JPH10228187A - Production of toner image transfer roll and toner image transfer roll - Google Patents

Production of toner image transfer roll and toner image transfer roll

Info

Publication number
JPH10228187A
JPH10228187A JP3183997A JP3183997A JPH10228187A JP H10228187 A JPH10228187 A JP H10228187A JP 3183997 A JP3183997 A JP 3183997A JP 3183997 A JP3183997 A JP 3183997A JP H10228187 A JPH10228187 A JP H10228187A
Authority
JP
Japan
Prior art keywords
toner image
image transfer
transfer roller
layer
conductive
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
Application number
JP3183997A
Other languages
Japanese (ja)
Inventor
Shinji Saito
親二 齊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Kogyo Co Ltd
Original Assignee
Nitto Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitto Kogyo Co Ltd filed Critical Nitto Kogyo Co Ltd
Priority to JP3183997A priority Critical patent/JPH10228187A/en
Publication of JPH10228187A publication Critical patent/JPH10228187A/en
Pending legal-status Critical Current

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  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

PROBLEM TO BE SOLVED: To produce a toner image transfer roll having low hardness, satisfactory flatness and no unevenness in surface electric conductivity, hardness, etc., as an elastic transfer roll with a resin layer on the surface and simplifying producing process. SOLUTION: When an elastic layer 42 of electrically conductive rubber and an electrically conductive resin layer 43 are successively laminated on the periphery of a core metal 41 to produce a toner image transfer roll, an elastic layer 42 of electrically conductive foamed ethylene-propylene-diene rubber is formed on the periphery of the core metal 41, the resultant elastic roll is coated with an electrically conductive chlorinated PE resin tube and the rubber and resin are fused by heating the roll.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明はトナー像転写ローラ
に関し、特に電子写真装置において現像された粉末トナ
ー像を転写用紙上に転写するに用いられるトナー像転写
ローラ、及びトナー像転写ローラの製造法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner image transfer roller, and more particularly, to a toner image transfer roller used for transferring a powder toner image developed in an electrophotographic apparatus onto a transfer sheet, and a method of manufacturing the toner image transfer roller. About.

【0002】[0002]

【従来の技術】従来の電子写真装置において、感光体上
に形成された電子潜像は粉末トナーによって現像され、
粉末トナー像が得られるが、このトナー像を転写用紙上
に転写するにはコロナ転写方式が主流となっていた。こ
の方式は、トナー像に接する転写用紙の背後からトナー
とは逆極性のコロナ電荷を与えて、転写用紙を感光体に
静電吸着させると同時にトナーを転写用紙上に移動させ
るものであり、装置が簡単であって均一な転写ができる
ために広く採用されている。しかしかかるコロナ転写方
式は、感光体に静電吸着した転写用紙を感光体から分離
するために別途の分離手段が必要であり、またコロナ放
電に伴ってオゾンが発生するので健康上の問題もある。
2. Description of the Related Art In a conventional electrophotographic apparatus, an electronic latent image formed on a photoreceptor is developed by powder toner.
Although a powder toner image is obtained, a corona transfer method has been mainly used for transferring the toner image onto a transfer sheet. In this method, a corona charge having a polarity opposite to that of the toner is applied from the back of the transfer paper in contact with the toner image, and the transfer paper is electrostatically attracted to the photosensitive member and the toner is simultaneously moved onto the transfer paper. Is widely used because it is simple and can perform uniform transfer. However, such a corona transfer method requires a separate separating means to separate the transfer paper electrostatically adsorbed on the photoconductor from the photoconductor, and also has a health problem because ozone is generated by corona discharge. .

【0003】そこで最近は、コロナ転写方式に代わって
ローラ転写方式が多く採用されるようになっている。こ
のローラ転写方式は、図2に示すように、転写用紙8の
背後から弾性を有するローラ4を押し当てることにより
感光体1に転写用紙8を接触させ、同時にトナーと逆極
性の電圧をローラ4に印加して、トナーを転写用紙8上
に転写するものである。この方式はオゾンの発生がな
く、転写用紙の帯電が殆どないために感光体からの分離
が容易であり、転写用紙と感光体との密着が適度である
ので画質もよいという利点がある。
Therefore, recently, a roller transfer method has been widely used in place of the corona transfer method. In this roller transfer method, as shown in FIG. 2, the transfer paper 8 is brought into contact with the photoreceptor 1 by pressing an elastic roller 4 from behind the transfer paper 8, and at the same time, a voltage having a polarity opposite to that of the toner is applied to the roller 4. To transfer the toner onto the transfer paper 8. This method has the advantage that there is no generation of ozone, the transfer paper is hardly charged, the separation from the photoconductor is easy, and the image quality is good because the transfer paper and the photoconductor are in close contact with each other.

