JP2017185458A - Cylindrical substrate coating film removing method and electrophotographic photosensitive manufacturing method - Google Patents

Cylindrical substrate coating film removing method and electrophotographic photosensitive manufacturing method Download PDF

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JP2017185458A
JP2017185458A JP2016077014A JP2016077014A JP2017185458A JP 2017185458 A JP2017185458 A JP 2017185458A JP 2016077014 A JP2016077014 A JP 2016077014A JP 2016077014 A JP2016077014 A JP 2016077014A JP 2017185458 A JP2017185458 A JP 2017185458A
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coating film
peripheral surface
outer peripheral
substrate
film removing
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JP6708467B2 (en
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延博 中村
Nobuhiro Nakamura
延博 中村
和子 佐久間
Kazuko Sakuma
和子 佐久間
谷口 貴久
Takahisa Taniguchi
貴久 谷口
達也 山合
Tatsuya Yamaai
達也 山合
藤井 淳史
Junji Fujii
淳史 藤井
晃洋 丸山
Akihiro Maruyama
晃洋 丸山
奥田 篤
Atsushi Okuda
篤 奥田
石塚 由香
Yuka Ishizuka
由香 石塚
和範 野口
Kazunori Noguchi
和範 野口
友紀 山本
Yuki Yamamoto
友紀 山本
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Canon Inc
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Canon Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a coating film removing method that is capable of efficiently removing an unnecessary coating film from the lower outer peripheral surface of a cylindrical substrate.SOLUTION: The coating film removing method for removing a coating film from the lower outer peripheral surface of a cylindrical substrate has: the outer periphery coating film removing member abutting step of abutting so as to form a space by a groove shape and a substrate by using an outer periphery coating film removing member for removing a coating film from the removed part of the outer peripheral surface of the substrate as a coating film removing member, and opposing a surface having the groove shape of the outer periphery coating film removing member to the removed part of the outer peripheral surface of the substrate; the step of supplying a solvent to the space by causing the solvent to ooze up from the lower end of the space; and the outer periphery coating film removing step of removing the coating film from the removed part by relatively rotating the substrate and the outer periphery coating film removing member to rub each other.SELECTED DRAWING: Figure 1

Description

本発明は、浸漬塗布法によって電子写真感光体用塗布液の塗膜を形成した円筒状の基体の長手方向下方の不要な塗膜を除去する方法に関する。   The present invention relates to a method for removing an unnecessary coating film below a longitudinal direction of a cylindrical substrate on which a coating film of a coating solution for an electrophotographic photoreceptor is formed by a dip coating method.

複写機、レーザービームプリンタなどに用いられる電子写真感光体は、例えば円筒状の基体上に導電層、下引き層、電荷発生層や電荷輸送層等が設けられている。このような電子写真感光体の製造方法として、基体上に電子写真感光体を構成する上記各層の塗布液(電子写真感光体用塗布液)の塗膜を形成し、これを加熱や硬化する方法がある。中でも、円筒状の基体を電子写真感光体用塗布液中に例えば基体の軸を鉛直方向にして浸漬し、その後引き上げることにより塗膜を形成する浸漬塗布法がその生産性の高さという点から広く採用されている。しかし、浸漬塗布法では基体下方外周面にも必然的に塗膜が形成される。   An electrophotographic photosensitive member used in a copying machine, a laser beam printer, or the like is provided with a conductive layer, an undercoat layer, a charge generation layer, a charge transport layer, and the like on a cylindrical substrate, for example. As a method for producing such an electrophotographic photosensitive member, a method of forming a coating film of the above-described respective layers constituting the electrophotographic photosensitive member (coating solution for an electrophotographic photosensitive member) on a substrate and heating or curing the coating film. There is. Among them, the dip coating method in which a coating film is formed by immersing a cylindrical substrate in a coating solution for an electrophotographic photosensitive member, for example, with the axis of the substrate in the vertical direction and then pulling it up is from the point of high productivity. Widely adopted. However, in the dip coating method, a coating film is inevitably formed on the lower outer peripheral surface of the substrate.

ここで、電子写真感光体と現像部材(現像スリーブなど)との間の距離を一定に保つための部材(コロ)を電子写真感光体に当接させる構成をとる場合がある。その場合、コロが当接する部分は、摺擦を受けるため、塗膜が存在すると、不均一に剥離されたり摩耗したりするという問題がある。したがって、その部分には塗膜が形成されていないことが必要である。
そこで、円筒状の基体に浸漬塗布法によって塗膜を形成する場合、塗膜形成後に基体下方外周面の不要な塗膜を除去する工程が必要である。
Here, there may be a configuration in which a member (roller) for maintaining a constant distance between the electrophotographic photosensitive member and the developing member (developing sleeve or the like) is brought into contact with the electrophotographic photosensitive member. In that case, since the portion where the roller abuts is rubbed, there is a problem that if the coating film is present, it is peeled off unevenly or worn. Therefore, it is necessary that no coating film is formed on that portion.
Therefore, when forming a coating film on a cylindrical substrate by a dip coating method, a step of removing an unnecessary coating film on the lower outer peripheral surface of the substrate after the coating film formation is necessary.

そのため、感光体下端部の塗膜を除去する装置が提案されている。例えば、特許文献1では、円筒状基体下端内部に挿入した装置から溶剤を吐出し、ブラシで摺擦することで塗布膜を除去する装置が提案されている。特許文献2では、円筒状基体外周面に基体の回転方向上流側の面に切り込みを設けたブレードで摺擦することで塗布膜を除去する装置が提案されている。また、特許文献3では、円筒状基体の内部の塗膜を除去するための、下端が溶剤槽に浸漬し上端が基体の先端に嵌入可能な円柱状の拭取り部材と、前記基体と前記拭取り部材とを相対的に回転させる回転機構とを備えた塗膜除去装置が提案されている。さらに、特許文献4では、電子写真感光体の端部の塗膜を除去し、除去する必要のない塗膜部分の劣化を抑制するために、覆い部材と感光体下端の内周壁の塗膜除去のための多孔質状の除去部材と感光体下端の外周壁の塗膜除去のための樹脂製のプレート材とを備えた塗膜除去装置が提案されている。   Therefore, an apparatus for removing the coating film on the lower end of the photoreceptor has been proposed. For example, Patent Document 1 proposes an apparatus for removing a coating film by discharging a solvent from an apparatus inserted into the lower end of a cylindrical substrate and rubbing with a brush. Patent Document 2 proposes an apparatus for removing a coating film by rubbing with a blade having a notch formed on a surface on the upstream side in the rotation direction of the base body on the outer peripheral surface of the cylindrical base body. In Patent Document 3, a cylindrical wiping member whose lower end is immersed in a solvent tank and whose upper end can be fitted into the tip of the base for removing the coating film inside the cylindrical base, the base and the wipe There has been proposed a coating film removing apparatus provided with a rotation mechanism that relatively rotates a removing member. Furthermore, in Patent Document 4, in order to remove the coating film on the end portion of the electrophotographic photosensitive member and suppress deterioration of the coating film portion that does not need to be removed, the coating member is removed from the covering member and the inner peripheral wall at the lower end of the photosensitive member. There has been proposed a coating film removing apparatus provided with a porous removing member for the purpose and a resin plate material for removing a coating film on the outer peripheral wall at the lower end of the photoreceptor.

特開2001−205178号公報JP 2001-205178 A 特開平7−84382号公報JP 7-84382 A 特開2013−246391号公報JP 2013-246391 A 特開2014−21160号公報JP 2014-21160 A

塗膜を基体上から精度よく除去するには、溶剤の存在下に除去部材で塗膜を摺擦することにより、溶剤で塗膜を溶解しながら洗い流す必要があり、溶剤の供給量が重要である。しかしながら、特許文献1や特許文献2に記載された除去部材では溶剤の供給量が十分でなく、塗膜除去の精度が悪くなる課題があった。また、特許文献3に記載された塗膜除去装置では、回転により溶剤が供給される反面、拭取り部材のみを回転させた場合には、速い回転により溶剤が飛び散るため、基体と拭取り部材とを相対的に回転させる機構が必須となる。さらに、特許文献3に記載された塗膜除去装置において、拭取り部材は周面全体を覆うように接する必要があるため、外周面の塗膜を除去する際には、基体上の塗膜と塗膜を剥離する部分との境界に溶剤が貯留し、塗膜端部が不均一となってしまうという課題を有する。またさらに、特許文献4に記載された塗膜除去装置においては、除去する必要のない塗膜部分の劣化を抑制することはできるものの、塗膜除去部への溶媒の供給量が十分でなく、十分な塗膜の除去の精度という点では依然として課題を有している。   In order to remove the coating film from the substrate with high accuracy, it is necessary to wash away the coating film while dissolving the coating film with the solvent by rubbing the coating film with the removing member in the presence of the solvent, and the supply amount of the solvent is important. is there. However, the removal members described in Patent Document 1 and Patent Document 2 have a problem that the amount of solvent supplied is not sufficient, and the accuracy of removing the coating film is deteriorated. In addition, in the coating film removing apparatus described in Patent Document 3, while the solvent is supplied by rotation, when only the wiping member is rotated, the solvent scatters by fast rotation, so the base and the wiping member A mechanism to relatively rotate the is essential. Furthermore, in the coating film removing apparatus described in Patent Document 3, since the wiping member needs to contact so as to cover the entire circumferential surface, when removing the coating film on the outer circumferential surface, There is a problem that the solvent is stored at the boundary with the part where the coating film is peeled off, and the coating film end portion becomes non-uniform. Furthermore, in the coating film removal apparatus described in Patent Document 4, although the deterioration of the coating film portion that does not need to be removed can be suppressed, the amount of the solvent supplied to the coating film removal unit is not sufficient, There is still a problem in terms of sufficient removal accuracy of the coating film.

本発明の目的は、浸漬塗布法による電子写真感光体用塗布液の塗膜が形成された円筒状の基体下方の外周面の不要な塗膜を、精度よく効率的に塗膜を除去することが可能な円筒状の基体の塗膜除去方法および電子写真感光体の製造方法を提供することである。   An object of the present invention is to accurately and efficiently remove an unnecessary coating film on an outer peripheral surface below a cylindrical substrate on which a coating film of a coating solution for an electrophotographic photoreceptor is formed by a dip coating method. It is an object of the present invention to provide a method for removing a coating film on a cylindrical substrate and a method for producing an electrophotographic photoreceptor.

本発明は、電子写真感光体用塗布液の塗膜が形成された円筒状の基体を鉛直方向に支持し、該基体の外周面の長手方向下方にある被除去部の塗膜を、少なくとも上端部が開放された溝形状を有する外周面塗膜除去部材を用いて除去する塗膜除去方法であって、
該方法が、
該基体の外周面の該被除去部に該外周面塗膜除去部材の該溝形状を有する面を該基体に対向させ、該溝形状と該基体とで空間を形成するように当接する工程、
溶剤が、該空間の下端よりしみ上がることで、該空間に該溶剤を供給する工程、および
該基体と該外周面塗膜除去部材とを相対的に回転させて摺擦し、該被除去部の塗膜を除去する工程、を有することを特徴とする円筒状の基体の塗膜除去方法である。
The present invention supports a cylindrical substrate on which a coating film of a coating solution for an electrophotographic photosensitive member is formed in the vertical direction, and has a coating film on a portion to be removed at the lower end in the longitudinal direction of the outer peripheral surface of the substrate. It is a coating film removing method for removing using an outer peripheral surface coating film removing member having a groove shape with an open part,
The method is
A step of contacting the surface of the outer peripheral surface coating film removing member having the groove shape with the portion to be removed of the outer peripheral surface of the base body so as to be opposed to the base body so as to form a space between the groove shape and the base body;
The solvent oozes from the lower end of the space, the step of supplying the solvent to the space, and the base and the outer peripheral surface coating film removing member are relatively rubbed and rubbed, and the portion to be removed And a step of removing the coating film. The method of removing a coating film on a cylindrical substrate, comprising:

また、本発明は、円筒状の基体に浸漬塗布法により電子写真感光体用塗布液の塗膜を形成する電子写真感光体の製造方法において、
浸漬塗布法により該基体に電子写真感光体用塗布液の塗膜を形成後、上記の塗膜除去方法により該基体の長手方向下方にある塗膜を除去する工程を有する電子写真感光体の製造方法である。
Further, the present invention provides a method for producing an electrophotographic photosensitive member, wherein a coating film of a coating solution for an electrophotographic photosensitive member is formed on a cylindrical substrate by a dip coating method.
Production of an electrophotographic photosensitive member having a step of forming a coating film of a coating solution for an electrophotographic photosensitive member on the substrate by a dip coating method, and then removing a coating film below the longitudinal direction of the substrate by the coating film removing method. Is the method.

本発明によれば、浸漬塗布法による電子写真感光体用塗布液の塗膜が形成された円筒状の基体下方の外周面の不要な塗膜を、精度よく効率的に塗膜を除去することが可能になる。また、該塗膜除去方法を用いて電子写真感光体を製造することにより、基体の不要な領域に塗膜の層が設けられていない電子写真感光体を得ることが可能になる。   According to the present invention, an unnecessary coating film on an outer peripheral surface under a cylindrical substrate on which a coating film of a coating solution for an electrophotographic photoreceptor is formed by a dip coating method can be efficiently and efficiently removed. Is possible. Further, by producing an electrophotographic photosensitive member using the coating film removing method, it is possible to obtain an electrophotographic photosensitive member in which a coating layer is not provided in an unnecessary region of the substrate.

本発明の塗膜除去方法に用いられる塗膜除去装置の全体の概略構成を示す断面図である。It is sectional drawing which shows the schematic structure of the whole coating-film removal apparatus used for the coating-film removal method of this invention. 本発明の塗膜除去方法に用いられる外周面塗膜除去部材の詳細な例(a)〜(h)を示す斜視図である。It is a perspective view which shows the detailed example (a)-(h) of the outer peripheral surface coating-film removal member used for the coating-film removal method of this invention. 本発明の塗膜除去方法に用いられる図2(a)で表わされる外周面塗膜除去部材を基体に当接させたときの上面図である。It is a top view when the outer peripheral surface coating-film removal member represented by Fig.2 (a) used for the coating-film removal method of this invention is made to contact | abut to a base | substrate. 図2(a)で表わされる外周面塗膜除去部材を本発明の塗膜除去方法の範囲外の方法で基体に当接させたときの上面図((a)又は(b))である。It is a top view ((a) or (b)) when the outer peripheral surface coating-film removal member represented by Fig.2 (a) is made to contact | abut to a base | substrate by the method outside the range of the coating-film removal method of this invention. 本発明の塗膜除去方法に用いられる図2(g)で表わされる外周面塗膜除去部材を基体に当接させたときの上面図((a)〜(c))である。It is a top view ((a)-(c)) when the outer peripheral surface coating-film removal member represented by FIG.2 (g) used for the coating-film removal method of this invention is made to contact | abut to a base | substrate. 本発明の塗膜除去方法に用いられる塗膜除去装置の除去部の近傍の概略構成を示す断面図(a)および上面図(b)である。It is sectional drawing (a) and top view (b) which show schematic structure of the vicinity of the removal part of the coating-film removal apparatus used for the coating-film removal method of this invention. 本発明の塗膜除去方法に用いられる塗膜除去装置の除去部の近傍の概略構成を示す断面図(a)および上面図(b)である。It is sectional drawing (a) and top view (b) which show schematic structure of the vicinity of the removal part of the coating-film removal apparatus used for the coating-film removal method of this invention.

本発明は、電子写真感光体用塗布液の塗膜が形成された円筒状の基体を鉛直方向に支持し、該基体の外周面の長手方向下方にある被除去部の塗膜を、少なくとも上端部が開放された溝形状を有する外周面塗膜除去部材を用いて除去する塗膜除去方法であって、
該方法が、
該基体の外周面の該被除去部に該外周面塗膜除去部材の該溝形状を有する面を該基体に対向させ、該溝形状と該基体とで空間を形成するように当接する工程
溶剤が、該空間の下端よりしみ上がることで、該空間に該溶剤を供給する工程、および
該基体と該外周面塗膜除去部材とを相対的に回転させて摺擦し、該被除去部の塗膜を除去する工程、を有することを特徴とする円筒状の基体の塗膜除去方法である。
The present invention supports a cylindrical substrate on which a coating film of a coating solution for an electrophotographic photosensitive member is formed in the vertical direction, and has a coating film on a portion to be removed at the lower end in the longitudinal direction of the outer peripheral surface of the substrate. It is a coating film removing method for removing using an outer peripheral surface coating film removing member having a groove shape with an open part,
The method is
A step of contacting the surface of the outer peripheral surface coating film removing member having the groove shape with the portion to be removed of the outer peripheral surface of the substrate, and contacting the substrate to form a space between the groove shape and the substrate However, when the solvent oozes up from the lower end of the space, the solvent is supplied to the space, and the base and the outer peripheral surface coating film removing member are relatively rotated and rubbed to remove the part to be removed. And a step of removing the coating film. A method of removing a coating film from a cylindrical substrate.

