% RH. When a full color image was printed on 80 g / m ² paper, the secondary transfer efficiency was good at 95%. Further, 120,000 full-color images were printed using this belt, and then left for 1 week in an environment of 30 ° C./80% RH. The reason for leaving it for one week is that it takes time to move to the surface when a low molecular component of the polyether ester amide resin is generated.

  Next, the belt was left in an environment of 23 ° C./50% RH for one day with the full-color electrophotographic apparatus shown in FIG. 3 attached, and an image was output. Only a slight transfer failure was observed.

Further, the same energization experiment as in Example 1 was performed on the belt of the same material and manufacturing method as the intermediate transfer belt (17). As a result, the surface of the electrode after standing was observed, but a slight amount of cloudiness was observed. When the mass of the electrodes A and B before being left was subtracted from the mass of the electrodes A and B after being left, it was 0.38 mg.
It was found that a transfer defect appears in an actual print image although this bleed amount is small.

1 is a diagram illustrating an outline of an example of an image forming apparatus using an intermediate transfer belt of the present invention. 1 is a diagram schematically illustrating an example of an image forming apparatus using a transfer belt of the present invention. 1 is a diagram illustrating an outline of an example of an image forming apparatus using an intermediate transfer belt of the present invention. It is the schematic of an example of an injection molding apparatus. It is the schematic of an example of an extending | stretching blow molding apparatus. It is explanatory drawing of preform and blow mold size. It is explanatory drawing which shows a cutting position. It is explanatory drawing of an electrode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photosensitive drum 2 axis | shaft 3 Primary charging device 4 Image exposure means 5 Developing device 6 Transfer member 7 Cleaning member 8 Fixing device 11 Intermediate transfer body 12 Tension roller 13 Cleaning device 14 Transfer conveyance belt 15 Adsorption roller 101 Injection molding device 102 Cavity type 103 Core mold 104 Preform 105 Hopper 106 Preform mouth part 107 Heating furnace 108 Blow mold after heating 109 Stretching rod 110 Gas 112 Blow molded product 113 Cut part 114 Belt P Transfer material

Claims (5)

Polyetheresteramide resin (A);
A thermoplastic elastomer (B) having a functional group represented by the following formula (1);

A thermoplastic resin (C) other than (A) and (B);
A carbodiimide compound (D);
An electrophotographic belt containing a hydrotalcite compound (E) ,
The polyether ester amide resin (A) is extracted when 3 parts by weight of distilled water is used for 1 part by weight of the polyether ester amide resin (A) and left at a temperature of 50 ° C. for 24 hours. An electrophotographic belt , wherein the amount of the component is 0.5% by mass or less .   The belt for electrophotography according to claim 1, wherein the thermoplastic elastomer (B) is a styrenic thermoplastic elastomer having a functional group represented by the formula (1).   The electrophotographic belt according to claim 1, wherein the thermoplastic resin (C) is polyethylene terephthalate, polyethylene naphthalate, a mixture thereof, or a copolymer thereof. The electrophotographic belt according to claim 1, wherein the hydrotalcite compound is a compound represented by the following formula (2):
^{M 2+ (1-X) M} 3+ X (OH) 2A n- (X / n) · mH 2 O (2)
(In formula (2), 0 <X ≦ 0.5, m ≧ 0, M ²⁺ ; divalent metal ion, M ³⁺ ; trivalent metal ion, A ⁿ⁻ ; n-valent anion, n is 1 or more Integer). An electrophotographic apparatus comprising the electrophotographic belt according to claim 1 .

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