JPH0572889A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH0572889A JPH0572889A JP3263105A JP26310591A JPH0572889A JP H0572889 A JPH0572889 A JP H0572889A JP 3263105 A JP3263105 A JP 3263105A JP 26310591 A JP26310591 A JP 26310591A JP H0572889 A JPH0572889 A JP H0572889A
- Authority
- JP
- Japan
- Prior art keywords
- continuous phase
- rubber
- discontinuous phase
- toner
- phase
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0818—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the structure of the donor member, e.g. surface properties
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Photoreceptors In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転駆動される現像剤
担持体に、一成分系現像剤を供給し該現像剤担持体の表
面に前記現像剤を担持して搬送し、潜像担持体と前記現
像剤担持体が互いに対向した現像領域にて、該潜像担持
体に形成された静電潜像を現像剤担持体に担持された前
記現像剤によって可視像化する静電潜像現像装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies a one-component developer to a developer carrier which is rotationally driven, carries the developer on the surface of the developer carrier, and conveys the latent image carrier. Electrostatic latent image that visualizes the electrostatic latent image formed on the latent image bearing member by the developer carried on the developer bearing member in the developing area where the body and the developer bearing member face each other. The present invention relates to an image developing device.
【０００２】[0002]
【従来の技術】潜像担持体に静電潜像を形成し、これを
現像剤によって可視像化して記録画像を得る電子複写
機、プリンター或いはファクシミリ等の画像形成装置で
は、粉体状の現像剤を用いる乾式の現像装置が広く採用
されている。かかる粉体状の現像剤としては、トナーと
キャリアを有する二成分系現像剤と、キャリアを含まな
い一成分系現像剤とが公知であり、前者の二成分系現像
剤を用いた二成分現像方式は、比較的安定した良好な記
録画像が得られる反面、キャリアの劣化やトナーとキャ
リアの混合比の変動が発生しやすく、装置の維持管理が
煩雑で、装置全体の構造が大型化しやすくなる欠点を有
している。このような観点から、上述の欠点を有しない
一成分系現像剤を用いた一成分系現像方式が注目されて
いる。一成分系現像剤は、トナーのみから成るものと、
これに必要に応じて補助剤を外添した、トナーと補助剤
を混合したものがある。またトナーとしては、その各ト
ナー粒子自体に磁性粉を練り込んだ磁性トナーと、磁性
体を含まない非磁性トナーとがある。ここで、磁性体は
一般に不透明であるため、フルカラーやマルチカラーを
含めたカラー画像を磁性トナーによって形成すると、現
像された可視像が不鮮明と成り、鮮やかなカラー画像を
得ることはできない。従って、特にカラー現像に対して
は、非磁性トナーを用いた一成分現像方式を採用するこ
とが望ましい。2. Description of the Related Art In an image forming apparatus such as an electronic copying machine, a printer or a facsimile, which forms an electrostatic latent image on a latent image carrier and visualizes it with a developer to obtain a recorded image, a powdery material is used. A dry type developing device using a developer is widely adopted. As the powdery developer, a two-component developer containing a toner and a carrier and a one-component developer containing no carrier are known, and the former two-component developer using the two-component developer is known. The method can obtain a relatively stable and good recorded image, but on the other hand, deterioration of the carrier and variation of the mixing ratio of the toner and the carrier are likely to occur, maintenance of the apparatus is complicated, and the structure of the entire apparatus tends to be large. It has drawbacks. From such a viewpoint, a one-component developing method using a one-component developer which does not have the above-mentioned drawbacks has been receiving attention. The one-component developer consists of toner only,
There is a mixture of a toner and an auxiliary agent in which an auxiliary agent is externally added as necessary. As the toner, there are a magnetic toner in which magnetic powder is kneaded into each toner particle itself, and a non-magnetic toner containing no magnetic substance. Here, since the magnetic substance is generally opaque, when a color image including full color and multi-color is formed with magnetic toner, the developed visible image becomes unclear, and a vivid color image cannot be obtained. Therefore, especially for color development, it is desirable to adopt the one-component development method using non-magnetic toner.
【０００３】[0003]
【発明が解決しようとする課題】かかる非磁性一成分系
現像装置に要求される機能としては、例えば 所望の現像特性を得る電気特性 トナー帯電性（現像ローラ上トナーの帯電量、付着
量） トナーフィルミング性 耐摩耗性 低トルク（摩擦係数）性 体環境性、経時安定性 等があげられる。単一の材料を用いた単層の現像剤担持
体を用いた現像装置ではこれらの機能を充分に満足させ
ることは難しく、従来各機能を分離した複層構成の現像
剤担持体を装着した現像装置が用いられていた。しか
し、この複数構成の現像剤担持体を装着した現像装置は
製造工程が非常に多くなりコストもかかるため、低コス
トで多機能の現像剤担持体が望まれていた。The functions required of such a non-magnetic one-component developing device include, for example, electrical characteristics for obtaining desired developing characteristics, toner chargeability (charge amount of toner on developing roller, adhesion amount) toner Filming property Abrasion resistance Low torque (friction coefficient) property Physical environment, stability over time, etc. It is difficult to sufficiently satisfy these functions with a developing device that uses a single-layer developer carrier using a single material. Conventionally, development using a developer carrier with a multi-layer structure in which each function is separated The device was being used. However, since the developing device equipped with the plurality of developer carrying members has a large number of manufacturing steps and is costly, a low cost and multifunctional developer carrying member has been desired.
