JP5473498B2 - Storage box for storing electrophotographic photoreceptors - Google Patents

Description

  The present invention relates to a storage box for storing an electrophotographic photosensitive member, a storage box for storing an electrophotographic photosensitive member unit, or a storage box for storing an electrophotographic photosensitive member and an electrophotographic photosensitive member unit (hereinafter referred to as a storage box). , Also simply referred to as “storage box”).

  An electrophotographic photosensitive member used in an electrophotographic apparatus generally has a configuration in which at least a photosensitive layer is provided on a cylindrical support. In addition, when an image is formed by an electrophotographic apparatus, the electrophotographic photosensitive member is often used as an electrophotographic photosensitive member unit by assembling a rotation drive transmission gear or flange at both ends of the electrophotographic photosensitive member. In the electrophotographic process, the electrophotographic photosensitive member is exposed to light to form an electrostatic latent image on the surface of the electrophotographic photosensitive member, and the electrostatic latent image is developed with toner to form a visible toner image. An image is formed by being transferred to a transfer material.

  If the surface of the electrophotographic photosensitive member is scratched or the electrophotographic characteristics are deteriorated by light irradiation, the image quality is also deteriorated, which may cause image defects. When storing the electrophotographic photosensitive member and / or the electrophotographic photosensitive member unit (hereinafter also referred to as “electrophotographic photosensitive member etc.”), make sure that the surface of the electrophotographic photosensitive member is not scratched, and at the same time from the outside. Care must be taken not to block light and degrade electrophotographic properties.

  Therefore, as disclosed in Patent Document 1, a method of winding a protective sheet around an electrophotographic photosensitive member in order to protect and shield the surface of the electrophotographic photosensitive member is disclosed. A tape having an appropriate adhesive strength is used for fixing the protective sheet, and both ease of peeling and prevention of natural peeling are achieved.

  However, the process of winding a light-shielding protective sheet around a plurality of electrophotographic photosensitive members requires time and labor, and becomes a factor of reducing mass productivity. Further, when the electrophotographic photosensitive member is used in an electrophotographic apparatus, it is necessary to remove the wound protective sheet. However, in this case as well, time and labor are required, which reduces the mass productivity. . In view of the cost of the protective sheet, a storage method that does not use the protective sheet has been desired.

  As a method for this, in Patent Document 2, two packaging containers each having a concave portion for accommodating an electrophotographic photosensitive member are used, and the respective accommodating concave portions provided in each are overlapped with each other, whereby each electrophotographic photosensitive member is overlapped. There has been proposed a packaging container that forms a housing space. The housing recess is provided with a support portion provided at a position shallower than the bottom surface of the housing recess at both ends thereof and formed at a width narrower than the width of the housing recess, and is provided at both ends of the electrophotographic photosensitive member unit by the support portion. It is designed to support gears and flanges. As a result, the surface of the photosensitive layer of the electrophotographic photosensitive member is held in the storage space without coming into contact with the storage recess, and the generation of scratches is prevented. Moreover, in this packaging container, the partition wall of each storage recess has a specific shape, so that the thickness of the material is reduced to reduce the storage space and reduce the weight while maintaining an appropriate strength. The light shielding property corresponds to using a resin composition to which a black pigment is added as a molding material. Examples of the black pigment include carbon black. Carbon black is known not only to have light-shielding properties, but also to have antistatic effects to prevent adhesion of dust and weather resistance, and is suitable for boxes and containers that store electrophotographic photosensitive members. It is a useful material. However, when the material forming the box or container is thin, the strength of the heavy electrophotographic photosensitive member against the physical distribution is not sufficient. If the content of carbon black is reduced within a range in which the light shielding property can be maintained in order to ensure the strength, the antistatic effect and the weather resistance will be lowered. In addition, considering indoor and outdoor logistics, it is difficult to ensure sufficient antistatic effect and weather resistance with carbon black alone, and reinforcement is necessary to prevent deterioration of the material due to aging.

  Therefore, antistatic agents and weathering materials other than carbon black are usually added to improve antistatic properties and weather resistance. Patent Document 3 discloses examples of weather-resistant materials such as antistatic agents and ultraviolet absorbers that can be used as additives. In general, these additives are expensive, and depending on the amount added, the manufacturing cost of the box will be high, so there is a low molecular weight additive that is low in price and easy to produce effects such as antistatic and weather resistance. Often used.

JP 2002-160785 A Japanese Patent No. 4040855 JP 2002-189321 A

  However, in a storage box obtained by molding a resin composition containing an additive such as a low molecular weight antistatic agent or a weather-resistant material, the above-mentioned additive is added to the surface of the storage box over time. The transition phenomenon is likely to occur. Further, on the inner surface of the storage box, components transferred to the surface may volatilize and adhere to the surface of the electrophotographic photosensitive member. The above phenomenon becomes more prominent as the temperature of the storage environment is higher. In many electrophotographic apparatuses, after the toner image on the surface of the electrophotographic photosensitive member is transferred to a transfer material, residual toner is removed by a cleaning means such as a cleaning blade. In the electrophotographic photosensitive member having the additive attached to the surface, the coefficient of friction with the cleaning blade in contact with the surface of the electrophotographic photosensitive member is increased, which causes a problem that the cleaning blade is turned up or chipped. Further, when this electrophotographic photosensitive member is mounted on an electrophotographic apparatus and image formation is performed, there is a problem that image defects such as streaks and unevenness due to poor cleaning occur.

〔式（１）中、Ｒ_１は、炭素数１乃至２０の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基あるいは置換または非置換アリールオキシ基である。Ｘ_１およびＸ_２は、それぞれ下記式で示される結合基を示す。〕

〔式中、ｍは１あるいは２である。〕
また、Ａ_１およびＡ_２は下記群から選ばれる基を示す。

〔式中、Ｒ_２は炭素数１乃至２０の置換または非置換アルキル基あるいは置換または非置換アリール基である。〕

〔式（２）中、Ｘ_３およびＸ_４の定義は、Ｘ_１およびＸ_２の定義と同じであり、Ａ_３およびＡ_４の定義は、Ａ_１およびＡ_２の定義と同じである。〕

〔式（３）中、Ｒ_３は、炭素数１乃至２０の置換または非置換アルキル基あるいは置換または非置換アリール基である。ｎは３乃至１１の整数を示す。〕

〔式（４）中、Ｒ_４、Ｒ_５およびＲ_６は、ヒドロキシ基、炭素数１乃至２５の置換または非置換アルキル基、置換または非置換アリール基あるいは置換または非置換カルボン酸エステル基を示す。〕

〔式（５）中、Ｒ_７、Ｒ_８、Ｒ_９およびＲ_１０は、炭素数１乃至２０の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基、置換または非置換アリールオキシ基あるいは置換または非置換カルボン酸エステル基を示す。Ｘ_５はＳ原子、炭素数１乃至１４の２価のカルボン酸エステル基あるいは炭素数１乃至１２のアルキレン基を示す。〕

〔式（６）中、Ｒ_１１およびＲ_１２は、水素原子、炭素数１乃至２０の置換または非置換アルキル基あるいは置換または非置換アリール基を示す。〕

〔式（７）中、Ｂ_１およびＢ_２は下記式で示される有機基を示す。Ｘ_６は、炭素数１乃至１２のアルキレン基を示す。〕

〔式中、Ｒ_１3は、水素原子、炭素数１乃至１０の置換または非置換アルキル基あるいは置換または非置換アリール基を示す。〕

〔式（８）中、Ｒ_１４およびＲ_１５は水素原子、ハロゲン原子、ヒドロキシ基、炭素数１乃至１５の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基、置換または非置換アリールオキシ基あるいは置換または非置換カルボン酸エステル基を示す。Ｘ_７は単結合あるいは下記式で示される２価の有機基を示す。〕