また、本発明は、円筒状の基体に浸漬塗布法により電子写真感光体用塗布液の塗膜を形成する電子写真感光体の製造方法において、
浸漬塗布法により該基体に電子写真感光体用塗布液の塗膜を形成後、上記の円筒状の基体の塗膜除去方法により該基体の長手方向下方にある塗膜を除去する工程を有する電子写真感光体の製造方法である。
Further, the present invention provides a method for producing an electrophotographic photosensitive member, wherein a coating film of a coating solution for an electrophotographic photosensitive member is formed on a cylindrical substrate by a dip coating method.
An electron having a step of forming a coating film of a coating solution for an electrophotographic photosensitive member on the substrate by a dip coating method and then removing a coating film below the longitudinal direction of the substrate by a coating film removing method for the cylindrical substrate. This is a method for producing a photographic photoreceptor.

以下本発明について、図面を用いて詳細に説明する。
本発明の塗膜除去方法に用いられる塗膜除去装置について図1を例にして説明する。図1は、本発明の塗膜除去方法に用いられる塗膜除去装置の全体の概略構成を示す断面図である。
Hereinafter, the present invention will be described in detail with reference to the drawings.
A coating film removing apparatus used in the coating film removing method of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view showing an overall schematic configuration of a coating film removing apparatus used in the coating film removing method of the present invention.

図1に示すように、本発明の塗膜除去方法に用いられる塗膜除去装置は、塗膜が形成された円筒状の基体2を鉛直方向に支持する基体保持部材1を備えている。また該塗膜除去装置は、基体保持部材1によって支持された基体2の長手方向下方の外周面に形成された塗膜を除去する塗膜除去機構を備えている。   As shown in FIG. 1, the coating film removing apparatus used in the coating film removing method of the present invention includes a substrate holding member 1 that supports a cylindrical substrate 2 on which a coating film is formed in the vertical direction. In addition, the coating film removing apparatus includes a coating film removing mechanism that removes a coating film formed on the outer peripheral surface of the substrate 2 supported by the substrate holding member 1 in the longitudinal direction.

塗膜除去機構は支持体8を有し、支持体8は、基体2内に挿入可能に垂直に立設された軸部15と、外周面塗膜除去部材6を保持する外周面塗膜除去部材用保持部材7を有している。回転モーター13により支持体8を回転させることで、軸部15の軸線回りに軸部15と外周面塗膜除去部材用保持部材7とを一体に回転可能となっている。   The coating film removing mechanism has a support 8, and the support 8 is an outer peripheral surface coating film removing member that holds a shaft portion 15 erected vertically so as to be inserted into the base 2 and an outer peripheral surface coating film removing member 6. A member holding member 7 is provided. By rotating the support 8 by the rotation motor 13, the shaft portion 15 and the outer peripheral surface coating film removing member holding member 7 can be rotated integrally around the shaft portion 15.

軸部15は、内部に軸部15を貫通する溶剤供給流路4を有し、上端部には溶剤11が吐出される開口である溶剤供給口3を有している。溶剤11は溶剤供給タンク10より溶剤供給ポンプ12によって支持体8へ送られ、軸部15の内部に設けられた溶剤供給流路4を通って溶剤供給口3から吐出される。このとき、溶剤供給口3(すなわち軸部15の上端)は、基体2および外周面塗膜除去部材6が当接する部位の下端部(すなわち基体2および外周面塗膜除去部材6の溝形状からなる空間の下端部)よりも上方に位置している。   The shaft portion 15 has a solvent supply channel 4 passing through the shaft portion 15 inside, and has a solvent supply port 3 that is an opening through which the solvent 11 is discharged at the upper end portion. The solvent 11 is sent from the solvent supply tank 10 to the support 8 by the solvent supply pump 12, and is discharged from the solvent supply port 3 through the solvent supply channel 4 provided inside the shaft portion 15. At this time, the solvent supply port 3 (that is, the upper end of the shaft portion 15) is formed from the lower end portion (that is, the groove shape of the substrate 2 and the outer peripheral surface coating film removing member 6) where the base body 2 and the outer peripheral surface coating film removing member 6 come into contact. Is located above the lower end of the space.

外周面塗膜除去部材用保持部材7に取り付けられた外周面塗膜除去部材6は、溝形状を有した面が基体2の外周面に当接される。溶剤供給工程において、基体2および外周面塗膜除去部材6の溝形状からなる空間の下端部に、溶剤供給口3から吐出された溶剤11が達すると、基体2の外周面に外周面塗膜除去部材6を当接することにより基体2と外周面塗膜除去部材6の溝形状との間に生じた空間に、毛細管現象により溶剤11がしみ上がることにより供給される。その後、基体2の外周面に外周面塗膜除去部材6が当接した状態で、支持体8を回転させることで、外周面塗膜除去部材6が基体2の外周面を摺擦して、被除去部の塗膜を該溶剤11により溶解しながら除去する。   The outer peripheral surface coating film removing member 6 attached to the outer peripheral surface coating film removing member holding member 7 has a groove-shaped surface in contact with the outer peripheral surface of the substrate 2. In the solvent supply step, when the solvent 11 discharged from the solvent supply port 3 reaches the lower end of the space formed by the groove shape of the substrate 2 and the outer peripheral surface coating film removing member 6, the outer peripheral surface coating film is applied to the outer peripheral surface of the substrate 2. The solvent 11 spills into the space formed between the base 2 and the groove shape of the outer peripheral surface coating film removing member 6 by contacting the removing member 6 by capillary action. Thereafter, the outer peripheral surface coating film removing member 6 rubs the outer peripheral surface of the base body 2 by rotating the support 8 with the outer peripheral surface coating film removing member 6 in contact with the outer peripheral surface of the base body 2. The coating film on the portion to be removed is removed while being dissolved by the solvent 11.

また、溶剤供給口3から吐出された溶剤11を回収する溶剤回収タンク9が設けられ、溶剤回収タンク9で回収された使用済みの溶剤11は、必要に応じて精製等された後、溶剤供給タンク10に送られて、再利用される構成になっていてもよい。   Further, a solvent recovery tank 9 for recovering the solvent 11 discharged from the solvent supply port 3 is provided, and the used solvent 11 recovered in the solvent recovery tank 9 is refined as necessary, and then supplied to the solvent. It may be configured to be sent to the tank 10 and reused.

外周面塗膜除去部材6の詳細な形状を、図2を用いて説明する。
図2には、塗膜除去に用いられる外周面塗膜除去部材6の形状の斜視図を示す。本発明の外周面塗膜除去部材6は、溝形状を有している。溝形状の幅としては、図2(c)のような線状の切り込み形状、図2(a)のような矩形、図2(b)のようなU字型等が挙げられる。また、複数の溝形状を有していても良く、図2(g)のような矩形の溝が2つあるもの、図2(e)のような矩形と線状の切り込みが同時にあるものでもよい。好ましくは、図2(g)のようにそれぞれ独立した溝形状を複数有するものが好ましい。また、図2(a)のように当接させる基体2の鉛直方向に沿って、上から下まで溝形状がつながっていることが好ましい。ただし、図2(f)のように溝形状が途切れているものであっても、少なくとも上端部が開放された溝形状であれば、基体2の下端と溝との接触部に溶剤11が接することにより、該溶剤11は溝形状と基体2により形成された空間にしみ上がることにより供給されるため、本発明の外周面塗膜除去部材6として用いることができる。さらに、図2(d)のように複数の部材を重ね合わせることで、溝形状を設けることで、本発明の外周面塗膜除去部材6としても良い。
The detailed shape of the outer peripheral surface coating film removing member 6 will be described with reference to FIG.
In FIG. 2, the perspective view of the shape of the outer peripheral surface coating-film removal member 6 used for coating-film removal is shown. The outer peripheral surface coating film removing member 6 of the present invention has a groove shape. Examples of the width of the groove shape include a linear cut shape as shown in FIG. 2C, a rectangle as shown in FIG. 2A, and a U-shape as shown in FIG. Further, it may have a plurality of groove shapes, and may have two rectangular grooves as shown in FIG. 2G, or may have both rectangular and linear cuts as shown in FIG. Good. It is preferable to have a plurality of independent groove shapes as shown in FIG. Moreover, it is preferable that the groove | channel shape is connected from the top to the bottom along the perpendicular direction of the base | substrate 2 to contact | abut as shown to Fig.2 (a). However, even if the groove shape is interrupted as shown in FIG. 2 (f), the solvent 11 is in contact with the contact portion between the lower end of the substrate 2 and the groove as long as the groove shape is open at least at the upper end. As a result, the solvent 11 is supplied by soaking into the space formed by the groove shape and the substrate 2 and can therefore be used as the outer peripheral surface coating film removing member 6 of the present invention. Furthermore, it is good also as the outer peripheral surface coating-film removal member 6 of this invention by providing a groove shape by overlapping a some member like FIG.2 (d).

外周面塗膜除去部材6の溝形状の大きさは基体2と当接した状態で、基体2と外周面塗膜除去部材6の溝形状との間に生じた空間の下端部に溶剤11が接した場合に、溶剤11が上記空間内に溜められるような大きさが良い。空間の断面積が大きすぎると、溶剤11が空間の上端までしみ上がらなくなり、溶剤11を十分に供給することができなくなる。好ましい外周面塗膜除去部材6の溝形状の大きさは、外周面塗膜除去部材6の表面と溶剤11との接触角、基体2又は基体2上の塗膜等と溶剤11との接触角、溶剤11の密度等を考慮して決定することができる。好ましくは、幅寸法が0.3mm以上2.0mm以下、奥行き寸法が0.3mm以上3.0mm以下であることが好ましい。より好ましくは幅寸法が0.3mm以上1.0mm以下、奥行き寸法が0.5mm以上2.0mm以下であることが好ましい。外周面塗膜除去部材6の溝形状が前記寸法である場合、溶剤11は20mmの高さまでしみ上がることができる。   The size of the groove shape of the outer peripheral surface coating film removing member 6 is in a state where the outer surface coating film removing member 6 is in contact with the base body 2, and the solvent 11 is formed at the lower end of the space formed between the base body 2 and the groove shape of the outer peripheral surface coating film removing member 6. A size that allows the solvent 11 to be stored in the space when contacting is good. If the cross-sectional area of the space is too large, the solvent 11 does not bleed up to the upper end of the space, and the solvent 11 cannot be supplied sufficiently. A preferable groove shape size of the outer peripheral surface coating film removing member 6 is a contact angle between the surface of the outer peripheral surface coating film removing member 6 and the solvent 11, and a contact angle between the substrate 2 or the coating film on the substrate 2 and the solvent 11. It can be determined in consideration of the density of the solvent 11 and the like. Preferably, the width dimension is 0.3 mm or more and 2.0 mm or less, and the depth dimension is 0.3 mm or more and 3.0 mm or less. More preferably, the width dimension is 0.3 mm to 1.0 mm and the depth dimension is 0.5 mm to 2.0 mm. When the groove shape of the outer peripheral surface coating film removing member 6 is the above-mentioned size, the solvent 11 can soak up to a height of 20 mm.

外周面塗膜除去部材6と基体2との当接の位置関係を、図3、図4を用いて説明する。図3は図2(a)で表わされる外周面塗膜除去部材6を基体2に当接させたときの上面図である。本発明の塗膜除去方法では、図3のように、上記外周面塗膜除去部材6の溝形状を有する面を基体2に対向させて、溝形状と基体2とで空間を形成するように当接させる。そうすると、基体2と外周面塗膜除去部材6の溝形状との間に生じた空間の下端部に達した溶剤11がこの空間にしみ上がり、空間に溶剤11を溜めたまま摺擦することで、効率的な除去が可能となる。図4(a)、図4(b)のように当接させた場合は、溝形状と基体2とで空間を形成できないため、本発明の効果が得られず、効率的な塗膜除去ができない。   The positional relationship of contact between the outer peripheral surface coating film removing member 6 and the base 2 will be described with reference to FIGS. FIG. 3 is a top view when the outer peripheral surface coating film removing member 6 shown in FIG. In the coating film removing method of the present invention, as shown in FIG. 3, the surface having the groove shape of the outer peripheral surface coating film removing member 6 is opposed to the base body 2 so that a space is formed by the groove shape and the base body 2. Make contact. Then, the solvent 11 reaching the lower end portion of the space generated between the base body 2 and the groove shape of the outer peripheral surface coating film removing member 6 soaks into this space, and is rubbed while the solvent 11 is accumulated in the space. , Efficient removal becomes possible. When the contact is made as shown in FIGS. 4A and 4B, a space cannot be formed between the groove shape and the substrate 2, so that the effect of the present invention cannot be obtained, and efficient coating film removal can be achieved. Can not.

また、図2(g)のように複数の溝形状を有する外周面塗膜除去部材6と基体2との当接の位置関係を、図5を用いて説明する。図5は図2(g)で表わされる外周面塗膜除去部材6を基体2に当接させたときの上面図である。本発明の塗膜除去方法では、図5のように、外周面塗膜除去部材6が複数の溝形状を有する場合は、少なくとも1つの溝形状が、溝形状と基体2とで空間を形成できるように基体2に当接させればよい。好ましくは、図5(b)、図5(c)のように、一方の側面に適度な開口があると好ましい。開口があると、塗膜除去の際、基体2と外周面塗膜除去部材6の溝形状との間に生じた空間から染み出した溶剤11が該開口より排出され、新しい溶剤11が基体2と外周面塗膜除去部材6の溝形状との間に生じた空間にしみ上がる。このように、溶剤11がリフレッシュされることにより、除去がより効率的になる。開口は、図5(b)、図5(c)のようにして外周面塗膜除去部材6と基体2との当接の位置関係を調節することで開口を設けてもよいし、図2(h)のように外周面塗膜除去部材6の側面部の一部を凹まして開口を設けても良い。開口を設ける側面は、図5(b)のように外周面塗膜除去部材6の回転方向の上流方向側(すなわち部材の回転方向に対して反対側)の側面に設けるのがより好ましい。また、開口は、溶剤11が上記空間内にある程度溜められるような大きさが良い。開口が大きすぎて前記空間内に全く溶剤11が溜まらない場合は、溶剤11をリフレッシュさせる効果が得られない。   Moreover, the positional relationship of contact | abutting with the outer peripheral surface coating-film removal member 6 and the base | substrate 2 which have several groove shape like FIG.2 (g) is demonstrated using FIG. FIG. 5 is a top view when the outer peripheral surface coating film removing member 6 shown in FIG. In the coating film removing method of the present invention, as shown in FIG. 5, when the outer peripheral surface coating film removing member 6 has a plurality of groove shapes, at least one groove shape can form a space between the groove shape and the substrate 2. In this manner, the base 2 may be brought into contact. Preferably, as shown in FIG. 5B and FIG. 5C, an appropriate opening is provided on one side surface. If there is an opening, the solvent 11 exuded from the space formed between the substrate 2 and the groove shape of the outer peripheral surface coating film removing member 6 is removed from the opening when the coating film is removed, and a new solvent 11 is discharged from the substrate 2. And the space formed between the outer peripheral surface coating film removing member 6 and the groove shape. In this way, the solvent 11 is refreshed, so that the removal becomes more efficient. The opening may be provided by adjusting the positional relationship of contact between the outer peripheral surface coating film removing member 6 and the substrate 2 as shown in FIGS. 5 (b) and 5 (c). As shown in (h), a part of the side surface portion of the outer peripheral surface coating film removing member 6 may be recessed to provide an opening. As shown in FIG. 5B, it is more preferable to provide the side surface on which the opening is provided on the side surface on the upstream side in the rotation direction of the outer peripheral surface coating film removing member 6 (that is, the side opposite to the rotation direction of the member). Moreover, the size of the opening is good so that the solvent 11 can be stored in the space to some extent. If the opening is too large and no solvent 11 accumulates in the space, the effect of refreshing the solvent 11 cannot be obtained.

