JPH02101488A - Cleaning method for electrophotographic photosensitive body - Google Patents
Cleaning method for electrophotographic photosensitive bodyInfo
- Publication number
- JPH02101488A JPH02101488A JP25386188A JP25386188A JPH02101488A JP H02101488 A JPH02101488 A JP H02101488A JP 25386188 A JP25386188 A JP 25386188A JP 25386188 A JP25386188 A JP 25386188A JP H02101488 A JPH02101488 A JP H02101488A
- Authority
- JP
- Japan
- Prior art keywords
- cleaning
- blade
- photoreceptor
- average
- photosensitive body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 14
- 230000003746 surface roughness Effects 0.000 claims abstract description 11
- 108091008695 photoreceptors Proteins 0.000 claims description 44
- 239000000314 lubricant Substances 0.000 claims description 18
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229920000058 polyacrylate Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000003618 dip coating Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical group FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 description 1
- SBYMUDUGTIKLCR-UHFFFAOYSA-N 2-chloroethenylbenzene Chemical compound ClC=CC1=CC=CC=C1 SBYMUDUGTIKLCR-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- -1 perfluoroalkyl acrylate Chemical compound 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
- G03G21/0011—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a blade; Details of cleaning blades, e.g. blade shape, layer forming
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cleaning In Electrography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電子写真感光体表面のクリーニング方法、即
ち、滑材を介し、ブレードによりクリーニングする電子
写真感光体のクリーニング方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for cleaning the surface of an electrophotographic photoreceptor, that is, a method for cleaning an electrophotographic photoreceptor using a blade through a lubricant.
従来の技術
ブレードによる電子写真感光体のクリーニングにおいて
は、ブレードとしてゴム硬度７０〜８０’のウレタン系
樹脂よりなるブレードが一般に用いられている。また、
ブレードの感光体側の面と、感光体の進行方向とのなす
角が鋭角になる取り付は方や、反対に鈍角になる取り付
は方がおり、それぞれブレードエツジを感光体面に押圧
する圧力が異なっている。前者の取り付は方では、１５
〜２０９／ ｃｍ、後者の取り付は方では、３５〜６０
ｇ／ｃｍにセットされる。In cleaning an electrophotographic photoreceptor using a conventional blade, a blade made of urethane resin with a rubber hardness of 70 to 80' is generally used. Also,
Some installations have an acute angle between the photoconductor-side surface of the blade and the direction of photoconductor travel, while others have an obtuse angle. It's different. For the former installation, 15
~209/cm, the latter installation is 35~60cm
g/cm.
いずれのブレードクリーニング方法でも、圧力が上記の
数値より小ざい場合には、感光体表面に残留する現像剤
がブレードをくぐり央け、クリーニング不良を発生し、
また、圧力が上記数値より大きい場合には、環像剤を感
光体表面に固着させて黒点をコピー画像に発生させたり
、ブレードに振動を起こしたり、ブレードがめくれあが
る等の不都合が生じることが知られている。Regardless of the blade cleaning method, if the pressure is lower than the above value, the developer remaining on the photoreceptor surface will pass through the blade and cause cleaning failure.
In addition, if the pressure is higher than the above value, problems such as the ring image agent sticking to the surface of the photoreceptor and black spots on the copied image, vibration of the blade, and curling of the blade may occur. Are known.
これ等の問題点を防止するため、従来より感光体表面を
粗面化する方法が取られてきた（例えば特開昭６０−２
６３９５６８号、同６１−２５１８５９号、同６２−１
５９１５１号公報）。In order to prevent these problems, conventional methods have been used to roughen the surface of the photoreceptor (for example, Japanese Patent Laid-Open No. 60-2
No. 639568, No. 61-251859, No. 62-1
59151).