また、Ｑは下記式で示される有機基を示す。

〔式中、Ｒ_１６乃至Ｒ_１９は、それぞれ水素原子、ハロゲン原子、ヒドロキシ基、炭素数１乃至１５の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基あるいは置換または非置換アリールオキシ基を示す。〕
なお、上述したように、本発明の上記式（１）乃至（８）で示される各化合物は、分子量が５６０以下である。そのためには、該化合物の分子量が５６０以下になるように式中のＲ_１乃至Ｒ_１９の構造や、ｍおよびｎの値の組み合わせを調整する必要がある。 The present invention relates to a storage box for storing an electrophotographic photoreceptor and / or an electrophotographic photoreceptor unit.
The storage box
At least one selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound represented by the following formula (3), and a compound represented by the following formula (4): Contains at least one selected from the group consisting of a compound represented by the following formula (5), a compound represented by the following formula (6), a compound represented by the following formula (7) and a compound represented by the following formula (8) A molded product formed from a resin composition,
Each having a molecular weight of 560 or less,
The total content of the compound in the molded product is from 86 ppm to 200 ppm.

[In Formula (1), R ₁ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group. X ₁ and X ₂ each represent a linking group represented by the following formula. ]

[In the formula, m is 1 or 2. ]
A ₁ and A ₂ represent a group selected from the following group.

[Wherein R ₂ represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. ]

Wherein (2) Definition of _{X 3} and _{X 4} are as defined for _{X 1} and _{X 2,} the definition of _{A 3} and _{A 4} are as defined for _{A 1} and _{A 2.} ]

Wherein (3), R ₃ is a substituted or unsubstituted alkyl or substituted or unsubstituted aryl group having 1 to 20 carbon atoms. n represents an integer of 3 to 11. ]

[In the formula (4), R ₄ , R ₅ and R ₆ represent a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 25 carbon atoms, a substituted or unsubstituted aryl group, or a substituted or unsubstituted carboxylic acid ester group. . ]

[In the formula (5), R ₇ , R ₈ , R ₉ and R ₁₀ are each a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, substituted or unsubstituted A substituted aryloxy group or a substituted or unsubstituted carboxylic acid ester group is shown. X ₅ represents an S atom, a divalent carboxylic acid ester group having 1 to 14 carbon atoms, or an alkylene group having 1 to 12 carbon atoms. ]

[In Formula (6), R ₁₁ and R ₁₂ represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group. ]

Wherein (7), _{B 1} and _{B 2} represents an organic group represented by the following formula. X ₆ represents an alkylene group having 1 to 12 carbon atoms. ]

[Wherein, R ₁₃ represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group. ]

[In the formula (8), R ₁₄ and R ₁₅ are hydrogen atom, halogen atom, hydroxy group, substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, substituted or unsubstituted aryl group, substituted or unsubstituted alkoxy group, substituted Or an unsubstituted aryloxy group or a substituted or unsubstituted carboxylic acid ester group; X ₇ represents a single bond or a divalent organic group represented by the following formula. ]

Q represents an organic group represented by the following formula.

[Wherein R _{16 to} R ₁₉ are each a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or An unsubstituted aryloxy group is shown. ]
As described above, each compound represented by the above formulas (1) to (8) of the present invention has a molecular weight of 560 or less. For that purpose, it is necessary to adjust the structure of R _{1 to} R ₁₉ in the formula and the combination of the values of m and n so that the molecular weight of the compound is 560 or less.

Further, the present invention provides a storage box for storing an electrophotographic photosensitive member and / or an electrophotographic photosensitive member unit,
On at least the inner surface of the storage box,
Compound represented by the formula (1), the formula (2) compound represented by and at least one selected from the group consisting of compounds represented by the above formula (3), and compounds represented by the above formula (4), the compound represented by the formula (5), the compound represented by the formula (6), the equation (7), a compound represented by and at least one selected from the group consisting of compounds represented by the above formula (8)
A coating layer made of a resin composition containing
Each having a molecular weight of 560 or less,
The total content of the compound in the coat layer is from 86 ppm to 200 ppm.

Further, the present invention provides a storage box for storing an electrophotographic photosensitive member and / or an electrophotographic photosensitive member unit,
When an electrophotographic photosensitive member and / or an electrophotographic photosensitive member unit is housed in the storage box, the gap is formed between the inner surface of the storage box and the electrophotographic photosensitive member and / or the electrophotographic photosensitive member unit. ,
Compound represented by the formula (1), the formula (2) compound represented by and at least one selected from the group consisting of compounds represented by the above formula (3), and compounds represented by the above formula (4), the compound represented by the formula (5), the compound represented by the formula (6), the equation (7), a compound represented by and at least one selected from the group consisting of compounds represented by the above formula (8)
A plate material made of a resin composition containing is installed,
Each having a molecular weight of 560 or less,
The total content of the compound in the plate material is from 86 ppm to 200 ppm.

  According to the present invention, even when the electrophotographic photosensitive member is stored for a long period of time, the cleaning blade is turned over or chipped when the electrophotographic photosensitive member is used in an electrophotographic apparatus, and images such as stripes and unevenness are generated. A storage box in which occurrence of defects can be suppressed can be provided.

It is a figure which shows the structure of the storage box for storing the electrophotographic photoreceptor and / or the electrophotographic photoreceptor unit of the present invention. It is a bottom view of the storage box for storing the electrophotographic photosensitive member and / or the electrophotographic photosensitive member unit of the present invention. It is a side view of the A direction in FIG. It is a side view of the B direction in FIG. FIG. 2 is an enlarged view of a support member of the electrophotographic photosensitive member in FIG. 1. It is an external view of an electrophotographic photosensitive member. It is a figure which shows the structure of the storage box in which the plate material of this invention is installed. 1 is a schematic view of an electrophotographic apparatus.

  Hereinafter, the storage box for storing the electrophotographic photoreceptor and / or the electrophotographic photoreceptor unit of the present invention will be described in more detail. The following embodiments and examples are examples embodying the present invention, and do not limit the technical scope of the present invention.

  FIG. 1 is a diagram showing a configuration of a storage box according to the present invention. The storage box is composed of a lid 1 and a bottom box 2, and a support member 3 is provided inside the bottom box 2 for supporting the electrophotographic photosensitive member or the electrophotographic photosensitive member unit 4 at both ends when stored. Yes. The support member 3 is a member for preventing contact with the surface of the bottom box 2 so as not to damage the photosensitive layer provided on the surface of the electrophotographic photosensitive member or the electrophotographic photosensitive member unit 4.

  FIG. 2 is an example of a plan view of the bottom box 2 when the electrophotographic photoreceptor unit 4 is stored in the storage box of the present invention. The support member 3 is provided in accordance with the number of electrophotographic photoreceptor units 4 to be accommodated. Side views seen from the A direction and the B direction shown in FIG. 2 are shown in FIGS. 3 and 4, respectively. The bottom surface inside the bottom box 2 is preferably at least a portion where the photosensitive layer of the electrophotographic photosensitive member of the electrophotographic photosensitive member unit 4 is closest. The gap between the bottom surface and the surface of the electrophotographic photosensitive member unit 4 is preferably 5 mm to 10 mm. The distance between the electrophotographic photosensitive unit 4 and the adjacent electrophotographic photosensitive unit 4 is preferably 20 mm or less, more preferably 10 mm or less from the viewpoint of space saving.