図1の塗膜除去装置では外周面塗膜除去部材6に供給される溶剤11は基体2の内面を伝わって供給される。図1の塗膜除去装置においては、基体2下方の内周面にも塗膜が形成されていることから、基体2の内周面の塗膜が、基体2の内部に供給される溶剤11により溶解され得る。そして、該塗膜が溶解した溶剤11が外周面に供給されることになる。そのため、内周面塗膜除去部材5を設けることにより、精度よく短時間で基体2の内面の塗膜を除去することができ、かつ、外周面の塗膜の除去精度が良好になる。   In the coating film removing apparatus of FIG. 1, the solvent 11 supplied to the outer peripheral surface coating film removing member 6 is supplied along the inner surface of the substrate 2. In the coating film removing apparatus of FIG. 1, since the coating film is also formed on the inner peripheral surface below the base 2, the solvent 11 supplied to the inside of the base 2 is the coating film on the inner peripheral surface of the base 2. Can be dissolved. Then, the solvent 11 in which the coating film is dissolved is supplied to the outer peripheral surface. Therefore, by providing the inner peripheral surface coating film removing member 5, the coating film on the inner surface of the substrate 2 can be removed with high accuracy in a short time, and the coating accuracy on the outer peripheral surface is improved.

内周面塗膜除去部材5を設けた場合の例を図6を用いて説明する。図6は、本発明の塗膜除去方法に用いられる塗膜除去装置の除去部の近傍の概略構成を示す断面図(図6(a))および上面図(図6(b))である。図6において、図1と同一部材には同じ符号を付し、これらの構成は図1と同様であり、その説明は省略する。   An example in which the inner peripheral surface coating film removing member 5 is provided will be described with reference to FIG. FIG. 6 is a cross-sectional view (FIG. 6 (a)) and a top view (FIG. 6 (b)) showing a schematic configuration in the vicinity of the removing portion of the coating film removing apparatus used in the coating film removing method of the present invention. In FIG. 6, the same members as those in FIG. 1 are denoted by the same reference numerals, and the configuration thereof is the same as that in FIG.

図6に示す塗膜除去装置は、2つの内周面塗膜除去部材5を有する。内周面塗膜除去部材5は軸部15の側面に取り付けられており、軸部15と一緒に回転可能となっている。内周面塗膜除去部材5は、軸部15を基体2に挿入した時に、基体2の内周面に接触するように構成されており、支持体8および軸部15を回転させることで基体2の内面を摺擦して、基体2の内周面に存在している不要な塗膜を除去する機能を果たす。したがって、内周面塗膜除去部材5を有する図6に示す塗膜除去装置を用いることで、基体2の内周面の被除去部の塗膜に内周面塗膜除去部材5を当接すること(内周面塗膜除去部材当接工程)が行われる。また、基体2の内周面の被除去部の塗膜に内周面塗膜除去部材5を当接させたまま、基体2と内周面塗膜除去部材5とを相対的に回転させて摺擦し、内周面の被除去部の塗膜の除去(内周面塗膜除去工程)も行うことができる。なお、図6においては、外周面塗膜除去部材6を保持する外周面塗膜除去部材用保持部材7を有する支持体8に設けられた軸部15に内周面塗膜除去部材5が取り付けられているため、内周面塗膜除去工程は、外周面塗膜除去工程と同時に行われることになる。   The coating film removing apparatus shown in FIG. 6 has two inner peripheral surface coating film removing members 5. The inner peripheral surface coating film removing member 5 is attached to the side surface of the shaft portion 15 and is rotatable together with the shaft portion 15. The inner peripheral surface coating film removing member 5 is configured to come into contact with the inner peripheral surface of the base 2 when the shaft portion 15 is inserted into the base 2, and the base 8 is rotated by rotating the support 8 and the shaft portion 15. The inner surface of 2 is rubbed to perform the function of removing an unnecessary coating film present on the inner peripheral surface of the base 2. Therefore, by using the coating film removing apparatus shown in FIG. 6 having the inner circumferential surface coating film removing member 5, the inner circumferential surface coating film removing member 5 is brought into contact with the coating film of the portion to be removed of the inner circumferential surface of the substrate 2. (Inner peripheral surface coating film removing member contact step) is performed. Further, the base body 2 and the inner peripheral surface coating film removing member 5 are relatively rotated while the inner peripheral surface coating film removing member 5 is kept in contact with the coating film on the inner peripheral surface of the base body 2 to be removed. By rubbing, removal of the coating film on the portion to be removed on the inner peripheral surface (inner peripheral surface coating film removing step) can also be performed. In FIG. 6, the inner peripheral surface coating film removing member 5 is attached to the shaft portion 15 provided on the support 8 having the outer peripheral surface coating film removing member holding member 7 that holds the outer peripheral surface coating film removing member 6. Therefore, the inner peripheral surface coating film removing step is performed simultaneously with the outer peripheral surface coating film removing step.

内周面塗膜除去部材5を設ける場合は、図6(b)に示すように、内周面塗膜除去部材5は、外周面塗膜除去部材6と基体2との当接部と溶剤供給口3とを結ぶ直線上を避ける位置に配置されることが好ましい。内周面塗膜除去部材5が、溶剤供給口3と外周面塗膜除去部材6と基体2との当接部とを結ぶ直線上に配置される場合、図6(b)に示す位置関係である場合と比べて、外周面塗膜除去部材6の溝形状と基体2との間に生じた空間に供給される溶剤11の量が減る。そのため、内周面塗膜除去部材5は、溶剤供給口3と外周面塗膜除去部材6と基体2との当接部とを結ぶ直線上を避ける位置に配置されることが好ましい。   When the inner peripheral surface coating film removing member 5 is provided, as shown in FIG. 6 (b), the inner peripheral surface coating film removing member 5 is composed of a contact portion between the outer peripheral surface coating film removing member 6 and the substrate 2, and a solvent. It is preferable to be disposed at a position that avoids a straight line connecting the supply port 3. When the inner peripheral surface coating film removing member 5 is arranged on a straight line connecting the solvent supply port 3, the outer peripheral surface coating film removing member 6 and the contact portion of the substrate 2, the positional relationship shown in FIG. Compared with the case where it is, the quantity of the solvent 11 supplied to the space produced between the groove | channel shape of the outer peripheral surface coating-film removal member 6 and the base | substrate 2 reduces. Therefore, the inner peripheral surface coating film removing member 5 is preferably arranged at a position that avoids a straight line connecting the solvent supply port 3, the outer peripheral surface coating film removing member 6, and the contact portion of the substrate 2.

本発明の塗膜除去方法の一例について、一連の工程を図1の塗膜除去装置を用いて説明する。
まず、浸漬塗布法により外周面に塗膜が形成された円筒状の基体2を、基体保持部材1によって鉛直方向に保持する。
次に、塗膜除去を実施する領域(「被除去部」とも記載する。)の上端が外周面塗膜除去部材6の上端と同じ高さになる位置まで基体2を下降し、軸部15を挿入する。このとき基体2の外周面の被除去部の塗膜の上端から下端まで、外周面塗膜除去部材6の溝形状と基体2とで空間を形成するように当接する(外周面塗膜除去部材当接工程)。
An example of the coating film removing method of the present invention will be described with reference to a series of steps using the coating film removing apparatus shown in FIG.
First, the cylindrical substrate 2 having a coating film formed on the outer peripheral surface thereof by the dip coating method is held in the vertical direction by the substrate holding member 1.
Next, the base body 2 is lowered to a position where the upper end of the region where the coating film is removed (also referred to as “removed portion”) is the same height as the upper end of the outer peripheral surface coating film removing member 6, and the shaft portion 15. Insert. At this time, from the upper end to the lower end of the coating film on the outer peripheral surface of the base body 2, the groove shape of the outer peripheral surface coating film removing member 6 and the base body 2 make contact to form a space (outer peripheral surface coating film removing member) Contact process).

また、溶剤供給ポンプ12を作動させ溶剤供給口3から溶剤11を吐出させることにより、円筒状の基体2の内部に溶剤11を吐出する。前記吐出された溶剤11は、基体2および外周面塗膜除去部材6の溝形状からなる空間の下端部に達することで前記空間にしみ上がり、前記空間に溶剤11が供給される。(溶剤供給工程)。   Further, the solvent 11 is discharged into the cylindrical base 2 by operating the solvent supply pump 12 to discharge the solvent 11 from the solvent supply port 3. The discharged solvent 11 reaches the lower end of the space formed by the groove shape of the base body 2 and the outer peripheral surface coating film removing member 6, soaks into the space, and the solvent 11 is supplied to the space. (Solvent supply process).

そして、この状態で溶剤11を吐出させながら回転モーター13により支持体8を回転させることで、当接させた外周面塗膜除去部材6を回転させ、不要な塗膜を摺擦し、除去を実施する(外周面塗膜除去工程)。所定の時間回転させた後、基体2を引き上げて、一連の塗膜除去工程が終了する。   In this state, the support 8 is rotated by the rotary motor 13 while discharging the solvent 11, thereby rotating the outer peripheral surface coating film removing member 6 that is in contact with it, rubbing and removing unnecessary coating films. Implement (peripheral surface coating film removing step). After rotating for a predetermined time, the substrate 2 is pulled up, and a series of coating film removing steps is completed.

前記外周面塗膜除去部材当接工程において、塗膜除去を行う位置まで基体2を下降する場合、基体2の外周面に外周面塗膜除去部材6が接触しないように外周面塗膜除去部材6を外側方向に移動させて退避させることが好ましい。そのため、外周面塗膜除去部材用保持部材7は、図示していない動作機構により基体2の半径方向の外側方向に外周面塗膜除去部材6が接触しない位置まで移動可能であることが好ましい。   In the outer peripheral surface coating film removing member abutting step, when the substrate 2 is lowered to the position where the coating film is removed, the outer peripheral surface coating film removing member is prevented from coming into contact with the outer peripheral surface of the substrate 2. It is preferable to retract 6 by moving it outward. Therefore, it is preferable that the outer peripheral surface coating film removing member holding member 7 can be moved to a position where the outer peripheral surface coating film removing member 6 is not in contact with the outer side in the radial direction of the base 2 by an operating mechanism (not shown).

詳細な動作としては、基体2を下降して移動している間は、基体2外周面に外周面塗膜除去部材6が接触しないように、外周面塗膜除去部材用保持部材7を基体2の半径方向の外側方向に移動させて退避させる。次に、所定の位置まで基体2を下降し、移動を停止した後、外周面塗膜除去部材用保持部材7を基体2の半径方向の内側方向に移動し、外周面塗膜除去部材6を基体2の外周面に当接させ、支持体8を回転させて塗膜除去を行う。外周面塗膜除去部材用保持部材7を基体2の半径方向の外側方向に移動させずに基体2を下降させると、基体2が外周面塗膜除去部材6の上端部分に接触し押圧するため、外周面塗膜除去部材6の摩耗や変形が起こりやすくなり、塗膜を除去する境界が乱れやすくなる。   As a detailed operation, the outer peripheral surface coating film removing member holding member 7 is placed on the base member 2 so that the outer peripheral surface coating film removing member 6 does not contact the outer peripheral surface of the base member 2 while moving down the base member 2. It moves to the outer side of the radial direction of and retracts. Next, after lowering the base body 2 to a predetermined position and stopping the movement, the outer peripheral surface coating film removing member holding member 7 is moved inward in the radial direction of the base body 2 and the outer peripheral surface coating film removing member 6 is moved. The coating is removed by contacting the outer peripheral surface of the substrate 2 and rotating the support 8. When the base body 2 is lowered without moving the outer peripheral surface coating film removing member holding member 7 in the radially outward direction of the base body 2, the base body 2 comes into contact with and presses the upper end portion of the outer peripheral surface coating film removal member 6. The outer peripheral surface coating film removing member 6 is likely to be worn or deformed, and the boundary for removing the coating film is likely to be disturbed.

また、外周面塗膜除去部材6の基体2への当接の位置としては、溶剤11が外周面塗膜除去部材6と基体2で形成された空間をしみ上がり、塗膜除去を効率的に行うために、外周面塗膜除去部材6の下端が基体2の下端とほぼ同じか、又は、より下方に位置している必要がある。ただし、外周面塗膜除去部材6の下端が基体2下端よりわずかに上方に位置していても、溶剤11が基体2外周面に回り込んでしみ上がることができればよい。外周面塗膜除去部材6の下端が基体2の下端より下方に位置している方が、溶剤11が当接部をしみ上がりやすく塗膜除去が効率的になるので好ましい。   Further, as the position of contact of the outer peripheral surface coating film removing member 6 with the base 2, the solvent 11 oozes up the space formed by the outer peripheral surface coating film removing member 6 and the base 2, so that the coating film can be removed efficiently. In order to do this, it is necessary that the lower end of the outer peripheral surface coating film removing member 6 is substantially the same as the lower end of the base 2 or located below. However, even if the lower end of the outer peripheral surface coating film removing member 6 is located slightly above the lower end of the base body 2, it is sufficient that the solvent 11 can wrap around the outer peripheral surface of the base body 2. The lower end of the outer peripheral surface coating film removing member 6 is preferably located below the lower end of the substrate 2 because the solvent 11 is likely to ooze up the contact portion and the coating film removal becomes efficient.

前記溶剤供給工程で溶剤11は基体2の内部に吐出される。この溶剤11は、軸部15の上部に位置する、下方に向かって漸次径が大きくなるテーパ面を経由して基体2の内周面に伝わる。そして、基体2の内周面を流れ落ちて基体2の下端部に達し、基体2と外周面塗膜除去部材6の溝形状との間に生じた空間の下端部から該空間にしみ上がることで、基体2の外周面の被除去部に供給される。   In the solvent supply step, the solvent 11 is discharged into the substrate 2. The solvent 11 is transmitted to the inner peripheral surface of the base body 2 via a tapered surface located at the upper portion of the shaft portion 15 and gradually decreasing in diameter. Then, it flows down the inner peripheral surface of the base body 2 to reach the lower end portion of the base body 2, and soaks into the space from the lower end portion of the space formed between the base body 2 and the groove shape of the outer peripheral surface coating film removing member 6. Then, it is supplied to a portion to be removed on the outer peripheral surface of the base 2.

なお、前記外周面塗膜除去工程において被除去部を外周面塗膜除去部材6により摺擦しているときに、溶剤供給口3は溶剤11を常に吐出しても良いし断続的に吐出しても良い。また、基体2を所定位置に移動するために上下動させている時など外周面塗膜除去工程の前や後に、吐出していても良い。また、溶剤11の供給方法としては、上記のような方法の他に、溶剤11中に基体2の下端部や外周面塗膜除去部材6を浸漬して供給する方法や、ノズルなどで直接外周面塗膜除去部材6と基体2との当接部に溶剤11が供給されるように供給する方法などが挙げられる。   When the portion to be removed is rubbed with the outer peripheral surface coating film removing member 6 in the outer peripheral surface coating film removing step, the solvent supply port 3 may always discharge the solvent 11 or intermittently discharge it. May be. Moreover, you may discharge before or after an outer peripheral surface coating-film removal process, such as when the base | substrate 2 is moved up and down in order to move to a predetermined position. In addition to the method described above, the solvent 11 may be supplied by immersing the lower end portion of the substrate 2 or the outer peripheral surface coating film removing member 6 in the solvent 11 and supplying the solvent 11 directly by a nozzle or the like. The method of supplying so that the solvent 11 may be supplied to the contact part of the surface coating film removal member 6 and the base | substrate 2 is mentioned.

溶剤11中に基体2の下端部や外周面塗膜除去部材6を浸漬して供給する具体例を、図7を用いて説明する。図7は、本発明の塗膜除去方法に用いられる塗膜除去装置の除去部の近傍の概略構成を示す断面図(図7(a))および上面図(図7(b))である。図1と同一部材には同じ符号を付し、これらの構成は図1と同様であり、その説明は省略する。   A specific example in which the lower end portion of the substrate 2 and the outer peripheral surface coating film removing member 6 are dipped and supplied in the solvent 11 will be described with reference to FIG. FIG. 7 is a cross-sectional view (FIG. 7 (a)) and a top view (FIG. 7 (b)) showing a schematic configuration in the vicinity of the removing portion of the coating film removing apparatus used in the coating film removing method of the present invention. The same members as those in FIG. 1 are denoted by the same reference numerals, and the configuration thereof is the same as that in FIG.