【０００４】[0004]
【課題を解決するための手段】本発明者等は、鋭意検討
した結果、特定な現像剤担持体を装着した現像装置が上
記目的に適合することを知見した。すなわち、本発明に
よれば、薄層形成部材により非磁性１成分トナーの薄層
を表面に形成した現像剤担持体によって静電潜像を現像
する装置において、前記現像剤但持体の少なくとも表面
が、異なる２種以上の不定形ポリマーをブレンドした後
成型することにより連続相（海部）と不連続相（島部）
を有することを特徴とする静電潜像の現像装置が提供さ
れる。As a result of intensive studies, the present inventors have found that a developing device equipped with a specific developer carrying member meets the above-mentioned object. That is, according to the present invention, in a device for developing an electrostatic latent image by a developer carrier having a thin layer of non-magnetic one-component toner formed on the surface by a thin layer forming member, at least the surface of the developer carrier However, the continuous phase (sea part) and the discontinuous phase (island part) can be obtained by molding after blending two or more different types of amorphous polymers.
An electrostatic latent image developing device is provided.
【０００５】本発明の現像装置は、前記構成からなり、
表面に複数のポリマーが露出した現像剤担持体を用いた
ことから、それらが種々の特性を補完しあうのでバラン
スのとれたローラ特性が得られる。しかも該現像剤担持
体は簡便に作成できるので低コスト化が可能になる。The developing device of the present invention has the above-mentioned structure,
Since a developer carrier having a plurality of exposed polymers is used on the surface of the developer carrier, they complement each other to obtain well-balanced roller properties. Moreover, since the developer carrying member can be easily prepared, the cost can be reduced.
【０００６】以下、かかる現像装置について説明する。
図１に本発明の代表的な現像装置の現像剤担持体部を中
心とした概要を示す。図１において、トナータンク７０
に内蔵されているトナー６０は、撹拌羽根（トナー供給
補助部材）５０によりトナー供給部材（スポンジロー
ラ）４０に強制的に寄せられ、トナー６０はトナー供給
部材４０に供給される。一方、現像を終了した現像剤担
持体（現像ローラ）２０は、矢印の方向に回転（たとえ
ば４００ｒｐｍ）し、トナー供給部材４０との接触部に
至る。トナー供給部材４０は現像剤担持体２０と逆方向
に回転（例えば３００ｒｐｍ）し、現像剤担持体２０と
トナー６０に帯電を与え、現像剤担持体２０上にトナー
６０を付着させる。更に現像剤担持体２０は回転し、現
像剤担持体２０上の付着トナーは、トナー層厚規制部材
（弾性ブレード）３０により、厚みを規制されながら帯
電も安定化され、現像域８０に達する。現像域８０にお
いて、接触又は非接触現像により、潜像が現像される。
ここで必要に応じて、現像剤担持体２０、トナー供給部
材４０に直流、交流、直流重量交流、パルスなどのバイ
アスなどを印加して、最適な画像を制御することができ
る。The developing device will be described below.
FIG. 1 shows an outline centering on a developer carrier portion of a typical developing device of the present invention. In FIG. 1, the toner tank 70
The toner 60 contained in the toner is forced to the toner supply member (sponge roller) 40 by the stirring blade (toner supply auxiliary member) 50, and the toner 60 is supplied to the toner supply member 40. On the other hand, the developer carrying member (developing roller) 20 that has completed development rotates in the direction of the arrow (for example, 400 rpm) and reaches the contact portion with the toner supply member 40. The toner supply member 40 rotates in the opposite direction to the developer carrying member 20 (for example, 300 rpm), charges the developer carrying member 20 and the toner 60, and attaches the toner 60 onto the developer carrying member 20. Further, the developer carrying member 20 rotates, and the toner adhered on the developer carrying member 20 is stabilized by the toner layer thickness regulating member (elastic blade) 30 while its charge is stabilized and reaches the developing area 80. In the development area 80, the latent image is developed by contact or non-contact development.
Here, a bias such as direct current, alternating current, direct current weight alternating current, or pulse may be applied to the developer carrying member 20 and the toner supply member 40 as needed to control an optimum image.
