JPH0580650A - Composite roll - Google Patents
Composite rollInfo
- Publication number
- JPH0580650A JPH0580650A JP3273403A JP27340391A JPH0580650A JP H0580650 A JPH0580650 A JP H0580650A JP 3273403 A JP3273403 A JP 3273403A JP 27340391 A JP27340391 A JP 27340391A JP H0580650 A JPH0580650 A JP H0580650A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- foam layer
- conductive
- foamed
- conductive foam
- 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
Landscapes
- Wet Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電子写真複写機の現
像ロールおよび給紙ロール等に用いられる複合ロールに
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite roll used as a developing roll and a paper feed roll of an electrophotographic copying machine.
【０００２】[0002]
【従来の技術】電子写真複写機等の複写方式の一つとし
て、接触複写方式がある。この接触複写方式は、図２に
示すように、光導電体表面層付きの感光ドラム１１の外
周面を一様に帯電させ、ついで被複写体の被複写像を介
してその外周面を露光することにより、上記外周面上に
静電潜像を形成する。つぎに、上記感光ドラム１１と接
触状に配設されている現像ロール１２の上に、トナー供
給装置（図示せず）から現像剤（トナー）を供給し、現
像ロール１２の外周面と層形成ブレード１３との間に摩
擦力によつてトナーを摩擦帯電させ、これを感光ドラム
１１の静電潜像と接触させトナー像を形成する。このよ
うな接触複写方式により上記感光ドラム１１に形成され
たトナー像を複写紙１４に転写して定着することにより
複写が行われる。そして、このような複写方式におい
て、最近、いわゆる２値現像方法が採用されている。こ
の２値現像方法とは、従来のアナログ現像方法（静電潜
像の帯電量に比例してトナーの付着量を増減し濃淡を表
す）に代わるもので、静電潜像の各部を微細なマス目に
区切り、そのマス目のトナーによる埋まり度合いで濃淡
をデジタルに表す方法である。この２値現像方法を上記
接触複写方式に採用する場合に、上記現像ロール１２が
トナーを適度に周方向に搬送するには、例えば現像ロー
ル１２表面が柔軟性を有することを必要とする。そし
て、上記現像ロール１２は、例えば金属製の軸体の外周
に、導電性チユーブを嵌挿し、さらに上記導電性チユー
ブを嵌挿した軸体の外周に、薄膜チユーブを嵌挿するこ
とによつて作製される。2. Description of the Related Art A contact copying system is one of copying systems for electrophotographic copying machines and the like. In this contact copying method, as shown in FIG. 2, the outer peripheral surface of the photosensitive drum 11 having the photoconductor surface layer is uniformly charged, and then the outer peripheral surface is exposed through the copied image of the copied object. As a result, an electrostatic latent image is formed on the outer peripheral surface. Next, a developer (toner) is supplied from a toner supply device (not shown) onto the developing roll 12 arranged in contact with the photosensitive drum 11 to form a layer on the outer peripheral surface of the developing roll 12. The toner is frictionally charged between the blade 13 and the blade 13 by a frictional force, and the toner is brought into contact with the electrostatic latent image on the photosensitive drum 11 to form a toner image. Copying is performed by transferring and fixing the toner image formed on the photosensitive drum 11 to the copy paper 14 by such a contact copying method. In such a copying method, a so-called binary developing method has recently been adopted. This binary development method is an alternative to the conventional analog development method (representing light and shade by increasing or decreasing the toner adhesion amount in proportion to the charge amount of the electrostatic latent image), and finely controlling each part of the electrostatic latent image. This is a method of dividing the cells into squares and digitally expressing the shade by the degree of filling with toner in the squares. When the binary developing method is adopted in the contact copying method, in order for the developing roller 12 to properly convey the toner in the circumferential direction, for example, the surface of the developing roller 12 needs to have flexibility. In the developing roll 12, for example, a conductive tube is fitted on the outer circumference of a metal shaft body, and a thin film tube is fitted on the outer circumference of the shaft body fitted with the conductive tube. It is made.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ようにして作製された現像ロール１２では、導電性チユ
ーブと薄膜チユーブ間に空間が形成され電気的に不都合
が生じたり、薄膜チユーブが剥離するという問題が生じ
る。また、電気的不都合および剥離問題は、上記導電性
チユーブと薄膜チユーブ間だけでなく、軸体と導電性チ
ユーブ間にも生じてしまう。However, in the developing roll 12 manufactured as described above, a space is formed between the conductive tube and the thin film tube, which causes an electrical problem, or the thin film tube is peeled off. The problem arises. Further, the electrical inconvenience and the peeling problem occur not only between the conductive tube and the thin film tube but also between the shaft body and the conductive tube.