図7に示す塗膜除去装置は、溶剤供給タンク10から溶剤供給ポンプ12によって送られ、溶剤供給口3から吐出された溶剤11が、一時的に貯留される溶剤貯留部16を有する。外周面塗膜除去部材用保持部材7に取り付けられた外周面塗膜除去部材6の溝形状を有した面が外周面に当接した基体2は、基体2および外周面塗膜除去部材6の溝形状からなる空間の下端部が、溶剤貯留部16中に貯留された溶剤11の液面に接するように配置され、基体2および外周面塗膜除去部材6の溝形状からなる空間を形成する。溶剤11は、毛細管現象により、基体2および外周面塗膜除去部材6の溝形状からなる該空間にしみ上がることにより供給される。その後、基体2の外周面に外周面塗膜除去部材6が当接した状態で、支持体8を回転させることで、外周面塗膜除去部材6が基体2の外周面を摺擦して除去する。外周面塗膜除去工程において被除去部を外周面塗膜除去部材6により摺擦しているときに、溶剤供給口3は溶剤11を常に吐出しても良いし断続的に吐出しても良い。溶剤11の吐出により、溶剤貯留部16中からオーバーフローした溶剤11は溶剤回収タンク9で回収される。溶剤11をオーバーフローさせることにより、溶剤貯留部16中の溶剤11の液面の高さを一定にすることができ、常に安定して基体2および外周面塗膜除去部材6の溝形状からなる空間の下端部を溶剤11に浸漬することが可能となる。   The coating film removing apparatus shown in FIG. 7 has a solvent reservoir 16 in which the solvent 11 sent from the solvent supply tank 10 by the solvent supply pump 12 and discharged from the solvent supply port 3 is temporarily stored. The substrate 2 having the groove-shaped surface of the outer peripheral surface coating film removing member 6 attached to the outer peripheral surface coating film removing member holding member 7 is in contact with the outer peripheral surface of the substrate 2 and the outer peripheral surface coating film removing member 6. The lower end portion of the groove-shaped space is disposed so as to be in contact with the liquid surface of the solvent 11 stored in the solvent storage portion 16 to form a space formed by the groove shape of the substrate 2 and the outer peripheral surface coating film removing member 6. . The solvent 11 is supplied by soaking into the space formed by the groove shape of the base 2 and the outer peripheral surface coating film removing member 6 by a capillary phenomenon. Thereafter, the outer peripheral surface coating film removing member 6 is rubbed and removed on the outer peripheral surface of the base body 2 by rotating the support 8 with the outer peripheral surface coating film removing member 6 being in contact with the outer peripheral surface of the base body 2. To do. When the part to be removed is rubbed with the outer peripheral surface coating film removing member 6 in the outer peripheral surface coating film removing step, the solvent supply port 3 may always discharge the solvent 11 or may discharge it intermittently. . Due to the discharge of the solvent 11, the solvent 11 overflowed from the solvent storage unit 16 is recovered in the solvent recovery tank 9. By overflowing the solvent 11, the height of the liquid surface of the solvent 11 in the solvent reservoir 16 can be made constant, and the space consisting of the groove shape of the base body 2 and the outer peripheral surface coating film removing member 6 is always stable. It is possible to immerse the lower end of the substrate in the solvent 11.

本発明の塗膜除去方法で使用する溶剤11としては、特に限定されないが、塗膜を溶解又は膨潤しうるものが望ましい。   Although it does not specifically limit as the solvent 11 used with the coating-film removal method of this invention, The thing which can melt | dissolve or swell a coating film is desirable.

外周面塗膜除去部材6の材質は、耐摩耗性および耐溶剤性を考慮して選択でき、ポリエチレン、ポリエステル、ポリプロピレン、ポリイミド等の樹脂、エチレンプロピレンゴム、エチレンプロピレンジエンゴム、ブチルゴム、フッ素系ゴム等のゴムを使用することができる。   The material of the outer peripheral surface coating film removing member 6 can be selected in consideration of wear resistance and solvent resistance. Resin such as polyethylene, polyester, polypropylene, polyimide, ethylene propylene rubber, ethylene propylene diene rubber, butyl rubber, fluorine rubber Etc. Rubber can be used.

外周面塗膜除去部材6の形状としては、当接部へ溶剤11がしみ上がりやすい溝形状を形成できること、連続使用時に汚れが外周面塗膜除去部材6に溜まりにくいこと、塗膜を除去する面と除去しない面の境界が乱れにくいなどの点からブレード状のものが好ましい。   As the shape of the outer peripheral surface coating film removing member 6, it is possible to form a groove shape in which the solvent 11 is likely to ooze up to the contact portion, to prevent dirt from collecting on the outer peripheral surface coating film removing member 6 during continuous use, and to remove the coating film. A blade-like one is preferable in that the boundary between the surface and the surface not to be removed is less likely to be disturbed.

内周面塗膜除去部材5の材質は、耐摩耗性および耐溶剤性を考慮して選択できる。上記外周面塗膜除去部材6と同様に、ポリエチレン、ポリエステル、ポリプロピレン、ポリイミド等の樹脂、エチレンプロピレンゴム、エチレンプロピレンジエンゴム、ブチルゴム、フッ素系ゴム等のゴムを使用することができる。   The material of the inner peripheral surface coating film removing member 5 can be selected in consideration of wear resistance and solvent resistance. Similarly to the outer peripheral surface coating film removing member 6, resins such as polyethylene, polyester, polypropylene, and polyimide, and rubbers such as ethylene propylene rubber, ethylene propylene diene rubber, butyl rubber, and fluorine rubber can be used.

内周面塗膜除去部材5の形状は、ブレード状、ブラシ状、不織布などの布状体など特に限定されず適宜選択可能である。連続使用時に汚れが内周面塗膜除去部材5に溜まりにくいことなどの点からブレード状のものが好ましい。   The shape of the inner peripheral surface coating film removing member 5 is not particularly limited, such as a blade-like shape, a brush-like shape, or a cloth-like shape such as a nonwoven fabric, and can be appropriately selected. A blade-like one is preferred from the standpoint that dirt does not easily accumulate on the inner peripheral surface coating film removing member 5 during continuous use.

図1、図6および図7において外周面塗膜除去部材6は、2つ設けられているが、1つ又は3つ以上設けられていても良い。また、図6において、内周面塗膜除去部材5は2つ設けられているが、1つ又は3つ以上設けられても良い。   1, 6, and 7, two outer peripheral surface coating film removing members 6 are provided, but one or three or more may be provided. In FIG. 6, two inner peripheral surface coating film removing members 5 are provided, but one or three or more members may be provided.

回転モーター13により支持体8を回転する速度は、適宜設定することができる。回転速度が速いほど除去にかかる時間が短く済むが、あまりに早すぎると塗膜除去部材に負荷がかかりすぎて、塗膜除去部材が変形し破損するおそれがある。   The speed at which the support 8 is rotated by the rotary motor 13 can be set as appropriate. The faster the rotation speed, the shorter the time required for removal. However, if the rotation speed is too fast, the coating film removing member is overloaded, and the coating film removing member may be deformed and broken.

基体2上に浸漬塗布法を用いて複数の層が形成される場合には、本発明の塗膜除去方法は、必要に応じて、基体2上に形成される各層のうち一部の層についてのみ実施してもよいし、全部の層について実施してもよい。また、複数の層について本発明の塗膜除去方法を行う場合は、各層の塗膜を形成するたびに塗膜を除去してもよいし、いくつかの乾燥塗膜を順次形成した後、一度に塗膜を除去してもよい。   When a plurality of layers are formed on the substrate 2 using the dip coating method, the coating film removing method of the present invention can be applied to some of the layers formed on the substrate 2 as necessary. May be performed only on all layers. Moreover, when performing the coating film removal method of the present invention for a plurality of layers, the coating film may be removed every time a coating film of each layer is formed, or after several dry coating films are formed in order, The coating film may be removed.

次に、上記塗膜除去方法を用いた本発明の電子写真感光体の製造方法について、説明する。
本発明の電子写真感光体の製造方法で製造される電子写真感光体は、円筒状の基体、および基体上に形成された電荷発生物質および電荷輸送物質を含有する感光層を有する。感光層は、基体側から電荷発生物質を含有する電荷発生層と電荷輸送物質を含有する電荷輸送層をこの順に積層してなるものでも、電荷発生物質と電荷輸送物質を同一の層に含有させてなるものでもよい。基体上に感光層を直接設けると、感光層の剥がれが生じたり、基体の表面の欠陥(傷などの形状的欠陥又は不純物などの材質的欠陥)が画像にそのまま反映され、黒点状や白抜け状の画像欠陥が生じたりする場合がある。これらの問題を解消するために、下引き層を感光層と基体との間に有することが好ましい。
Next, a method for producing the electrophotographic photosensitive member of the present invention using the coating film removing method will be described.
The electrophotographic photoreceptor produced by the method for producing an electrophotographic photoreceptor of the present invention has a cylindrical substrate, and a photosensitive layer containing a charge generating material and a charge transport material formed on the substrate. Even if the photosensitive layer is formed by laminating a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material in this order from the substrate side, the charge generation material and the charge transport material are contained in the same layer. It may be. If the photosensitive layer is directly provided on the substrate, the photosensitive layer may be peeled off, or defects on the surface of the substrate (such as defects such as scratches or material defects such as impurities) will be directly reflected in the image, resulting in black spots or white spots. Image defects may occur. In order to solve these problems, it is preferable to have an undercoat layer between the photosensitive layer and the substrate.

〔円筒状の基体〕
円筒状の基体としては、導電性を有するもの(導電性基体)が好ましく、例えば、アルミニウム、ニッケル、銅、金、鉄などの金属又は合金製の基体を用いることができる。ポリエステル樹脂、ポリカーボネート樹脂、ポリイミド樹脂、ガラスなどの絶縁性基体上にアルミニウム、銀、金などの金属の薄膜を形成した基体、又は酸化インジウム、酸化スズなどの導電性材料の薄膜を形成した基体が挙げられる。
円筒状の基体の表面には、電気的特性の改善や干渉縞の抑制のため、陽極酸化などの電気化学的な処理や、湿式ホーニング処理、ブラスト処理、切削処理などを施してもよい。
[Cylindrical substrate]
As the cylindrical substrate, a conductive substrate (conductive substrate) is preferable. For example, a substrate made of metal or alloy such as aluminum, nickel, copper, gold, iron, or the like can be used. A substrate in which a thin film of a metal such as aluminum, silver or gold is formed on an insulating substrate such as polyester resin, polycarbonate resin, polyimide resin or glass, or a substrate in which a thin film of a conductive material such as indium oxide or tin oxide is formed. Can be mentioned.
The surface of the cylindrical substrate may be subjected to electrochemical treatment such as anodic oxidation, wet honing treatment, blast treatment, cutting treatment, etc. in order to improve electrical characteristics and suppress interference fringes.

〔導電層(第一中間層)〕
基体と下引き層との間に、導電層を設けてもよい。導電層は、導電性粒子を樹脂に分散させた導電層用塗布液(第一中間層用塗布液)の塗膜を基体上に形成し、塗膜を乾燥させることで得られる。導電性粒子としては、たとえば、カーボンブラック、アセチレンブラックや、アルミニウム、ニッケル、鉄、ニクロム、銅、亜鉛、銀のような金属粉や、導電性酸化スズ、ITOのような金属酸化物粉体が挙げられる。
また、樹脂としては、例えば、ポリエステル樹脂、ポリカーボネート樹脂、ポリビニルブチラール樹脂、アクリル樹脂、シリコーン樹脂、エポキシ樹脂、メラミン樹脂、ウレタン樹脂、フェノール樹脂およびアルキッド樹脂が挙げられる。
導電層用塗布液の溶剤としては、例えば、エーテル系溶剤、アルコール系溶剤、ケトン系溶剤および芳香族炭化水素溶剤が挙げられる。
[Conductive layer (first intermediate layer)]
A conductive layer may be provided between the substrate and the undercoat layer. The conductive layer is obtained by forming a coating film of a conductive layer coating liquid (first intermediate layer coating liquid) in which conductive particles are dispersed in a resin on a substrate and drying the coating film. Examples of the conductive particles include carbon black, acetylene black, metal powder such as aluminum, nickel, iron, nichrome, copper, zinc, and silver, and metal oxide powder such as conductive tin oxide and ITO. Can be mentioned.
Examples of the resin include polyester resin, polycarbonate resin, polyvinyl butyral resin, acrylic resin, silicone resin, epoxy resin, melamine resin, urethane resin, phenol resin, and alkyd resin.
Examples of the solvent for the conductive layer coating solution include ether solvents, alcohol solvents, ketone solvents, and aromatic hydrocarbon solvents.

〔下引き層(第二中間層)〕
支持体側からの感光層側への電荷注入を抑制し、カブリなどの画像欠陥の発生を抑制することを目的として、支持体と感光層との間には下引き層を設けることもできる。
下引き層としては、ポリアミド等の結着樹脂からなる層、結着樹脂に金属酸化物を分散させた層、電子輸送物質を含有させた層などが挙げられる。
電子輸送物質を含有する下引き層の製造方法としては、例えば、まず重合性官能基を有する電子輸送物質、架橋剤および熱可塑性樹脂、並びに場合によってはシリカ粒子を含有する下引き層用塗布液(第二中間層用塗布液)の塗膜を形成する。そして、この塗膜を加熱乾燥させることによって、重合性官能基を有する電子輸送物質、架橋剤を重合させ、下引き層を形成することができる。
[Undercoat layer (second intermediate layer)]
An undercoat layer can be provided between the support and the photosensitive layer for the purpose of suppressing charge injection from the support side to the photosensitive layer side and suppressing the occurrence of image defects such as fog.
Examples of the undercoat layer include a layer made of a binder resin such as polyamide, a layer in which a metal oxide is dispersed in the binder resin, and a layer containing an electron transport material.
As a method for producing an undercoat layer containing an electron transport material, for example, first, an undercoat layer coating solution containing an electron transport material having a polymerizable functional group, a crosslinking agent and a thermoplastic resin, and optionally silica particles. A coating film of (second intermediate layer coating solution) is formed. And by heating-drying this coating film, the electron transport substance which has a polymeric functional group, and a crosslinking agent can be superposed | polymerized and an undercoat layer can be formed.

電子輸送物質としては、例えば、キノン化合物、イミド化合物、ベンズイミダゾール化合物、シクロペンタジエニリデン化合物が挙げられる。重合性官能基としては、ヒドロキシ基、チオール基、アミノ基、カルボキシ基、メトキシ基が挙げられる。重合性官能基は、電子輸送を担う骨格構造に直接結合しても、側鎖(電子輸送を担う骨格構造に結合した置換基)中に存在してもよい。   Examples of the electron transport material include a quinone compound, an imide compound, a benzimidazole compound, and a cyclopentadienylidene compound. Examples of the polymerizable functional group include a hydroxy group, a thiol group, an amino group, a carboxy group, and a methoxy group. The polymerizable functional group may be directly bonded to the skeleton structure responsible for electron transport or may be present in the side chain (substituent bonded to the skeleton structure responsible for electron transport).

架橋剤としては、重合性官能基を有する電子輸送物質や、熱可塑性樹脂と重合又は架橋する化合物が挙げられる。具体的には、山下晋三,金子東助編「架橋剤ハンドブック」大成社刊(1981年)等に記載されている化合物等が挙げられる。   Examples of the crosslinking agent include an electron transport material having a polymerizable functional group and a compound that polymerizes or crosslinks with a thermoplastic resin. Specific examples include compounds described in Shinzo Yamashita, Tosuke Kaneko “Crosslinking Agent Handbook” published by Taiseisha (1981), and the like.

下引き層に用いる架橋剤は、好ましくは、イソシアネート化合物、アミン化合物である。イソシアネート基又はブロックイソシアネート基を2〜6個有しているイソシアネート化合物が好ましい。例えば、トリイソシアネートベンゼン、トリイソシアネートメチルベンゼン、トリフェニルメタントリイソシアネート、リジントリイソシアネートの他、トリレンジイソシアネート、ヘキサメチレンジイソシアネート、ジシクロヘキシルメタンジイソシアネート、ナフタレンジイソシアネート、ジフェニルメタンジイソシアネート、イソホロンジイソシアネート、キシリレンジイソシアネート、2,2,4−トリメチルヘキサメチレンジイソシアネート、メチル−2,6−ジイソシアネートヘキサノエート、ノルボルナンジイソシアネート等のジイソシアネートのイソシアヌレート変性体、ビウレット変性体、アロファネート変性体、トリメチロールプロパンやペンタエリスリトールとのアダクト変性体等が挙げられる。これらの中でもイソシアヌレート変性体とアダクト変性体がより好ましい。
前記ブロックイソシアネート基は、−NHCOX(Xは保護基)という構造を有する基である。Xは、イソシアネート基に導入可能な保護基であれば何れでも良い。
The crosslinking agent used for the undercoat layer is preferably an isocyanate compound or an amine compound. An isocyanate compound having 2 to 6 isocyanate groups or blocked isocyanate groups is preferred. For example, triisocyanate benzene, triisocyanate methylbenzene, triphenylmethane triisocyanate, lysine triisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, xylylene diisocyanate, 2, Isocyanurate-modified products, biuret-modified products, allophanate-modified products of diisocyanates such as 2,4-trimethylhexamethylene diisocyanate, methyl-2,6-diisocyanate hexanoate, norbornane diisocyanate, adduct-modified products with trimethylolpropane and pentaerythritol Etc. Among these, an isocyanurate modified body and an adduct modified body are more preferable.
The blocked isocyanate group is a group having a structure of —NHCOX 1 (X 1 is a protecting group). X 1 may be any protecting group that can be introduced into an isocyanate group.

