JPH0299962A - Dielectric member for electrostatic copying machine - Google Patents
Dielectric member for electrostatic copying machineInfo
- Publication number
- JPH0299962A JPH0299962A JP25161888A JP25161888A JPH0299962A JP H0299962 A JPH0299962 A JP H0299962A JP 25161888 A JP25161888 A JP 25161888A JP 25161888 A JP25161888 A JP 25161888A JP H0299962 A JPH0299962 A JP H0299962A
- Authority
- JP
- Japan
- Prior art keywords
- dielectric member
- pores
- resistance
- dielectric
- aluminum
- 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 19
- 239000005871 repellent Substances 0.000 claims abstract description 14
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 8
- 239000010407 anodic oxide Substances 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 9
- 230000007423 decrease Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000956 alloy Substances 0.000 abstract description 2
- 230000002940 repellent Effects 0.000 abstract 3
- 238000000465 moulding Methods 0.000 abstract 2
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 238000001035 drying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229940078494 nickel acetate Drugs 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/0202—Dielectric layers for electrography
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/14—Inert intermediate or cover layers for charge-receiving layers
- G03G5/147—Cover layers
- G03G5/14704—Cover layers comprising inorganic material
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は安定して高電気抵抗値を維持するアルミニウム
陽極酸化皮膜を設けた静電式複写機用誘電体部材に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dielectric member for an electrostatic copying machine provided with an aluminum anodic oxide film that stably maintains a high electrical resistance value.
［従来の技術］
従来、静電式複写機の誘電体ドラム（部材）はアルミニ
ウムパイプをドラム本体とし、このドラム本体の周面に
硬質アルマイト皮膜を形成している。この誘電体ドラム
は静電式複写機に組み込み、その周面に静電潜像を形成
する必要上、表面抵抗が約１０１０Ω以上であると共に
、体積抵抗が約１０１０Ωｃｍ以上であることが必要で
ある。しかも、この抵抗値は変動せず、安定したもので
あることが必要である。[Prior Art] Conventionally, a dielectric drum (member) of an electrostatic copying machine has an aluminum pipe as a drum body, and a hard alumite film is formed on the circumferential surface of the drum body. Since this dielectric drum is incorporated into an electrostatic copying machine and needs to form an electrostatic latent image on its circumferential surface, it needs to have a surface resistance of about 1010 Ω or more and a volume resistivity of about 1010 Ωcm or more. . Moreover, this resistance value must be stable and not fluctuate.
しかしなから、使用環境中の湿度変化により、ドラム本
体の周面の陽極酸化皮膜中の空隙に水分が侵入しやすく
、この水分の侵入により前記表面抵抗値及び体積抵抗値
か変化してしまうという難点かある。このため、従来の
静電式複写機においては、乾燥装置を設けて誘電体ドラ
ムを加熱し、これにより、陽極酸化皮膜を乾燥状態にし
て所要の表面抵抗値及び体積抵抗値を維持している。However, due to changes in humidity in the usage environment, moisture tends to enter the voids in the anodic oxide film on the peripheral surface of the drum body, and this intrusion of moisture causes changes in the surface resistance and volume resistance. There are some difficulties. For this reason, in conventional electrostatic copying machines, a drying device is installed to heat the dielectric drum, thereby drying the anodic oxide film and maintaining the required surface resistance and volume resistance. .
［発明が解決しようとする課題］
しかしながら、上述の如く誘電体ドラムの表面抵抗及び
体積抵抗の値を高く維持するために乾燥装置を設けるこ
とは、静電式複写機の小型化を著しく■害すると共に、
その構造を複雑化させてしまうという問題点がある。[Problems to be Solved by the Invention] However, as described above, providing a drying device to maintain high values of surface resistance and volume resistance of the dielectric drum significantly impedes miniaturization of electrostatic copying machines. With,
There is a problem in that the structure becomes complicated.
本発明はかかる問題点に鑑みてなされたものであって、
乾燥装置を使用することなく表面抵抗及び体積抵抗を安
定して所要の高値に維持することができる静電式複写機
用誘電体部材を提供することを目的とする。The present invention has been made in view of such problems, and includes:
It is an object of the present invention to provide a dielectric member for an electrostatic copying machine that can stably maintain surface resistance and volume resistance at required high values without using a drying device.