発明が解決しようとする課題
上記の感光体表面を粗面化する方法は、平均粗ざＲａの
みを決めようとするもので、それによると必ずしも上記
の如き不都合を防止できないことが判明した。例えば、
平均粗さが０．３μｍ以下でおっても、ブレードと感光
体表面との間に粒径０．０３μｍ〜１０即程度のアクリ
ル系重合体、スチレン系重合体、スチレン−アクリル系
共重合体又はフッ素系共重合体の粉末を滑材として介在
させれば、ブレードの振動によるクリーニング不良など
の不都合は発生しないが、１０６ｍ以上の粗度でおって
も、凹凸平均間隔が３５０μｍ以下になると、クリーニ
ング不良が発生する。Problems to be Solved by the Invention The method for roughening the surface of a photoreceptor described above attempts to determine only the average roughness Ra, and it has been found that this method does not necessarily prevent the above-mentioned disadvantages. for example,
Even if the average roughness is 0.3 μm or less, an acrylic polymer, styrene polymer, styrene-acrylic copolymer, or styrene-acrylic copolymer with a particle size of 0.03 μm to 10 μm is used between the blade and the photoreceptor surface. If fluorine-based copolymer powder is used as a lubricant, problems such as poor cleaning due to blade vibration will not occur. A defect occurs.
更に調査した結果、ブレードを用いた感光体表面のクリ
ーニングに不都合を生じることなしに実施するためには
、感光体表面の平均粗さのみを決めるだけでは不十分で
めり、平均粗さに加えて、凹凸周期、滑材等を考慮して
規定する必要が必ることか判明した。Further investigation revealed that in order to clean the photoreceptor surface using a blade without causing any inconvenience, it is insufficient to determine only the average roughness of the photoreceptor surface; Therefore, it was found that it is necessary to specify the irregularity period, lubricating material, etc.
また、近年、電子写真感光体の主流となりつつおる有機
感光体は、表面の平滑性が極めて良好になってきており
、それ等平滑性の良好な感光体でめっても、上記のよう
な不都合を生じないクリーニング方法が要求されている
。In addition, organic photoreceptors, which have become the mainstream of electrophotographic photoreceptors in recent years, have extremely smooth surfaces. There is a need for a cleaning method that does not cause any inconvenience.
本発明は、以上のような事情に鑑みてなされたものであ
って、その目的は、より平滑な感光体面を有する電子写
真感光体を良好にクリーニングすることができる方法を
提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method that can effectively clean an electrophotographic photoreceptor having a smoother photoreceptor surface.
課題を解決するための手段
本発明者は、有機感光体のクリーニングは、表面平均粗
さだＣプでなく、凹凸周期、即ち凹凸平均間隔を特定の
範囲に設定することにより、本発明の上記の目的が達成
されることを見出だし、本発明を完成するに至った。Means for Solving the Problems The present inventor has discovered that the cleaning of an organic photoreceptor can be achieved by setting the period of irregularities, that is, the average interval of irregularities within a specific range, rather than the average surface roughness. The inventors have found that the object can be achieved and have completed the present invention.
本発明は、滑材を介し、クリーニングブレードで感光層
を摺涼しクリーニングする電子写真感光体のクリーニン
グ方法において、該感光層の平均表面粗さＲａが下記式
（１）の範囲にあり、凹凸平均間隔Ｓｍが、下記式（２
）の範囲に必り、かつ、ＲａとＳｍが下記式（３）の関
係を満たすことを特徴とする。The present invention provides a method for cleaning an electrophotographic photoreceptor in which the photosensitive layer is cooled by sliding with a cleaning blade through a lubricant, in which the average surface roughness Ra of the photosensitive layer is within the range of the following formula (1), and the unevenness average The distance Sm is calculated using the following formula (2
), and Ra and Sm satisfy the relationship of formula (3) below.