【０００７】次に、本発明の現像剤担持体について説明
する。本発明の現像剤担持体は、前記したように、異な
る２種以上の不定形ポリマーをブレンド後、成形するこ
とにより、連続相（海部）と不連続相（島部）とからな
る海島構造となっている。ここで不定形ポリマーと表現
されるものは、少なくとも成形時の熱や圧力により不定
形すなわち流動が可能であり、他のポリマーとの親和
性、相溶性の差により、成形後連続相や不連続相の形態
をとりうるものであり、一般的にポリマーアロイと称さ
れるものに分類される。従って、熱硬化後の粒子を連続
相材料中に分散して成型したり、熱可塑性の粒子を連続
相材料中に分散して粒子の溶融温度以下で成型したりす
る方法はこの範疇には入らない。本発明で用いる現像剤
担持体は、このように事前に粒子を作製したり、それを
他材料にコンパウンディングしたりすることないので、
担持体表面に連続相と不連続相からなる不均一構造を低
コストで設けることが可能で、種種の材料の組合せによ
り現像剤担持体の多機能化を図ることができる。Next, the developer carrier of the present invention will be described. As described above, the developer carrying member of the present invention has a sea-island structure composed of a continuous phase (sea part) and a discontinuous phase (island part) by molding two or more different amorphous polymers after blending. Has become. What is referred to as an amorphous polymer here is that it is capable of indefinite shape or flow due to at least the heat and pressure during molding, and due to the difference in its affinity and compatibility with other polymers, it may have a continuous phase or discontinuity after molding. It can take the form of a phase and is generally classified into what is called a polymer alloy. Therefore, a method of dispersing particles after thermosetting in a continuous phase material for molding, or a method of dispersing thermoplastic particles in a continuous phase material and molding at a temperature below the melting temperature of the particles is not included in this category. Absent. Since the developer carrier used in the present invention does not prepare particles in advance or compound it with other materials,
A heterogeneous structure composed of a continuous phase and a discontinuous phase can be provided on the surface of the carrier at low cost, and the developer carrier can be made multifunctional by combining various kinds of materials.
【０００８】本発明の現像剤担持体の最も代表的な例を
図２に示す。不連続相は島部として海部の連続相中に独
立して存在している。不連続相の表面占有面積や径など
で現像剤担持体の特性を調性することが可能である。不
連続相の表面占有面積は不連続相のポリマーと連続相の
ポリマーの比率により調製が可能で、不連続相ポリマー
／連続相ポリマー＝１０／９０〜９０／１０（容積比）
の範囲が好ましい。この範囲を超えると各々のポリマー
の特性が発現しにくい。不連続相の径（平均）は１μｍ
〜５００μｍが好ましい。１μｍ未満だと不連続相とし
ての特性が得られにくく、５００μｍを超えると連続相
と不連続相の相溶性の問題から、現像剤担持体の強度が
低下したり、表面のキズ、ヒビ、ワレなどの原因とな
る。The most typical example of the developer carrying member of the present invention is shown in FIG. The discontinuous phase exists independently as an island in the continuous phase of the sea. It is possible to adjust the characteristics of the developer bearing member by the surface occupying area and diameter of the discontinuous phase. The surface occupation area of the discontinuous phase can be adjusted by the ratio of the discontinuous phase polymer and the continuous phase polymer, and the discontinuous phase polymer / continuous phase polymer = 10/90 to 90/10 (volume ratio)
Is preferred. When it exceeds this range, the properties of each polymer are not easily expressed. Diameter of discontinuous phase (average) is 1 μm
˜500 μm is preferred. If it is less than 1 μm, it is difficult to obtain the characteristics as a discontinuous phase, and if it exceeds 500 μm, the strength of the developer carrier decreases due to the compatibility problem of the continuous phase and the discontinuous phase, and the surface has scratches, cracks, and cracks. It causes such as.
【０００９】本発明で用いる現像剤担持体を構成するた
めのポリマー類は、樹脂材料（プラストマー）とゴム材
料（エラストマー）があり、その具体例としては以下の
ものが挙げられる。ポリ塩化ビニル、ポリビニルブチラ
ール、ポリビニルアルコール、ポリ塩化ビニリデン、ポ
リ酢酸ビニル、ポリビニルホルマール、などのビニル系
樹脂；ポリスチレン、スチレン−ホアクリロニトリル共
重合体、アクリロニトリル−ブタジエン−スチレン共重
合体などのポリスチレン系樹脂；ポリエチレン、エチレ
ン−酢酸ビニル共重合体などのポリエチレン系樹脂；ポ
リメチルメタクリレート、ポリメチルメタクリレート−
スチレン共重合体などのアクリル系樹脂；ポリアセター
ル、ポリアミド、セルロース、ポリカーボネート、フェ
ノキシ樹脂、ポリエステル、フッ素樹脂、ポリウレタ
ン、フェノール樹脂、尿素樹脂、メラミン樹脂、エポキ
シ樹脂、不飽和ポリエステル樹脂、シリコーン樹脂等の
樹脂材料；天然ゴム、イソプレンゴム、ブタジエンゴ
ム、スチレン−ブタジエンゴム、ブチルゴム、エチレン
−プロピレンゴム、クロロプレンゴム、塩素化ポリエチ
レンゴム、エピクロルヒドリンゴム、ニトリルゴム、ア
クリルゴム、ウレタンゴム、多硫化ゴム、シリコーンゴ
ム、フッ素ゴム、シリコーン変性エチレン−プロピレン
ゴムなどのゴム材料などが挙げられる。The polymers for forming the developer carrying member used in the present invention include a resin material (plastomer) and a rubber material (elastomer), and specific examples thereof include the following. Vinyl-based resins such as polyvinyl chloride, polyvinyl butyral, polyvinyl alcohol, polyvinylidene chloride, polyvinyl acetate, polyvinyl formal; polystyrene-based resins such as polystyrene, styrene-foacrylonitrile copolymer, acrylonitrile-butadiene-styrene copolymer, etc. Polyethylene-based resins such as polyethylene and ethylene-vinyl acetate copolymers; polymethyl methacrylate, polymethyl methacrylate-
Acrylic resins such as styrene copolymers; resins such as polyacetal, polyamide, cellulose, polycarbonate, phenoxy resin, polyester, fluororesin, polyurethane, phenol resin, urea resin, melamine resin, epoxy resin, unsaturated polyester resin, silicone resin Materials: Natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, ethylene-propylene rubber, chloroprene rubber, chlorinated polyethylene rubber, epichlorohydrin rubber, nitrile rubber, acrylic rubber, urethane rubber, polysulfide rubber, silicone rubber, Examples thereof include rubber materials such as fluororubber and silicone-modified ethylene-propylene rubber.