熱可塑性樹脂としては、例えば、ポリビニルアセタール樹脂、ポリオレフィン樹脂、ポリエステル樹脂、ポリエーテル樹脂、ポリアミド樹脂が挙げられる。   Examples of the thermoplastic resin include polyvinyl acetal resin, polyolefin resin, polyester resin, polyether resin, and polyamide resin.

シリカ粒子としては、ゾルゲル法、水ガラス法などの湿式法や、気相法等の乾式法によって得られるシリカ粒子が挙げられる。また、添加時のシリカ粒子の形状は粉状であってもよいし、溶媒に分散されたスラリー状の状態で添加してもよい。   Examples of the silica particles include silica particles obtained by a wet method such as a sol-gel method or a water glass method, or a dry method such as a gas phase method. Moreover, the shape of the silica particles at the time of addition may be powdery, or may be added in the form of a slurry dispersed in a solvent.

下引き層用塗布液に用いられる溶剤は、アルコール系溶剤、スルホキシド系溶剤、ケトン系溶剤、エーテル系溶剤、エステル系溶剤又は芳香族炭化水素溶剤などが挙げられる。   Examples of the solvent used in the coating solution for the undercoat layer include alcohol solvents, sulfoxide solvents, ketone solvents, ether solvents, ester solvents, and aromatic hydrocarbon solvents.

〔電荷発生層〕
電荷発生層は、基体上、導電層上又は下引き層上に設けられる。
電荷発生層は、電荷発生物質を結着樹脂および溶剤とともに分散して得られる電荷発生層用塗布液の塗膜を形成し、塗膜を乾燥させることによって形成することができる。
分散方法としては、たとえば、ホモジナイザー、超音波、ボールミル、サンドミル、アトライター、ロールミルを用いた方法が挙げられる。
(Charge generation layer)
The charge generation layer is provided on the substrate, the conductive layer, or the undercoat layer.
The charge generation layer can be formed by forming a coating film of a coating solution for a charge generation layer obtained by dispersing a charge generation material together with a binder resin and a solvent, and drying the coating film.
Examples of the dispersion method include a method using a homogenizer, an ultrasonic wave, a ball mill, a sand mill, an attritor, and a roll mill.

電荷発生物質としては、アゾ顔料、ペリレン顔料、アントラキノン誘導体、アントアントロン誘導体、ジベンズピレンキノン誘導体、ピラントロン誘導体、ビオラントロン誘導体、イソビオラントロン誘導体、インジゴ誘導体、チオインジゴ誘導体、金属フタロシアニン、無金属フタロシアニンなどのフタロシアニン顔料や、ビスベンズイミダゾール誘導体などが挙げられる。これらの中でも、アゾ顔料、およびフタロシアニン顔料の少なくとも一方が好ましい。フタロシアニン顔料の中でも、オキシチタニウムフタロシアニン、クロロガリウムフタロシアニン、ヒドロキシガリウムフタロシアニンが好ましい。   Examples of charge generating materials include azo pigments, perylene pigments, anthraquinone derivatives, anthanthrone derivatives, dibenzpyrenequinone derivatives, pyranthrone derivatives, violanthrone derivatives, isoviolanthrone derivatives, indigo derivatives, thioindigo derivatives, metal phthalocyanines, metal-free phthalocyanines, etc. Phthalocyanine pigments and bisbenzimidazole derivatives. Among these, at least one of an azo pigment and a phthalocyanine pigment is preferable. Among the phthalocyanine pigments, oxytitanium phthalocyanine, chlorogallium phthalocyanine, and hydroxygallium phthalocyanine are preferable.

オキシチタニウムフタロシアニンとしては、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)の9.0°、14.2°、23.9°および27.1°に強いピークを有する結晶形のオキシチタニウムフタロシアニン結晶や、ブラッグ角(2θ±0.2°)の9.5°、9.7°、11.7°、15.0°、23.5°、24.1°および27.3°に強いピークを有する結晶形のオキシチタニウムフタロシアニン結晶が好ましい。   Oxytitanium phthalocyanine has a crystal form having strong peaks at 9.0 °, 14.2 °, 23.9 ° and 27.1 ° of the Bragg angle (2θ ± 0.2 °) in CuKα characteristic X-ray diffraction. Oxytitanium phthalocyanine crystals and Bragg angles (2θ ± 0.2 °) of 9.5 °, 9.7 °, 11.7 °, 15.0 °, 23.5 °, 24.1 ° and 27.3 Crystalline oxytitanium phthalocyanine crystals having a strong peak at ° are preferred.

クロロガリウムフタロシアニンとしては、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)の7.4°、16.6°、25.5°および28.2°に強いピークを有する結晶形のクロロガリウムフタロシアニン結晶や、ブラッグ角(2θ±0.2°)の6.8°、17.3°、23.6°および26.9°に強いピークを有する結晶形のクロロガリウムフタロシアニン結晶や、ブラッグ角(2θ±0.2°)の8.7°、9.2°、17.6°、24.0°、27.4°および28.8°に強いピークを有する結晶形のクロロガリウムフタロシアニン結晶が好ましい。   Chlorogallium phthalocyanine has a crystal form having strong peaks at 7.4 °, 16.6 °, 25.5 ° and 28.2 ° of the Bragg angle (2θ ± 0.2 °) in CuKα characteristic X-ray diffraction. Chlorogallium phthalocyanine crystals, crystal forms of chlorogallium phthalocyanine crystals having strong peaks at Bragg angles (2θ ± 0.2 °) of 6.8 °, 17.3 °, 23.6 ° and 26.9 °, Crystalline chlorogallium with strong peaks at 8.7 °, 9.2 °, 17.6 °, 24.0 °, 27.4 ° and 28.8 ° with Bragg angles (2θ ± 0.2 °) Phthalocyanine crystals are preferred.

ヒドロキシガリウムフタロシアニンとしては、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)の7.3°、24.9°および28.1°に強いピークを有する結晶形のヒドロキシガリウムフタロシアニン結晶や、ブラッグ角(2θ±0.2°)の7.5°、9.9°、12.5°、16.3°、18.6°、25.1°および28.3°に強いピークを有する結晶形のヒドロキシガリウムフタロシアニン結晶が好ましい。   Examples of hydroxygallium phthalocyanine include crystalline gallium phthalocyanine crystals having strong peaks at 7.3 °, 24.9 ° and 28.1 ° of the Bragg angle (2θ ± 0.2 °) in CuKα characteristic X-ray diffraction. Strong peaks at 7.5 °, 9.9 °, 12.5 °, 16.3 °, 18.6 °, 25.1 ° and 28.3 ° with Bragg angles (2θ ± 0.2 °) A crystalline form of hydroxygallium phthalocyanine crystal is preferred.

電荷発生層に用いられる結着樹脂としては、例えば、スチレン、酢酸ビニル、塩化ビニル、アクリル酸エステル、メタクリル酸エステル、フッ化ビニリデン、トリフルオロエチレンなどのビニル化合物の重合体および共重合体や、ポリビニルアルコール樹脂、ポリビニルアセタール樹脂、ポリカーボネート樹脂、ポリエステル樹脂、ポリスルホン樹脂、ポリフェニレンオキサイド樹脂、ポリウレタン樹脂、セルロース樹脂、フェノール樹脂、メラミン樹脂、ケイ素樹脂、エポキシ樹脂などが挙げられる。これらの中でも、ポリエステル樹脂、ポリカーボネート樹脂、ポリビニルアセタール樹脂が好ましく、ポリビニルアセタール樹脂がより好ましい。   Examples of the binder resin used for the charge generation layer include polymers and copolymers of vinyl compounds such as styrene, vinyl acetate, vinyl chloride, acrylic acid ester, methacrylic acid ester, vinylidene fluoride, and trifluoroethylene, Examples include polyvinyl alcohol resin, polyvinyl acetal resin, polycarbonate resin, polyester resin, polysulfone resin, polyphenylene oxide resin, polyurethane resin, cellulose resin, phenol resin, melamine resin, silicon resin, and epoxy resin. Among these, a polyester resin, a polycarbonate resin, and a polyvinyl acetal resin are preferable, and a polyvinyl acetal resin is more preferable.

電荷発生層において、電荷発生物質と結着樹脂との質量比率(電荷発生物質/結着樹脂)は、10/1〜1/10の範囲であることが好ましく、5/1〜1/5の範囲であることがより好ましい。電荷発生層用塗布液に用いられる溶剤は、アルコール系溶剤、スルホキシド系溶剤、ケトン系溶剤、エーテル系溶剤、エステル系溶剤又は芳香族炭化水素溶剤などが挙げられる。   In the charge generation layer, the mass ratio of the charge generation material to the binder resin (charge generation material / binder resin) is preferably in the range of 10/1 to 1/10, and is preferably 5/1 to 1/5. A range is more preferable. Examples of the solvent used in the charge generation layer coating liquid include alcohol solvents, sulfoxide solvents, ketone solvents, ether solvents, ester solvents, and aromatic hydrocarbon solvents.

〔電荷輸送層〕
電荷輸送層は、電荷発生層上に設けられる。
電荷輸送層は、電荷輸送物質を結着樹脂および溶剤とともに分散して得られる電荷輸送層用塗布液の塗膜を乾燥することで形成することができる。
(Charge transport layer)
The charge transport layer is provided on the charge generation layer.
The charge transport layer can be formed by drying a coating film of a charge transport layer coating solution obtained by dispersing a charge transport material together with a binder resin and a solvent.

電荷輸送物質は、正孔輸送物質と電子輸送物質に大別される。正孔輸送物質としては、例えば、多環芳香族化合物、複素環化合物、ヒドラゾン化合物、スチリル化合物、ベンジジン化合物、トリフェニルアミン等のトリアリールアミン化合物、又は、これらの化合物から誘導される基を主鎖又は側鎖に有するポリマーが挙げられる。これらの中でもトリアリールアミン化合物、ベンジジン化合物、又はスチリル化合物が好ましい。また、電子輸送物質としては、例えば、キノン化合物、イミド化合物、ベンズイミダゾール化合物、シクロペンタジエニリデン化合物、又は、これらの化合物から誘導される基を主鎖又は側鎖に有するポリマーが挙げられる。   Charge transport materials are roughly classified into hole transport materials and electron transport materials. As the hole transport material, for example, polyaryl aromatic compounds, heterocyclic compounds, hydrazone compounds, styryl compounds, benzidine compounds, triarylamine compounds such as triphenylamine, or groups derived from these compounds are mainly used. Examples thereof include polymers having a chain or a side chain. Among these, a triarylamine compound, a benzidine compound, or a styryl compound is preferable. Examples of the electron transport material include quinone compounds, imide compounds, benzimidazole compounds, cyclopentadienylidene compounds, and polymers having groups derived from these compounds in the main chain or side chain.

電荷輸送層に用いられる結着樹脂としては、例えば、ポリエステル樹脂、ポリカーボネート樹脂、ポリメタクリル酸エステル樹脂、ポリアリレート樹脂、ポリサルホン樹脂、ポリスチレン樹脂などが挙げられる。これらの中でも、ポリカーボネート樹脂およびポリアリレート樹脂が好ましい。   Examples of the binder resin used for the charge transport layer include polyester resin, polycarbonate resin, polymethacrylate resin, polyarylate resin, polysulfone resin, and polystyrene resin. Among these, polycarbonate resin and polyarylate resin are preferable.

電荷輸送層において、電荷輸送物質と結着樹脂との質量比率(電荷輸送物質/結着樹脂)は、10/5〜5/10が好ましく、10/8〜6/10がより好ましい。   In the charge transport layer, the mass ratio of the charge transport material and the binder resin (charge transport material / binder resin) is preferably 10/5 to 5/10, and more preferably 10/8 to 6/10.

電荷輸送層用塗布液に用いられる溶剤は、アルコール系溶剤、スルホキシド系溶剤、ケトン系溶剤、エーテル系溶剤、エステル系溶剤又は芳香族炭化水素溶剤などが挙げられる。   Examples of the solvent used in the charge transport layer coating solution include alcohol solvents, sulfoxide solvents, ketone solvents, ether solvents, ester solvents, and aromatic hydrocarbon solvents.

このような電子写真感光体の製造方法は、電子写真感光体を構成する各層を形成するための電子写真感光体用塗布液(導電層用塗布液、下引き層用塗布液、電荷発生層用塗布液、電荷輸送層用塗布液)に、円筒状の基体を浸漬塗布する。例えば、円筒状の基体を軸が鉛直方向になるように塗布液に浸漬し引き上げることにより、基体上に塗布液の塗膜を形成する。
塗膜を形成後、上記本発明の塗膜除去方法により、基体の長手方向下方に形成された不要な塗膜である被除去部の塗膜を除去する。
被除去部の塗膜を除去した後、残存する塗膜を加熱や硬化することにより、各層が形成される。
Such a method for producing an electrophotographic photosensitive member includes a coating solution for an electrophotographic photosensitive member for forming each layer constituting the electrophotographic photosensitive member (coating solution for conductive layer, coating solution for undercoat layer, charge generating layer). A cylindrical substrate is dip-coated in a coating solution or a coating solution for a charge transport layer. For example, a coating film of the coating solution is formed on the substrate by immersing and lifting the cylindrical substrate in the coating solution so that the axis is in the vertical direction.
After forming the coating film, the coating film on the portion to be removed, which is an unnecessary coating film formed on the lower side in the longitudinal direction of the substrate, is removed by the coating film removing method of the present invention.
After removing the coating film of the portion to be removed, each layer is formed by heating or curing the remaining coating film.

塗膜の除去は、浸漬塗布法により塗膜を1層形成する毎に行ってもよいし、複数の塗膜を順次形成、乾燥した後に、一度に除去してもよい。なお、本発明の電子写真感光体の製造方法においては、少なくとも1層の形成において本発明の塗膜除去方法が用いられればよい。その他の層については、スプレーコーティング法、カーテンコーティング法、スピンコーティング法などの浸漬塗布法以外の塗布方法で塗膜を形成した後に加熱や硬化することにより形成してもよく、また、蒸着等により形成してもよい。   The coating film may be removed every time one layer of the coating film is formed by a dip coating method, or may be removed at a time after a plurality of coating films are formed and dried sequentially. In the method for producing an electrophotographic photoreceptor of the present invention, the coating film removing method of the present invention may be used in the formation of at least one layer. Other layers may be formed by heating or curing after forming a coating film by a coating method other than a dip coating method such as a spray coating method, a curtain coating method, or a spin coating method, or by vapor deposition or the like. It may be formed.

以下、実施例により本発明を具体的に説明する。ただし、本発明は実施例に限定されない。また、以下に記載の「部」は「質量部」を意味する。   Hereinafter, the present invention will be described specifically by way of examples. However, the present invention is not limited to the examples. In addition, “parts” described below means “parts by mass”.

評価は、アルミニウム製円筒状基体上に下記の実施例に示す組成から成る第一中間層用塗布液、第二中間層用塗布液、電荷発生層用塗布液、電荷輸送層用塗布液を浸漬塗布し、円筒状基体下方外周面の塗膜除去を実施し、基体外周面の塗膜の除去度合いを目視観察することで行った。   Evaluation was performed by immersing a coating solution for a first intermediate layer, a coating solution for a second intermediate layer, a coating solution for a charge generation layer, and a coating solution for a charge transport layer, having the composition shown in the following examples, on an aluminum cylindrical substrate. It was applied by removing the coating film on the lower outer peripheral surface of the cylindrical substrate, and visually observing the degree of removal of the coating film on the outer peripheral surface of the substrate.