０、０１ａｍ≦Ｒａ≦１．１ ｐ（１）１００ｐ＋≦Ｓ
ｍ ≦３０００＃Ｉ （２）１．５
ｘｌＯ−３ｓｍ ＋０．４５≧Ｒａ≧４ Ｘ１０−３
Ｓｍ −４Ｓｍ−０．６（３）第１図は、本発明を説明
するための説明図である。感光体１の表面にはドクター
ブレード２が当接され、滑材３を介して囲動することに
よって現像剤４のクリーニングが行われる。本発明にお
いて、感光体１の表面は、粗面１ａが形成されており、
そしてその粗面は、上記式（１） 、（２）及び（３）
の関係が満たされていることが必要である。第２図はそ
の関係を説明するためのグラフで、縦軸は感光層の平均
表面粗ざＲａを示し、横軸は凹凸平均間隔Ｓｍを示す。0, 01am≦Ra≦1.1 p(1)100p+≦S
m≦3000#I (2)1.5
xlO-3sm +0.45≧Ra≧4 X10-3
Sm-4Sm-0.6(3) FIG. 1 is an explanatory diagram for explaining the present invention. A doctor blade 2 is brought into contact with the surface of the photoreceptor 1, and cleaning of the developer 4 is performed by moving it around the surface of the photoreceptor 1 via a lubricant 3. In the present invention, the surface of the photoreceptor 1 is formed with a rough surface 1a,
The rough surface is expressed by the above formulas (1), (2) and (3).
It is necessary that the following relationships are satisfied. FIG. 2 is a graph for explaining this relationship, in which the vertical axis shows the average surface roughness Ra of the photosensitive layer, and the horizontal axis shows the average unevenness spacing Sm.
図中、斜線で囲まれた部分が、本発明の上記式（１）
、（２）及び（３）の関係を満足する範囲を示す。In the figure, the part surrounded by diagonal lines corresponds to the above formula (1) of the present invention.
, (2) and (3).
本発明において、ブレードと感光層との間に介在させる
滑材としては公知のものを使用することができるが、ア
クリル系重合体、スチレン系重合体、スチレン−アクリ
ル系系共重合体又はフッ素系共重合体よりなる粒径０．
０１μｍ〜２０１１！ｎの範囲の微粉末を使用するのが
好ましい。また、感光体表面に５〜１５朗の粒径を有す
る現像剤が残菌している場合には、それが滑材としての
役割を果たすことになる。In the present invention, known lubricants can be used as the lubricant interposed between the blade and the photosensitive layer, including acrylic polymers, styrene polymers, styrene-acrylic copolymers, and fluorine-based lubricants. The particle size of the copolymer is 0.
01μm～2011! Preferably, fine powders in the range n are used. In addition, if developer having a particle size of 5 to 15 mm remains on the surface of the photoreceptor, it will function as a lubricant.
アクリル系重合体、スチレン系重合体、スチレン−アク
リル系共重合体としては、スチレン、クロルスチレン等
のスチレン類、アクリル酸メチル、アクリル酸エチル、
アクリル酸ブチル、メタクリル酸メチル、メタクリル酸
エチル、メタクリル酸ブチル等の単独重合体又は共重合
体を使用することができ、フッ素系共重合体としてはテ
トラフルオロエチレン、トリフルオロエチレン、パーフ
ルオロアルキルアクリレート（又はメタクリレート）、
ポリフッ化ビニリデン等を使用することができる。Examples of acrylic polymers, styrene polymers, and styrene-acrylic copolymers include styrenes such as styrene and chlorostyrene, methyl acrylate, ethyl acrylate,
Homopolymers or copolymers of butyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, etc. can be used, and examples of fluorine-based copolymers include tetrafluoroethylene, trifluoroethylene, and perfluoroalkyl acrylate. (or methacrylate),
Polyvinylidene fluoride or the like can be used.
滑材は、感光体面が新しい場合、感光体面とブレード間
の摩擦力を下げるという重要な作用を示す。そのほかに
、滑材は、感光体面を摩擦して、粗面にする作用も行う
。そして、コピー操作を繰り返すにしたがって、ブレー
ドと感光体との摺動は円滑になり、クリーニングも良好
に行われるようになる。The lubricant plays an important role in reducing the friction between the photoreceptor surface and the blade when the photoreceptor surface is new. In addition, the lubricant also acts to rub the surface of the photoreceptor to make it rough. As the copying operation is repeated, the blade and the photoreceptor will slide more smoothly, and cleaning will be performed better.