  FIG. 5 is a diagram showing an example of the shape of the support member 3. The supporting members 3 may be arranged in a necessary number according to the number of accommodated electrophotographic photoreceptor units 4, or may be integrated according to the number of accommodated electrophotographic photoreceptor units 4. In order to prevent the electrophotographic photoreceptor unit 4 from moving and contacting the adjacent electrophotographic photoreceptor unit 4 during distribution, it is preferable to provide a recess 5 on the surface supporting the electrophotographic photoreceptor unit 4. Furthermore, a step can be provided in the recess 5 so that the electrophotographic photosensitive member unit 4 does not move in the axial direction. The shape of the step may be selected according to the shape of the end portion of the electrophotographic photosensitive member or the electrophotographic photosensitive member unit 4 to be stored.

  FIG. 6 is a view showing an example of the electrophotographic photosensitive member unit 4 in which the drive transmission gear 6 and the flange 7 are assembled to the electrophotographic photosensitive member. The object stored in the storage box can be either an electrophotographic photosensitive member or an electrophotographic photosensitive member unit 4.

  The storage box of the present invention is a molded product made of a resin composition. Examples of the resin contained in the resin composition include polyolefins such as polyethylene, polypropylene, and polystyrene, AS resins, ABS resins, methacrylic resins, polyvinyl chloride, polyacetals, polycarbonates, polyamides, polybutylene terephthalates, polyethylene terephthalates, polyphenylene sulfide, and polysulfones. , Polyethersulfone, fluororesin, polyamideimide, polyimide, silicone, phenol resin, epoxy resin, amino resin, polyurethane and the like can be used alone or in combination of two or more, but are not limited thereto. It is not something. Among these, polyolefin is preferable. In particular, polypropylene is preferable because it is relatively inexpensive, has a harder surface than the other resins, is hardly scratched, and has excellent impact resistance.

  The molded product preferably contains carbon black in order to impart light shielding properties. As described above, by containing carbon black, the storage box can be provided with antistatic properties and weather resistance. The content of carbon black in the molded product is preferably in the range of 0.1 to 5% by weight. If the carbon black content is 0.1% by weight or more, a desired light-shielding property can be sufficiently ensured. In particular, when the content is 1% by weight or more, antistatic properties and weather resistance can be sufficiently secured. Further, if the content is 5% by weight or less, when molding a storage box (molded product) by injection molding the resin composition, molding defects can be suppressed, and appearance defects and physical strength can be suppressed. It is done. In particular, it is preferably 0.5% by weight or less. In this case, in order to sufficiently secure antistatic properties and weather resistance, it is preferable to add an antistatic agent and a weatherproof material described later.

  In the present invention, the molded product contains the specific antistatic agent and the weathering material in order to enhance the antistatic property and weatherability. A surfactant is used as the antistatic agent. By blending this, charging deterioration of the electrophotographic photosensitive member due to static electricity can be prevented, and adhesion of dust to the storage box can be prevented. Examples of the weather resistant material include an antioxidant, a light stabilizer, and an ultraviolet absorber from the viewpoint of preventing deterioration.

  Specifically, the compound represented by the above formula (1) (alkylamine derivative), the compound represented by the above formula (2) (polyhydric alcohol ester type compound), and the compound represented by the above formula (3) (ether type). Compound) is a nonionic surfactant and is a kind of antistatic agent. Moreover, the compound shown by the said Formula (4) and the compound shown by the said Formula (5) are phenolic antioxidants, and are 1 type of a weather resistant material. The compound represented by the above formula (6) (hindered amine compound) and the compound represented by the above formula (7) (hindered amine compound) are light stabilizers and are a kind of weather resistant material. The compound represented by the above formula (8) is an ultraviolet absorber and is a kind of weather resistant material.

  As described above, the total content of the antistatic agent and the weather-resistant material in the molded product needs to be 200 ppm or less (mass basis) with respect to the molded product, and is preferably 100 ppm or less. When the total content of the antistatic agent and the weathering material exceeds 200 ppm, the volatilization amount of the antistatic agent and the weathering material increases and adheres to the surface of the electrophotographic photosensitive member. Decreases, and the coefficient of friction between the electrophotographic photosensitive member and the cleaning blade increases.

The antistatic agent has a molecular weight of 560 or less. An antistatic agent having a molecular weight of 560 or less can be obtained at a low price, and antistatic properties are easily exhibited. However, in order to suppress surface migration and volatilization of the antistatic agent, the total content must be suppressed to 200 ppm or less. As the molecular weight exceeds 560, the surface migration and volatilization of the antistatic agent are less likely to occur, but the manufacturing cost of the antistatic agent is increased and the control of the molding conditions may be complicated, and the storage box It will lead to cost increase. In order to achieve both antistatic properties and cost reduction, the molecular weight is preferably 450 to 560.
Further, the molecular weight of the weather-resistant material is 560 or less similarly to the antistatic agent. A weather-resistant material having a molecular weight of 560 or less can be obtained at a low price, and weather resistance is also easily developed. In addition, as the molecular weight exceeds 560, the surface migration and volatilization of the weather-resistant material are less likely to occur, but the production cost of the weather-resistant material is increased and the cost of the storage box is also increased. In order to achieve both weather resistance and cost reduction, the molecular weight is preferably 450 to 560.

  Antistatic agents include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. In the storage box of the present invention, among the antistatic agents described above, a nonionic surfactant is used from the viewpoint that the adverse effect on the electrophotographic characteristics is small and the antistatic effect is large.

〔式中、Ｒ_１は、炭素数１乃至２０の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基あるいは置換または非置換アリールオキシ基である。Ｘ_１およびＸ_２は、下記式で示される結合基を示す。〕

〔式中、ｍは、１あるいは２である。〕
また、Ａ_１およびＡ_２は下記群から選ばれる基を示す。

〔式中、Ｒ_２は、炭素数１乃至２０の置換または非置換アルキル基あるいは置換または非置換アリール基でる。〕

〔式中、Ｘ_３およびＸ_４の定義は、Ｘ_１およびＸ_２の定義と同じであり、Ａ_３およびＡ_４の定義はＡ_１およびＡ_２の定義と同じである。〕

〔式中、Ｒ_３は炭素数１乃至２０の置換または非置換アルキル基あるいは置換または非置換アリール基である。ｎは３乃至１１の整数を示す。〕 Nonionic surfactants that can be used in the present invention include compounds represented by the following formula (1) (alkylamine derivatives), compounds represented by the following formula (2) (polyhydric alcohol ester type compounds), and the following formula (3). It is a compound (ether type compound) shown by these.

[Wherein, R ₁ represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group. X ₁ and X ₂ represent a linking group represented by the following formula. ]

[Wherein m is 1 or 2; ]
A ₁ and A ₂ represent a group selected from the following group.

[Wherein R ₂ represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. ]

[Wherein, the definitions of X ₃ and X ₄ are the same as the definitions of X ₁ and X ₂ , and the definitions of A ₃ and A ₄ are the same as the definitions of A ₁ and A ₂ . ]

[Wherein, R ₃ represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. n represents an integer of 3 to 11. ]

Examples of the compound represented by the formula (1) are shown below.