(実施例1)
長さ260.5mmおよび外径30mmのアルミニウムシリンダー(JIS−A3003、アルミニウム合金)を基体2(導電性基体)とした。
Example 1
An aluminum cylinder (JIS-A3003, aluminum alloy) having a length of 260.5 mm and an outer diameter of 30 mm was used as the substrate 2 (conductive substrate).

(第二中間層用塗布液1の調整)
下記式(A11)で示される電子輸送物質10部、ブロックされたイソシアネート化合物(商品名:SBN−70D、旭化成ケミカルズ(株)製)13.5部、樹脂として、ポリビニルアセタール樹脂(商品名:KS−5Z、積水化学工業(株)製)1.5部、触媒としてヘキサン酸亜鉛(II)(商品名:ヘキサン酸亜鉛(II)、三津和化学薬品(株)製)0.05部を、1−メトキシ−2−プロパノール100部とテトラヒドロフラン100部の混合溶媒に溶解し、これに添加剤として平均一次粒子径9−15nmの有機溶媒分散コロイダルシリカスラリー(商品名:IPA−ST−UP、日産化学工業(株)製)3.3部を加え1時間撹拌し、第二中間層用塗布液1を調製した。

Figure 2017185458
(Adjustment of coating solution 1 for the second intermediate layer)
10 parts of an electron transport material represented by the following formula (A11), 13.5 parts of a blocked isocyanate compound (trade name: SBN-70D, manufactured by Asahi Kasei Chemicals Corporation), a polyvinyl acetal resin (trade name: KS) as a resin -5Z, manufactured by Sekisui Chemical Co., Ltd.) 1.5 parts, zinc hexanoate (II) as a catalyst (trade name: zinc hexanoate (II), manufactured by Mitsuwa Chemicals Co., Ltd.) 0.05 part, Dissolved in a mixed solvent of 100 parts of 1-methoxy-2-propanol and 100 parts of tetrahydrofuran, an organic solvent-dispersed colloidal silica slurry having an average primary particle size of 9-15 nm (trade name: IPA-ST-UP, Nissan) 3.3 parts of Chemical Industry Co., Ltd.) was added and stirred for 1 hour to prepare a second intermediate layer coating solution 1.
Figure 2017185458

この第二中間層用塗布液1を上記アルミニウム製の円筒状の基体2上に浸漬塗布して、塗膜を形成した。なお、塗膜の膜厚は、塗膜を40分間160℃で加熱し、硬化(重合)させた場合に得られる層の中央部の膜厚(厚さ)が0.7μmとなるようにした。その後、基体2下方の外周面の塗膜除去を、下記のようにして行った。   The coating solution 1 for the second intermediate layer was dip-coated on the aluminum cylindrical substrate 2 to form a coating film. In addition, the film thickness of the coating film was such that the film thickness (thickness) at the center of the layer obtained when the coating film was heated at 160 ° C. for 40 minutes and cured (polymerized) was 0.7 μm. . Then, the coating film removal of the outer peripheral surface under the base | substrate 2 was performed as follows.

塗膜除去装置として、図6に示すように外周面塗膜除去部材6と内周面塗膜除去部材5をそれぞれ二つ設け、軸部15の上端にある溶剤供給口3で基体2内部から溶剤11を供給する装置を使用した。外周面塗膜除去部材6の形状としては、図2(a)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法3mm、奥行き寸法8mm、高さ寸法20mmで、溝形状の寸法は、幅寸法0.5mm、奥行き寸法1.5mmであった。また、上面図である図6(b)に示すように、内周面塗膜除去部材5は、溶剤供給口3と外周面塗膜除去部材6と基体2との当接部とを結ぶ直線上を避ける位置に配置された。   As the coating film removing apparatus, two outer peripheral surface coating film removing members 6 and two inner peripheral surface coating film removing members 5 are provided as shown in FIG. An apparatus for supplying the solvent 11 was used. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a shape shown in FIG. The overall dimensions of the rubber blade were a width dimension of 3 mm, a depth dimension of 8 mm, and a height dimension of 20 mm, and the groove-shaped dimensions were a width dimension of 0.5 mm and a depth dimension of 1.5 mm. 6B, which is a top view, the inner peripheral surface coating film removing member 5 is a straight line connecting the solvent supply port 3, the outer peripheral surface coating film removing member 6 and the contact portion of the substrate 2. Arranged to avoid the top.

まず、外周面塗膜除去部材6を基体2が下降した際に触れないように半径方向の外側方向に退避した。次に第二中間層用塗布液2を浸漬塗布した基体2を鉛直方向に支持し、下降させた。
基体2の下端から15mmまでの領域に外周面塗膜除去部材6が当接するように、基体2の下端から15mmの位置に外周面塗膜除去部材6の上端がそろう位置で基体2の下降を停止した。そして、外側方向に退避していた外周面塗膜除去部材6を半径方向の内側方向に移動させ、外周面塗膜除去部材6を基体2の外周面に当接させた。このとき、外周面塗膜除去部材6の下端5mm部分が基体2下端から下方に伸びていた。また、外周面塗膜除去部材6と基体2との当接位置関係は、図3に示すように、外周面塗膜除去部材6の溝形状を有する面が基体2と当接し、前記溝形状と前記基体2とで空間を形成するように当接した。軸部15の上端にある溶剤供給口3から溶剤11としてシクロヘキサノンを吐出しながら、外周面塗膜除去部材6を15秒間、45rpmの速度で回転させて摺擦し、塗膜の除去を行った。
First, the outer peripheral surface coating film removing member 6 was retracted radially outward so as not to touch when the base body 2 was lowered. Next, the substrate 2 on which the second intermediate layer coating solution 2 was dip-coated was supported in the vertical direction and lowered.
The base 2 is lowered at a position where the upper end of the outer peripheral surface coating film removing member 6 is aligned with the upper end of the outer peripheral surface coating film removing member 6 at a position 15 mm from the lower end of the base body 2 so that the outer peripheral surface coating film removing member 6 is in contact with a region from the lower end of the base body 2 to 15 mm. Stopped. Then, the outer peripheral surface coating film removing member 6 retracted in the outer direction was moved inward in the radial direction, and the outer peripheral surface coating film removing member 6 was brought into contact with the outer peripheral surface of the base 2. At this time, the lower end 5 mm portion of the outer peripheral surface coating film removing member 6 extended downward from the lower end of the base 2. Further, the contact position relationship between the outer peripheral surface coating film removing member 6 and the base 2 is such that the surface having the groove shape of the outer peripheral surface coating film removing member 6 contacts the base body 2 as shown in FIG. And the base 2 so as to form a space. While discharging cyclohexanone as the solvent 11 from the solvent supply port 3 at the upper end of the shaft 15, the outer peripheral surface coating film removing member 6 was rubbed by rotating at a speed of 45 rpm for 15 seconds to remove the coating film. .

これを繰り返して、合計20本の基体2について、第二中間層用塗布液の浸漬塗布法による塗膜の形成と塗膜の除去を行った。また、回転時間を20秒、25秒、30秒に変更した以外は同様にして、それぞれ20本の基体2について、浸漬塗布法による塗膜の形成と塗膜の除去を行った。なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。基体2の外周面の下端から15mm位置までの塗膜の除去度合いの目視による確認結果を表1に示す。除去度合いは以下のようにランク付けした。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。
A:塗膜の拭き残しは確認できす、非常に良好である。
B:塗膜の拭き残しはほとんど確認できず、良好である。
C:塗膜の拭き残しが見られる。
By repeating this, the coating film was formed and the coating film was removed by the dip coating method of the coating solution for the second intermediate layer for a total of 20 substrates 2. Further, in the same manner except that the rotation time was changed to 20 seconds, 25 seconds, and 30 seconds, a coating film was formed and a coating film was removed by dip coating on each of the 20 substrates 2. In removing the coating film, the solvent 11 oozes up the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2 and rubs with the outer peripheral surface coating film removing member 6 to remove the coating film. At all times, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. Table 1 shows the results of visual confirmation of the degree of removal of the coating film from the lower end of the outer peripheral surface of the substrate 2 to the 15 mm position. The removal degree was ranked as follows. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable.
A: The wiping residue of the coating film can be confirmed and is very good.
B: The wiping residue of a coating film can hardly be confirmed and is good.
C: The wiping residue of a coating film is seen.

(実施例2)
(第二中間層用塗布液2の調整)
下記式(A12)で示される電子輸送物質10部、ブロックされたイソシアネート化合物(商品名:SBN−70D、旭化成ケミカルズ(株)製)13.5部、樹脂として、ポリビニルアセタール樹脂(商品名:KS−5Z、積水化学工業(株)製)1.5部、触媒としてヘキサン酸亜鉛(II)(商品名:ヘキサン酸亜鉛(II)、三津和化学薬品(株)製)0.05部を、1−メトキシ−2−プロパノール100部とテトラヒドロフラン100部の混合溶媒に溶解し、第二中間層用塗布液2を調製した。

Figure 2017185458
(Example 2)
(Adjustment of second intermediate layer coating solution 2)
10 parts of an electron transport material represented by the following formula (A12), 13.5 parts of a blocked isocyanate compound (trade name: SBN-70D, manufactured by Asahi Kasei Chemicals Corporation), a polyvinyl acetal resin (trade name: KS) as a resin -5Z, manufactured by Sekisui Chemical Co., Ltd.) 1.5 parts, zinc hexanoate (II) as a catalyst (trade name: zinc hexanoate (II), manufactured by Mitsuwa Chemicals Co., Ltd.) 0.05 part, A second intermediate layer coating solution 2 was prepared by dissolving in a mixed solvent of 100 parts of 1-methoxy-2-propanol and 100 parts of tetrahydrofuran.
Figure 2017185458

この第二中間層用塗布液2を上記アルミニウム製の円筒状の基体2上に浸漬塗布して、塗膜を形成した。なお、塗膜の膜厚は、塗膜を40分間160℃で加熱し、硬化(重合)させた場合に得られる層の中央部の膜厚が0.7μmとなるようにした。その後、基体2下方外周面の塗膜除去を、下記のようにして行った。   The coating solution 2 for the second intermediate layer was dip-coated on the aluminum cylindrical substrate 2 to form a coating film. In addition, the film thickness of the coating film was set so that the film thickness of the central part of the layer obtained when the coating film was heated at 160 ° C. for 40 minutes and cured (polymerized) was 0.7 μm. Then, the coating film removal of the base | substrate 2 lower outer peripheral surface was performed as follows.

塗膜除去装置として、図7に示すように外周面塗膜除去部材6を二つ設け、溶剤供給口3から溶剤11を供給し、溶剤貯留部16に溶剤11を一時的に貯留してオーバーフローする装置を使用した。外周面塗膜除去部材6としては、実施例1と同様のものを使用した。   As shown in FIG. 7, as the coating film removing apparatus, two outer peripheral surface coating film removing members 6 are provided, the solvent 11 is supplied from the solvent supply port 3, and the solvent 11 is temporarily stored in the solvent storage unit 16 to overflow. I used a device to do. As the outer peripheral surface coating film removing member 6, the same one as in Example 1 was used.

まず、外周面塗膜除去部材6を基体2が下降した際に触れないように半径方向の外側方向に退避した。次に第二中間層用塗布液1を浸漬塗布した基体2を鉛直方向に支持し、下降させた。
基体2の下端から15mmまでの領域に外周面塗膜除去部材6が当接するように、基体2の下端から15mmの位置に外周面塗膜除去部材6の上端がそろう位置で基体2の下降を停止した。そして、外側方向に退避していた外周面塗膜除去部材6を半径方向の内側方向に移動させ、外周面塗膜除去部材6を基体2の外周面に当接させた。このとき、外周面塗膜除去部材6の下端5mm部分が基体2下端から下方に伸びており、基体2の下端部および外周面塗膜除去部材6の下端が溶剤11に浸漬していた。また、外周面塗膜除去部材6と基体2との当接位置関係は、図3に示すように、外周面塗膜除去部材6の溝形状を有する面が、溝形状と基体2とで空間を形成するように当接した。溶剤供給口3から溶剤11としてシクロヘキサノンを吐出し、溶剤貯留部16から溶剤11をオーバーフローしながら、外周面塗膜除去部材6を15秒間、45rpmの速度で回転させて摺擦し、塗膜の除去を行った。
First, the outer peripheral surface coating film removing member 6 was retracted radially outward so as not to touch when the base body 2 was lowered. Next, the substrate 2 on which the second intermediate layer coating solution 1 was dip-coated was supported in the vertical direction and lowered.
The base 2 is lowered at a position where the upper end of the outer peripheral surface coating film removing member 6 is aligned with the upper end of the outer peripheral surface coating film removing member 6 at a position 15 mm from the lower end of the base body 2 so that the outer peripheral surface coating film removing member 6 is in contact with a region from the lower end of the base body 2 to 15 mm. Stopped. Then, the outer peripheral surface coating film removing member 6 retracted in the outer direction was moved inward in the radial direction, and the outer peripheral surface coating film removing member 6 was brought into contact with the outer peripheral surface of the base 2. At this time, the lower end 5 mm portion of the outer peripheral surface coating film removing member 6 extended downward from the lower end of the base 2, and the lower end portion of the base 2 and the lower end of the outer peripheral surface coating film removing member 6 were immersed in the solvent 11. Further, the contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2 is such that the surface having the groove shape of the outer peripheral surface coating film removing member 6 is a space between the groove shape and the substrate 2 as shown in FIG. Abutted to form. Cyclohexanone is discharged from the solvent supply port 3 as the solvent 11, and while the solvent 11 overflows from the solvent reservoir 16, the outer peripheral surface coating film removing member 6 is rubbed by rotating at a speed of 45 rpm for 15 seconds. Removal was performed.

これを繰り返して、合計20本の基体2について、第二中間層用塗布液の浸漬塗布法による塗膜の形成と塗膜の除去を行った。また、回転時間を20秒、25秒、30秒に変更した以外は同様にして、それぞれ20本の基体2について、浸漬塗布法による塗膜の形成と塗膜の除去を行った。なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。基体2の外周面の下端から15mm位置までの塗膜の除去度合いの目視による確認結果を表1に示す。除去度合いは以下のようにランク付けした。実施例2においては、除去する必要のない塗膜の部分まで溶剤11が飛び散る液ハネが若干観察された。   By repeating this, the coating film was formed and the coating film was removed by the dip coating method of the coating solution for the second intermediate layer for a total of 20 substrates 2. Further, in the same manner except that the rotation time was changed to 20 seconds, 25 seconds, and 30 seconds, a coating film was formed and a coating film was removed by dip coating on each of the 20 substrates 2. In removing the coating film, the solvent 11 oozes up the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2 and rubs with the outer peripheral surface coating film removing member 6 to remove the coating film. At all times, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. Table 1 shows the results of visual confirmation of the degree of removal of the coating film from the lower end of the outer peripheral surface of the substrate 2 to the 15 mm position. The removal degree was ranked as follows. In Example 2, the liquid splash from which the solvent 11 scatters to the part of the coating film which does not need to be removed was slightly observed.

(実施例3)
外周面塗膜除去部材6の形状を変更した以外は実施例1と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例1と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。外周面塗膜除去部材6の形状としては、図2(c)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法3mm、奥行き寸法8mm、高さ寸法20mmで、中央の線状の溝形状は奥行き寸法1.5mmであった。
(Example 3)
Except that the shape of the outer peripheral surface coating film removing member 6 was changed, the coating film was formed by the dip coating method and the coating film was removed in the same manner as in Example 1, and evaluation was performed in the same manner as in Example 1. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a shape shown in FIG. The overall dimensions of the rubber blade were a width dimension of 3 mm, a depth dimension of 8 mm, a height dimension of 20 mm, and the central linear groove shape had a depth dimension of 1.5 mm.

(実施例4)
外周面塗膜除去部材6の形状を変更した以外は実施例1と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例1と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。外周面塗膜除去部材6の形状としては、図2(d)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードで、幅寸法1.5mm、奥行き寸法8mm、高さ寸法20mmのゴムブレードを2つ重ね合わせたものであった。
Example 4
Except that the shape of the outer peripheral surface coating film removing member 6 was changed, the coating film was formed by the dip coating method and the coating film was removed in the same manner as in Example 1, and evaluation was performed in the same manner as in Example 1. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a shape shown in FIG. 2 (d), and a rubber blade having a width dimension of 1.5 mm, a depth dimension of 8 mm, and a height dimension of 20 mm. It was a superposition.