また、本発明において使用されるブレードとしては、ゴ
ム硬度１０〜８０°の１クレタン系樹脂よりなるブレー
ドを使用するのが好ましく、その場合、１５〜６０９／
ｃｍの圧力で当接してクリーニング操作を行うのが特に
好ましい。In addition, as the blade used in the present invention, it is preferable to use a blade made of 1-cretan resin with a rubber hardness of 10 to 80 degrees, in which case it is 15 to 609/
It is particularly preferred to carry out the cleaning operation with abutment at a pressure of cm.
実施例 本発明を実施例によって説明する。Example The present invention will be explained by examples.
比較例１及び実施例１
直径８４．φのアルミニウムパイプ上に、下引層を形成
した。即ち、ポリアミド樹脂（商品名ニラツカマイト５
００３、大日本インキ化学社製）を用いた下記組成の溶
液を作製し、これを用いて浸漬塗布し、１１０℃で１０
分間乾燥して、膜厚４Ｓｍ−０．５５朗の下引層を形成
した。Comparative Example 1 and Example 1 Diameter 84. An undercoat layer was formed on a φ aluminum pipe. That is, polyamide resin (trade name Niratsukamite 5)
003, manufactured by Dainippon Ink Chemical Co., Ltd.) with the following composition, dip coating was performed using this solution, and the solution was coated at 110°C for 10 minutes.
It was dried for minutes to form a subbing layer with a film thickness of 4 Sm-0.55 mm.
ラッカマイト５００３ １重量部メタノー
ル ５重量部ｎ−ブタノール
３重量部水
１重量部形成された下引層の上に、下記組成の塗布液を
浸漬塗布法によって塗布し、１００℃で１０分間乾燥し
て、膜厚０．８韓の電荷発生層を形成した。Laccamite 5003 1 part by weight methanol 5 parts by weight n-butanol
3 parts by weight water
A coating solution having the following composition was applied by dip coating onto the undercoat layer formed in an amount of 1 part by weight, and dried at 100° C. for 10 minutes to form a charge generation layer having a thickness of 0.8 mm.
ポリビニルブチラール樹脂
（商品名： ＢＭ−１、積水化学社！り１重量部ジブロ
モアントアントロン
（商品名：ピグメントレッド
１６８ 、ＩＣＩ社製） ８重量部トリフ
ルオロ酢酸 ０．０２重量部シクロヘキ
サノン １９重量部形成された電荷発生
層の上に、下記組成の塗布液を浸漬塗布法によって塗布
し、１１０℃で１時間乾燥して、膜厚１８ｊＩｆｒｔの
電荷輸送層を形成した。Polyvinyl butyral resin (trade name: BM-1, Sekisui Chemical Co., Ltd.) 1 part by weight Dibromoanthanthrone (trade name: Pigment Red 168, manufactured by ICI) 8 parts by weight Trifluoroacetic acid 0.02 parts by weight Cyclohexanone 19 parts by weight A coating solution having the following composition was applied onto the charge generation layer by dip coating, and dried at 110° C. for 1 hour to form a charge transport layer having a thickness of 18jIfrt.
Ｎ、Ｎ ’−ジフェニルーＮ、Ｎ’−ビス−（３−メチ
ルフェニル）−［Ｌ１’
ビフェニル］−４，４’−ジアミン ５重信部ポリカ
ーボネート樹脂 ６重量部モノクロルベン
ゼン ４０重量部上記のように形成された
電子写真感光体の表面、即ち電荷輸送層の表面を表面粗
度計で測定したところ、Ｒａ＝約０．０１μｍで、凹凸
の周期ハ８００〜１５００朗であり、極めて平滑であっ
た。N,N'-diphenyl-N,N'-bis-(3-methylphenyl)-[L1'biphenyl]-4,4'-diamine 5 parts Polycarbonate resin 6 parts by weight Monochlorobenzene 40 parts by weight Formed as above When the surface of the electrophotographic photoreceptor, that is, the surface of the charge transport layer, was measured with a surface roughness meter, it was found to be extremely smooth with an Ra of about 0.01 μm and a period of irregularities of 800 to 1500 μm.