Examples of the compound represented by the formula (2) are shown below.

Examples of the compound represented by the formula (3) are shown below.

Antioxidants include phosphorus antioxidants and the like (alkylated allyl phosphites, triphenyl phosphites, etc.) in addition to phenolic antioxidants. In the storage box of the present invention, a phenolic antioxidant is used from the viewpoint of suppressing thermal decomposition of the resin.

〔式中、Ｒ_４、Ｒ_５およびＲ_６はヒドロキシ基、炭素数１乃至２５の置換または非置換アルキル基、置換または非置換アリール基あるいは置換または非置換カルボン酸エステル基を示す。〕

〔式中、Ｒ_７、Ｒ_８、Ｒ_９およびＲ_１０は、炭素数１乃至２０の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基、置換または非置換アリールオキシ基あるいは置換または非置換カルボン酸エステル基を示す。Ｘ_５はＳ原子、炭素数１乃至１４の２価のカルボン酸エステル基あるいは炭素数１乃至１２のアルキレン基を示す。〕 The phenolic antioxidant that can be used in the present invention is a compound represented by the following formula (4) and a compound represented by the following formula (5). In view of the environment at the time of distribution, it is preferable to use a hindered phenol antioxidant having excellent heat resistance.

[Wherein R ₄ , R ₅ and R ₆ represent a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 25 carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted carboxylic acid ester group. ]

[Wherein R ₇ , R ₈ , R ₉ and R ₁₀ represent a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy, Represents a group or a substituted or unsubstituted carboxylic acid ester group. X ₅ represents an S atom, a divalent carboxylic acid ester group having 1 to 14 carbon atoms, or an alkylene group having 1 to 12 carbon atoms. ]

Examples of the compound represented by the formula (4) are shown below.

Examples of the compound represented by the formula (5) are shown below.

〔式中、Ｒ_１１およびＲ_１２は、水素原子、炭素数１乃至２０の置換または非置換アルキル基あるいは置換または非置換アリール基を示す。〕

〔式中、Ｂ_１およびＢ_２は、上記の右式で示される有機基を示す。
Ｒ_１３は水素原子、炭素数１乃至１０の置換または非置換アルキル基あるいは置換または非置換アリール基を示す。また、Ｘ_６は炭素数１乃至１２のメチレン基を示す。〕 The light stabilizer that can be used in the present invention is a compound represented by the following formula (6) and a compound represented by the following formula (7).

[Wherein, R ₁₁ and R ₁₂ represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group. ]

Wherein, B ₁ and B _2, an organic group represented by the right formula.
R ₁₃ represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group. X ₆ represents a methylene group having 1 to 12 carbon atoms. ]

Examples of the compound represented by the formula (6) are shown below.

Examples of the compound represented by the formula (7) are shown below.

〔式中、Ｒ_１４およびＲ_１５は、水素原子、ハロゲン原子、ヒドロキシ基、炭素数１乃至１５の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基、置換または非置換アリールアルコキシ基あるいは置換または非置換カルボン酸エステル基を示す。Ｘ_７は、単結合あるいは下記式で示される２価の有機基を示す。〕

また、Ｑは下記式で示される有機基を示す。

〔式中、Ｒ_１６乃至Ｒ_１９は、水素原子、ハロゲン原子、ヒドロキシ基、炭素数１乃至１５の置換または非置換アルキル基、置換または非置換アリール基、置換または非置換アルコキシ基あるいは置換または非置換アリールアルコキシ基を示す。〕
上記各基が有してもよい置換基としては、例えば、メチル基、エチル基のようなアルキル基や、フェニル基、ナフチル基のようなアリール基や、メトキシ基、エトキシ基のようなアルコキシ基や、フッ素原子、塩素原子、臭素原子のようなハロゲン原子が挙げられる。 The ultraviolet absorber that can be used in the present invention is a compound represented by the following formula (8). Among ultraviolet absorbers, benzophenone-based ultraviolet absorbers, salicylate-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, and the like can be given. These ultraviolet absorbers have a function of protecting the resin from ultraviolet rays by absorbing light having a wavelength of 320 nm to 350 nm, which is liable to cause deterioration of the resin, and converting it into harmless vibration energy and heat energy. It is an effective additive in the sense that it suppresses UV degradation of storage boxes during distribution.

[Wherein, R ₁₄ and R ₁₅ represent a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, substituted or non-substituted, A substituted arylalkoxy group or a substituted or unsubstituted carboxylic acid ester group is shown. X ₇ represents a single bond or a divalent organic group represented by the following formula. ]

Q represents an organic group represented by the following formula.

[Wherein R _{16 to} R ₁₉ represent a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or non-substituted group. A substituted arylalkoxy group is shown. ]
Examples of the substituent that each group may have include, for example, an alkyl group such as a methyl group and an ethyl group, an aryl group such as a phenyl group and a naphthyl group, and an alkoxy group such as a methoxy group and an ethoxy group. And halogen atoms such as fluorine atom, chlorine atom and bromine atom.

Examples of the compound represented by the formula (8) are shown below.

  In addition to the above antistatic agent and weather resistant material, the molded product may contain a lubricant, plasticizer, filler, or the like used for enhancing processability at the time of molding. In addition to 560 or less, it is preferable that the total amount of all additives including the above antistatic agent and weathering material is 200 ppm or less. Further, since aldehyde compounds, sulfur compounds and cyanide compounds may adversely affect electrophotographic characteristics even in small amounts, it is preferable to refrain from using them as much as possible.

  The storage box of the present invention is preferably a molded product integrally molded using the above resin composition. Examples of the molding method include an injection molding method, a compression molding method, an extrusion molding method, and a vacuum molding method. Of these, the injection molding method is particularly preferable. As the injection molding method, any ordinary injection molding method can be used without particular limitation. At the time of molding, additives such as carbon black, antistatic agent and weathering material, and raw materials such as resin may be dry blended with a mixer or the like, melt kneaded and pelletized, and then subjected to a molding machine.

  The thickness of the storage box is not particularly limited as long as the strength can be maintained during distribution, but is preferably 0.1 mm to 5.0 mm, and more preferably 0.5 mm to 3.0 mm. In particular, the bottom box 2 needs to be strong against an impact during distribution, and is preferably 1.0 mm to 3.0 mm.

  Another storage box of the present invention is provided with a coat layer made of a resin composition containing additives such as the above-mentioned antistatic agent and weathering material on at least the inner surface of the storage box. Regarding the support member, the surface of the support member is a target for providing the coat layer, but it is not always necessary because it does not face the surface of the electrophotographic photosensitive member. The coat layer can be formed by applying a solution obtained by dissolving and / or dispersing the resin composition in an aromatic organic solvent such as xylene or toluene onto the inner surface of the storage box. Examples of the coating method include a brush coating method and a roll coating method. Also, the above extrusion molding method can be used. The essential range / preferable range of various conditions such as the molecular weight and content of the antistatic agent and the weather resistant material are the same as those in the storage box. For example, the molecular weight of the compound (antistatic agent and weathering material) is 560 or less. Further, the total content of the compounds in the coat layer is 200 ppm or less, and preferably 100 ppm or less.