【００１０】現像剤担持体を作成するには、これらの材
料を２種、若しくは必要に応じて複数種組み合わせて用
いるが、連続相と不連続相の形態（不連続相の大きさや
相間接着性）は相溶性の差により支配されることから、
用いるポリマーの溶解度パラメーター（ＳＰ値）の差は
０．２から２．５にあることが好ましい。ＳＰ値の差が
０．２以下だと相溶性がよすぎて不連続相の径が小さ
く、不連続ポリマーの特性が得られにくくなる。またＳ
Ｐ値の差が２．５以上だと相間接着性が不充分となり、
使用時のヒビ、ワレ、キズなどが生じる。In order to prepare a developer carrying member, these materials are used in combination of two kinds or, if necessary, a plurality of kinds, and the form of continuous phase and discontinuous phase (size of discontinuous phase and interphase adhesiveness) ) Is dominated by the difference in compatibility,
The difference in solubility parameter (SP value) of the polymers used is preferably 0.2 to 2.5. When the difference in SP value is 0.2 or less, the compatibility is so good that the diameter of the discontinuous phase is small and it becomes difficult to obtain the characteristics of the discontinuous polymer. Also S
If the difference in P value is 2.5 or more, the interphase adhesiveness becomes insufficient,
Cracks, cracks, and scratches may occur during use.
【００１１】また、本発明で用いる現像剤担持体には、
連続相と不連続相の相溶性を改善するために、相溶化剤
を添加することも可能である。相溶化剤はランダム、グ
ラフト、ブロックコーポリマー等の種類があり、用いる
ポリマーに応じて適宜選択することができる。市販品と
しては「レゼダ」東亜合成、「モディパー」日本油脂、
等が上市されている。The developer carrier used in the present invention includes
It is also possible to add compatibilizers in order to improve the compatibility of the continuous and discontinuous phases. There are various types of compatibilizers such as random, graft and block copolymers, and they can be appropriately selected according to the polymer used. As commercial products, "Reseda" Toa Gosei, "Modiper" Nippon Oil and Fat,
Etc. are on the market.
【００１２】連続相ポリマーと不連続相ポリマーの組合
せの例を挙げると、ポリメチルメタクリレートに対し
て、ポリ酢酸ビニル、塩素化ポリエチレン、ポリ塩化ビ
ニル、ポリフッ化ビニリデン、ポリスチレン−アクリロ
ニトリル等が、ポリ酢酸ビニルに対して、ポリエチレン
オキサイド、アクリロニトリル−ブタジエンゴム、ポリ
メチルアクリレート、ポリブチレンテレフタレート、エ
チレン−酢酸ビニル共重合体等が、ポリスチレンに対し
て、ポリブタジエン、ポリイソプレン、スチレン−ブタ
ジエンゴム、スチレン−アクリロニトリル共重合体、ポ
リジメチルフェニレンオキサイド、ポリメチルフェニル
シロキサン等が、ポリウレタンに対しては、エチレン−
酢酸ビニル共重合体、塩化ビニル−酢酸ビニル共重合体
等が、スチレン−ブタジエンゴムに対しては、天然ゴ
ム、、ブタジエンゴム、クロロプレンゴム等が、シリコ
ーンゴムに対しては、エチレン−プロピレン−ジエン−
メチレンゴム、フッソゴム、アクリルゴム、ブチルゴム
等が挙げられるが、これらに限定されるものではない。As an example of a combination of a continuous phase polymer and a discontinuous phase polymer, polyvinyl acetate, chlorinated polyethylene, polyvinyl chloride, polyvinylidene fluoride, polystyrene-acrylonitrile and the like can be used as polyacetic acid with respect to polymethyl methacrylate. For vinyl, polyethylene oxide, acrylonitrile-butadiene rubber, polymethyl acrylate, polybutylene terephthalate, ethylene-vinyl acetate copolymer, etc., for polystyrene, polybutadiene, polyisoprene, styrene-butadiene rubber, styrene-acrylonitrile copolymer Polymers, polydimethylphenylene oxide, polymethylphenyl siloxane, etc.