(実施例5)
外周面塗膜除去部材6の溝の形状を変更した以外は実施例1と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例1と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。外周面塗膜除去部材6の形状としては、図2(a)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法3mm、奥行き寸法8mm、高さ寸法20mmで、溝形状の寸法は、幅寸法1.0mm、奥行き寸法1.5mmであった。
(Example 5)
The coating film was formed and the coating film was removed by the dip coating method in the same manner as in Example 1 except that the shape of the groove of the outer peripheral surface coating film removing member 6 was changed, and evaluation was performed in the same manner as in Example 1. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a shape shown in FIG. The overall dimensions of the rubber blade were a width dimension of 3 mm, a depth dimension of 8 mm, and a height dimension of 20 mm, and the groove-shaped dimensions were a width dimension of 1.0 mm and a depth dimension of 1.5 mm.

(実施例6)
外周面塗膜除去部材6の溝の形状を変更した以外は実施例1と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例1と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。外周面塗膜除去部材6の形状としては、図2(a)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法3mm、奥行き寸法8mm、高さ寸法20mmで、溝形状の寸法は、幅寸法2.0mm、奥行き寸法2.5mmであった。なお、塗膜の除去の際に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間にしみ上がっていたが、しみ上がってくる高さは変動しやすく、しみ上がる量が安定しなかった。
(Example 6)
The coating film was formed and the coating film was removed by the dip coating method in the same manner as in Example 1 except that the shape of the groove of the outer peripheral surface coating film removing member 6 was changed, and evaluation was performed in the same manner as in Example 1. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a shape shown in FIG. The overall dimensions of the rubber blade were a width dimension of 3 mm, a depth dimension of 8 mm, and a height dimension of 20 mm, and the groove-shaped dimensions were a width dimension of 2.0 mm and a depth dimension of 2.5 mm. In the removal of the coating film, the solvent 11 oozes up into the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the base body 2, but the height of the oozing up easily varies. The amount of soaking was not stable.

(実施例7)
外周面塗膜除去部材6の形状を変更した以外は実施例2と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例2と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。外周面塗膜除去部材6の形状としては、図2(a)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法3mm、奥行き寸法8mm、高さ寸法20mmで、溝形状の寸法は、幅寸法2.0mm、奥行き寸法2.5mmであった。なお、塗膜の除去の際に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間にしみ上がっていたが、しみ上がってくる高さは変動しやすく、しみ上がる量が安定しなかった。
(Example 7)
Except that the shape of the outer peripheral surface coating film removing member 6 was changed, the coating film was formed and the coating film was removed by the dip coating method in the same manner as in Example 2, and evaluation was performed in the same manner as in Example 2. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a shape shown in FIG. The overall dimensions of the rubber blade were a width dimension of 3 mm, a depth dimension of 8 mm, and a height dimension of 20 mm, and the groove-shaped dimensions were a width dimension of 2.0 mm and a depth dimension of 2.5 mm. In the removal of the coating film, the solvent 11 oozes up into the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the base body 2, but the height of the oozing up easily varies. The amount of soaking was not stable.

(実施例8)
外周面塗膜除去部材6の形状と外周面塗膜除去部材6と基体2との当接位置関係を変更した以外は実施例1と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例1と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。外周面塗膜除去部材6の形状としては、図2(g)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法4.5mm、奥行き寸法8mm、高さ寸法20mmで、二つの溝形状の寸法は、どちらも幅寸法0.5mm、奥行き寸法1.5mmであった。また、外周面塗膜除去部材6と基体2との当接位置関係は、図5(a)に示すように、溝形状を有する面が基体2と当接し、二つの溝形状が2と空間を形成するように当接した。なお、塗膜の除去の際に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。
(Example 8)
Except for changing the shape of the outer peripheral surface coating film removing member 6 and the contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2, the coating film was formed by the dip coating method and the coating film was formed in the same manner as in Example 1. Removal was performed and evaluation was performed in the same manner as in Example 1. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having the shape shown in FIG. 2 (g) was used. The overall dimensions of the rubber blade were a width dimension of 4.5 mm, a depth dimension of 8 mm, and a height dimension of 20 mm, and the dimensions of the two groove shapes were both a width dimension of 0.5 mm and a depth dimension of 1.5 mm. Further, as shown in FIG. 5A, the contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2 is such that the surface having the groove shape contacts the substrate 2 and the two groove shapes are 2 and the space. Abutted to form. At the time of removing the coating film, the solvent 11 oozes up the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2 and rubs with the outer peripheral surface coating film removing member 6 to rub the coating film. Whenever was removed, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2.

(実施例9)
外周面塗膜除去部材6と基体2との当接位置関係を変更した以外は実施例8と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例8と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。外周面塗膜除去部材6と基体2との当接位置関係は、図5(b)に示すようにした。すなわち、外周面塗膜除去部材6の回転方向下流側の溝形状は、溝形状と基体2とで空間を形成するように当接した。もう一方の外周面塗膜除去部材6の回転方向上流側の溝形状は、回転方向上流側の側面に開口ができるように当接した。
なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の回転方向下流側の溝形状と基体2とで形成された空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。外周面塗膜除去部材6の回転方向上流側のもう一方の溝形状と基体2とで形成された空間では、溝形状の高さ寸法の半分の高さまで溶剤11のしみ上がりが確認できた。
Example 9
Except that the contact position relationship between the outer peripheral surface coating film removing member 6 and the base 2 was changed, the coating film was formed and the coating film was removed by the dip coating method in the same manner as in Example 8. Evaluation was performed. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable. The contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2 is as shown in FIG. That is, the groove shape on the downstream side in the rotation direction of the outer peripheral surface coating film removing member 6 was in contact with the groove shape and the base 2 so as to form a space. The groove shape on the upstream side in the rotational direction of the other outer peripheral surface coating film removing member 6 was in contact with the side surface on the upstream side in the rotational direction so that an opening was formed.
In removing the coating film, the solvent 11 oozes up the space formed by the groove shape on the downstream side in the rotation direction of the outer peripheral surface coating film removing member 6 and the substrate 2 and is rubbed with the outer peripheral surface coating film removing member 6. Whenever the coating film was removed, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. In the space formed by the other groove shape on the upstream side in the rotation direction of the outer peripheral surface coating film removing member 6 and the base body 2, it was confirmed that the solvent 11 spilled up to half the height of the groove shape.

(実施例10)
外周面塗膜除去部材6の形状と外周面塗膜除去部材6と基体2との当接位置関係を変更した以外は実施例2と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例2と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。外周面塗膜除去部材6の形状としては、図2(g)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法4.5mm、奥行き寸法8mm、高さ寸法20mmで、二つの溝形状の寸法は、どちらも幅寸法0.5mm、奥行き寸法1.5mmであった。外周面塗膜除去部材6と基体2との当接位置関係は、図5(b)に示すようにした。すなわち、外周面塗膜除去部材6の回転方向下流側の溝形状は、溝形状と基体2とで空間を形成するように当接した。もう一方の外周面塗膜除去部材6の回転方向上流側の溝形状は、回転方向上流側の側面に開口ができるように当接した。
(Example 10)
Except for changing the shape of the outer peripheral surface coating film removing member 6 and the contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2, the coating film was formed by the dip coating method and the coating film was formed in the same manner as in Example 2. Removal was performed and evaluation was performed in the same manner as in Example 2. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having the shape shown in FIG. 2 (g) was used. The overall dimensions of the rubber blade were a width dimension of 4.5 mm, a depth dimension of 8 mm, and a height dimension of 20 mm, and the dimensions of the two groove shapes were both a width dimension of 0.5 mm and a depth dimension of 1.5 mm. The contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2 is as shown in FIG. That is, the groove shape on the downstream side in the rotation direction of the outer peripheral surface coating film removing member 6 was in contact with the groove shape and the base 2 so as to form a space. The groove shape on the upstream side in the rotational direction of the other outer peripheral surface coating film removing member 6 was in contact with the side surface on the upstream side in the rotational direction so that an opening was formed.

なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の回転方向下流側の溝形状と基体2とで形成された空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。外周面塗膜除去部材6の回転方向上流側のもう一方の溝形状と基体2とで形成された空間では、半分の高さまで溶剤11のしみ上がりが確認できた。   In removing the coating film, the solvent 11 oozes up the space formed by the groove shape on the downstream side in the rotation direction of the outer peripheral surface coating film removing member 6 and the substrate 2 and is rubbed with the outer peripheral surface coating film removing member 6. Whenever the coating film was removed, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. In the space formed by the other groove shape on the upstream side in the rotation direction of the outer peripheral surface coating film removing member 6 and the base body 2, the soaking up of the solvent 11 was confirmed up to a half height.

(実施例11)
外周面塗膜除去部材6の形状と外周面塗膜除去部材6と基体2との当接位置関係を変更した以外は実施例1と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例1と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。なお、基体2の内周面の塗膜の拭き残しは確認できず、非常に良好であった。外周面塗膜除去部材6の形状としては、図2(h)に示す形状のエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法4.5mm、奥行き寸法8mm、高さ寸法20mmで、二つの溝形状の寸法は、どちらも幅寸法0.5mm、奥行き寸法1.5mmであった。また、一方の溝形状の側面は、上端5mmの位置から下端の奥行き寸法1.3mmの位置まで斜めに切り取られた形のものであった。また、外周面塗膜除去部材6と基体2との当接位置関係は、図5(a)に示すように、溝形状を有する面が基体2と当接し、上面から見た場合、二つの溝形状とも基体2とで空間を形成するように当接した。このとき、外周面塗膜除去部材6の回転方向上流側の溝形状は、回転方向上流側の側面に開口ができるように基体2に当接されている。
(Example 11)
Except for changing the shape of the outer peripheral surface coating film removing member 6 and the contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2, the coating film was formed by the dip coating method and the coating film was formed in the same manner as in Example 1. Removal was performed and evaluation was performed in the same manner as in Example 1. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. In addition, the wiping residue of the coating film of the internal peripheral surface of the base | substrate 2 was not able to be confirmed but was very favorable. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a shape shown in FIG. 2 (h) was used. The overall dimensions of the rubber blade were a width dimension of 4.5 mm, a depth dimension of 8 mm, and a height dimension of 20 mm, and the dimensions of the two groove shapes were both a width dimension of 0.5 mm and a depth dimension of 1.5 mm. Also, one side surface of the groove shape was cut obliquely from the position of 5 mm at the upper end to the position of the depth dimension of 1.3 mm at the lower end. Further, as shown in FIG. 5A, the contact position relationship between the outer peripheral surface coating film removing member 6 and the base 2 is such that the surface having the groove shape is in contact with the base 2 and viewed from the top. The groove shape was in contact with the base 2 so as to form a space. At this time, the groove shape on the upstream side in the rotation direction of the outer peripheral surface coating film removing member 6 is in contact with the base 2 so that an opening is formed on the side surface on the upstream side in the rotation direction.

なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の回転方向下流側の溝形状と基体2とで形成された空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。外周面塗膜除去部材6の回転方向上流側のもう一方の溝形状と基体2とで形成された空間では、溝形状の高さ寸法の半分の高さまで溶剤11のしみ上がりが確認できた。   In removing the coating film, the solvent 11 oozes up the space formed by the groove shape on the downstream side in the rotation direction of the outer peripheral surface coating film removing member 6 and the substrate 2 and is rubbed with the outer peripheral surface coating film removing member 6. Whenever the coating film was removed, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. In the space formed by the other groove shape on the upstream side in the rotation direction of the outer peripheral surface coating film removing member 6 and the base body 2, it was confirmed that the solvent 11 spilled up to half the height of the groove shape.

(比較例1)
外周面塗膜除去部材6の形状を変更した以外は実施例2と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例2と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。外周面塗膜除去部材6の形状としては、溝形状を有さない当接面が基体2に合わせた曲率をもったエチレンプロピレンジエンゴム製のゴムブレードを使用した。ゴムブレード全体の寸法は、幅寸法3mm、奥行き寸法8mm、高さ寸法20mmであった。
(Comparative Example 1)
Except that the shape of the outer peripheral surface coating film removing member 6 was changed, the coating film was formed and the coating film was removed by the dip coating method in the same manner as in Example 2, and evaluation was performed in the same manner as in Example 2. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. As the shape of the outer peripheral surface coating film removing member 6, a rubber blade made of ethylene propylene diene rubber having a contact surface not having a groove shape and a curvature matching the base 2 was used. The overall dimensions of the rubber blade were a width dimension of 3 mm, a depth dimension of 8 mm, and a height dimension of 20 mm.

(比較例2)
外周面塗膜除去部材6と基体2との当接位置関係を変更した以外は実施例2と同様にして浸漬塗布法による塗膜の形成と塗膜の除去を行い、実施例2と同様に評価を行った。基体2の外周面の塗膜の除去度合いの目視による確認結果を表1に示す。外周面塗膜除去部材6と基体2との当接位置関係は、図4(b)に示すようにした。すなわち、ゴムブレードのエッジ部分のみが当たるように当接した。溝形状の部分に、溶剤11のしみ上がりは確認できなかった。
(Comparative Example 2)
Except that the contact position relationship between the outer peripheral surface coating film removing member 6 and the substrate 2 was changed, the coating film was formed and the coating film was removed by the dip coating method in the same manner as in Example 2. Evaluation was performed. Table 1 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2. The contact position relationship between the outer peripheral surface coating film removing member 6 and the base 2 is as shown in FIG. That is, it contact | abutted so that only the edge part of a rubber blade might contact. No soaking up of the solvent 11 could be confirmed in the groove-shaped part.

Figure 2017185458
Figure 2017185458

(実施例12)
(第一中間層用塗布液の調整)
酸素欠損型酸化スズが被覆されている酸化チタン粒子(粉体抵抗率:120Ω・cm、酸化スズの被覆率:40%)50部、フェノール樹脂(プライオーフェンJ−325、DIC(株)(旧:大日本インキ化学工業(株))製、樹脂固形分:60質量%)40部、溶剤(分散媒)としてのメトキシプロパノール50部を、直径1mmのガラスビーズを用いたサンドミルに入れ、3時間分散処理することによって、第一中間層用塗布液を調製した。
Example 12
(Adjustment of coating solution for the first intermediate layer)
Titanium oxide particles coated with oxygen-deficient tin oxide (powder resistivity: 120 Ω · cm, tin oxide coverage: 40%), 50 parts, phenol resin (Pryofen J-325, DIC Corporation) : Manufactured by Dainippon Ink & Chemicals, Inc., resin solid content: 60% by mass), and 50 parts of methoxypropanol as a solvent (dispersion medium) are placed in a sand mill using glass beads having a diameter of 1 mm for 3 hours. By carrying out a dispersion treatment, a coating solution for the first intermediate layer was prepared.

この第一中間層用塗布液を上記アルミニウム製の円筒状の基体2上に浸漬塗布して、塗膜を形成した。なお、塗膜の膜厚は、塗膜を30分間150℃で乾燥・熱硬化させた場合に得られる層の中央部の膜厚が20μmとなるようにした。その後、基体2の下方の外周面の塗膜除去を行った。
塗膜除去方法として、メトキシプロパノールを溶剤11として用い、除去時間を30秒と60秒で実施した以外は実施例9と同様に行い、評価を行った。なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の溝形状と基体2で形成される空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。基体2の外周面の塗膜の除去度合いの目視による確認結果を表2に示す。
The coating solution for the first intermediate layer was dip-coated on the aluminum cylindrical substrate 2 to form a coating film. In addition, the film thickness of the coating film was set so that the film thickness at the center of the layer obtained when the coating film was dried and thermally cured at 150 ° C. for 30 minutes was 20 μm. Then, the coating film removal of the lower outer peripheral surface of the base | substrate 2 was performed.
Evaluation was performed in the same manner as in Example 9, except that methoxypropanol was used as the solvent 11 and the removal time was 30 seconds and 60 seconds. In removing the coating film, the solvent 11 oozes the groove formed on the outer peripheral surface coating film removing member 6 and the space formed by the substrate 2 and rubs with the outer peripheral surface coating film removing member 6 to remove the coating film. In any case, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. Table 2 shows the results of visual confirmation of the degree of removal of the coating film on the outer peripheral surface of the substrate 2.