  Still another storage box of the present invention is a storage box in which a plate material made of a resin composition containing additives such as the above-mentioned antistatic agent and weathering material is installed. The position of the plate material in the storage box is a position where a gap is formed between the inner surface of the storage box and the electrophotographic photosensitive member when the electrophotographic photosensitive member is stored in the storage box. FIG. 7 is a view showing an example in which the plate material 8 is installed in the storage box. In this case, each plate member 8 is preferably formed according to the shape of the inner wall of the storage box. As a method for forming the plate material, the above-described injection molding method, extrusion molding method, or the like can be used. Further, the support member 3 may be formed using the same resin as that of the plate material. However, since the support member 3 does not face the surface of the electrophotographic photosensitive member, it is not necessarily required to be the same resin. The essential range / preferable range of various conditions such as the molecular weight and content of the antistatic agent and the weather resistant material are the same as those in the storage box. For example, the molecular weight of the compound (antistatic agent and weathering material) is 560 or less. Further, the total content of the compounds in the plate material is 200 ppm or less, and preferably 100 ppm or less.

Next, the structure of the electrophotographic photosensitive member that can be accommodated in the storage box of the present invention will be described.
The layer structure of the photosensitive layer of the electrophotographic photoreceptor may be either a single layer type or a laminated type. From the viewpoint of improvement and stabilization of electrophotographic characteristics, a laminate type is preferable. In the following, the configuration of a laminated electrophotographic photoreceptor will be described as an example.

  Examples of the cylindrical substrate used in the present invention include metals or alloys such as aluminum, nickel, copper, gold, and iron, and aluminum or aluminum alloys are often selected.

  As described above, a conductive layer is provided between the cylindrical substrate and an intermediate layer described later for the purpose of preventing interference fringes due to laser light scattering and covering the scratches on the cylindrical substrate.

  The conductive layer can be formed by applying a conductive layer coating liquid obtained by dispersing conductive particles such as metal oxide particles and a binder resin together with a solvent onto a cylindrical substrate and drying it. Suitable metal oxide particles include zinc oxide and titanium oxide particles. . The conductive particles may be provided with a coating layer on the surface. Examples of the solvent used in the conductive layer coating solution include alcohols, ketones, sulfoxides, ethers, esters, aliphatic halogenated hydrocarbons, and aromatic compounds.

  The volume resistivity of the conductive particles is preferably in the range of 0.1 Ω · cm to 1000 Ω · cm, and more preferably in the range of 1 Ω · cm to 1000 Ω · cm. This volume resistivity is a value obtained by measurement using a resistance measuring apparatus Loresta AP manufactured by Mitsubishi Oil Corporation. As a measurement sample, a coin is used that is hardened with a pressure of 49 MPa. The volume average particle diameter of the conductive particles is preferably in the range of 0.05 μm to 1.00 μm, and more preferably in the range of 0.07 μm to 0.70 μm. The volume average particle diameter is a value measured by a centrifugal sedimentation method. The ratio of the conductive particles in the conductive layer is preferably in the range of 1.0% by mass to 90.0% by mass, particularly in the range of 5.0% by mass to 80.0% by mass with respect to the total mass of the conductive layer. More preferred.

  Examples of the binder resin used for the conductive layer include the following. Phenol resin, polyurethane resin, polyvinyl acetal resin, polyamide resin, polyimide resin, polyamideimide resin, polyamic acid resin, epoxy resin, acrylic resin, melamine resin, polyester resin. These can be used singly or in combination of two or more as a mixture or copolymer. These have good adhesion to a cylindrical substrate, improve the dispersibility of conductive particles, and have good solvent resistance after film formation. Among these, a phenol resin, a polyurethane resin, and a polyamic acid resin are preferable.

  Examples of means for roughening the conductive layer and preventing interference fringes include adding particles of roughening material. The roughening material is preferably not resin particles but resin particles having a fixed shape such as a polyhedron or a ball. Examples thereof include particles of a curable resin such as polyurethane resin, alkyd resin, polystyrene resin, silicone resin, epoxy resin, phenol resin, melamine resin. Among them, particles of silicone resin that are difficult to aggregate are preferable. The average particle diameter of the roughening material particles is preferably 1.0 μm to 9.0 μm. .

  The content of the roughening material particles is preferably 10% by mass or more and 30% by mass or less with respect to the total of the conductive particles and the binder resin from the viewpoint of forming a uniform and appropriate rough surface.

  An intermediate layer having a barrier function or an adhesive function is provided between the conductive layer and the charge generation layer. The intermediate layer is formed for the purpose of improving the adhesion of the photosensitive layer, the coating property and the charge injection property from the cylindrical substrate, and protecting the photosensitive layer from electrical breakdown.

  Examples of the resin for forming the intermediate layer include the following. Acrylic resin, allyl resin, alkyd resin, ethyl cellulose resin, ethylene-acrylic acid copolymer, epoxy resin, casein resin, silicone resin, gelatin resin, nylon, phenol resin, butyral resin, polyacrylate resin, polyacetal resin, polyamideimide resin, polyamide Resins such as resin, polyallyl ether resin, polyimide resin, polyurethane resin, polyester resin, polyethylene resin, polycarbonate resin, polystyrene resin, polysulfone resin, polyvinyl alcohol resin, polybutadiene resin, polypropylene resin, urea resin. Further, titanium oxide or aluminum oxide may be included.

  The intermediate layer can be formed by applying an intermediate layer coating solution comprising the above resin and solvent onto the conductive layer and drying it. Examples of the solvent used in the intermediate layer coating solution include alcohols, sulfoxides, ketones, ethers, esters, aliphatic halogenated hydrocarbons, and aromatic compounds.

  The thickness of the intermediate layer is preferably 0.50 μm to 2.50 μm, and more preferably 0.50 μm to 2.00 μm.

  In the case of a multilayer electrophotographic photoreceptor, a charge generation layer is formed on the intermediate layer. For the charge generation layer, use a homogenizer, ultrasonic dispersion, ball mill, vibration ball mill, sand mill, attritor, roll mill, or liquid collision type high-speed disperser together with binder resin and solvent that is 0.3 to 4 times the weight of the charge generation layer. Then, the dispersion can be formed by applying and drying the dispersion.

  Examples of the charge generating material used in the present invention include the following. Selenium-tellurium, pyrylium, thiapyrylium dyes, phthalocyanines, anthanthrone, dibenzpyrenequinone, trisazo, cyanine, disazo, monoazo, indigo, quinacridone, and asymmetric quinocyanine pigments. Among the various charge generating materials described above, phthalocyanine pigments have been widely used in recent years because of their high sensitivity. Representative phthalocyanine pigments include oxytitanium phthalocyanine, chlorogallium phthalocyanine, dichlorotin phthalocyanine, and hydroxygallium phthalocyanine.

  Examples of the binder resin used for the charge generation layer include the following. Acrylic resin, allyl resin, alkyd resin, epoxy resin, diallyl phthalate resin, silicone resin, styrene-butadiene copolymer, cellulose resin, nylon, phenol resin, butyral resin, benzal resin, melamine resin, polyacrylate resin, polyacetal resin, polyamideimide Resin, polyamide resin, polyallyl ether resin, polyarylate resin, polyimide resin, polyurethane resin, polyester resin, polyethylene resin, polycarbonate resin, polystyrene resin, polysulfone resin, polyvinyl acetal resin, polyvinyl methacrylate resin, polyvinyl acrylate resin, polybutadiene resin, Polypropylene resin, methacrylic resin, urea resin, vinyl chloride-vinyl acetate copolymer, vinyl acetate resin , Vinyl chloride resin. In particular, a butyral resin is preferable. These can be used singly or in combination of two or more as a mixture or copolymer.