【0004】こうしたローラ転写方式に使用されるロー
ラは、弾性層が導電性を有する必要があるため、導電付
与剤としてカーボンブラック等を配合したエチレンプロ
ピレンジエン(EPDM)系ゴムやウレタン系ゴムの発
泡体を、弾性層としたものが多い。しかしローラの表面
が発泡体であると、付着したトナーのクリーニングが不
十分となりやすく、転写用紙の裏汚れが発生するという
問題があるほか、転写用紙のない部分では転写ローラが
感光体に直接に接触するので、発泡体中の配合剤等がロ
ーラの表面にブリードして感光体の表面を汚染したり、
感光体の転写ローラの接触していた跡が画像上に現れる
などの問題があった。
In the roller used in such a roller transfer method, since the elastic layer needs to have conductivity, foaming of ethylene propylene diene (EPDM) rubber or urethane rubber blended with carbon black or the like as a conductivity-imparting agent is required. In many cases, the body is an elastic layer. However, if the surface of the roller is a foam, cleaning of the adhered toner tends to be inadequate, and there is a problem that the transfer paper is stained on the back side. Because of contact, the compounding agent in the foam bleeds on the roller surface and contaminates the photoreceptor surface,
There is a problem that traces of contact of the transfer roller of the photoreceptor appear on the image.

【0005】これに対して上記のような問題の発生を防
止するために、導電付与剤を配合した樹脂材料で形成さ
れた汚れ防止層を、導電性弾性層の上に更に設けた転写
ローラが提案されている。このような転写ローラでは、
弾性層の上に設けた表面樹脂層がずれを起こすと、転写
不良や転写用紙の搬送不良などの原因となるので、表面
層と発泡弾性層とを接着剤によって接着していた。しか
しこの場合、転写ローラの硬度が高くなって転写用紙の
搬送力や転写性能が低下するうえ、接着剤の厚さを均一
に制御しないとローラ表面の平坦性が損なわれたり、或
いは導電性や硬度にばらつきが生じて、画像の品質にも
影響が及ぶという問題があった。
On the other hand, in order to prevent the above-mentioned problem from occurring, a transfer roller further provided with a stain prevention layer formed of a resin material containing a conductivity-imparting agent on a conductive elastic layer has been proposed. Proposed. In such a transfer roller,
If the surface resin layer provided on the elastic layer is displaced, it causes transfer failure or transfer paper transfer failure. Therefore, the surface layer and the foamed elastic layer are bonded with an adhesive. However, in this case, the hardness of the transfer roller is increased, and the transfer force and transfer performance of the transfer paper are reduced. In addition, if the thickness of the adhesive is not uniformly controlled, the flatness of the roller surface is impaired, or the conductivity or There is a problem that the hardness varies, which also affects the image quality.

【0006】[0006]

【発明が解決しようとする課題】そこで本発明は、表面
に樹脂層を設けた弾性転写ローラにおける問題、すなわ
ち低硬度であって平坦性が良く、しかも表面導電性や硬
度等のばらつきがなく、且つ製造工程を簡素化すること
ができる、改良されたトナー像転写ローラの製造法を提
供することを目的とした。
SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a problem with an elastic transfer roller provided with a resin layer on its surface, that is, it has low hardness and good flatness, and has no variation in surface conductivity and hardness. Another object of the present invention is to provide an improved method for manufacturing a toner image transfer roller that can simplify the manufacturing process.

【0007】[0007]

【課題を解決するための手段】本発明のトナー像転写ロ
ーラの製造法は、芯金の外周に導電性ゴム弾性層と導電
性樹脂層とが順次積層してなるトナー像転写ローラを製
造するに当たり、芯金の外周に導電性発泡エチレンプロ
ピレンジエン系ゴム弾性層を形成した弾性ロール体に導
電性塩素化ポリエチレン樹脂チューブを被着したのち、
該ロール体を加熱して該ゴムと該樹脂とを融着させるこ
とを特徴とする。
According to the method of manufacturing a toner image transfer roller of the present invention, a toner image transfer roller in which a conductive rubber elastic layer and a conductive resin layer are sequentially laminated on a core metal is manufactured. In the following, after applying a conductive chlorinated polyethylene resin tube to an elastic roll body having a conductive foamed ethylene propylene diene rubber elastic layer formed on the outer periphery of the core metal,
The roll body is heated to fuse the rubber and the resin.

【0008】また本発明のトナー像転写ローラの製造法
において、前記発泡エチレンプロピレンジエン系ゴム弾
性層は、アスカーC硬度が20〜40度であり且つ平均
気泡径が250μm以下のものであることが好ましく、
体積抵抗率が105 〜1010Ω・cmの材料からなること
が更に好ましい。そして、前記塩素化ポリエチレン樹脂
層は、104 〜1012Ω・cmの材料からなるものである
ことが好ましく、更に前記ロール体の加熱を、100〜
170℃の範囲内で実施するのが好ましい。
In the method for producing a toner image transfer roller of the present invention, the foamed ethylene propylene diene rubber elastic layer may have an Asker C hardness of 20 to 40 degrees and an average bubble diameter of 250 μm or less. Preferably
More preferably, the material has a volume resistivity of 10 5 to 10 10 Ω · cm. The chlorinated polyethylene resin layer is preferably made of a material having a density of 10 4 to 10 12 Ω · cm.
It is preferably carried out in the range of 170 ° C.

【0009】そして本発明の方法によって得られるトナ
ー像転写ローラは、芯金の外周に、平均気泡径が250
μm以下の導電性発泡エチレンプロピレンジエン系ゴム
弾性層と導電性塩素化ポリエチレン樹脂層との直接接合
複合層で、表面のアスカーC硬度が35〜50度である
ものが設けられていることを特徴とするものである。
The toner image transfer roller obtained by the method of the present invention has an average bubble diameter of 250
A direct bonding composite layer of a conductive foamed ethylene propylene diene rubber elastic layer having a thickness of not more than μm and a conductive chlorinated polyethylene resin layer, which is provided with a surface having an Asker C hardness of 35 to 50 degrees. It is assumed that.

【0010】[0010]

【発明の実施の形態】本発明により製造されるトナー像
転写ローラは、図1に示すような構造を有しているもの
である。即ち、41はアルミニウム材或いは鉄材などに
よって形成された芯金であり、その外側に接着剤を塗布
して、エチレンプロピレンジエン系ゴム(EPDM)か
らなる発泡ゴムチューブを嵌着し、芯金41に接着させ
て、発泡ゴム弾性層42を形成した弾性ロール体を得る
ことができる。或いはまた、芯金41を取り付けた円筒
状の成形型に発泡性EPDM組成物を装入し、加硫と同
時に発泡させて発泡ゴム弾性層42を形成することもで
きる。この際の弾性層42は、EPDMに対して導電付
与材として例えばカーボンブラック等を配合し、また例
えばアゾ化合物などの発泡剤を用いて発泡させたものな
どが好ましく、特に平均気泡径が250μm以下で、且
つアスカーC硬度が20〜40度の範囲内にあるものが
よい。かかる発泡ゴム弾性層の体積抵抗率は、105
1010Ω・cmの範囲内にあることが好ましい。
DESCRIPTION OF THE PREFERRED EMBODIMENTS A toner image transfer roller manufactured according to the present invention has a structure as shown in FIG. That is, reference numeral 41 denotes a metal core formed of an aluminum material or an iron material. An adhesive is applied to the outside of the metal core, and a foam rubber tube made of ethylene propylene diene rubber (EPDM) is fitted to the metal core. By bonding, an elastic roll body having the foamed rubber elastic layer 42 formed thereon can be obtained. Alternatively, the foamable EPDM composition can be charged into a cylindrical mold to which the metal core 41 is attached, and foamed simultaneously with vulcanization to form the foamed rubber elastic layer 42. In this case, the elastic layer 42 is preferably formed by blending, for example, carbon black or the like as a conductivity-imparting material with EPDM, and foaming the same using a foaming agent such as an azo compound. And those having Asker C hardness in the range of 20 to 40 degrees are preferable. The volume resistivity of such a foamed rubber elastic layer is 10 5 to
It is preferably within the range of 10 10 Ω · cm.