【０００４】この発明は、このような事情に鑑みなされ
たもので、弾性に優れ、電気的不都合および層間剥離の
生じない複合ロールの提供をその目的とする。The present invention has been made in view of the above circumstances, and an object thereof is to provide a composite roll which is excellent in elasticity and does not cause electrical inconvenience and delamination.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに、この発明の複合ロールは、導電性を有する軸体の
外周に導電性発泡体層が形成され、さらに上記導電性発
泡体層の外周に半導電性非発泡体層が形成された複合ロ
ールであつて、上記導電性発泡体層が、内周層の発泡部
分と外周層の非発泡表皮部分の２層構造に一体形成さ
れ、上記半導電性非発泡体層が、体積抵抗１０4 〜１０
12Ω・cmの範囲に設定されているという構成をとる。In order to achieve the above object, the composite roll of the present invention has a conductive foam layer formed on the outer periphery of a shaft having conductivity, and the conductive foam layer is further formed. A composite roll having a semi-conductive non-foamed layer formed on the outer periphery of the above, wherein the conductive foamed layer is integrally formed in a two-layer structure of a foamed portion of the inner peripheral layer and a non-foamed skin portion of the outer peripheral layer. , The semiconductive non-foam layer has a volume resistance of 10 4 to 10
The configuration is such that it is set in the range of 12 Ω · cm.
【０００６】[0006]
【作用】すなわち、本発明者らは、弾性に優れ、しかも
電気的不都合および層間剥離の生じない複合ロールを得
るために一連の研究を重ねた。その結果、軸体の外周
に、内周層の発泡部分と外周層の非発泡表皮部分の２層
構造に一体形成された導電性発泡体層を形成し、さらに
上記導電性発泡体層の外周に半導電性非発泡体層を形成
すると、層間に空間が形成されず電気的に均一に導通
し、しかも剥離等が生じないことを見出しこの発明に到
達した。In other words, the present inventors have conducted a series of studies in order to obtain a composite roll that is excellent in elasticity and does not cause electrical inconvenience and delamination. As a result, a conductive foam layer integrally formed in a two-layer structure of the foamed portion of the inner peripheral layer and the non-foamed skin portion of the outer peripheral layer is formed on the outer periphery of the shaft body, and the outer periphery of the conductive foamed layer is further formed. The present inventors have found that when a semiconductive non-foamed layer is formed on the layer, no space is formed between the layers, the layer is electrically uniformly conducted, and peeling does not occur.
【０００７】つぎに、この発明について詳細に説明す
る。Next, the present invention will be described in detail.
【０００８】この発明の複合ロールは、軸体と、上記軸
体の外周に形成される導電性発泡体層と、さらに上記導
電性発泡体層の外周に形成される半導電性非発泡体層と
から構成される。The composite roll of the present invention comprises a shaft body, a conductive foam layer formed on the outer periphery of the shaft body, and a semiconductive non-foam layer formed on the outer periphery of the conductive foam layer. Composed of and.
【０００９】上記軸体としては、導電性を有するもので
あれば特に限定するものではなく、金属製の中実体から
なる芯金や、内部を中空にくり抜いた金属製の円筒体が
用いられる。The shaft is not particularly limited as long as it has conductivity, and a cored bar made of a solid metal body or a metal cylindrical body hollowed out inside is used.
【００１０】また、上記軸体の外周に沿つて形成される
導電性発泡体層は、内周層の発泡部分と外周層の非発泡
表皮部分（インテグラルスキン層）の２層に構成されて
いる。上記導電性発泡体層の形成材料としては、合成固
形ゴムおよび天然固形ゴムの少なくとも一方と、液状ゴ
ムと、導電材と、発泡剤とが用いられる。上記合成固形
ゴムとしては、イソプレンゴム，スチレン−ブタジエン
ゴム，エチレン−プロピレンゴム等があげられる。上記
液状ゴムとしては、液状イソプレンゴム，液状ブタジエ
ンゴム等があげられ、粘度５〜２００００ポイズ（４０
℃）のものを用いるのが好適である。そして、これら液
状ゴムは、数平均分子量が５×１０2 〜５×１０4 の低
分子量のものを用いるのが好ましい。上記固形ゴム
（Ａ）と液状ゴム（Ｂ）の配合割合は、重量比でＡ／Ｂ
＝２０／８０〜８０／２０の範囲に設定することが好ま
しい。また、上記導電材としては、カーボンブラツク等
があげられ、その配合量は上記ゴム成分（固形ゴムおよ
び液状ゴム）１００重量部（以下「部」と略す）に対し
て５〜４０部に設定するのが好ましい。さらに、上記発
泡剤としては、特に限定するものではなく従来公知のも
のが用いられ、例えばジアゾアミノベンゼン，ジニトロ
ソペンタメチレンテトラミン，ベンゾールスルホニルヒ
ドラジド等があげられる。上記発泡剤の配合量として
は、上記ゴム成分（固形ゴムおよび液状ゴム）１００部
に対して０．５〜１５部の範囲に設定することが好まし
い。そして、上記導電性発泡体層形成材料には、上記材
料以外に必要に応じて加硫剤，加硫促進剤，加硫促進助
剤等の他の添加剤を適宜配合することができる。The conductive foam layer formed along the outer periphery of the shaft is composed of two layers, that is, the foamed portion of the inner peripheral layer and the non-foamed skin portion (integral skin layer) of the outer peripheral layer. There is. As the material for forming the conductive foam layer, at least one of synthetic solid rubber and natural solid rubber, liquid rubber, a conductive material, and a foaming agent are used. Examples of the synthetic solid rubber include isoprene rubber, styrene-butadiene rubber, ethylene-propylene rubber and the like. Examples of the liquid rubber include liquid isoprene rubber and liquid butadiene rubber, which have a viscosity of 5 to 20000 poise (40
It is preferable to use the one of (.degree. C.). And it is preferable to use these liquid rubbers having a low molecular weight of 5 × 10 2 to 5 × 10 4 as the number average molecular weight. The solid rubber (A) and the liquid rubber (B) are mixed in a weight ratio of A / B.
= 20/80 to 80/20 is preferably set. Examples of the conductive material include carbon black and the like, and the compounding amount thereof is set to 5 to 40 parts with respect to 100 parts by weight of the rubber component (solid rubber and liquid rubber) (hereinafter abbreviated as “part”). Is preferred. Further, the foaming agent is not particularly limited, and conventionally known ones are used, and examples thereof include diazoaminobenzene, dinitrosopentamethylenetetramine, benzolsulfonyl hydrazide and the like. The compounding amount of the foaming agent is preferably set in the range of 0.5 to 15 parts with respect to 100 parts of the rubber component (solid rubber and liquid rubber). In addition to the above materials, other additives such as a vulcanizing agent, a vulcanization accelerator, and a vulcanization acceleration aid can be appropriately blended with the above-mentioned conductive foam layer forming material.
【００１１】上記２層構造の導電性発泡体層の外周に形
成される半導電性非発泡体層の形成材料としては、高分
子材料と、導電材等があげられる。上記高分子材料とし
ては、Ｎ−メトキシメチル化ナイロン（８−ナイロ
ン），エピクロルヒドリンゴム等のゴム、合成樹脂等が
あげられる。また、上記導電材としては、カーボンブラ
ツク等があげられる。さらに、上記半導電性非発泡体層
形成材料には、上記材料以外に必要に応じて加硫剤，加
硫促進剤，加硫促進助剤等の他の添加剤を適宜配合する
ことができる。Materials for forming the semi-conductive non-foam layer formed on the outer periphery of the above-mentioned two-layer conductive foam layer include polymer materials and conductive materials. Examples of the polymer material include N-methoxymethylated nylon (8-nylon), rubber such as epichlorohydrin rubber, synthetic resin and the like. Examples of the conductive material include carbon black. Further, in addition to the above materials, other additives such as a vulcanizing agent, a vulcanization accelerator, and a vulcanization acceleration aid can be appropriately added to the above-mentioned semiconductive non-foam layer forming material. ..
【００１２】この発明の複合ロールは、例えばつぎのよ
うにして得られる。すなわち、まず上記各導電性発泡体
層形成材料を配合する。そして、軸体（芯金）を配置し
た成形型内に上記配合物を充填し加熱加硫すると、内部
は発泡して発泡体部分が形成され、成形型に接触する部
分の表面層は発泡せず非発泡表皮部分（インテグラルス
キン層）が形成された、すなわち発泡体部分とその外周
部分に非発泡表皮部分が形成された２層構造の導電性発
泡体層が形成される。ついで、上記各半導電性非発泡体
層形成材料を配合し混合して、これを有機溶媒に溶解さ
せる。そして、この溶液を上記導電性発泡体層外表面
に、デイツプ法，ロールコート法，スプレーコーテイン
グ法等によつて塗工し乾燥させ、架橋させることにより
半導電性非発泡体層を形成する。このようにして、図１
に示すような複合ロール１を製造することができる。図
において、２は芯金、３ａは導電性発泡体層３における
発泡部分、３ｂは導電性発泡体層３における非発泡表皮
部分（インテグラルスキン層部分）、４は半導電性非発
泡体層である。また、上記製法において、成形型を用い
て導電性発泡体層を作製する代わりに、導電性発泡体層
形成材料を用いて円筒状に押出成形し、この押出成形し
たものの外周表面に硬化剤を塗布し加熱してもよい。こ
のような工程を経ても、上記のような２層構造の導電性
発泡体層が形成される。The composite roll of the present invention is obtained, for example, as follows. That is, first, each of the above-mentioned conductive foam layer forming materials is blended. Then, when the above-mentioned composition is filled in a molding die in which a shaft (core metal) is placed and heated and vulcanized, the inside is foamed to form a foam portion, and the surface layer of the portion in contact with the molding die is foamed. A non-foamed skin part (integral skin layer) is formed, that is, a conductive foam layer having a two-layer structure is formed in which a non-foamed skin part is formed on the foam part and its peripheral part. Next, the above semiconductive non-foam layer forming materials are blended and mixed, and this is dissolved in an organic solvent. Then, this solution is applied to the outer surface of the conductive foam layer by a dip method, a roll coating method, a spray coating method or the like, dried, and crosslinked to form a semiconductive non-foam layer. In this way, FIG.
The composite roll 1 as shown in can be manufactured. In the figure, 2 is a core metal, 3a is a foamed part in the conductive foam layer 3, 3b is a non-foamed skin part (integral skin layer part) in the conductive foamed layer 3, and 4 is a semi-conductive non-foamed layer. Is. Further, in the above manufacturing method, instead of producing a conductive foam layer using a molding die, a conductive foam layer forming material is extruded into a cylindrical shape, and a curing agent is applied to the outer peripheral surface of the extruded product. You may apply and heat. Even through such steps, the conductive foam layer having the two-layer structure as described above is formed.
【００１３】この複合ロール１は、導電性発泡体層３の
厚みを２〜５０mmに、また硬度をＪＩＳ Ａ ３０°以
下に設定するのが好ましい。そして、上記半導電性非発
泡体層４の体積抵抗率を１０4 〜１０12Ω・cmに設定
し、しかもその厚みを５〜１０００μｍに設定するのが
好ましい。すなわち、半導電性非発泡体層４の体積抵抗
率が１０4 Ω・cm未満では、リークが発生し、逆に１０
12Ω・cmを超えると充分な電流が得られず良好な画像濃
度が得られなくなる傾向がみられるからである。また、
半導電性非発泡体層４の厚みが５μｍ未満では耐久性に
劣り、１０００μｍを超えると充分なニツプ幅が得られ
なくなるからである。In the composite roll 1, it is preferable to set the thickness of the conductive foam layer 3 to 2 to 50 mm and the hardness to JIS A 30 ° or less. The volume resistivity of the semiconductive non-foamed layer 4 is preferably set to 10 4 to 10 12 Ω · cm, and the thickness thereof is preferably set to 5 to 1000 μm. That is, when the volume resistivity of the semi-conductive non-foamed layer 4 is less than 10 4 Ω · cm, leakage occurs, and conversely 10
This is because if it exceeds 12 Ω · cm, a sufficient current cannot be obtained, and it tends to be impossible to obtain a good image density. Also,
This is because if the thickness of the semiconductive non-foamed layer 4 is less than 5 μm, the durability is poor, and if it exceeds 1000 μm, a sufficient nap width cannot be obtained.
【００１４】なお、上記複合ロール１は、導電性発泡体
層３と半導電性非発泡体層４とから形成されているが、
これに限るものではなく、さらに半導電性非発泡体層４
の外周面に単層または複層を順次形成してもよい。The composite roll 1 is composed of the conductive foam layer 3 and the semiconductive non-foam layer 4,
It is not limited to this, and the semi-conductive non-foam layer 4
A single layer or multiple layers may be sequentially formed on the outer peripheral surface of.
【００１５】[0015]
【発明の効果】以上のように、この発明の複合ロール
は、軸体の外周に、内周層の発泡部分と外周層の非発泡
表皮部分の２層構造に一体形成された導電性発泡体層が
形成され、さらに上記導電性発泡体層の外周に半導電性
非発泡体層が形成されている。したがつて、上記導電性
発泡体層と半導電性非発泡体層間、また導電性発泡体層
と軸体間に空間が形成されず電気的に均一に導通し、し
かも剥離等が生じない。さらに、厚みが均一で弾性に富
んでいる。As described above, the composite roll of the present invention is a conductive foam integrally formed on the outer periphery of the shaft body in a two-layer structure of the foamed portion of the inner peripheral layer and the non-foamed skin portion of the outer peripheral layer. A layer is formed, and a semiconductive non-foam layer is further formed on the outer periphery of the conductive foam layer. Therefore, no space is formed between the conductive foam layer and the semi-conductive non-foam layer, or between the conductive foam layer and the shaft, so that electrical continuity is achieved and peeling does not occur. Furthermore, it has a uniform thickness and is highly elastic.
【００１６】つぎに、実施例について比較例と併せて説
明する。Next, examples will be described together with comparative examples.
【００１７】[0017]
【実施例１〜４】下記の表１に示す各成分を準備し、同
表に示す割合で配合して混練することによりそれぞれ導
電性発泡体層形成材料と半導電性非発泡体層形成材料を
作製した。そして、芯金が設置された成形金型内に上記
導電性発泡体層形成材料を充填し加熱加硫することによ
り導電性発泡体層を形成した。ついで、上記半導電性非
発泡体層形成材料を同表に示す溶剤に溶解して、この溶
液を上記導電性発泡体層の外周面にコーテイングした。
つぎに、加熱して架橋させることにより半導電性非発泡
体層を形成した。このようにして、図１に示す複合ロー
ルを作製した。[Examples 1 to 4] Each component shown in Table 1 below was prepared, mixed in the proportions shown in the same table, and kneaded to obtain a conductive foam layer forming material and a semiconductive non-foam layer forming material, respectively. Was produced. Then, a conductive foam layer was formed by filling the above-mentioned conductive foam layer forming material in a molding die having a cored bar and heating and vulcanizing the material. Then, the semiconductive non-foam layer forming material was dissolved in the solvent shown in the same table, and this solution was coated on the outer peripheral surface of the conductive foam layer.
Next, a semiconductive non-foamed layer was formed by heating and crosslinking. In this way, the composite roll shown in FIG. 1 was produced.
【００１８】なお、下記の表１において、（ ）内の数
字は部を表す。また、液状イソプレンゴムはクラレ社
製，ＬＩＲ−３０で、液状ブタジエンゴムは日本曹達社
製，Ｂ−１０００で、発泡剤であるアゾジカルボンアミ
ドは三協化成社製，セルマイクＣＡＰ−５００で、ジニ
トロソペンタメチレンテトラミンは三協化成社製，セル
マイクＡＮで、４，４′−オキシビスベンゼンスルホニ
ルヒドラジツドは三協化成社製，セルマイクＳで、パラ
トルエンスルホニルアセトンヒドラゾーンは三協化成社
製，セルマイクＫである。In Table 1 below, the numbers in parentheses () indicate parts. Liquid isoprene rubber is LIR-30 manufactured by Kuraray Co., Ltd., liquid butadiene rubber is B-1000 manufactured by Nippon Soda Co., Ltd., and azodicarbonamide as a foaming agent is SELMIC CAP-500 manufactured by Sankyo Kasei Co., Ltd. Nitrosopentamethylenetetramine is Sankyo Kasei's Celmic AN, 4,4'-oxybisbenzenesulfonylhydrazide is Sankyo Kasei's Celmic S, paratoluenesulfonylacetonehydrazone is Sankyo Kasei's. This is Celmic K.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【比較例】下記の表２に示す成分を準備し配合すること
により導電性チユーブ形成材料を作製した。そして、こ
の導電性チユーブ形成材料を用い、押出機によりチユー
ブ状に押し出した後、オーブンにて加熱加硫することに
より導電性チユーブを作製した。また、同表に示す成分
を準備し配合することにより薄膜チユーブ形成材料を作
製し、この薄膜チユーブ形成材料を用い、押出機により
シヤフトを覆うチユーブ状に押し出してオーブンにて加
熱加硫した。ついで研磨機によりシヤフト上の材料を所
定の厚みに研磨することにより薄膜チユーブを作製し
た。ついで、芯金（シヤフト）に上記導電性チユーブを
嵌挿して、さらに薄膜チユーブを嵌挿することにより複
合ロールを作製した。Comparative Example A conductive tube forming material was prepared by preparing and mixing the components shown in Table 2 below. Then, using this conductive tube forming material, it was extruded into a tube shape by an extruder and then heated and vulcanized in an oven to prepare a conductive tube. Further, a thin-film tube-forming material was prepared by preparing and blending the components shown in the same table, and using this thin-film tube-forming material, it was extruded into a tube shape covering the shaft with an extruder and heat-vulcanized in an oven. Then, a thin film tube was prepared by polishing the material on the shaft to a predetermined thickness with a polishing machine. Then, the above-mentioned conductive tube was fitted into the core metal (shuffle), and further the thin film tube was fitted thereinto to produce a composite roll.
【００２１】[0021]
【表２】 [Table 2]
【００２２】このようにして得られた各複合ロールにつ
いて、導電性発泡体層の硬度（ＪＩＳ Ｋ ６３０１に
準ずる），体積抵抗率，圧縮永久歪を測定し、さらに半
導電性非導電性発泡体層の加工性を測定した。なお、体
積抵抗率は、図３に示す形状の電極２１をロール表面上
に形成して、図４に示す測定系により測定した。図にお
いて、２０はロール、２１ａは主電極、２１ｂはガード
電極である。また、圧縮永久歪は、加硫ゴム物理試験方
法（ＪＩＳ Ｋ ６３０１）圧縮永久歪試験に基づき測
定した。なお、圧縮の割合は試験片の厚みの２５％と
し、熱処理温度，熱処理時間はそれぞれ７０℃，２２時
間とした。さらに、上記加工性はコーテイング時のオイ
ル抜けおよびコーテイングむらの発生の有無により評価
した。With respect to each of the composite rolls thus obtained, the hardness (according to JIS K 6301), volume resistivity and compression set of the conductive foam layer were measured, and the semiconductive non-conductive foam was further measured. The processability of the layers was measured. The volume resistivity was measured by the measurement system shown in FIG. 4 after forming the electrode 21 having the shape shown in FIG. 3 on the roll surface. In the figure, 20 is a roll, 21a is a main electrode, and 21b is a guard electrode. The compression set was measured based on the vulcanized rubber physical test method (JIS K 6301) compression set test. The compression ratio was 25% of the thickness of the test piece, and the heat treatment temperature and heat treatment time were 70 ° C. and 22 hours, respectively. Further, the workability was evaluated by the presence or absence of oil loss during coating and coating unevenness.
【００２３】[0023]
【表３】 [Table 3]
【００２４】[0024]
【表４】 [Table 4]
【００２５】上記表３および表４の結果から、実施例品
は硬度が低く弾性に富んでおり、圧縮永久歪の値が低く
へたりが少ない。このことから、実施例品は適度な弾性
を有し、しかも電気的に均一に導通しており、また層間
剥離の生じないものである。From the results shown in Tables 3 and 4, the products of Examples have a low hardness and a high elasticity, a low value of compression set, and a small settling. From this fact, the products of Examples have appropriate elasticity, are electrically conductive evenly, and do not cause delamination.
【図１】この発明の複合ロールの断面図である。FIG. 1 is a sectional view of a composite roll of the present invention.
【図２】接触複写方式の説明図である。FIG. 2 is an explanatory diagram of a contact copying method.
【図３】電極の構成および形状を示す平面図である。FIG. 3 is a plan view showing the configuration and shape of electrodes.
【図４】複合ロールの電気抵抗を測定するための測定系
を示す構成図である。FIG. 4 is a configuration diagram showing a measurement system for measuring the electric resistance of a composite roll.
１ 複合ロール ２ 芯金 ３ 導電性発泡体層 ３ａ 発泡部分 ３ｂ 非発泡表皮部分 ４ 半導電性非発泡体層 DESCRIPTION OF SYMBOLS 1 Composite roll 2 Core metal 3 Conductive foam layer 3a Foaming part 3b Non-foaming skin part 4 Semi-conductive non-foaming layer
Claims (2)
体層が形成され、さらに上記導電性発泡体層の外周に半
導電性非発泡体層が形成された複合ロールであつて、上
記導電性発泡体層が、内周層の発泡部分と外周層の非発
泡表皮部分の２層構造に一体形成され、上記半導電性非
発泡体層が、体積抵抗１０4 〜１０12Ω・cmの範囲に設
定されていることを特徴とする複合ロール。1. A composite roll in which a conductive foam layer is formed on the outer circumference of a shaft having conductivity, and a semiconductive non-foam layer is further formed on the outer circumference of the conductive foam layer. The conductive foam layer is integrally formed in a two-layer structure of a foamed portion of the inner peripheral layer and a non-foamed skin portion of the outer peripheral layer, and the semiconductive non-foamed layer has a volume resistance of 10 4 to 10 12 Ω. A composite roll characterized by being set in the range of cm.
０μｍである請求項１記載の複合ロール。2. The semiconductive non-foamed layer has a thickness of 5 to 100.
The composite roll according to claim 1, which has a thickness of 0 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3273403A JPH0580650A (en) | 1991-09-24 | 1991-09-24 | Composite roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3273403A JPH0580650A (en) | 1991-09-24 | 1991-09-24 | Composite roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0580650A true JPH0580650A (en) | 1993-04-02 |
Family
ID=17527411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3273403A Pending JPH0580650A (en) | 1991-09-24 | 1991-09-24 | Composite roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0580650A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6167225A (en) * | 1994-01-10 | 2000-12-26 | Research Laboratories Of Australia Pty Ltd | Liquid developing method of electrostatic latent image and liquid developing apparatus |
| JP2008209668A (en) * | 2007-02-27 | 2008-09-11 | Tokai Rubber Ind Ltd | Developing roll |
| JP2008209667A (en) * | 2007-02-27 | 2008-09-11 | Tokai Rubber Ind Ltd | Developing roll |
| JP2012058322A (en) * | 2010-09-06 | 2012-03-22 | Canon Inc | Developing roller, its manufacturing method, process cartridge and image forming apparatus |
| JP2017016035A (en) * | 2015-07-03 | 2017-01-19 | 富士ゼロックス株式会社 | Conductive roll, transfer unit, and image forming apparatus |