(実施例13)
第一中間層用塗布液を上記アルミニウム製の円筒状の基体2上に浸漬塗布し、塗膜を形成した。その後、外周面の塗膜除去を実施せず、内周面の塗膜除去のみを行った。内周面のみの塗膜除去は、メトキシプロパノールを浸したシルボン紙を用いて、手で内周面を拭くことにより行った。内周面の塗膜除去後、30分間150℃で乾燥・熱硬化し、中央部の膜厚が20μmの第一中間層を形成した。
(Example 13)
The coating solution for the first intermediate layer was dip-coated on the aluminum cylindrical substrate 2 to form a coating film. Then, the coating film removal of the outer peripheral surface was not implemented, but only the coating film removal of the inner peripheral surface was performed. The removal of the coating film only on the inner peripheral surface was performed by wiping the inner peripheral surface by hand with a sylbon paper soaked with methoxypropanol. After removing the coating film on the inner peripheral surface, it was dried and heat-cured at 150 ° C. for 30 minutes to form a first intermediate layer having a thickness of 20 μm at the center.

次に第二中間層用塗布液1を、第一中間層上に浸漬塗布して、塗膜を形成した。なお、塗膜の膜厚は、塗膜を40分間160℃で加熱し、硬化(重合)させた場合に得られる層の中央部の膜厚が0.5μmとなるようにした。その後、基体2の下方の外周面の塗膜除去を行った。
塗膜除去方法は、除去時間を30秒と60秒で実施した以外は実施例9と同様に行い、同様に評価を行った。なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の溝形状と基体2で形成される空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。基体2の外周面の第二中間層用塗布液1の除去度合いの目視による確認結果を表2に示す。
Next, the coating solution 1 for 2nd intermediate | middle layers was dip-coated on the 1st intermediate | middle layer, and the coating film was formed. In addition, the film thickness of the coating film was set so that the film thickness of the center part of the layer obtained when the coating film was heated at 160 ° C. for 40 minutes and cured (polymerized) was 0.5 μm. Then, the coating film removal of the lower outer peripheral surface of the base | substrate 2 was performed.
The coating film removal method was performed in the same manner as in Example 9 except that the removal time was 30 seconds and 60 seconds, and evaluation was performed in the same manner. In removing the coating film, the solvent 11 oozes the groove formed on the outer peripheral surface coating film removing member 6 and the space formed by the substrate 2 and rubs with the outer peripheral surface coating film removing member 6 to remove the coating film. In any case, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. Table 2 shows the results of visual confirmation of the degree of removal of the coating solution 1 for the second intermediate layer on the outer peripheral surface of the substrate 2.

(実施例14)
第一中間層用塗布液を上記アルミニウム製の円筒状の基体2上に浸漬塗布し、塗膜を形成した。その後、外周面の塗膜除去を実施せず、実施例13と同様の方法で内周面の塗膜除去のみを行った。30分間150℃で乾燥・熱硬化し、中央部の膜厚が20μmの第一中間層を形成した。
(Example 14)
The coating solution for the first intermediate layer was dip-coated on the aluminum cylindrical substrate 2 to form a coating film. Thereafter, the coating film on the outer circumferential surface was not removed, and only the coating film on the inner circumferential surface was removed in the same manner as in Example 13. Drying and thermosetting were performed at 150 ° C. for 30 minutes to form a first intermediate layer having a thickness of 20 μm at the center.

次に第二中間層用塗布液1を、第一中間層上に浸漬塗布し、塗膜を形成した。その後、外周面の塗膜除去を実施せず、第一中間層の形成時と同様の方法で内周面の塗膜除去のみを行った。40分間160℃で加熱し、硬化(重合)させ、中央部の膜厚が0.5μmの第二中間層を形成した。   Next, the coating solution 1 for 2nd intermediate | middle layers was dip-coated on the 1st intermediate | middle layer, and the coating film was formed. Thereafter, the coating film on the outer peripheral surface was not removed, and only the coating film on the inner peripheral surface was removed in the same manner as in the formation of the first intermediate layer. It was heated at 160 ° C. for 40 minutes and cured (polymerized) to form a second intermediate layer having a thickness of 0.5 μm at the center.

(電荷発生層用塗布液の調整)
次に、CuKα特性X線回折におけるブラッグ角(2θ±0.2°)の7.5°、9.9°、12.5°、16.3°、18.6°、25.1°および28.3°にピークを有する結晶形のヒドロキシガリウムフタロシアニン結晶(電荷発生物質)を用意した。このヒドロキシガリウムフタロシアニン結晶10部、ポリビニルブチラール樹脂(商品名:エスレックBX−1、積水化学工業(株)製)5部およびシクロヘキサノン250部を、直径1mmのガラスビーズを用いたサンドミルに入れ、1.5時間分散処理した。次に、これに酢酸エチル250部を加えることによって、電荷発生層用塗布液を調製した。
(Adjustment of coating solution for charge generation layer)
Next, Bragg angles (2θ ± 0.2 °) in CuKα characteristic X-ray diffraction of 7.5 °, 9.9 °, 12.5 °, 16.3 °, 18.6 °, 25.1 ° and A crystalline hydroxygallium phthalocyanine crystal (charge generation material) having a peak at 28.3 ° was prepared. 10 parts of this hydroxygallium phthalocyanine crystal, 5 parts of polyvinyl butyral resin (trade name: ESREC BX-1, manufactured by Sekisui Chemical Co., Ltd.) and 250 parts of cyclohexanone are placed in a sand mill using glass beads having a diameter of 1 mm. Dispersed for 5 hours. Next, 250 parts of ethyl acetate was added thereto to prepare a charge generation layer coating solution.

この電荷発生層用塗布液を、上記第二中間層上に浸漬塗布して、塗膜を形成した。なお、塗膜の膜厚は、塗膜を95℃で10分間乾燥させた場合に得られる層の中央部の膜厚が0.18μmとなるようにした。その後、基体2の下方の外周面の塗膜除去を行った。
塗膜除去方法は、除去時間を30秒と60秒で実施した以外は実施例9と同様に行い、同様に評価を行った。なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の溝形状と基体2で形成される空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。基体2の外周面の電荷発生層用塗布液の除去度合いの目視による確認結果を表2に示す。
This coating solution for charge generation layer was dip coated on the second intermediate layer to form a coating film. In addition, the film thickness of the coating film was such that the film thickness at the center of the layer obtained when the coating film was dried at 95 ° C. for 10 minutes was 0.18 μm. Then, the coating film removal of the lower outer peripheral surface of the base | substrate 2 was performed.
The coating film removal method was performed in the same manner as in Example 9 except that the removal time was 30 seconds and 60 seconds, and evaluation was performed in the same manner. In removing the coating film, the solvent 11 oozes the groove formed on the outer peripheral surface coating film removing member 6 and the space formed by the substrate 2 and rubs with the outer peripheral surface coating film removing member 6 to remove the coating film. In any case, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. Table 2 shows the results of visual confirmation of the degree of removal of the charge generation layer coating solution on the outer peripheral surface of the substrate 2.

(実施例15)
第一中間層用塗布液を上記アルミニウム製の円筒状の基体2上に浸漬塗布し、塗膜を形成した。その後、外周面の塗膜除去を実施せず、実施例13と同様の方法で内周面の塗膜除去のみを行った。30分間150℃で乾燥・熱硬化し、中央部の膜厚が20μmの第一中間層を形成した。
(Example 15)
The coating solution for the first intermediate layer was dip-coated on the aluminum cylindrical substrate 2 to form a coating film. Thereafter, the coating film on the outer circumferential surface was not removed, and only the coating film on the inner circumferential surface was removed in the same manner as in Example 13. Drying and thermosetting were performed at 150 ° C. for 30 minutes to form a first intermediate layer having a thickness of 20 μm at the center.

次に第二中間層用塗布液1を、第一中間層上に浸漬塗布し、塗膜を形成した。その後、外周面の塗膜除去を実施せず、第一中間層の形成時と同様の方法で内周面の塗膜除去のみを行った。40分間160℃で加熱し、硬化(重合)させ、中央部の膜厚が0.5μmの第二中間層を形成した。   Next, the coating solution 1 for 2nd intermediate | middle layers was dip-coated on the 1st intermediate | middle layer, and the coating film was formed. Thereafter, the coating film on the outer peripheral surface was not removed, and only the coating film on the inner peripheral surface was removed in the same manner as in the formation of the first intermediate layer. It was heated at 160 ° C. for 40 minutes and cured (polymerized) to form a second intermediate layer having a thickness of 0.5 μm at the center.

次に電荷発生層用塗布液を、第二中間層上に浸漬塗布し、塗膜を形成した。その後、外周面の塗膜除去を実施せず、第一中間層の形成時と同様の方法で内周面の塗膜除去のみを行った。95℃で10分間乾燥させ、中央部の膜厚が0.18μmの電荷発生層を形成した。   Next, the charge generation layer coating solution was dip coated on the second intermediate layer to form a coating film. Thereafter, the coating film on the outer peripheral surface was not removed, and only the coating film on the inner peripheral surface was removed in the same manner as in the formation of the first intermediate layer. The film was dried at 95 ° C. for 10 minutes to form a charge generation layer having a central thickness of 0.18 μm.

(電荷輸送層用塗布液の調整)
次に、下記式(CTM−1)で示される化合物5部、下記式(CTM−2)で示される化合物5部、下記式(B1−1)で示される構造単位を有するポリカーボネート樹脂10部を、モノクロロベンゼン50部に溶解させ、電荷輸送層用塗布液を調製した。
(Adjustment of coating solution for charge transport layer)
Next, 5 parts of a compound represented by the following formula (CTM-1), 5 parts of a compound represented by the following formula (CTM-2), 10 parts of a polycarbonate resin having a structural unit represented by the following formula (B1-1) Then, it was dissolved in 50 parts of monochlorobenzene to prepare a coating solution for charge transport layer.

この電荷輸送層用塗布液を、上記電荷発生層上に浸漬塗布して、塗膜を形成した。なお、塗膜の膜厚は、塗膜を120℃で30分間乾燥させた場合に得られる層の中央部の膜厚が15μmとなるようにした。その後、基体2の下方の外周面の塗膜除去を行った。

Figure 2017185458
Figure 2017185458
塗膜除去方法は、溶剤11としてモノクロロベンゼンを用い、除去時間を30秒と60秒で実施した以外は実施例9と同様に行い、同様に評価を行った。なお、塗膜の除去において、溶剤11は外周面塗膜除去部材6の溝形状と基体2で形成される空間をしみ上がり、外周面塗膜除去部材6で摺擦して塗膜を除去している際は常に、溶剤11は外周面塗膜除去部材6の溝形状と基体2とで形成された空間の上端まで溜まっていた。基体2の外周面の電荷発生層、電荷輸送層用塗布液の塗膜の除去度合いの目視による確認結果を表2に示す。 This charge transport layer coating solution was dip coated on the charge generation layer to form a coating film. In addition, the film thickness of the coating film was set so that the film thickness at the center of the layer obtained when the coating film was dried at 120 ° C. for 30 minutes was 15 μm. Then, the coating film removal of the lower outer peripheral surface of the base | substrate 2 was performed.
Figure 2017185458
Figure 2017185458
The coating film removal method was performed in the same manner as in Example 9 except that monochlorobenzene was used as the solvent 11 and the removal time was 30 seconds and 60 seconds. In removing the coating film, the solvent 11 oozes the groove formed on the outer peripheral surface coating film removing member 6 and the space formed by the substrate 2 and rubs with the outer peripheral surface coating film removing member 6 to remove the coating film. In any case, the solvent 11 was accumulated up to the upper end of the space formed by the groove shape of the outer peripheral surface coating film removing member 6 and the substrate 2. Table 2 shows the results of visual confirmation of the degree of removal of the coating film of the charge generation layer and charge transport layer coating solution on the outer peripheral surface of the substrate 2.

Figure 2017185458
Figure 2017185458

1:基体保持部材
2:基体
3:溶剤供給口
4:溶剤供給流路
5:内周面塗膜除去部材
6:外周面塗膜除去部材
7:外周面塗膜除去部材用保持部材
8:支持体
9:溶剤回収タンク
10:溶剤供給タンク
11:溶剤
12:溶剤供給ポンプ
13:回転モーター
15:軸部
16:溶剤貯留部
1: Substrate holding member 2: Substrate 3: Solvent supply port 4: Solvent supply channel 5: Inner peripheral surface coating film removing member 6: Outer peripheral surface coating film removing member 7: Outer peripheral surface coating film removing member holding member 8: Support Body 9: Solvent recovery tank 10: Solvent supply tank 11: Solvent 12: Solvent supply pump 13: Rotary motor 15: Shaft 16: Solvent reservoir

Claims (7)

電子写真感光体用塗布液の塗膜が形成された円筒状の基体を鉛直方向に支持し、該基体の外周面の長手方向下方にある被除去部の塗膜を、少なくとも上端部が開放された溝形状を有する外周面塗膜除去部材を用いて除去する塗膜除去方法であって、
該方法が、
該基体の外周面の該被除去部に該外周面塗膜除去部材の該溝形状を有する面を対向させ、該溝形状と該基体とで空間を形成するように当接する工程、
溶剤が、該空間の下端よりしみ上がることで、該空間に該溶剤を供給する工程、および
該基体と該外周面塗膜除去部材とを相対的に回転させて摺擦し、該被除去部の塗膜を除去する工程、
を有することを特徴とする円筒状の基体の塗膜除去方法。
A cylindrical substrate on which a coating film of a coating solution for an electrophotographic photosensitive member is formed is supported in the vertical direction, and at least the upper end portion of the coating film on the portion to be removed located in the longitudinal direction of the outer peripheral surface of the substrate is opened. A method of removing a coating film using an outer peripheral surface coating film removing member having a groove shape,
The method is
A step of contacting the surface having the groove shape of the outer peripheral surface coating film removing member opposite to the portion to be removed of the outer peripheral surface of the base, and abutting so as to form a space between the groove shape and the base;
The solvent oozes from the lower end of the space, the step of supplying the solvent to the space, and the base and the outer peripheral surface coating film removing member are relatively rubbed and rubbed, and the portion to be removed Removing the coating film of
A method for removing a coating film from a cylindrical substrate, comprising:
前記溶剤が、前記基体の内部かつ前記基体と前記外周面塗膜除去部材とが当接する部位の下端よりも上方に位置する溶剤供給口より吐出されることを特徴とする、請求項1に記載の塗膜除去方法。   The said solvent is discharged from the solvent supply port located above the lower end of the site | part which the said base | substrate and the said outer peripheral surface coating-film removal member contact | abut inside the said base | substrate. Coating film removal method. 前記基体の内周面の長手方向下方にある被除去部の塗膜を除去するための、内周面塗膜除去部材をさらに有することを特徴とする、請求項2に記載の塗膜除去方法。   The coating film removing method according to claim 2, further comprising an inner circumferential surface coating film removing member for removing a coating film of a portion to be removed located in the longitudinal direction below the inner circumferential surface of the base body. . 前記内周面塗膜除去部材が、前記基体と前記外周面塗膜除去部材との当接部と前記溶剤供給口とを結ぶ直線上を避ける位置に配置されることを特徴とする、請求項3に記載の塗膜除去方法。   The inner peripheral surface coating film removing member is disposed at a position avoiding a straight line connecting a contact portion between the base body and the outer peripheral surface coating film removing member and the solvent supply port. 4. The method for removing a coating film according to 3. 円筒状の基体に浸漬塗布法により電子写真感光体用塗布液の塗膜を形成する電子写真感光体の製造方法において、
浸漬塗布法により該基体に電子写真感光体用塗布液の塗膜を形成後、請求項1〜4のいずれか1項に記載の塗膜除去方法により該基体の長手方向下方にある塗膜を除去する工程を有する電子写真感光体の製造方法。
In the method for producing an electrophotographic photosensitive member, which forms a coating film of a coating solution for an electrophotographic photosensitive member on a cylindrical substrate by dip coating,
After forming the coating film of the electrophotographic photoreceptor coating solution on the substrate by a dip coating method, the coating film on the lower side in the longitudinal direction of the substrate is formed by the coating film removing method according to any one of claims 1 to 4. A method for producing an electrophotographic photosensitive member having a removing step.
前記電子写真感光体用塗布液が下引き層用塗布液である請求項5に記載の電子写真感光体の製造方法。   The method for producing an electrophotographic photosensitive member according to claim 5, wherein the coating solution for an electrophotographic photosensitive member is a coating solution for an undercoat layer. 前記下引き層用塗布液が、重合性官能基を有する電子輸送物質、架橋剤、および熱可塑性樹脂を含有する請求項6に記載の電子写真感光体の製造方法。   The method for producing an electrophotographic photosensitive member according to claim 6, wherein the undercoat layer coating solution contains an electron transport material having a polymerizable functional group, a crosslinking agent, and a thermoplastic resin.
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