この電子写真感光体を、既存のブレードクリーニングシ
ステムと組み合わせたところ、ドクターブレード（感光
体面との取り付は角２０°、接触圧１７．５（Ｊ／ｃｍ
、ゴム硬度７０’のポリウレタン製）の場合には、ブレ
ードが感光体の摺動を妨害し、感光体の回動が阻害され
た。また、ワイパーブレー−ド（取り付は角１６０°、
接触圧３５ｇ／ｃｍ、ゴム硬度７０°のポリウレタン製
）の場合、感光体面とブレードエツジが接触、離脱を繰
り返し、激しい振動を生じた。この感光体を８００Ｖで
帯電し、５〜８エルグ／ｃｒＡの画像露光を行い、常法
の電子写真プロセスを経て得られたコピー画像には、ク
リーニング不良による汚れが生じた。When this electrophotographic photoreceptor was combined with an existing blade cleaning system, a doctor blade (attached to the photoreceptor surface at an angle of 20° and a contact pressure of 17.5 (J/cm)
, made of polyurethane with a rubber hardness of 70'), the blade obstructed the sliding movement of the photoreceptor, and rotation of the photoreceptor was inhibited. In addition, the wiper blade (installation angle 160°,
When the blade was made of polyurethane (with a contact pressure of 35 g/cm and a rubber hardness of 70°), the photoreceptor surface and the blade edge repeatedly came into contact with and separated from each other, resulting in severe vibration. This photoreceptor was charged at 800 V, imagewise exposed at 5 to 8 ergs/crA, and a copy image obtained through a conventional electrophotographic process was smudged due to poor cleaning.
上記と同じ電子写真感光体を上記ドクターブレードと組
み合わせる際に、ブレードと感光体面の間に０．０１〜
１．０韓ｍの範囲に粒径が分布しているＰＶＤＦ（ポリ
ビニリデンフルオライド）微粉末と、１．０〜１５μｍ
の範囲に粒径が分布しているアクリル樹脂微粉末との混
合物よりなる滑材を介在させると、摺動を妨害されるこ
とはなくなり、ワイパーブレードと組み合わせても、振
動やそれによるクリーニング不良は発生しなかった。When combining the same electrophotographic photoreceptor as above with the doctor blade, there is a gap between the blade and the photoreceptor surface of 0.01~
PVDF (polyvinylidene fluoride) fine powder whose particle size is distributed in the range of 1.0 μm and 1.0 to 15 μm
By interposing a lubricating material made of a mixture of acrylic resin fine powder with a particle size distribution in the range of It did not occur.
滑材として、上記のような２種類の粉末の混合物ではな
く、０．０１〜２０μｍの粒径範囲を持つＰＶ［）Ｆ或
いはスチレン系共重合体を用いた場合にも、上記と同様
にクリーニング不良は発生しなかった。Even if PV[)F or a styrene copolymer with a particle size range of 0.01 to 20 μm is used as the lubricant instead of a mixture of the two types of powders as described above, cleaning can be performed in the same manner as above. No defects occurred.
実施例２
実施例１と同様な構成の感光体において、電荷輸送層の
乾燥条件を１３０℃で６０分としたものでは、表面粗度
Ｒａ＝約０．０１１１１ｎで、凹凸周期が３００〜５０
０μｍとなった。これをドクターブレードと組み合わせ
たところ、振動を生じたが、０．１〜１５Ｎｉの粒径を
持つＰｖ叶機微粉末滑材として使用したところ、（辰動
は発生せず、良好なりリーニングを行うことができた。Example 2 In a photoreceptor having the same configuration as in Example 1, the drying condition of the charge transport layer was 130° C. for 60 minutes, the surface roughness Ra was approximately 0.01111n, and the period of concavities and convexities was 300 to 50.
It became 0 μm. When this was combined with a doctor blade, vibration occurred, but when used as a Pv powder lubricant with a particle size of 0.1 to 15Ni, (no oscillation occurred and good leaning was achieved. was completed.
比較例２
実施例２と同様な構成の感光体において、電荷輸送層の
乾燥条件を９５°Ｃで６０分としたものでは、Ｒａ＝約
０．０１μｍで、凹凸周期が２０００１Ｊｍとなった。Comparative Example 2 In a photoreceptor having the same structure as in Example 2, in which the charge transport layer was dried at 95° C. for 60 minutes, Ra was approximately 0.01 μm and the period of irregularities was 20001 Jm.
この場合、０．０１〜２０ｐｍの広範囲な粒度分布を持
つＰＶＤＦ微粉末等の滑材を用いても、ブレードの振動
を防止することができなかった。In this case, even if a lubricating material such as PVDF fine powder having a wide particle size distribution of 0.01 to 20 pm was used, vibration of the blade could not be prevented.
実施例３
実施例１と同様な構成の感光体において、電荷輸送層の
溶剤として、モノクロルベンゼンの代わりに、低沸点溶
媒である塩化メチレンやトルエン等を使用した。表面粗
度Ｒａ＝約０．０３ｕ！ｒ１で、凹凸周期が３００〜７
００μｍとなった。この場合、感光体表面に現像剤が残
留しておれば、現像剤が滑材として作用し、他の滑材を
使用しなくてもブレードの振動を生じさせることなく、
クリーニングを良好に行うことができた。この場合、感
光体表面に残留している５〜１５ＩｉＩｒ１の粒径の現
像剤が、滑材としての働きをしていると考えられる。Example 3 In a photoreceptor having the same structure as in Example 1, low boiling point solvents such as methylene chloride and toluene were used instead of monochlorobenzene as the solvent for the charge transport layer. Surface roughness Ra=about 0.03u! At r1, the unevenness period is 300 to 7
It became 00 μm. In this case, if the developer remains on the surface of the photoreceptor, the developer acts as a lubricant, and the blade does not vibrate without using any other lubricant.
Cleaning was successful. In this case, it is thought that the developer having a particle size of 5 to 15IiIr1 remaining on the surface of the photoreceptor functions as a lubricant.
実施例４ 比較例２の感光体表面をパフ研磨によって粗面化した。Example 4 The surface of the photoreceptor of Comparative Example 2 was roughened by puff polishing.
Ｒａ＝約１．ＯＪｕｒｉとした場合、凹凸周期が３５０
μｍ以上で必れば、クリーニング不良を発生ゼず、クリ
ーニングを良好に行うことができた。パフ研磨の条件を
変えて、Ｒａ≧１．１μｍで、凹凸周期が≦３００１Ｉ
Ｉｒｌ以下にすると、クリーニング不良が発生し易くな
ることが判明した。Ra=about 1. When OJuri is used, the unevenness period is 350
If the diameter was .mu.m or more, cleaning could be performed satisfactorily without causing any cleaning defects. By changing the conditions of puff polishing, Ra≧1.1μm and unevenness period≦3001I
It has been found that if the temperature is lower than Irl, cleaning defects are likely to occur.
発明の効果
本発明は、上記のように、感光体の表面粗度が上記式（
１） 、（２）及び（３）の関係を満足する場合には、
滑材の存在下でクリーニングを行うと、ブレードに振動
を生じることなく良好にクリーニングを行うことができ
る。Effects of the Invention As described above, the present invention provides that the surface roughness of the photoreceptor satisfies the above formula (
1) If the relationships of (2) and (3) are satisfied,
When cleaning is performed in the presence of a lubricant, cleaning can be performed satisfactorily without causing vibration to the blade.
第１図は、本発明のクリーニング方法を実施する状態を
説明するための説明図であり、第２図は、感光層の平均
表面粗さＲａと凹凸平均間隔Ｓｍとの関係を示すグラフ
である。
１・・・感光体、１ａ・・・粗面、２・・・ブレード、
３・・・滑材、４・・・現像剤。
凹凸平均間ＲＳｍFIG. 1 is an explanatory diagram for explaining the state in which the cleaning method of the present invention is carried out, and FIG. 2 is a graph showing the relationship between the average surface roughness Ra of the photosensitive layer and the average unevenness spacing Sm. . 1... Photoreceptor, 1a... Rough surface, 2... Blade,
3...Sliding material, 4...Developer. Average unevenness RSm
Claims (3)
擦しクリーニングする電子写真感光体のクリーニング方
法において、該感光層の平均表面粗さＲａが下記式（１
）の範囲にあり、凹凸平均間隔Ｓｍが、下記式（２）の
範囲にあり、かつ、ＲａとＳｍが下記式（３）の関係を
満たすことを特徴とする電子写真感光体のクリーニング
方法。 ０．０１μｍ≦Ｒａ≦１．１μｍ（１） １００μｍ≦Ｓｍ≦３０００μｍ（２） １．５×１０＾−＾３Ｓｍ＋０．４５≧Ｒａ≧４×１０
＾−＾４Ｓｍ−０．６（３）(1) In an electrophotographic photoreceptor cleaning method in which the photosensitive layer is rubbed and cleaned with a cleaning blade through a lubricant, the average surface roughness Ra of the photosensitive layer is determined by the following formula (1
), the average unevenness interval Sm is within the range of the following formula (2), and Ra and Sm satisfy the relationship of the following formula (3). 0.01μm≦Ra≦1.1μm (1) 100μm≦Sm≦3000μm (2) 1.5×10＾-＾3Sm+0.45≧Ra≧4×10
^-^4Sm-0.6(3)
として、アクリル系重合体、スチレン系重合体、スチレ
ン−アクリル系共重合体又はフッ素系共重合体よりなる
粒径０．０１μｍ〜２０μｍの範囲の微粉末を介在させ
ることを特徴とする請求項１記載の電子写真感光体のク
リーニング方法。(2) Between the blade and the photosensitive layer, a particle size of 0.01 μm made of an acrylic polymer, styrene polymer, styrene-acrylic copolymer, or fluorine copolymer is used as a lubricant or wear aid. 2. The method for cleaning an electrophotographic photoreceptor according to claim 1, wherein a fine powder having a particle diameter of 20 μm is interposed.
ブレードを、１５〜６０ｇ／ｃｍの圧力で当接し、クリ
ーニングすることを特徴とする請求項１記載の電子写真
感光体のクリーニング方法。(3) The method for cleaning an electrophotographic photoreceptor according to claim 1, wherein the cleaning is carried out by contacting a blade made of urethane resin with a rubber hardness of 70 to 80 degrees with a pressure of 15 to 60 g/cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25386188A JPH02101488A (en) | 1988-10-11 | 1988-10-11 | Cleaning method for electrophotographic photosensitive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25386188A JPH02101488A (en) | 1988-10-11 | 1988-10-11 | Cleaning method for electrophotographic photosensitive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02101488A true JPH02101488A (en) | 1990-04-13 |
Family
ID=17257150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25386188A Pending JPH02101488A (en) | 1988-10-11 | 1988-10-11 | Cleaning method for electrophotographic photosensitive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02101488A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7341813B2 (en) | 2002-06-26 | 2008-03-11 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, electrophotographic member, process cartridge and image forming apparatus |
| JP2021039194A (en) * | 2019-09-02 | 2021-03-11 | 株式会社リコー | Photoreceptor drum, image forming apparatus, and regeneration method for photoreceptor drum |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186867A (en) * | 1984-03-06 | 1985-09-24 | Fuji Xerox Co Ltd | Particle for covering surface of photosensitive body |
| JPS63106757A (en) * | 1986-10-24 | 1988-05-11 | Konica Corp | Image forming method and photosensitive body |
-
1988
- 1988-10-11 JP JP25386188A patent/JPH02101488A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186867A (en) * | 1984-03-06 | 1985-09-24 | Fuji Xerox Co Ltd | Particle for covering surface of photosensitive body |
| JPS63106757A (en) * | 1986-10-24 | 1988-05-11 | Konica Corp | Image forming method and photosensitive body |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7341813B2 (en) | 2002-06-26 | 2008-03-11 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, electrophotographic member, process cartridge and image forming apparatus |
| JP2021039194A (en) * | 2019-09-02 | 2021-03-11 | 株式会社リコー | Photoreceptor drum, image forming apparatus, and regeneration method for photoreceptor drum |
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