【0011】このようにして得た弾性ロール体は、所望
の径となるよう必要に応じて外周を研削したのち、塩素
化ポリエチレン樹脂からなるチューブを被着したのち加
熱融着させ、樹脂層43を形成する。ここで用いられる
塩素化ポリエチレン樹脂チューブは、カーボンブラック
等の導電付与材を配合することにより、好ましくは10
4 〜1012Ω・cmの体積抵抗率となるように調整したも
ので、熱収縮性がなくてもよいが、好ましくは熱収縮性
のものである。
[0011] The elastic roll body thus obtained is ground, if necessary, so as to have a desired diameter, and then is coated with a tube made of chlorinated polyethylene resin, and then is heated and fused to form a resin layer 43. To form The chlorinated polyethylene resin tube used here is preferably mixed with a conductivity-imparting material such as carbon black to form a tube.
It is adjusted so as to have a volume resistivity of 4 to 10 12 Ω · cm, and does not need to have heat shrinkability, but is preferably heat shrinkable.

【0012】このように弾性ロール体に被着した塩素化
ポリエチレン樹脂チューブを、加熱により発泡ゴム弾性
層42に対して融着させるが、その際の加熱はできるだ
け均一であることが望ましく、空気循環式の加熱炉を用
いて徐々に昇温することが好ましい。そしてその熱処理
の温度範囲は、100〜170℃の範囲であることが好
ましい。100℃より低いときは密着が十分でなく、ま
た170℃より高過ぎるときは、弾性層2の表面平滑度
や硬度がばらつくなどの欠点が現れるので望ましくな
い。
The chlorinated polyethylene resin tube thus adhered to the elastic roll body is fused to the foamed rubber elastic layer 42 by heating. It is desirable that the heating at that time be as uniform as possible. It is preferable to gradually raise the temperature using a heating furnace of the type. The temperature range of the heat treatment is preferably in the range of 100 to 170C. When the temperature is lower than 100 ° C., the adhesion is not sufficient, and when the temperature is higher than 170 ° C., it is not desirable because defects such as variation in surface smoothness and hardness of the elastic layer 2 appear.

【0013】[0013]

【実施例】【Example】

(第1実施例)径8mmで長さ300mmの鋼製芯金の表面
にウレタン系接着剤を塗布し、これにカーボンブラック
を配合して体積抵抗率を105 〜1010Ω・cmとし、ま
た平均気泡径が150〜250μmの範囲にあってアス
カーC硬度が27度である発泡EPDM系ゴムチューブ
を嵌着し、芯金と接着したのち、その表面を円筒研削盤
によって研削して、外径20mmの弾性ロール体Aを作成
した。また比較のために、体積抵抗率及び硬度が上記と
同様の値を有する、カーボン導電型の発泡性のクロロプ
レンゴム組成物、カーボン導電型の発泡性のシリコーン
ゴム組成物、カーボン導電型の発泡性のシリコーン・エ
チレンプロピレンゴム組成物、及びイオン導電型の発泡
性のウレタンゴム組成物を、それぞれ上記と同じ形状寸
法の、それぞれ接着剤を塗付した鋼製芯金を取り付けた
成形型内に入れて、発泡成形し、更に表面を円筒研削盤
によって研削して、外径20mmの弾性ロール体B〜Eを
作成した。
(First Embodiment) A urethane-based adhesive was applied to the surface of a steel cored bar having a diameter of 8 mm and a length of 300 mm, and carbon black was added thereto to adjust the volume resistivity to 10 5 to 10 10 Ω · cm. Further, a foamed EPDM rubber tube having an average bubble diameter in the range of 150 to 250 μm and an Asker C hardness of 27 degrees is fitted and bonded to a cored bar, and the surface thereof is ground by a cylindrical grinder. An elastic roll body A having a diameter of 20 mm was prepared. For comparison, a carbon conductive foamable chloroprene rubber composition, a carbon conductive foamable silicone rubber composition, and a carbon conductive foamable foam having the same values of volume resistivity and hardness as described above. The silicone-ethylene propylene rubber composition and the ionic conductive foamable urethane rubber composition are placed in a mold having the same shape and dimensions as described above and a steel cored bar with an adhesive applied thereto. Then, foaming was performed, and the surface was further ground by a cylindrical grinder, thereby producing elastic rolls B to E having an outer diameter of 20 mm.