  The solvent used in the coating solution for the charge generation layer is selected from the solubility and dispersion stability of the binder resin and charge generation material to be used. As the organic solvent, alcohol, sulfoxide, ketone, ether, ester, aliphatic A halogenated hydrocarbon and an aromatic compound are mentioned.

  The thickness of the charge generation layer is preferably 5 μm or less, and more preferably 0.01 μm to 2 μm.

  In addition, various sensitizers, antioxidants, ultraviolet absorbers, plasticizers, and the like can be added to the charge generation layer as necessary.

  A charge transport layer is formed on the charge generation layer. The charge transport layer contains a charge transport material, and examples of the charge transport material include the following. Triarylamine compounds, hydrazone compounds, styryl compounds, stilbene compounds, pyrazoline compounds, oxazole compounds, thiazole compounds, triarylmethane compounds. These charge transport materials may be used alone or in combination of two or more.

  Examples of the binder resin used for the charge transport layer include the following. Acrylic resin, acrylonitrile resin, allyl resin, alkyd resin, epoxy resin, silicone resin, nylon, phenol resin, phenoxy resin, butyral resin, polyacrylamide resin, polyacetal resin, polyamideimide resin, polyamide resin, polyallyl ether resin, polyarylate Resin, polyimide resin, polyurethane resin, polyester resin, polyethylene resin, polycarbonate resin, polystyrene resin, polysulfone resin, polyvinyl butyral resin, polyphenylene oxide resin, polybutadiene resin, polypropylene resin, methacrylic resin, urea resin, vinyl chloride resin, vinyl acetate resin .

  Further, a silicone oil such as dimethyl silicone oil or methylphenyl silicone oil or a silicone resin may be added to the surface layer as a lubricant.

  FIG. 8 is a diagram showing a schematic configuration of the electrophotographic apparatus. Hereinafter, the electrophotographic process will be described with reference to FIG. Reference numeral 101 denotes an electrophotographic photosensitive member as an image carrier, which is driven to rotate at a predetermined peripheral speed in the direction of an arrow about a shaft 101a. The electrophotographic photosensitive member is uniformly charged at a predetermined positive or negative potential on the peripheral surface thereof by the charging means 102 during the rotation process, and then is exposed to light image exposure L (slit exposure / slit) by an image exposure means (not shown) in the exposure unit 103. Laser beam scanning exposure, etc.). As a result, electrostatic latent images corresponding to the exposure images are sequentially formed on the peripheral surface of the electrophotographic photosensitive member.

The electrostatic latent image is then developed with toner by the developing means 104 incorporating the developing sleeve 104 a, and the toner image is transferred between the electrophotographic photosensitive member 101 and the transfer means 105 from a paper feeding unit (not shown) by the transfer means 105. The image is sequentially transferred onto the surface of the transfer material P fed in synchronization with the rotation of the electrophotographic photosensitive member.
The transfer material P that has received the image transfer is separated from the surface of the electrophotographic photosensitive member, introduced into the fixing means 108, undergoes image fixing, and is discharged out of the machine as a copy (copy).

  The surface of the electrophotographic photosensitive member after the image transfer is cleaned by the cleaning means 106 after removal of the transfer residual toner, and is further subjected to charge removal processing by the pre-exposure means 107 and repeatedly used for image formation.

  As the electrophotographic photosensitive member charging means 102, a corona charging device or a contact charging type roller charging device is generally widely used. The same applies to the transfer means 105. Among the components of the electrophotographic apparatus such as the above-described electrophotographic photosensitive member, developing means, and cleaning means, a plurality of elements are integrally combined to form an apparatus unit, and this unit is configured to be detachable from the apparatus main body. You may do it. For example, at least one of a charging unit, a developing unit, and a cleaning unit may be integrally supported together with the electrophotographic photosensitive member to form a unit, and may be configured to be detachable from the apparatus main body using a guide unit such as a rail.

[Example 1]
Hereinafter, the present invention will be described in more detail with reference to specific examples. In addition, "part" in an Example is a mass part.
Molding resin pellets (resin composition pellets) used for the storage box were prepared as follows.
Polypropylene (density 900 kg / m ³ , melting point 170 ° C.): 140 parts Carbon black: 0.336 parts Antistatic agent of formula (1-5): 0.00705 parts Weather-resistant material of formula (6-4): 0. 00681 parts The above materials were mixed and then kneaded in a kneading extruder to obtain resin pellets for molding.
The obtained resin pellets were injection-molded with an injection molding machine at a temperature of 200 ° C. to produce the storage box lid, bottom box and support member shown in FIG. The wall thickness of the lid and the bottom box was 2.5 mm. The content of the antistatic agent and the weather resistant material was measured by LC-MS analysis after extracting the molded product pulverized into a powder form with chloroform. As an LC-MS apparatus, LC-MS (LC: Agilent 1200SL, MS: Agilent 6130) manufactured by Agilent was used. Further, the contents of the antistatic agent and the weathering material were determined by preparing and quantifying a calibration curve of concentration and peak area using a standard substance. Table 1 shows the contents of the antistatic agent and weathering material in the storage box.

Next, the electrophotographic photosensitive member was produced as follows.
An aluminum cylinder having an inner diameter of φ29.00 mm, a wall thickness of 0.8 mm, and a length: 260.5 mm was used as the cylindrical substrate.
Next, 12 parts of titanium oxide conductive particles coated with tin oxide containing 10% by weight of antimony (powder resistance 150 Ω · cm, tin oxide coverage 45% by weight), 4 parts of phenol resin, average particle size 2 A coating solution for a conductive layer was prepared by dispersing 1.60 parts of 0.0 μm silicone resin particles and 22 parts of methanol in a sand mill using a glass bead having a diameter of 1 mm for 3 hours.
The conductive layer coating solution was dip-coated while adjusting the coating speed, and thermally cured at 150 ° C. for 30 minutes to form a conductive layer having a thickness of 20.0 μm.

Next, 1 part of polyamide resin (trade name: Amilan CM8000, manufactured by Toray Industries, Inc.) and 1.9 parts of methoxymethylated 6 nylon resin (trade name: Toresin EF-30T, manufactured by Teikoku Chemical Co., Ltd.) An intermediate layer coating solution was prepared by dissolving in a mixed solvent of methanol 30 parts / n-butanol 25 parts.
This intermediate layer coating solution was dip coated with the coating speed adjusted to a film thickness of 0.50 μm, and dried with hot air at 105 ° C. for 10 minutes to form an intermediate layer on the conductive layer.

Next, chlorogallium phthalocyanine having strong peaks at 7.4 °, 16.6 °, 25.5 ° and 28.2 ° of the Bragg angles (2θ ± 0.2 °) in the characteristic X-ray diffraction of CuKα. 5 parts, a solution comprising 3 parts of polyvinyl butyral resin (trade name: BX-1, manufactured by Sekisui Chemical Co., Ltd.) and 50 parts of cyclohexanone is dispersed for 8 hours in a sand mill using glass beads having a diameter of 1 mm, and then Then, 100 parts of ethyl acetate was added to prepare a charge generation layer coating solution.
This charge generation layer coating solution was dip coated on the intermediate layer and dried at 90 ° C. for 10 minutes to form a charge generation layer having a thickness of 0.15 μm.