Vinyl acetate copolymers, vinyl chloride-vinyl acetate copolymers, etc., natural rubber, butadiene rubber, chloroprene rubber, etc. for styrene-butadiene rubber, ethylene-propylene-diene, for silicone rubber. −
Examples thereof include, but are not limited to, methylene rubber, fluorine rubber, acrylic rubber, butyl rubber, and the like.
【００１３】本発明で用いる現像剤担持体は、連続相及
び不連続相のどちらか一方が１０13Ω・ｃｍ以上の絶縁
性であることが好ましい。両方とも導電性の場合、対ト
ナー帯電性が低下し所望のトナー帯電量、トナー付着量
が得にくい。In the developer carrier used in the present invention, it is preferable that either the continuous phase or the discontinuous phase has an insulating property of 10 13 Ω · cm or more. When both are conductive, the chargeability to toner is lowered and it is difficult to obtain a desired toner charge amount and toner adhesion amount.
【００１４】本発明で用いる現像剤担持体は、不連続相
ポリマーの体積抵抗を１０6Ω・ｃｍ以下の導電性にす
ることで、不連続相島部に電解が集中するいわゆる電極
効果を持たせることができる。この場合、電界がより集
中しやすいことと前述のトナー帯電性から、連続相ポリ
マーは１０13Ω・ｃｍ以上の絶縁性であることが好まし
い。本発明で用いられる導電性ポリマーを具体的にいう
と、前述の有機ポリマー類に導電性付与剤を添加したも
のが挙げられる。導電性付与剤としては、Ｎｉ、Ｃｕな
どの金属粉；ファーネスブラック、ランプブラック、サ
ーマルブラック、アセチレンブラック、チャンネルブラ
ックなどのカーボンブラック；酸化スズ、酸化亜鉛、酸
化モリブデン、酸化アンチモン、チタン酸カリなどの導
電性酸化物；酸化チタン、雲母上などにめっきを施した
無電解めっき物；グラファイト、金属繊維、炭素繊維な
どの無機系充填剤や界面活性剤などが挙げられる。導電
性付与剤を添加する場合、導電性付与剤に対する親和性
は連続相ポリマーより不連続相ポリマーの方が大きいこ
とが好ましい。これは混練時や成型時に導電性付与剤が
連続相に移行すると、不連続相の導電性を阻害すること
による。又、導電性付与剤の移行を最小限に押さえるた
め、混練時に予め導電性付与剤を不連続相ポリマーに添
加しておくことが好ましい。The developer carrying member used in the present invention has a so-called electrode effect in which electrolysis is concentrated on the discontinuous phase island portion by making the volume resistance of the discontinuous phase polymer conductive to 10 6 Ω · cm or less. be able to. In this case, it is preferable that the continuous phase polymer has an insulating property of 10 13 Ω · cm or more from the viewpoint that the electric field is more likely to be concentrated and the toner charging property described above. Specific examples of the conductive polymer used in the present invention include those obtained by adding a conductivity-imparting agent to the above-mentioned organic polymers. As the conductivity-imparting agent, metal powder such as Ni and Cu; carbon black such as furnace black, lamp black, thermal black, acetylene black and channel black; tin oxide, zinc oxide, molybdenum oxide, antimony oxide, potassium titanate, etc. Conductive oxides; titanium oxide, electroless plated products obtained by plating on mica, etc .; inorganic fillers such as graphite, metal fibers, carbon fibers, and surfactants. When the conductivity-imparting agent is added, the affinity for the conductivity-imparting agent is preferably higher in the discontinuous phase polymer than in the continuous phase polymer. This is because when the conductivity-imparting agent moves to the continuous phase during kneading or molding, the conductivity of the discontinuous phase is hindered. Further, in order to suppress migration of the conductivity-imparting agent to the minimum, it is preferable to add the conductivity-imparting agent to the discontinuous phase polymer at the time of kneading.
【００１５】本発明に係る現像剤担持体は、潜像担持体
との接触現像又は非接触現像何れの方式においても使用
可能であるが、接触現像の場合、潜像担持体との接触を
安定させるため、連続相がエラストマーであることが好
ましく、更に好ましくは連続相、非連続相ともにエラス
トマーであることが良い。この場合、ゴム硬度は４０度
（ＪＩＳ Ａ）以下であることが良い。The developer carrying member according to the present invention can be used in either contact development or non-contact development with the latent image carrying member. In the case of contact development, the contact with the latent image carrying member is stabilized. Therefore, the continuous phase is preferably an elastomer, and more preferably both the continuous phase and the discontinuous phase are elastomers. In this case, the rubber hardness is preferably 40 degrees (JIS A) or less.