【0014】次に、径22mm、膜厚0.2〜0.3mmで
熱収縮性のカーボン導電型塩素化ポリエチレン樹脂チュ
ーブa(住友電気工業製、スミチューブG)、内径1
9.5mm、膜厚0.1mmで非収縮性のカーボン導電型ウ
レタン樹脂チューブb(大倉工業製)、内径19.5m
m、膜厚0.05mmで非収縮性のカーボン導電型PFA
樹脂チューブc(グンゼ製)、内径19.5mm、膜厚
0.05mmで非収縮性のイオン導電型PVDF樹脂チュ
ーブd(大倉工業製)を用意した。そして前記の弾性ロ
ール体に接着剤を塗付することなくこれらの樹脂チュー
ブを被着し、空気循環式加熱炉中に入れて130℃の雰
囲気下で、30分間保持して樹脂チューブを融着させ
た。
Next, a heat-shrinkable carbon conductive chlorinated polyethylene resin tube a having a diameter of 22 mm and a film thickness of 0.2 to 0.3 mm (Sumitube G, manufactured by Sumitomo Electric Industries, Ltd.)
9.5 mm, 0.1 mm thick, non-shrinkable carbon conductive urethane resin tube b (manufactured by Okura Industries), 19.5 m inside diameter
m, non-shrinkable carbon conductive PFA with a thickness of 0.05 mm
A resin tube c (manufactured by Gunze), an inner diameter of 19.5 mm, a film thickness of 0.05 mm, and a non-shrinkable ion-conductive PVDF resin tube d (manufactured by Okura Industries) were prepared. Then, these resin tubes are adhered to the elastic roll body without applying an adhesive, placed in an air-circulating heating furnace, and kept at 130 ° C. for 30 minutes to fuse the resin tubes. I let it.

【0015】こうして得たそれぞれの転写ローラの樹脂
層に、軸に平行に幅10mm間隔に2本の切れ目を入れ、
弾性層と樹脂層との90°剥離試験を行って、密着性を
以下の基準に従って評価し、その結果を表1に示した。 ○:剥離の際に弾性層が破壊して、樹脂層に付いてく
る。 △:剥離の際に接着部分が破壊し、弾性層は樹脂層に付
いてこない。 ×:弾性層と樹脂層とは接しているだけで、容易に剥離
する。
In the resin layer of each transfer roller thus obtained, two cuts are made at intervals of 10 mm in parallel to the axis.
A 90 ° peel test was performed between the elastic layer and the resin layer, and the adhesion was evaluated according to the following criteria. The results are shown in Table 1. :: The elastic layer is broken at the time of peeling, and adheres to the resin layer. Δ: The adhesive portion was broken at the time of peeling, and the elastic layer did not adhere to the resin layer. X: The elastic layer and the resin layer are easily in contact with each other but easily peeled off.

【0016】[0016]

【表1】 [Table 1]

【0017】この結果を見ると、発泡EPDM系ゴムに
対する塩素化ポリエチレン樹脂の組み合わせが、特に優
れた熱融着状態を与えるが、その他の組み合わせでは、
いずれも密着性が不十分であることがわかる。
According to the results, the combination of the chlorinated polyethylene resin with the foamed EPDM rubber gives a particularly excellent heat-sealing state.
It can be seen that in all cases, the adhesion is insufficient.