下記式で示される構造を有する電荷輸送物質４部、

および下記式で示される構造単位を有するポリエステル樹脂１０部

およびジメチルシリコーンオイル０．１部を、モノクロロベンゼン８０部／ジメトキシメタン２０部の混合溶媒で溶解して、電荷輸送層用塗布液を調製した。 Next, 8 parts of a charge transport material having a structure represented by the following formula:

4 parts of a charge transport material having a structure represented by the following formula:

And 10 parts of a polyester resin having a structural unit represented by the following formula

Then, 0.1 part of dimethyl silicone oil was dissolved in a mixed solvent of 80 parts of monochlorobenzene / 20 parts of dimethoxymethane to prepare a coating solution for a charge transport layer.

  This charge transport layer coating solution was dip coated with the coating speed adjusted to 15.0 μm and dried in hot air at 120 ° C. for 60 minutes to form a charge transport layer on the charge generation layer.

As described above, the gear and flange used in the process cartridge of the laser beam printer (LaserJet 4350) sold by Hewlett-Packard Company are assembled to the produced electrophotographic photosensitive member by the bending caulking method. A unit was made. The produced electrophotographic photosensitive member unit was housed in the above storage box and left for 15 days in a high temperature and high humidity environment (temperature 45 ° C., relative humidity 90%).
As described above, when the additive component of the storage box volatilizes and adheres to the surface of the electrophotographic photosensitive member stored in the storage box, the coefficient of friction of the surface of the electrophotographic photosensitive member increases, and the cleaning blade turns up. Problems occur. If an image is output in this state, a cleaning failure occurs, and image defects such as streaks and unevenness are likely to occur.

  First, the above-mentioned electrophotographic photosensitive member unit was taken out of the storage box, and the dynamic friction coefficient of the surface of the electrophotographic photosensitive member was measured. The dynamic friction coefficient was measured using HEIDON-14 manufactured by Shinto Kagaku Co., Ltd. at a temperature of 30 ° C. and a relative humidity of 55%. The rubber blade used was a urethane blade (rubber hardness 65 °) cut to 5 mm × 25 mm × 2 mm. The rubber blade is brought into contact with the surface of the electrophotographic photosensitive member at an angle of 25 ° under a load of 50 g, and the electrophotographic photosensitive member is moved in parallel at a speed of 50 mm / min. The frictional force acting between the body and the rubber blade was measured as a strain amount of a strain gauge attached to the rubber blade side and converted into a tensile load. The dynamic friction coefficient was obtained from “force applied to the electrophotographic photosensitive member (g)” / “load applied to the blade (g)” when the blade was moving. The dynamic friction coefficient was 0.41.

Next, among the electrophotographic photosensitive member units produced and stored as described above, those having a dynamic friction coefficient not measured were mounted on the process cartridge of the laser beam printer (LaserJet 4350). This process cartridge was installed in the laser beam printer main body, and left in a high temperature and high humidity environment (temperature 35 ° C., relative humidity 80%) for 24 hours. In the high temperature and high humidity environment, an image output test of 10 halftone images was performed with an image formation interval of 5 seconds.
The halftone image output in the above image output test was evaluated for the presence or absence of image defects, but no image defects occurred. The image evaluation criteria are as follows.
A: No image defect.
B: A squeal (slip) at the cleaning blade part occurred irregularly, but there was no image defect.
C: Slight thin streaks and unevenness are generated, but at a level that does not cause a problem in practical use.
D: Clear streaks and unevenness occur.

  Further, the process cartridge after the image output test was taken out from the main body, the electrophotographic photosensitive member unit was further removed from the process cartridge, and the state of the cleaning blade was observed. The evaluation results are shown in Table 2.

[Examples 2 to 8]
A storage box and an electrophotographic photosensitive member were prepared in the same manner as in Example 1 except that the antistatic agent and weathering material of the storage box and their contents were changed as shown in Table 1, and the storage and evaluation were performed respectively. It was. In either case, clear streak and uneven image defects did not occur, and no abnormality was observed in the cleaning blade.
The evaluation results are shown in Table 2.

Example 9
The antistatic agent and weathering material of the storage box and their contents were changed as shown in Table 1, and an antioxidant (IRGANOX 1076; manufactured by Ciba Japan Co., Ltd.) 0 was added to the charge transport layer of the electrophotographic photoreceptor. .5 parts and secondary antioxidant (TPL-R; manufactured by Sumitomo Chemical Co., Ltd.) 0.5 parts, and horizontal line image (line width: 2 dot width; distance between adjacent lines) in the same high temperature and high humidity environment 1 cm) A storage box and an electrophotographic photosensitive member were produced, stored and evaluated in the same manner as in Example 1 except that 10 image outputs were added. As a result, no image defect occurred and no abnormality was observed in the cleaning blade. The evaluation results are shown in Table 2.

Example 10
A storage box and an electrophotographic photosensitive member were prepared, stored and evaluated in the same manner as in Example 1 except that a coating layer of resin pellets was provided on the inner surface of a storage box formed only from polypropylene and carbon black. The evaluation results are shown in Table 2.

Example 11
A storage box and an electrophotography were formed in the same manner as in Example 1 except that a plate material was formed from the molding resin pellets of Example 1 and this plate material was provided on the inner surface of the storage box formed only from polypropylene and carbon black. Photoconductors were prepared, stored and evaluated. The results are shown in Table 2.

[Comparative Example 1]
A storage box and an electrophotographic photoreceptor were prepared, stored and evaluated in the same manner as in Example 1 except that the antistatic agent and weathering material of the storage box and their contents were changed as shown in Table 1. . The cleaning blade squeaked during image output, and a trace of temporary turning was confirmed, but there was no defect in the cleaning blade. In addition, streaky image defects occurred in the image. The evaluation results are shown in Table 2.

[Comparative Example 2]
A storage box and an electrophotographic photosensitive member were produced in the same manner as in Example 9 except that the antistatic agent and weathering material of the storage box and their contents were changed as shown in Table 1, and the same as in Example 9. Storage and evaluation were performed. The cleaning blade squeaked immediately after the start of image output, and the cleaning blade turned over on the 16th sheet. In addition, streak-like image defects occur in the halftone image, and a phenomenon that the outline of the line is blurred occurs in the horizontal line image. The cause of the blur phenomenon is not clear, but the surface of the electrophotographic photosensitive member adheres to an antistatic agent or a weather-resistant material while the electrophotographic photosensitive member is stored in a high temperature and high humidity environment. This may cause partial exposure to moisture, and the antioxidant contained in the charge transport layer may be deteriorated. The results are shown in Table 2.

[Reference Example 1]
A storage box and an electrophotographic photosensitive member were prepared and evaluated in the same manner as in Example 1 except that the antistatic agent and weathering material of the storage box and their contents were changed as shown in Table 1. Since the antistatic agent and the weather-resistant material use high molecular weight type materials represented by the formulas (H-1) and (H-2), blade turning and image defects did not occur. However, the manufacturing cost of the storage box is higher than that of the above embodiment, which is not economical. The evaluation results are shown in Table 2. In addition, CHIMASSORB 944 (molecular weight 2000 thru | or 3100; Ciba Japan Co., Ltd. product) was used as a polymeric material of Formula (H-2). Since the content could not be quantified, it was shown as the amount charged at the time of pellet preparation.