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|---|---|---|---|---|
| JPS61150370U (en) * | 1985-03-08 | 1986-09-17 | ||
| JPS61273458A (en) * | 1985-05-28 | 1986-12-03 | Tokai Rubber Ind Ltd | Conductive roller and manufacture thereof |
| JPS62239166A (en) * | 1986-04-11 | 1987-10-20 | Yamauchi Corp | Paper feeding roll used in image forming device |
| JPS6352165A (en) * | 1986-08-22 | 1988-03-05 | Fuji Xerox Co Ltd | Electrostatic latent image developing device |
| JPS63103276A (en) * | 1986-10-20 | 1988-05-07 | Ricoh Co Ltd | Image forming device |
| JPS63192070A (en) * | 1987-02-04 | 1988-08-09 | Canon Inc | Fixing device |
| JPH01186981A (en) * | 1988-01-21 | 1989-07-26 | Hokushin Ind Inc | Roller for nonmagnetic one-component development |
| JPH02226282A (en) * | 1989-02-28 | 1990-09-07 | Canon Inc | Transfer device |
| JPH02266109A (en) * | 1989-04-05 | 1990-10-30 | Inoue Mtp Co Ltd | Electrically conductive roller and manufacture thereof |
| JPH03223878A (en) * | 1990-01-30 | 1991-10-02 | Ricoh Co Ltd | Manufacture of developer carrier |
| JPH0535110A (en) * | 1991-07-26 | 1993-02-12 | Bridgestone Corp | Manufacture of foamed body for roll |
| JPH0546020A (en) * | 1991-03-22 | 1993-02-26 | Seiko Epson Corp | Developing device |
-
1991
- 1991-09-24 JP JP3273403A patent/JPH0580650A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61150370U (en) * | 1985-03-08 | 1986-09-17 | ||
| JPS61273458A (en) * | 1985-05-28 | 1986-12-03 | Tokai Rubber Ind Ltd | Conductive roller and manufacture thereof |
| JPS62239166A (en) * | 1986-04-11 | 1987-10-20 | Yamauchi Corp | Paper feeding roll used in image forming device |
| JPS6352165A (en) * | 1986-08-22 | 1988-03-05 | Fuji Xerox Co Ltd | Electrostatic latent image developing device |
| JPS63103276A (en) * | 1986-10-20 | 1988-05-07 | Ricoh Co Ltd | Image forming device |
| JPS63192070A (en) * | 1987-02-04 | 1988-08-09 | Canon Inc | Fixing device |
| JPH01186981A (en) * | 1988-01-21 | 1989-07-26 | Hokushin Ind Inc | Roller for nonmagnetic one-component development |
| JPH02226282A (en) * | 1989-02-28 | 1990-09-07 | Canon Inc | Transfer device |
| JPH02266109A (en) * | 1989-04-05 | 1990-10-30 | Inoue Mtp Co Ltd | Electrically conductive roller and manufacture thereof |
| JPH03223878A (en) * | 1990-01-30 | 1991-10-02 | Ricoh Co Ltd | Manufacture of developer carrier |
| JPH0546020A (en) * | 1991-03-22 | 1993-02-26 | Seiko Epson Corp | Developing device |
| JPH0535110A (en) * | 1991-07-26 | 1993-02-12 | Bridgestone Corp | Manufacture of foamed body for roll |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6167225A (en) * | 1994-01-10 | 2000-12-26 | Research Laboratories Of Australia Pty Ltd | Liquid developing method of electrostatic latent image and liquid developing apparatus |
| JP2008209668A (en) * | 2007-02-27 | 2008-09-11 | Tokai Rubber Ind Ltd | Developing roll |
| JP2008209667A (en) * | 2007-02-27 | 2008-09-11 | Tokai Rubber Ind Ltd | Developing roll |
| JP2012058322A (en) * | 2010-09-06 | 2012-03-22 | Canon Inc | Developing roller, its manufacturing method, process cartridge and image forming apparatus |
| JP2017016035A (en) * | 2015-07-03 | 2017-01-19 | 富士ゼロックス株式会社 | Conductive roll, transfer unit, and image forming apparatus |
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