し課題を解決するための手段］
本発明に係る静電式複写機用誘電体部材は、アルミニウ
ム又はアルミニウム合金を支持部とする誘電体部材本体
と、この誘電体部材本体の表面に被着されたアルミニウ
ム陽極酸化皮膜とを有する静電式複写機用誘電体部材に
おいて、前記アルミニウム陽極酸化皮膜を撥水性物質で
封孔したことを特徴とする。Means for Solving the Problems] A dielectric member for an electrostatic copying machine according to the present invention includes a dielectric member main body whose support portion is made of aluminum or an aluminum alloy, and a dielectric member body that is adhered to the surface of the dielectric member main body. The dielectric member for an electrostatic copying machine has an aluminum anodic oxide film, characterized in that the aluminum anodic oxide film is sealed with a water-repellent substance.
［作用］
本発明においては、アルミニウム又はアルミニウム合金
材料をドラム状等に成形して支持部とした誘電体部材本
体の表面にアルミニウム陽極酸化皮膜を被着し、この陽
極酸化皮膜を撥水性の物質で封孔しである。[Function] In the present invention, an aluminum anodic oxide film is applied to the surface of a dielectric member main body made of aluminum or an aluminum alloy material formed into a drum shape or the like as a supporting part, and this anodic oxide film is coated with a water-repellent material. The hole is sealed.
アルミニウム陽極酸化皮膜は誘電体部材表面の耐摩耗性
を向上させるが、このアルミニウム陽極酸化皮膜は多孔
質であり、使用雰囲気中の水分がこの多孔中に侵入しや
すい。この水分が多孔中に侵入すると、前述の如く、誘
電体部材の表面抵抗及び体積抵抗が低下してしまう。し
かしながら、本発明においては、この多孔を撥水性の物
質で埋め込み、封孔しであるから、多孔中への水分の侵
入が防止され、従って、誘電体部材の表面抵抗及び体積
抵抗の低下が防止される。Although the aluminum anodic oxide film improves the abrasion resistance of the surface of the dielectric member, this aluminum anodic oxide film is porous, and moisture in the operating atmosphere easily enters into the pores. When this moisture enters the pores, the surface resistance and volume resistance of the dielectric member decrease as described above. However, in the present invention, the pores are filled with a water-repellent material and sealed, which prevents moisture from penetrating into the pores, thereby preventing a decrease in the surface resistance and volume resistance of the dielectric member. be done.
［実施例］ 以下、本発明について更に具体的に説明する。[Example] The present invention will be explained in more detail below.
静電式複写機の誘電体部材本体はアルミニウム又はアル
ミニウム合金により通常ドラム状に成形されており、こ
の誘電体ドラム本体の周面にアルミニウム陽極酸化皮膜
が形成される。この陽極酸化皮膜はビッカース硬度Ｈｖ
が４００乃至６００と高く、この誘電体ドラムが静電複
写機に組み込まれた場合に、ドクターブレード等の摺動
を受ける誘電体ドラムの周面の耐摩耗性を向上させる作
用を有する。The dielectric member body of an electrostatic copying machine is usually formed into a drum shape from aluminum or an aluminum alloy, and an aluminum anodic oxide film is formed on the circumferential surface of the dielectric drum body. This anodic oxide film has a Vickers hardness of Hv
is as high as 400 to 600, and when this dielectric drum is incorporated into an electrostatic copying machine, it has the effect of improving the abrasion resistance of the peripheral surface of the dielectric drum that is subjected to sliding by a doctor blade or the like.
本発明においては、この陽極酸化皮膜の上に水分を付着
させない撥水性の物質、例えば、シリコン樹脂又はフッ
素樹脂等をコーティングして、陽極酸化皮膜の孔に含浸
させ陽極酸化皮膜をこの撥水性物質で封孔しである。こ
れにより、使用環境中の水分は陽極酸化皮膜中の孔には
侵入しない。In the present invention, the anodic oxide film is coated with a water-repellent material that does not allow moisture to adhere, such as silicone resin or fluororesin, and is impregnated into the pores of the anodic oxide film to cover the anodic oxide film with the water-repellent material. The hole is sealed. This prevents moisture in the usage environment from entering the pores in the anodic oxide film.
従って、誘電体ドラムの表面抵抗及び体積抵抗の低下が
防止され、誘電体ドラムは安定して高抵抗を維持する。Therefore, the surface resistance and volume resistance of the dielectric drum are prevented from decreasing, and the dielectric drum stably maintains a high resistance.
このため、表面抵抗が１０１ＯΩ以上、体積抵抗が１０
１０ΩＣ以上という静電複写特性上要求される抵抗値を
十分に満足する誘電体ドラムが得られる。Therefore, the surface resistance is 101 OΩ or more, and the volume resistance is 10
A dielectric drum can be obtained which fully satisfies the resistance value of 10ΩC or more required for electrostatic copying characteristics.
撥水性物質としては、前述のシリコン樹脂又はフッ素樹
脂に限らず、撥水性を有するものであれば、種々使用可
能である。また、コーティング方法は通常実施されてい
る方法（例えば、脱気法による樹脂の含浸）により行え
ばよいが、撥水性物質の種類に応じて適切なものを選択
することが好ましい。The water-repellent material is not limited to the above-mentioned silicone resin or fluororesin, but various other materials can be used as long as they have water-repellent properties. Further, the coating method may be carried out by a commonly practiced method (for example, resin impregnation using a degassing method), but it is preferable to select an appropriate method depending on the type of water-repellent substance.
次に、本発明の実施例に係る誘電体ドラムを実際に製造
し、その特性を試験した結果について、その比較例の誘
電体ドラムについての試験結果と比較して説明する。Next, the results of actually manufacturing a dielectric drum according to an example of the present invention and testing its characteristics will be explained in comparison with the test results of a dielectric drum of a comparative example.
先ず、下記第１表に示す組成のアルミニウム合金を使用
して通常の方法により外径が６０ＩｌｌＩｌｌのパイプ
を製造した。First, a pipe having an outer diameter of 60IllIll was manufactured by a conventional method using an aluminum alloy having a composition shown in Table 1 below.
第１表（その］）
第１表（その２〉
このアルミニウム合金パイプの周面を表面粗さＲｍａｘ
が０．１μｍになるように鏡面加工した。Table 1 (Part 2) Table 1 (Part 2) The surface roughness of the circumferential surface of this aluminum alloy pipe is Rmax
Mirror processing was performed so that the diameter was 0.1 μm.
次に、このアルミニウム合金パイプを洗浄液で洗浄し、
更に、水洗した後、硫酸浴中て陽極酸化を行ない、厚さ
が５０μｍの陽極酸化皮膜を形成した。その後、撥水性
を有するテフロンをこの皮膜に含浸させた。Next, this aluminum alloy pipe is cleaned with a cleaning solution,
Furthermore, after washing with water, anodic oxidation was performed in a sulfuric acid bath to form an anodic oxide film with a thickness of 50 μm. This film was then impregnated with water-repellent Teflon.
このようにして製造した誘電体ドラムに対し、湿潤試験
装置を使用し、雰囲気の温度及び湿度を変化させて各条
件で体積抵抗を測定した。また、比較のために、陽極酸
化皮膜を形成した後、皮膜を蒸気封孔したものを比較例
１、未封孔のものを比較例２、酢酸ニッケルにより封孔
したものを比較例３として、これらの誘電体ドラムにつ
いても同様にして体積抵抗を測定した。この比較例１乃
至３は従来の静電式複写機に使用されている誘電体ドラ
ムと同等のものである。これらの誘電体ドラムの体積抵
抗の測定結果を第１図に示す。The volume resistivity of the dielectric drum thus manufactured was measured under various conditions using a wet test device and varying the temperature and humidity of the atmosphere. For comparison, after forming an anodized film, the film was vapor-sealed as Comparative Example 1, unsealed as Comparative Example 2, and sealed with nickel acetate as Comparative Example 3. The volume resistivity of these dielectric drums was also measured in the same manner. Comparative Examples 1 to 3 are equivalent to dielectric drums used in conventional electrostatic copying machines. The measurement results of the volume resistance of these dielectric drums are shown in FIG.
第１図の条件■は温度が２０°Ｃ１湿度が１０％の場合
、条件■は温度が２０℃、湿度が１００％の場合、条件
■は温度が５０℃、湿度が１０％の場合、条件■は温度
が５０℃、湿度が１００％の場合である。Condition ■ in Figure 1 is when the temperature is 20℃ and humidity is 10%, condition ■ is when the temperature is 20℃ and humidity is 100%, and condition ■ is when the temperature is 50℃ and humidity is 10%. (2) is a case where the temperature is 50° C. and the humidity is 100%.