Claims (3)

In a storage box for storing the electrophotographic photoreceptor and / or the electrophotographic photoreceptor unit,
The storage box
At least one selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound represented by the following formula (3), and a compound represented by the following formula (4): Contains at least one selected from the group consisting of a compound represented by the following formula (5), a compound represented by the following formula (6), a compound represented by the following formula (7) and a compound represented by the following formula (8) A molded product made of a resin composition,
Each having a molecular weight of 560 or less,
A storage box, wherein the total content of the compound in the molded product is 86 ppm or more and 200 ppm or less.

In Formula (1), R ₁ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group. X ₁ and X ₂ each represent a linking group represented by the following formula.

In the formula, m is 1 or 2.
A ₁ and A ₂ represent a group selected from the following group.

In the formula, R ₂ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group.

In formula (2), the definitions of X ₃ and X ₄ are the same as the definitions of X ₁ and X ₂ , and the definitions of A ₃ and A ₄ are the same as the definitions of A ₁ and A ₂ .

In formula (3), R ₃ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. n represents an integer of 3 to 11.

In formula (4), R ₄ , R ₅ and R ₆ represent a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 25 carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted carboxylic acid ester group.

In formula (5), R ₇ , R ₈ , R ₉ and R ₁₀ are substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted aryl groups, substituted or unsubstituted alkoxy groups, substituted or unsubstituted aryls. An oxy group or a substituted or unsubstituted carboxylic acid ester group is shown. X ₅ represents an S atom, a divalent carboxylic acid ester group having 1 to 14 carbon atoms, or an alkylene group having 1 to 12 carbon atoms.

In formula (6), R ₁₁ and R ₁₂ represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group.

In formula (7), B ₁ and B ₂ represent an organic group represented by the following formula.

In the formula, R ₁₃ represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group. X ₆ represents an alkylene group having 1 to 12 carbon atoms.

In the formula (8), R ₁₄ and R ₁₅ are hydrogen atom, halogen atom, hydroxy group, substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, substituted or unsubstituted aryl group, substituted or unsubstituted alkoxy group, substituted or An unsubstituted aryloxy group or a substituted or unsubstituted carboxylic ester group is shown. X ₇ represents a single bond or a divalent organic group represented by the following formula.

Q represents an organic group represented by the following formula.

In the formula, R _{16 to} R ₁₉ are a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryl. Indicates an oxy group. In a storage box for storing the electrophotographic photoreceptor and / or the electrophotographic photoreceptor unit,
On at least the inner surface of the storage box,
At least one selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound represented by the following formula (3), and a compound represented by the following formula (4): Contains at least one selected from the group consisting of a compound represented by the following formula (5), a compound represented by the following formula (6), a compound represented by the following formula (7) and a compound represented by the following formula (8) A coating layer made of a resin composition is provided,
Each having a molecular weight of 560 or less,
A storage box, wherein the total content of the compound in the coat layer is 86 ppm or more and 200 ppm or less.

In Formula (1), R ₁ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group. X ₁ and X ₂ each represent a linking group represented by the following formula.

In the formula, m is 1 or 2.
A ₁ and A ₂ represent a group selected from the following group.

In the formula, R ₂ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group.

In formula (2), the definitions of X ₃ and X ₄ are the same as the definitions of X ₁ and X ₂ , and the definitions of A ₃ and A ₄ are the same as the definitions of A ₁ and A ₂ .

In formula (3), R ₃ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. n represents an integer of 3 to 11.

In formula (4), R ₄ , R ₅ and R ₆ represent a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 25 carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted carboxylic acid ester group.

In formula (5), R ₇ , R ₈ , R ₉ and R ₁₀ are substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted aryl groups, substituted or unsubstituted alkoxy groups, substituted or unsubstituted aryls. An oxy group or a substituted or unsubstituted carboxylic acid ester group is shown. X ₅ represents an S atom, a divalent carboxylic acid ester group having 1 to 14 carbon atoms, or an alkylene group having 1 to 12 carbon atoms.

In formula (6), R ₁₁ and R ₁₂ represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group.

In formula (7), B ₁ and B ₂ represent an organic group represented by the following formula.

In the formula, R ₁₃ represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group. X ₆ represents an alkylene group having 1 to 12 carbon atoms.

In the formula (8), R ₁₄ and R ₁₅ are hydrogen atom, halogen atom, hydroxy group, substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, substituted or unsubstituted aryl group, substituted or unsubstituted alkoxy group, substituted or An unsubstituted aryloxy group or a substituted or unsubstituted carboxylic ester group is shown. X ₇ represents a single bond or a divalent organic group represented by the following formula.

Q represents an organic group represented by the following formula.

In the formula, R _{16 to} R ₁₉ are a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryl. Indicates an oxy group. In a storage box for storing the electrophotographic photoreceptor and / or the electrophotographic photoreceptor unit,
When an electrophotographic photosensitive member and / or an electrophotographic photosensitive member unit is housed in the storage box, the gap is formed between the inner surface of the storage box and the electrophotographic photosensitive member and / or the electrophotographic photosensitive member unit. ,
At least one selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound represented by the following formula (3), and a compound represented by the following formula (4): Contains at least one selected from the group consisting of a compound represented by the following formula (5), a compound represented by the following formula (6), a compound represented by the following formula (7) and a compound represented by the following formula (8) Plate material made of resin composition is installed,
Each having a molecular weight of 560 or less,
A storage box, wherein the total content of the compound in the plate material is 86 ppm or more and 200 ppm or less.

In Formula (1), R ₁ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group. X ₁ and X ₂ each represent a linking group represented by the following formula.

In the formula, m is 1 or 2.
A ₁ and A ₂ represent a group selected from the following group.

In the formula, R ₂ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group.

In formula (2), the definitions of X ₃ and X ₄ are the same as the definitions of X ₁ and X ₂ , and the definitions of A ₃ and A ₄ are the same as the definitions of A ₁ and A ₂ .

In formula (3), R ₃ is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. n represents an integer of 3 to 11.

In formula (4), R ₄ , R ₅ and R ₆ represent a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 25 carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted carboxylic acid ester group.

In formula (5), R ₇ , R ₈ , R ₉ and R ₁₀ are substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted aryl groups, substituted or unsubstituted alkoxy groups, substituted or unsubstituted aryls. An oxy group or a substituted or unsubstituted carboxylic acid ester group is shown. X ₅ represents an S atom, a divalent carboxylic acid ester group having 1 to 14 carbon atoms, or an alkylene group having 1 to 12 carbon atoms.

In formula (6), R ₁₁ and R ₁₂ represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group.

In formula (7), B ₁ and B ₂ represent an organic group represented by the following formula.

In the formula, R ₁₃ represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group. X ₆ represents an alkylene group having 1 to 12 carbon atoms.

In the formula (8), R ₁₄ and R ₁₅ are hydrogen atom, halogen atom, hydroxy group, substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, substituted or unsubstituted aryl group, substituted or unsubstituted alkoxy group, substituted or An unsubstituted aryloxy group or a substituted or unsubstituted carboxylic ester group is shown. X ₇ represents a single bond or a divalent organic group represented by the following formula.

Q represents an organic group represented by the following formula.

In the formula, R _{16 to} R ₁₉ are a hydrogen atom, a halogen atom, a hydroxy group, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryl. Indicates an oxy group.

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