【００１６】不連続相のポリマーとしては、その離型
性、低硬度性、絶縁性、環境安定性等の点からシリコー
ンゴムの使用が好ましい。シリコーンゴムに対して使用
可能な連続相エラストマーとしては、ブタジエンゴム、
スチレン−ブタジエンゴム、アクリロニトリル−ブタジ
エンゴム、イソプレゴム、クロロプレンゴム等のジエン
系ゴム、ブチルゴム、エチレン−プロピレン−ジエン−
メチレンゴム、クロロスルホン化ポリエチレンゴム、エ
チレン−酢酸ビニルゴム等のオレフィン系ゴム、その他
フッ素ゴム、エピクロルヒドリンゴム、アクリルゴム、
等を挙げることができる。As the polymer of the discontinuous phase, silicone rubber is preferably used from the viewpoints of its releasability, low hardness, insulating property, environmental stability and the like. As a continuous phase elastomer usable for silicone rubber, butadiene rubber,
Diene rubbers such as styrene-butadiene rubber, acrylonitrile-butadiene rubber, isoprene rubber, chloroprene rubber, butyl rubber, ethylene-propylene-diene-
Olefin rubber such as methylene rubber, chlorosulfonated polyethylene rubber, ethylene-vinyl acetate rubber, etc., other fluororubber, epichlorohydrin rubber, acrylic rubber,
Etc. can be mentioned.
【００１７】次に、本発明の現像剤担持体の作成方法に
ついて説明する。 導電性ポリマー、絶縁性ポリマーの調製 導電性ポリマーとして絶縁性のものを使用する場合、予
め導電性付与剤を混練する。これは樹脂やゴムに用いる
通常の方法、例えば２本ロール、３本ロール、バンバリ
ーミキサー、ニーダーなどにより行なえ、使用する材料
に応じてこれらを選択する。ポリマー自体が低抵抗の場
合この必要はない。絶縁性ポリマーに必要に応じて添加
剤を加える場合も同様にして行なう。 ポリマーのブレンド と同様の方法で異種の複数のポリマーをブレンドす
る。この際、必要に応じて相溶化剤などの添加剤を加え
ることができる。 成型 樹脂やゴムに用いる通常の方法、例えば射出成型、押出
し成型、プレス成型、蒸気加硫成型、スプレーコーティ
ング、ディッピング等の工法により、ＳＵＳ、鉄、Ａ１
等の金属ローラに代表される導電性基体に成型し、その
後表面が平滑になるように研磨を施す。 尚、導電性基体との接着性を向上するために、プライマ
ーを使用することも可能であり、この場合プライマーは
導電性であることが好ましい。Next, a method for preparing the developer carrying member of the present invention will be described. Preparation of Conductive Polymer and Insulating Polymer When an insulating polymer is used as the conductive polymer, a conductivity-imparting agent is kneaded in advance. This can be carried out by a usual method used for resins and rubbers, for example, two rolls, three rolls, Banbury mixer, kneader, etc., and these are selected according to the materials used. This is not necessary if the polymer itself has low resistance. When an additive is added to the insulating polymer as necessary, the same procedure is performed. Blend different polymers in a similar manner to blending polymers. At this time, an additive such as a compatibilizer can be added if necessary. Molding Methods such as injection molding, extrusion molding, press molding, steam vulcanization molding, spray coating, and dipping are used for resin and rubber, and SUS, iron, A1
Etc. are molded into a conductive base material typified by a metal roller, and then polished so that the surface becomes smooth. It is also possible to use a primer in order to improve the adhesiveness to the conductive substrate. In this case, the primer is preferably conductive.
【００１８】[0018]
【実施例】以下、実施例により本発明を更に詳細に説明
する。部はいずれも重量基準である。 実施例１ ＥＰＤＭゴム エチレン−プロピレン−ジエン−メチレン共重合体 １００部 （日本合成ゴム、ＥＰ２１） ｔ−ブチルクミルパーオキサイド ２部 （硬化剤；信越化学工業、Ｃ−１１） シリコーンゴム １００部 （信越化学工業、ＫＥ−５５０Ｕ） ２，５−ジメチル−２，５−ジ（ｔ−ブチルパーオキシ）ヘキサン ２部 （硬化剤；信越化学工業、Ｃ−８） 表１に示すように、ＥＰＤＭゴム／シリコーンゴム（容
積比）＝０／１００，３０／７０，７０／３０，１００
／０の割合で２本ロールで混練した。これらをＳＵＳ製
（１４ｍｍ径）芯金上に巻きつけ、下記条件でプレス成
型した。 １次加硫：１７０℃／１０分／１２０ｋｇ／ｃｍ2 ２次加硫：１５０℃／２時間 その後、研磨を施し２０ｍｍ径の現像担持体（ローラ）
を各々作成した。同様の方法で現像剤担持体（シート）
も作成した。シートの断面観察を５００倍マイクロスコ
ープ（キーエンス社製）で行ったところ、連続相（ＥＰ
ＤＭ）と平均径８μｍ程度の不連続相（シリコーンゴ
ム）が観察された。EXAMPLES The present invention will be described in more detail below with reference to examples.
To do. All parts are by weight. Example 1 EPDM rubber Ethylene-propylene-diene-methylene copolymer 100 parts (Nippon Synthetic Rubber, EP21) t-Butyl cumyl peroxide 2 parts (Curing agent; Shin-Etsu Chemical Co., C-11) Silicone rubber 100 parts (Shin-Etsu) Chemical Industry, KE-550U) 2,5-Dimethyl-2,5-di (t-butylperoxy) hexane 2 parts (Curing agent; Shin-Etsu Chemical Co., C-8) As shown in Table 1, EPDM rubber / Silicone rubber
Product ratio) = 0/100, 30/70, 70/30, 100
The mixture was kneaded with two rolls at a ratio of / 0. Made of SUS
(14 mm diameter) Wrap around a cored bar and press-mold under the following conditions
Typed Primary vulcanization: 170 ° C / 10 minutes / 120 kg / cm2 Secondary vulcanization: 150 ° C./2 hours After that, polishing is performed and a development carrier (roller) having a diameter of 20 mm is used.