この第１図から明らかなように、従来の誘電体ドラムと
同等である比較例１乃至３は、湿度が高くなると体積抵
抗値が著しく低下する。特に、室温（２０℃）において
は、比較例２，３は湿度が高くなると体積抵抗値が誘電
体ドラムの特性上必要な値（１０１０Ωｃｍ ）を満足
することができない。As is clear from FIG. 1, in Comparative Examples 1 to 3, which are equivalent to conventional dielectric drums, the volume resistance value decreases significantly when the humidity increases. In particular, at room temperature (20° C.), when the humidity becomes high, the volume resistivity of Comparative Examples 2 and 3 cannot satisfy the value (10 10 Ωcm 2 ) required for the characteristics of the dielectric drum.
この比較例１乃至３に比して、本実施例の誘電体ドラム
は温度及び湿度が変化しても体積抵抗は殆ど変化せず、
常に安定して高い抵抗値（１０’１Ω１以上）を有する
。Compared to Comparative Examples 1 to 3, the volume resistance of the dielectric drum of this example hardly changes even when the temperature and humidity change.
It always has a stable high resistance value (10'1Ω1 or more).
このように本実施例の誘電体ドラムは温度及び湿度が変
化しても、常に、誘電体ドラムの特性として必要な１０
１０Ωｃｍ以」二の体積抵抗を有する。In this way, the dielectric drum of this embodiment always maintains the required 10% as a characteristic of a dielectric drum even when the temperature and humidity change.
It has a volume resistivity of 10 Ωcm or more.
［発明の効果］
本発明によれば、アルミニウム陽極酸化皮膜の孔を撥水
性物質により封孔したがら、本発明に係る誘電体部材は
雰囲気の温度及び湿度に拘らず、常に安定して高い表面
抵抗値及び体積抵抗値を維持することができる。このた
め、この誘電体部材を使用すれば、乾燥装置が不要であ
り、本発明は静電式複写機の小型化に著しく寄与すると
いう効果を奏する。[Effects of the Invention] According to the present invention, since the pores of the aluminum anodic oxide film are sealed with a water-repellent substance, the dielectric member according to the present invention always maintains a stable and high surface surface regardless of the temperature and humidity of the atmosphere. The resistance value and volume resistance value can be maintained. Therefore, if this dielectric member is used, a drying device is not required, and the present invention has the effect of significantly contributing to miniaturization of electrostatic copying machines.
第１図は本発明の実施例及び比較例の体積抵抗と雰囲気
条件との関係を示すグラフ図である。FIG. 1 is a graph showing the relationship between volume resistivity and atmospheric conditions in Examples and Comparative Examples of the present invention.
Claims (1)
る誘電体部材本体と、この誘電体部材本体の表面に被着
されたアルミニウム陽極酸化皮膜とを有する静電式複写
機用誘電体部材において、前記アルミニウム陽極酸化皮
膜を撥水性物質で封孔したことを特徴とする静電式複写
機用誘電体部材。(1) A dielectric member for an electrostatic copying machine comprising a dielectric member main body having a support portion made of aluminum or an aluminum alloy, and an aluminum anodic oxide film deposited on the surface of the dielectric member main body, in which the aluminum A dielectric member for an electrostatic copying machine, characterized in that an anodized film is sealed with a water-repellent substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25161888A JPH0299962A (en) | 1988-10-05 | 1988-10-05 | Dielectric member for electrostatic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25161888A JPH0299962A (en) | 1988-10-05 | 1988-10-05 | Dielectric member for electrostatic copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0299962A true JPH0299962A (en) | 1990-04-11 |
Family
ID=17225506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25161888A Pending JPH0299962A (en) | 1988-10-05 | 1988-10-05 | Dielectric member for electrostatic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0299962A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5374343A (en) * | 1992-05-15 | 1994-12-20 | Anelva Corporation | Magnetron cathode assembly |
| US5422177A (en) * | 1992-01-27 | 1995-06-06 | Fuji Xerox Co., Ltd. | Polysiloxane dielectric member for carrying electrostatic latent image |
-
1988
- 1988-10-05 JP JP25161888A patent/JPH0299962A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5422177A (en) * | 1992-01-27 | 1995-06-06 | Fuji Xerox Co., Ltd. | Polysiloxane dielectric member for carrying electrostatic latent image |
| US5374343A (en) * | 1992-05-15 | 1994-12-20 | Anelva Corporation | Magnetron cathode assembly |
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