【0018】(第2実施例)平均気泡径が150〜25
0μmの範囲にある導電性発泡EPDM系ゴムを用い
て、アスカーC硬度が27度の弾性層を有する弾性ロー
ル体Fを作成した。そして、これに塩素化ポリエチレン
樹脂チューブaを被着したのち、表面のアスカーC硬度
を測定した。更に種々の熱処理温度の空気循環式加熱炉
中で30分間保持する方法で、それぞれ転写ローラを製
造した。そして表面の樹脂層を取り除いた後アスカーC
硬度を測定し、その結果を表2に示した。
(Second Embodiment) Average bubble diameter is 150 to 25
An elastic roll body F having an elastic layer with an Asker C hardness of 27 degrees was prepared using a conductive foamed EPDM rubber in the range of 0 μm. Then, after attaching a chlorinated polyethylene resin tube a to this, the Asker C hardness of the surface was measured. Further, transfer rollers were manufactured by a method in which the rollers were kept in an air circulation heating furnace at various heat treatment temperatures for 30 minutes. After removing the surface resin layer, Asker C
The hardness was measured, and the results are shown in Table 2.

【0019】更にこれらの転写ローラについて、表面粗
さ計(東京精密製、サーフコム570A)を用いてロー
ラ表面の最大うねり(WCM,μm)を測定して、平坦
性の評価をすると共に、実施例1と同様の測定方法で密
着性を評価した結果を、表2に併せて示した。
Further, with respect to these transfer rollers, the maximum waviness (WCM, μm) of the roller surface was measured using a surface roughness meter (Surfcom 570A, manufactured by Tokyo Seimitsu Co., Ltd.), and the flatness was evaluated. Table 2 also shows the results of evaluating the adhesion by the same measurement method as in Example 1.

【0020】[0020]

【表2】 [Table 2]

【0021】表2の結果を見ると、発泡EPDM系ゴム
チューブを用いた弾性ロール体に塩素化ポリエチレン樹
脂チューブを融着させるとき、熱処理温度を100〜1
70℃の範囲内とすると、アスカーC硬度、平坦性、及
び密着性のいずれについても良好な性状を有する転写ロ
ーラが得られることがわかる。
According to the results shown in Table 2, when the chlorinated polyethylene resin tube is fused to the elastic roll using the foamed EPDM rubber tube, the heat treatment temperature is set to 100 to 1.
It can be seen that when the temperature is in the range of 70 ° C., a transfer roller having good properties in all of Asker C hardness, flatness, and adhesion can be obtained.

【0022】(第3実施例)発泡EPDM系ゴムとし
て、平均気泡径が150〜250μmの範囲にある、前
記と同様な導電性の発泡EPDM系ゴムチューブを用い
て、アスカーC硬度が20度、又は40度である弾性層
を有する弾性ロール体G、及びHを作成した。そしてこ
れらの弾性ロール体に対して、それぞれ塩素化ポリエチ
レン樹脂チューブaを被着したのち、実施例2と同様な
方法により、種々の熱処理温度でそれぞれの転写ローラ
を製造した。こうして得たそれぞれの転写ローラについ
てアスカーC硬度を測定し、硬度の変化を調べた結果を
表3に示した。
(Third Embodiment) As a foamed EPDM rubber, a conductive foamed EPDM rubber tube having an average cell diameter in the range of 150 to 250 μm and similar to the above is used. Alternatively, elastic rolls G and H having an elastic layer at 40 degrees were prepared. Then, a chlorinated polyethylene resin tube a was applied to each of these elastic rolls, and then each transfer roller was manufactured at various heat treatment temperatures in the same manner as in Example 2. Table 3 shows the results obtained by measuring Asker C hardness for each of the transfer rollers thus obtained and examining the change in hardness.

【0023】[0023]

【表3】 [Table 3]

【0024】表3の結果を表2の結果と併せて見ると、
アスカーC硬度が20度乃至40度である発泡EPDM
系ゴムチューブを用いた弾性ロール体に、熱処理温度が
100〜170℃の範囲において塩素化ポリエチレン樹
脂チューブを融着させると、アスカーC硬度が35〜5
0度の範囲内という、好適な範囲の表面硬度を有する転
写ローラが得られることがわかる。
Looking at the results in Table 3 together with the results in Table 2,
Foamed EPDM having Asker C hardness of 20 to 40 degrees
When a chlorinated polyethylene resin tube is fused to an elastic roll body using a system rubber tube at a heat treatment temperature of 100 to 170 ° C., Asker C hardness is 35 to 5
It can be seen that a transfer roller having a surface hardness in a preferable range of 0 degree can be obtained.

【0025】(第4実施例)更に、発泡EPDM系ゴム
として、アスカーC硬度が30度であり、平均気泡径が
それぞれ80〜150μm、150〜250μm、又は
250〜350μmと異なる他は前記と同様な、導電性
の発泡EPDM系ゴムチューブを用いて弾性層を作成し
た弾性ロール体I、J、及びKに対して、それぞれ塩素
化ポリエチレン樹脂チューブaを被着し、熱処理温度を
種々に変えて30分間処理して融着させ、それぞれ転写
ローラを製造した。これらの転写ローラの表面の平坦性
を、実施例2と同様な測定法により評価した結果を、表
4に示した。
(Fourth Embodiment) Further, as the foamed EPDM rubber, the Asker C hardness is 30 degrees and the average cell diameter is different from 80 to 150 μm, 150 to 250 μm, or 250 to 350 μm, respectively. A chlorinated polyethylene resin tube a is applied to each of the elastic rolls I, J, and K in which an elastic layer is formed using a conductive foamed EPDM rubber tube, and the heat treatment temperature is variously changed. The treatment was performed for 30 minutes to fuse, and a transfer roller was manufactured. Table 4 shows the results of evaluating the flatness of the surface of these transfer rollers by the same measurement method as in Example 2.

【0026】[0026]

【表4】 [Table 4]

【0027】表4の結果を見ると、平均気泡径が150
〜250μm以下である発泡EPDM系ゴムチューブを
用いた弾性ロール体は、熱処理温度が100〜170℃
の範囲において塩素化ポリエチレン樹脂チューブを融着
させた場合、ローラ表面のうねりが少なくて平坦性の良
好な転写ローラが得られることがわかる。
Looking at the results in Table 4, the average bubble diameter is 150
An elastic roll body using a foamed EPDM rubber tube having a diameter of not more than 250 μm has a heat treatment temperature of 100 to 170 ° C.
It can be seen that when the chlorinated polyethylene resin tube is fused in the range of, a transfer roller having good flatness with little undulation on the roller surface can be obtained.

【0028】[0028]

【発明の効果】本発明のトナー像転写ローラの製造法に
よれば、弾性層として発泡EPDM系ゴムを用い、且つ
塩素化ポリエチレン樹脂層を熱融着するので、接着剤を
用いなくて密着性が良く、しかも感光体との間にニップ
を形成するに適した硬度を有していて平坦性が良好な転
写ローラを、簡素化された製造工程により、品質上のば
らつきがなく高い生産性で製造することができ、経済的
である、という効果がある。
According to the method of manufacturing the toner image transfer roller of the present invention, since the foamed EPDM rubber is used as the elastic layer and the chlorinated polyethylene resin layer is heat-sealed, the adhesiveness is reduced without using an adhesive. The transfer roller has good hardness, is suitable for forming a nip with the photoreceptor, and has good flatness. By a simplified manufacturing process, there is no variation in quality and high productivity. It can be manufactured and is economical.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の製造法によって得られるトナー像転写
ローラの構造を示す、縦断面図である。
FIG. 1 is a longitudinal sectional view showing a structure of a toner image transfer roller obtained by a manufacturing method of the present invention.

【図2】トナー像転写ローラを組み込んだ電子写真装置
の構造を示す概念図である。
FIG. 2 is a conceptual diagram illustrating a structure of an electrophotographic apparatus incorporating a toner image transfer roller.

【符号の説明】[Explanation of symbols]

1 感光体 2 現像ローラ 3 トナー供給ローラ 4 転写ローラ 41 芯金 42 弾性層 43 樹脂層 5 帯電ローラ 6 クリーニングローラ 7 露光装置 8 転写用紙 DESCRIPTION OF SYMBOLS 1 Photoconductor 2 Developing roller 3 Toner supply roller 4 Transfer roller 41 Metal core 42 Elastic layer 43 Resin layer 5 Charging roller 6 Cleaning roller 7 Exposure device 8 Transfer paper

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 芯金の外周に導電性ゴム弾性層と導電性
樹脂層とが順次積層してなるトナー像転写ローラを製造
するに当たり、芯金の外周に導電性発泡エチレンプロピ
レンジエン系ゴム弾性層を形成した弾性ロール体に導電
性塩素化ポリエチレン樹脂チューブを被着したのち、該
ロール体を加熱して該ゴムと該樹脂とを融着させること
を特徴とする、トナー像転写ローラの製造法。
In producing a toner image transfer roller in which a conductive rubber elastic layer and a conductive resin layer are sequentially laminated on the outer periphery of a core, a conductive foamed ethylene propylene diene rubber elastic is formed on the outer periphery of the core. Manufacturing a toner image transfer roller, comprising: applying a conductive chlorinated polyethylene resin tube to an elastic roll body having a layer formed thereon; and heating the roll body to fuse the rubber and the resin. Law.
【請求項2】 前記ロール体の加熱を、100〜170
℃の範囲内で実施する、請求項1に記載のトナー像転写
ローラの製造法。
2. The method according to claim 1, wherein the heating of the roll body is performed at 100 to 170.
The method for producing a toner image transfer roller according to claim 1, wherein the method is carried out within a temperature range of ° C.
【請求項3】 前記発泡エチレンプロピレンジエン系ゴ
ム弾性層は、アスカーC硬度が20〜40度であり且つ
平均気泡径が250μm以下のものである、請求項1ま
たは2に記載のトナー像転写ローラの製造法。
3. The toner image transfer roller according to claim 1, wherein the foamed ethylene propylene diene rubber elastic layer has an Asker C hardness of 20 to 40 degrees and an average bubble diameter of 250 μm or less. Manufacturing method.
【請求項4】 前記発泡エチレンプロピレンジエン系ゴ
ム弾性層は、体積抵抗率が105 〜1010Ω・cmの材料
からなり、前記塩素化ポリエチレン樹脂層は、104
1012Ω・cmの材料からなるものである、請求項1乃至
3のいずれかに記載のトナー像転写ローラの製造法。
4. The foamed ethylene propylene diene rubber elastic layer is made of a material having a volume resistivity of 10 5 to 10 10 Ω · cm, and the chlorinated polyethylene resin layer is made of a material having a volume resistivity of 10 4 to 10 4 Ω · cm.
4. The method for producing a toner image transfer roller according to claim 1, wherein the roller is made of a material of 10 12 Ω · cm.
【請求項5】 芯金の外周に、平均気泡径が250μm
以下の導電性発泡エチレンプロピレンジエン系ゴム弾性
層と導電性塩素化ポリエチレン樹脂層との直接接合複合
層で、表面のアスカーC硬度が35〜50度であるもの
が設けられていることを特徴とする、トナー像転写ロー
ラ。
5. An average cell diameter of 250 μm around the core metal.
A direct bonding composite layer of the following conductive foamed ethylene propylene diene rubber elastic layer and a conductive chlorinated polyethylene resin layer, wherein the surface has an Asker C hardness of 35 to 50 degrees, which is characterized by being provided. Toner image transfer roller.
JP3183997A 1997-02-17 1997-02-17 Production of toner image transfer roll and toner image transfer roll Pending JPH10228187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3183997A JPH10228187A (en) 1997-02-17 1997-02-17 Production of toner image transfer roll and toner image transfer roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3183997A JPH10228187A (en) 1997-02-17 1997-02-17 Production of toner image transfer roll and toner image transfer roll

Publications (1)

Publication Number Publication Date
JPH10228187A true JPH10228187A (en) 1998-08-25

Family

ID=12342234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3183997A Pending JPH10228187A (en) 1997-02-17 1997-02-17 Production of toner image transfer roll and toner image transfer roll

Country Status (1)

Country Link
JP (1) JPH10228187A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6219518B1 (en) 1998-10-30 2001-04-17 Ricoh Company, Ltd. Image forming apparatus including an intermediate image transfer body
KR100450909B1 (en) * 2002-11-27 2004-10-01 자화전자 주식회사 Manufacture process of primary charge roller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6219518B1 (en) 1998-10-30 2001-04-17 Ricoh Company, Ltd. Image forming apparatus including an intermediate image transfer body
KR100450909B1 (en) * 2002-11-27 2004-10-01 자화전자 주식회사 Manufacture process of primary charge roller

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