Were created respectively. Developer carrier (sheet) in the same way
Also created. Cross-section observation of the sheet is 500 times microscopic
The continuous phase (EP
DM) and a discontinuous phase with an average diameter of about 8 μm (silicone
Was observed.
【００１９】図１に示した現像ユニットに前記現像剤担
持体を装着した。使用した部材を下記に示す。 トナー薄層化ブレード：ウレタンゴム（２ｍｍ厚） トナー補給ローラ：導電性ウレタンスポンジ トナー：プラス帯電トナー ついで、各現像装置について次の項目を評価した。 〔トナー離型性〕現像剤担持体上のトナーをエアーで除
去し、表面のトナー溶融付着状態に対して次のランク評
価を行なった。 ランク１ 付着全くなし ２ 付着僅かに発生 ３ ランク２より付着量は多いが拭き取りにより容易
にとれる ４ トナーが溶融状態で拭き取りでトナーがとれな
い。 〔耐摩耗性〕レーザーマイクロゲージ（岩通、ＤＴ４０
０２Ａ）で現像剤担持体の径を測定し、径の減少量を測
定した。 評価は１００時間現像剤担持体を空回し後に行なった。
同様の評価を温度／湿度：（３０℃／９０％）、（２３
℃／６０％）、（１０℃／１５％）の３環境で行なっ
た。結果を表１に示す。The developer carrying member was mounted on the developing unit shown in FIG. The members used are shown below. Toner thinning blade: Urethane rubber (2 mm thickness) Toner supply roller: Conductive urethane sponge Toner: Positively charged toner Next, the following items were evaluated for each developing device. [Toner Releasing Property] The toner on the developer carrying member was removed by air, and the following rank evaluation was performed on the state of toner melt adhesion on the surface. Rank 1 No adhesion at all 2 Adhesion slightly occurred 3 Greater adhesion than Rank 2 but easily removed by wiping 4 Toner cannot be removed by wiping in a molten state [Abrasion resistance] Laser micro gauge (Iwatsu, DT40
02A), the diameter of the developer carrying member was measured, and the amount of decrease in diameter was measured. The evaluation was performed after the developer carrying member was idle for 100 hours.
Similar evaluation is performed for temperature / humidity: (30 ° C / 90%), (23
C./60%) and (10.degree. C./15%). The results are shown in Table 1.
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】ＥＰＤＭゴムとシリコーンゴムにより連
続相、不連続相が構成されることにより、現像剤担持体
の離型性、摩耗性、耐環境性が良く満足されることが判
る。EFFECTS OF THE INVENTION It can be seen that the developer-carrying member has satisfactory releasability, abrasion resistance and environment resistance because the continuous phase and the discontinuous phase are constituted by the EPDM rubber and the silicone rubber.
【図１】本発明に係る代表的な現像装置の説明図であ
る。FIG. 1 is an explanatory diagram of a typical developing device according to the present invention.
【図２】本発明の現像装置に装着される現像剤担持体の
説明図である。FIG. 2 is an explanatory diagram of a developer carrier mounted on the developing device of the present invention.
Claims (4)
の薄層を表面に形成した現像剤担持体によって静電潜像
を現像する装置において、前記現像剤但持体の少なくと
も表面が、異なる２種以上の不定形ポリマーをブレンド
した後成型することにより連続相（海部）と不連続相
（島部）を有することを特徴とする静電潜像の現像装
置。1. An apparatus for developing an electrostatic latent image by a developer carrier having a thin layer of non-magnetic one-component toner formed on the surface by a thin layer forming member, wherein at least the surface of the developer carrier is different. An electrostatic latent image developing device having a continuous phase (sea part) and a discontinuous phase (island part) formed by blending two or more amorphous polymers and then molding.
範囲内であることを特徴とする請求項１の現像装置。2. The developing device according to claim 1, wherein the average diameter of the continuous phase is in the range of 1 μm to 500 μm.
上、不連続相の体積抵抗が１０6Ω・ｃｍ以下であるこ
とを特徴とする請求項１の現像装置。3. The developing device according to claim 1, wherein the volume resistance of the continuous phase is 10 13 Ω · cm or more and the volume resistance of the discontinuous phase is 10 6 Ω · cm or less.
解度パラメーター（ＳＰ値）の差が０．５〜２．５の範
囲内であることを特徴とする請求項１の現像装置。4. The developing device according to claim 1, wherein the difference in solubility parameter (SP value) between the continuous phase polymer and the discontinuous phase polymer is within the range of 0.5 to 2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03263105A JP3115056B2 (en) | 1991-09-13 | 1991-09-13 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03263105A JP3115056B2 (en) | 1991-09-13 | 1991-09-13 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0572889A true JPH0572889A (en) | 1993-03-26 |
| JP3115056B2 JP3115056B2 (en) | 2000-12-04 |
Family
ID=17384898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03263105A Expired - Fee Related JP3115056B2 (en) | 1991-09-13 | 1991-09-13 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3115056B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008139482A (en) * | 2006-11-30 | 2008-06-19 | Canon Inc | Developing roller, method for manufacturing developing roller, process cartridge and electrophotographic apparatus |
| US7729648B2 (en) | 2007-03-12 | 2010-06-01 | Konica Minolta Business Technologies, Inc. | Developing roller having specific surface layer, developing device provided with the developing roller and image-forming apparatus provided with developing device equipped with the developing roller |
| US9971276B2 (en) | 2015-11-16 | 2018-05-15 | Canon Kabushiki Kaisha | Developing member, method of producing developing member, process cartridge, and electrophotographic apparatus |
| US10705449B2 (en) | 2018-11-30 | 2020-07-07 | Canon Kabushiki Kaisha | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus |
| US10976683B2 (en) | 2018-07-31 | 2021-04-13 | Canon Kabushiki Kaisha | Electrophotographic member, electrophotographic process cartridge, and electrophotographic image forming apparatus |
| WO2021075371A1 (en) * | 2019-10-18 | 2021-04-22 | キヤノン株式会社 | Conductive member, manufacturing method thereof, process cartridge, and electrophotographic image forming device |
| US11112748B2 (en) | 2018-04-18 | 2021-09-07 | Canon Kabushiki Kaisha | Developing member, process cartridge and electrophotographic apparatus |
| US11347156B2 (en) | 2019-03-29 | 2022-05-31 | Canon Kabushiki Kaisha | Electro-conductive member for electrophotography, process cartridge for electrophotography, and electrophotographic image forming apparatus |
-
1991
- 1991-09-13 JP JP03263105A patent/JP3115056B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008139482A (en) * | 2006-11-30 | 2008-06-19 | Canon Inc | Developing roller, method for manufacturing developing roller, process cartridge and electrophotographic apparatus |
| US7729648B2 (en) | 2007-03-12 | 2010-06-01 | Konica Minolta Business Technologies, Inc. | Developing roller having specific surface layer, developing device provided with the developing roller and image-forming apparatus provided with developing device equipped with the developing roller |
| US9971276B2 (en) | 2015-11-16 | 2018-05-15 | Canon Kabushiki Kaisha | Developing member, method of producing developing member, process cartridge, and electrophotographic apparatus |
| US11112748B2 (en) | 2018-04-18 | 2021-09-07 | Canon Kabushiki Kaisha | Developing member, process cartridge and electrophotographic apparatus |
| US10976683B2 (en) | 2018-07-31 | 2021-04-13 | Canon Kabushiki Kaisha | Electrophotographic member, electrophotographic process cartridge, and electrophotographic image forming apparatus |
| US10705449B2 (en) | 2018-11-30 | 2020-07-07 | Canon Kabushiki Kaisha | Developing member, electrophotographic process cartridge, and electrophotographic image forming apparatus |
| US11347156B2 (en) | 2019-03-29 | 2022-05-31 | Canon Kabushiki Kaisha | Electro-conductive member for electrophotography, process cartridge for electrophotography, and electrophotographic image forming apparatus |
| WO2021075371A1 (en) * | 2019-10-18 | 2021-04-22 | キヤノン株式会社 | Conductive member, manufacturing method thereof, process cartridge, and electrophotographic image forming device |
| US11619890B2 (en) | 2019-10-18 | 2023-04-04 | Canon Kabushiki Kaisha | Electro-conductive member, manufacturing method thereof, process cartridge, and electrophotographic image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3115056B2 (en) | 2000-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0354962B1 (en) | Blade for electrophotographic apparatus | |
| US5741616A (en) | Method of developing latent electrostatic images and developer-bearing member | |
| JPH0572889A (en) | Developing device | |
| JP3035627B2 (en) | Electrostatic latent image developing method | |
| JP3115055B2 (en) | Image forming device | |
| JP3245680B2 (en) | Developer carrier and image forming method using the same | |
| JP2007193001A (en) | Manufacturing method for conductive roller | |
| JP3035628B2 (en) | Electrostatic latent image developing method | |
| JP2881215B2 (en) | Developing device | |
| JPH09311540A (en) | Developing device | |
| JP2662677B2 (en) | Developer carrier | |
| JP3035626B2 (en) | Electrostatic latent image developing method | |
| JP3024711B2 (en) | Developing device | |
| JPH09302151A (en) | Semiconductive member | |
| JP2007121553A (en) | Transfer roll and image forming apparatus | |
| JPH06214454A (en) | Developing device | |
| JP4260254B2 (en) | Office equipment member and image forming apparatus | |
| JP2968978B2 (en) | Developer carrier | |
| JP3078345B2 (en) | Developing device | |
| JPH11352787A (en) | Transfer belt | |
| JPH08234544A (en) | Elastic member for electrophotography | |
| JP2879962B2 (en) | Developing device | |
| JP3054658B2 (en) | Electrostatic latent image developing method | |
| JPH0450877A (en) | Developer carrier | |
| JP3049620B2 (en) | Developing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080929 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080929 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090929 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |