JPH0395574A - Developer carrying member and production thereof - Google Patents
Developer carrying member and production thereofInfo
- Publication number
- JPH0395574A JPH0395574A JP1231770A JP23177089A JPH0395574A JP H0395574 A JPH0395574 A JP H0395574A JP 1231770 A JP1231770 A JP 1231770A JP 23177089 A JP23177089 A JP 23177089A JP H0395574 A JPH0395574 A JP H0395574A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- carrier
- coating
- graphite
- carrying member
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010439 graphite Substances 0.000 claims abstract description 21
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 21
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000011247 coating layer Substances 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 7
- 239000002344 surface layer Substances 0.000 abstract description 3
- 239000005011 phenolic resin Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、電子写真、静電記録装置に用いられる現像装
置に関し、詳細には、現像装置に用いられる現像剤担持
体の表面改質技術に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a developing device used in electrophotography and electrostatic recording devices, and in particular, a technique for surface modification of a developer carrier used in the developing device. It is related to.
［従来の技術］
従来、電子写真法としては米国特許第２． ２９７６９
１号明細書、特公昭４２−２３９１０号公報及び特公昭
４３−２４７４８号公報等に記載されている如く、多数
の方法が知られているが一般には光導電性物質を利用し
、種々の手段により感光体上に電気的潜像を形成し、次
いで該潜像をトナーを用いて現像し、必要に応じて紙等
の転写材にトナー画像を転写した後、加熱、圧力或いは
溶剤蒸気などにより定着し複写物を得るものである。[Prior Art] Conventionally, as an electrophotographic method, US Patent No. 2. 29769
As described in Japanese Patent Publication No. 1, Japanese Patent Publication No. 42-23910, Japanese Patent Publication No. 43-24748, etc., a large number of methods are known, but in general, photoconductive substances are used and various means are used. An electrical latent image is formed on the photoreceptor using a method, and then the latent image is developed using toner, and if necessary, the toner image is transferred to a transfer material such as paper. It is used to fix and obtain copies.
また、電気的潜像をトナーを用いて可視化する方法も種
々知られている。Various methods are also known for visualizing electrical latent images using toner.
例えば米国特許第２，８７４，０６３号明細書に記載さ
れている磁気ブラシ法、同２，６１８，５５２号明細書
に記載されているカスケード現像方法及び同２． ２２
１７７６号明細書に記載されている粉末雲法及びファー
ブラシ現像法、液体現像法等多数の現像〆去が知られて
いる。For example, the magnetic brush method described in U.S. Pat. No. 2,874,063, the cascade development method described in U.S. Pat. No. 2,618,552, and U.S. Pat. 22
A number of development methods are known, such as the powder cloud method, fur brush development method, and liquid development method described in No. 1776.
これらの現像法に於で、特にトナーを粉休状態にて用い
る乾式現像法が、現像剤の取扱いの点、等より広く実用
されている。Among these developing methods, the dry developing method, in which the toner is used in a powder-free state, is in particular widely used in view of the handling of the developer.
これらの方法に用いられる現像剤担持体としては、例え
ば、特開昭５７−６６４５５号公報に見られるように、
アルミニウム，ニッケル，ステンレス鋼等の金属或いは
、合金化合物を円筒状に成型し、その表面を電解、プラ
ス１・、ヤスリ等で所定の表面粗度になるように処理す
る事が知られており、広く用いられている。As developer carriers used in these methods, for example, as seen in Japanese Patent Application Laid-Open No. 57-66455,
It is known that metals such as aluminum, nickel, stainless steel, or alloy compounds are formed into a cylindrical shape, and the surface is treated with electrolysis, plus 1, sanding, etc. to a predetermined surface roughness. Widely used.
これらの現像剤担持体は、安価であり比較的安定して質
の高い画像が得られる反面、現像剤担持体より帯電付与
の行なわれている一成分現像剤に於いてはトナー帯電の
調整が難しく、現像剤による」二夫が種々なされている
が、帯電の不均一性に関る問題は、完全には解決されて
いない。These developer carriers are inexpensive and can provide relatively stable and high-quality images, but on the other hand, it is difficult to adjust the toner charge in single-component developers that are charged by the developer carrier. Although various attempts have been made to overcome this problem by using a developer, the problem of non-uniform charging has not been completely solved.
これに対し、特開昭６０−８０８７６号公報に見られる
ように、該現像剤担持体表面を導電性を有する被膜剤に
て被覆若しくは被膜剤により担持体を構成ずる事か提案
されている。On the other hand, as seen in Japanese Patent Application Laid-Open No. 60-80876, it has been proposed to coat the surface of the developer carrier with a coating agent having conductivity or to construct the carrier with a coating agent.
本発明者らが、検討した結果、負帯電性一成分現像剤に
対する現像剤担持体の被覆層としては、グラファイトを
添加した結着樹脂により構成する事により、現像剤の帯
電が安定し、画像濃度が高く、鮮明な画像が得られる事
が確認された。As a result of studies conducted by the present inventors, the coating layer of the developer carrier for a negatively chargeable one-component developer is composed of a binder resin containing graphite, which stabilizes the charge of the developer and improves the image quality. It was confirmed that high density and clear images could be obtained.
このような被膜層は、通常、特開昭５２−１．１９６５
１号公報に見られるように、被膜剤を予め溶媒に分敗し
、液体若しくはペース１・状の塗料とし、担持体の基体
に付着させ、その後、光照射、加熱等により被膜層を硬
化させている。Such a coating layer is usually disclosed in Japanese Patent Application Laid-open No. 52-1.1965.
As seen in Publication No. 1, the coating agent is divided into a solvent in advance to form a liquid or paste-like paint, which is applied to the base of a carrier, and then the coating layer is cured by light irradiation, heating, etc. ing.
上記の方法に於いては、グラファイトのような顔料成分
の分散状態及びその分散安定性が、塗利の性能及取扱の
簡便さ等に大きく関与する。現時点でのグラファイトを
用いた被膜剤及その塗判には、以下の問題点がある。In the above method, the state of dispersion of the pigment component such as graphite and its dispersion stability greatly affect the performance of the coating material and the ease of handling. The current coating agents and coatings using graphite have the following problems.
？１）通常、グラファ１イトはリン片状の形態を有し■
ている為、平均粒径値が１０４ｚ以下の月料であっても
、長軸方向では、］００μを超える幅を有しており、単
分散状態に於いても、グラファイ１〜粒子１ヶ当りの重
量が重く、塗料内にて顔利の沈降を起し、塗別のボッ１
・ライフが短いという問題となる。? 1) Normally, graphite has a scale-like morphology, so even if the average grain size is 104z or less, it has a width exceeding 00μ in the long axis direction. Even in a monodispersed state, the weight of each graphite particle is heavy, which causes sedimentation of the pigment in the paint, resulting in bottling of each coating.
・The problem is that life is short.
（２）グラファイトは、リン片状である為に、担持体表
面にｈ合いて、巨視的に見て、導電面（顔利面）と、絶
縁面（樹脂面）との比か、安定した状態に於いても、微
視的（現像剤ザイズレベル）に見ると不均一な表面であ
り、１・ナーに対ずる帯電伺与能力が不均一となる。(2) Since graphite is scale-like, it fits onto the surface of the carrier, and from a macroscopic perspective, the ratio between the conductive surface (grain surface) and the insulating surface (resin surface) is stable. Even in this state, when viewed microscopically (developer size level), the surface is non-uniform, and the charging ability for 1.ner is non-uniform.
これにより極部的に１・ナーコート層の厚みが変化し、
濃度が変化する。As a result, the thickness of the 1-Nacoat layer changes locally,
Concentration changes.
［発明が解決しようとする課題］
本発明の目的は、上述の如き欠点を解決した現像剤担持
体を提供するものである。[Problems to be Solved by the Invention] An object of the present invention is to provide a developer carrier that solves the above-mentioned drawbacks.
さらに、本発明の目的は、帯電｛−１与か安定して行な
われる現像剤担持体を提供するものである。A further object of the present invention is to provide a developer carrier that can be stably charged to {-1}.
さらに、本発明の■目的は、微視的に担持体表面を観察
した場合でも、均一な表面層を有する現像剤担持体を提
供する事にある。Furthermore, an object of the present invention is to provide a developer carrier having a uniform surface layer even when the surface of the carrier is observed microscopically.
さらに、本発明の目的は、上記現像剤担持体を製造する
に当り塗料が高安定であり、簡便に取扱える現像剤担持
体製造方法を提供する事にある。A further object of the present invention is to provide a method for producing a developer carrier in which the coating material used for producing the developer carrier is highly stable and can be easily handled.
［課題を解決するための手段及び作用］以上、発明の目
的は、
（１）現像剤担持体表面に、負帯電性一成分現像剤を供
給し、規制部材により薄く均一な現像剤層を形成し、こ
の現像剤層を静電潜像保持体近傍に送り、該担持体に現
像ハイアスを印加し、静電像を現像する一成分現像装置
に適用される現像剤担持体において、該現像剤担持体表
面を、平均粒径１μ以下かつ長軸／短軸比１０以下のグ
ラファイ１・及び結着樹脂を含む被膜剤にて、被覆した
ことを特徴とする現像剤担持体。[Means and effects for solving the problems] As described above, the purpose of the invention is to: (1) supply a negatively chargeable monocomponent developer to the surface of a developer carrier and form a thin and uniform developer layer using a regulating member; In a developer carrier applied to a one-component developing device that sends this developer layer to the vicinity of an electrostatic latent image carrier and applies a development high-speed to the carrier to develop an electrostatic image, the developer A developer carrier characterized in that the surface of the carrier is coated with a coating agent containing graphite 1 having an average particle diameter of 1 μm or less and a major axis/minor axis ratio of 10 or less and a binder resin.
（２） Ｊ：記の被膜剤を、液体若しくは、ペースト状
のように、溶媒に分散された状態にて、現像剤担持体の
基体上に付着させ、その後、光照射、加熱等により硬化
させて被膜層を形成することを特徴とする現像剤担持体
の製造方法により達成される。(2) J: The coating agent described below is applied in a state dispersed in a solvent, such as a liquid or paste, onto the base of a developer carrier, and then cured by light irradiation, heating, etc. This is achieved by a method for manufacturing a developer carrier, which is characterized in that a coating layer is formed by a method of manufacturing a developer carrier.
以１ミ、本発明に用いるイｌ′Ａ′．ｌ、処方について
説明する。Below, I'A'. used in the present invention. l. Explain the prescription.
本発明に用いられるグラファイトとしては、天然物、人
造品のいづれでも使用可能である。The graphite used in the present invention can be either a natural product or an artificial product.
グラファイ１・の粒径としては、先にも述べたように、
形状が燐片状であり、一概に規定できない事、また後述
するように、ザンドミル等にて分１１々する事により変
化する等より、特定の範囲を示すことは困難であるが、
本発明の主旨より、長軸方向（ヘキ壊面方向）の巾とし
て、１０μ以下である事か望ましく、長軸／短軸比が１
０以下が望ましい。As mentioned earlier, the particle size of Graphite 1.
It is difficult to indicate a specific range because the shape is scaly and cannot be defined unconditionally, and as will be described later, it changes due to being divided into parts using a sand mill etc.
From the purpose of the present invention, it is desirable that the width in the major axis direction (in the direction of the broken surface) is 10μ or less, and the major axis/minor axis ratio is 1.
Desirably 0 or less.
測定方法としては、利料を直接顕微鏡にて観察する事が
、最も確実な手段であり、簡易な方法としては、通常の
粒度分布計（電気抵抗式、？尤降式、遠心式、レーザー
散乱式等）により、測定を行ない最大値を求める事もで
きる。The most reliable method of measurement is to directly observe the particles with a microscope, and the simplest method is to use a regular particle size analyzer (electrical resistance type, ?-decrease type, centrifugal type, laser scattering type). It is also possible to measure and find the maximum value using formulas, etc.
グラファイトの結晶化度としては、６０％以上である事
が望ましい。これは、本特性がヘキ壊のしやすさに影響
する特性であり、被膜特性に於ける初期状態と耐久状態
との差に影響すると考えられる特性だからである。The crystallinity of graphite is preferably 60% or more. This is because this property is a property that affects the susceptibility to cracking, and is a property that is thought to affect the difference between the initial state and the durable state in the film properties.
結晶化度の測定方法としては、種々の方法があるが、Ｘ
線回折による、データーが一般的でありまた再現性もよ
い。There are various methods for measuring crystallinity, but
The data obtained by line diffraction is general and has good reproducibility.
本発明に用いる結着樹脂としては、フェノール樹脂，エ
ボキシ樹脂，ポリカーボネート樹脂等、種々の材料が挙
げられ、一般的に、トナーに対し、正極性に摩擦帯電を
起す物質であれば、結着樹脂として使用できる。The binder resin used in the present invention includes various materials such as phenol resin, epoxy resin, and polycarbonate resin. Can be used as
このうち、熱硬化性樹脂は、製造面、耐久面より好まし
い。Among these, thermosetting resins are preferable in terms of manufacturing and durability.
また、トナーの帯電安定性より、フェノール樹脂が、最
も好ましく用いられる。フェノール樹脂にはフェノール
とホルムアルデヒドより成る純フェノール樹脂，エステ
ルガムと純フェノール系を組み合わせた変性フェノール
樹脂があり、いずれも使用できる。Furthermore, in view of the charging stability of the toner, phenol resin is most preferably used. Phenol resins include pure phenol resin made of phenol and formaldehyde, and modified phenol resin made by combining ester gum and pure phenol, and either of them can be used.
フェノール薄膜は熱硬化反応により密な三次元の架橋構
造を形成するため、他の熱硬化樹脂（ポリウレタン，ボ
リアミド）に比べ非常に硬い塗膜を形成することができ
る事により好ましく用いられる。Phenol thin film forms a dense three-dimensional crosslinked structure through a thermosetting reaction, and is therefore preferably used because it can form a coating film that is much harder than other thermosetting resins (polyurethane, polyamide).
本発明に用いられる、担持体基体としては、金属、合金
化合物の他、非金属の物質についても使用する事ができ
る。As the carrier substrate used in the present invention, in addition to metals and alloy compounds, non-metallic substances can also be used.
但し、本発明の構成上、スリーブを電極として用いてい
る為、非金属物質、例えばプラスチック成型品を用いる
場合、通電できる構成にしておく必要がある。例えば、
表面に金属とＸ着等により吸着させる、導電性を有する
樹脂により構成する等である。However, due to the structure of the present invention, since a sleeve is used as an electrode, when a non-metallic material such as a plastic molded product is used, it is necessary to have a structure that can conduct electricity. for example,
For example, the metal may be adsorbed to the surface by X adhesion, or it may be made of conductive resin.
次いで、本発明に於ける製造方法について述べる。Next, the manufacturing method according to the present invention will be described.
本発明に用いる被膜剤は、結着樹脂可溶な溶剤、例えば
フェノールに対しては、メタノールプロビルアルコール
等のアルコール系溶媒等に固形分として５〜５０ｗｔ％
になるよう、被膜剤の原祠才，１を加え、ザントミル，
ボールミル，ア１・ライター等で、顔料分を分散し、被
膜剤原液を得る。The coating agent used in the present invention is dissolved in a binder resin-soluble solvent, for example, for phenol, 5 to 50 wt% of the solid content is dissolved in an alcoholic solvent such as methanol-propyl alcohol.
Add 1 of the coating agent and add Zantmil,
Disperse the pigment using a ball mill, A1 lighter, etc. to obtain a coating agent stock solution.
この被膜剤原演に対し、溶媒を添加し、製造方法に見合
う固形分に調整し、塗工液とする。A solvent is added to this coating agent base to adjust the solid content to suit the manufacturing method, and a coating solution is obtained.
この塗工液を担持体基体上に塗布し、指触乾燥させた後
、加熱若しくは、露光により、被膜層を硬化させ、現像
剤担持体とする。This coating liquid is applied onto a carrier base, and after drying to the touch, the coating layer is cured by heating or exposure to form a developer carrier.
塗布方法としては、スプレー法、ディンビングｔ五、口
−ラーコー１・冫去、ハー：Ｉ−１・？ム、青７ｌ電塗
装法等が用いられる。Application methods include spray method, Diving t5, Kuchi-Rakko 1・determination, Ha: I-1・? A blue 7l electric coating method is used.
次いで、本発明に用いる各成分の構成比について説明す
るが、以下は特に好ましい範囲であり、本発明が下記範
囲内に限定されるものではない。Next, the composition ratio of each component used in the present invention will be explained, but the following are particularly preferred ranges, and the present invention is not limited to the following ranges.
本発明に於ける（グラファイト）／（樹脂）の比は、２
／１〜１／３の範囲で特に好ましい結果を与える。２／
１より大きい場合は被膜強度の低下が認められ、また１
／３未満では、結着樹脂の影響による、現像剤の不正コ
ー１・が発生する可能性が高い事による。In the present invention, the ratio of (graphite)/(resin) is 2
Particularly preferable results are obtained in the range of /1 to 1/3. 2/
If it is greater than 1, a decrease in film strength is observed;
If the ratio is less than /3, there is a high possibility that the developer will cause improper code 1 due to the influence of the binder resin.
本発明に於いては、さらに、以下の物質を添１ｊ］１し
てもよい。In the present invention, the following substances may also be added.
被膜の抵抗を調整する為に、導電性物質を添加してもよ
い。A conductive substance may be added to adjust the resistance of the coating.
導電性物質としては、アセチレンブラック、オイルブラ
ック等、導電カーボン、鉄、鉛、錫等の金属扮、酸化ス
ズ、酸化アンチモン等金属酸化物が挙げられる。その添
加量は、先に挙げた２７１〜１／３の範囲で使用で．き
る。Examples of the conductive substance include conductive carbon such as acetylene black and oil black, metal oxides such as iron, lead, and tin, and metal oxides such as tin oxide and antimony oxide. The amount to be added can be within the range of 271 to 1/3 of the amount listed above. Wear.
また、１−ナーの４ｉ；ｊ電を、より安定させる／″シ
に１・ナーに用いられる・｝；｝・蛍制ｉ卸剤を添加し
て・ら上い。例えば、ニグロシン、４級アンモニウム塩
、ホウ酸化合物、リン酸化合物等が挙げられる。In addition, it is recommended to add a fluorescent inhibitor used in 1-ner to stabilize the 4i; Examples include ammonium salts, boric acid compounds, phosphoric acid compounds, and the like.
いづれの場合に於いても、１μ以下のクラファイ１・を
用いる事により、安定した現像剤担持体表面を保持させ
る事ができる。In either case, a stable surface of the developer carrier can be maintained by using Krafay 1 with a thickness of 1 μm or less.
本発明に於ける、担持体表面の粗度は、面積平均値（以
下Ｒａ）として、０２〜５．０μの範囲てある。表面粗
度か０．２μ未満では担持能力が低下し好ましくなく、
また５．０ｕ？：超える場合で（：１：、１・ナーコー
ト層が厚くなり、飛散等、不正現像が目立つようになり
好ましくない。In the present invention, the surface roughness of the carrier is in the range of 02 to 5.0 μm as an area average value (hereinafter referred to as Ra). If the surface roughness is less than 0.2μ, the supporting capacity will decrease, which is not preferable.
5.0u again? : If it exceeds (:1:, 1), the Nurcoat layer becomes thicker and irregular development such as scattering becomes noticeable, which is not preferable.
以上、本発明に於ける基本的な構成について説明したが
、これらの範囲内に限定されるものではない。Although the basic configuration of the present invention has been described above, it is not limited to these scopes.
次いで、具体的に実施例を示す。Next, examples will be specifically shown.
［実施例］ 以下、部は重量部を意味する。[Example] Hereinafter, parts mean parts by weight.
以上の被膜剤を、イソプロビルアルコール（以下、ＩＰ
Ａ ） ６０部に加え混合し、φ１ステンレスポールを
充填したザンドミルにて分散し、塗料原液を得た。The above coating agent was mixed with isopropyl alcohol (hereinafter referred to as IP).
A) 60 parts were added and mixed, and dispersed in a sand mill filled with φ1 stainless steel poles to obtain a paint stock solution.
この一部を共栓付２０ｃｃのメスシリンダーに入れ、一
晩放置し７８時間後の顔料分散部と、上澄み部の境界の
値をメスシリンダーの目盛より読み取１１
り、次式により、沈降率として、算出する。A portion of this was placed in a 20cc graduated cylinder with a stopper, and left overnight.After 78 hours, the value at the boundary between the pigment dispersed part and the supernatant part was read from the scale of the graduated cylinder11, and calculated as the sedimentation rate using the following formula. ,calculate.
沈降率［％］
以上の塗料原液に対しＩＰＡ ２０部を加え塗工液とし
、ディッピング法を用いて、φ２０のＡＩ！担持体ｌｉ
ｔ体上にｌＯμの被膜層を形成させ、次いで、熱風式乾
燥炉により、１６０゜Ｃ／３０ｍｍ加熱し硬化させる。Sedimentation rate [%] Add 20 parts of IPA to the above paint stock solution to make a coating solution, and use the dipping method to apply φ20 AI! carrier li
A coating layer of lOμ is formed on the t-body, and then heated to 160°C/30mm in a hot air drying oven to harden it.
でき上った被膜層の表面粗さは、面積平均値（Ｒａ）ど
して、〕．５μであった。The surface roughness of the completed coating layer is determined by the area average value (Ra), etc. It was 5μ.
この現像剤担持体を、感光層をα−Ｓｊとし、ネガトナ
ー用に改造した、ＮＰ−５５４０ （キヤノン社製複
写機）に取り付け、２５℃／ ５０ＲＨ％の環境下にて
、１万枚の通紙試験を実施し、次の項目に従い評価した
。This developer carrier was attached to an NP-5540 (Canon Co., Ltd. copying machine) with a photosensitive layer of α-Sj and modified for use with negative toner, and 10,000 sheets were printed in an environment of 25°C/50RH%. A paper test was conducted and evaluated according to the following items.
■画像濃度
Ｑ ： １．４以上
○：ｌ．２ 〜１．４
△ ・ １．０ 〜１２
Ｘ ： １．０以下
■画質（ガザツキ、細線再現性、トビチリ等、１２
目視により確認〉
０ 優秀 ○．良好 △：実用可 ×：実用不可以上の
結果を表−１に示す。■Image density Q: 1.4 or more ○: l. 2 ~ 1.4 △ ・ 1.0 ~ 12 The results are shown in Table-1.
また、担持体表面を、走査型電子顕微鏡（ＳＥＭ）で観
察したところ、１０μ以上のグラファイト面は、認めら
れず、かつ、低倍率（Ｘ５００）に於いて、結着樹脂と
グラファイトの均質な面が、できている事が確認された
。Furthermore, when the surface of the carrier was observed using a scanning electron microscope (SEM), no graphite surface larger than 10μ was observed, and at low magnification (X500), a homogeneous surface of the binder resin and graphite was observed. However, it was confirmed that it was possible.
Ｋ厳盟ニュ
グラファイトを昭和電工社製、ＵＦＧ− ２長軸５．０
μ、長／短軸比３、平均粒径０．６μとする以外は、実
施例−１と同様に、分散、塗布、評価を行なった。K-gonmei new graphite manufactured by Showa Denko, UFG-2 long axis 5.0
Dispersion, coating, and evaluation were performed in the same manner as in Example 1, except that μ, long/short axis ratio was 3, and average particle size was 0.6 μ.
結果を表−１に示す。The results are shown in Table-1.
及息里ニュ
グラファイト量を２．５部、フェノール樹脂を７．５部
とする以外は実施例−１と同様に、分散、塗布、評価を
行なった。Dispersion, coating, and evaluation were carried out in the same manner as in Example 1, except that the amount of Oishuri graphite was 2.5 parts and the phenol resin was 7.5 parts.
結果を表−１に示す。The results are shown in Table-1.
友息皿二Ａ
グラファイ１・量を６．７部、フェノール樹脂量を３．
３部とする以外は実施例一↓と同様に、分散、塗布、評
価を行なった。Friendship Plate 2 A: 1. Graphite: 6.7 parts, phenol resin: 3.
Dispersion, application, and evaluation were carried out in the same manner as in Example 1↓ except that 3 parts were used.
結果を表−１に示す。The results are shown in Table-1.
處０口赴二」エ
グラファイ１〜を昭和電工社製ＵＦＧ〜３０、長軸５．
０μ，長軸／短軸比２０，平均粒径４μとする以外実施
例−１と同様に、分散、塗布、評価を行なった。Egraphite 1~ is manufactured by Showa Denko Co., Ltd. UFG~30, long axis 5.
Dispersion, coating, and evaluation were carried out in the same manner as in Example 1, except that the particle size was 0μ, the major axis/minor axis ratio was 20, and the average particle size was 4μ.
結果を表−１に示す。The results are shown in Table-1.
また、担持体表面を、ＳＥＭにより観察したところ、低
倍率に於いては、均質な面であったが、詳細に観察した
ところ、１００ＩＬ以上のグラファイ１・面が、所々認
められた。Further, when the surface of the carrier was observed by SEM, it was found to be a homogeneous surface at low magnification, but when observed in detail, graphite 1. surfaces of 100 IL or more were observed in some places.
處校生二１
φ２０の八２円筒表面に、実施例−■と同等の表面粗度
を設ける為に、サンドブラストにより表面を粗した以外
、実施例−１と同様に評価を行なった。Evaluation was carried out in the same manner as in Example 1, except that the surface of the 20-diameter 82 cylinder was roughened by sandblasting in order to provide the same surface roughness as in Example-■.
結果を表−１に示す。The results are shown in Table-1.
１ ５
［発明の効果コ
本発明によれば、上述の如き被膜剤を現像剤担持体表面
に被覆しているためや、当該表面層は均で帯電付与が安
定して行なわれ、高品質の画像を与えることができる。1 5 [Effects of the Invention] According to the present invention, because the surface of the developer carrier is coated with the above-mentioned coating agent, the surface layer is uniform and charging is stably performed, and high quality is achieved. Images can be given.
Claims (2)
給し、規制部材により薄く均一な現像剤層を形成し、こ
の現像剤層を静電潜像保持体近傍に送り、該担持体に現
像バイアスを印加し、静電像を現像する一成分現像装置
に適用される現像剤担持体において、該現像剤担持体表
面を、平均粒径１μ以下かつ長軸／短軸比１０以下のグ
ラファイト及び結着樹脂を含む被膜剤にて、被覆したこ
とを特徴とする現像剤担持体。(1) A negatively chargeable component developer is supplied to the surface of the developer carrier, a thin and uniform developer layer is formed by a regulating member, and this developer layer is sent to the vicinity of the electrostatic latent image carrier. In a developer carrier applied to a one-component developing device that develops an electrostatic image by applying a developing bias to the carrier, the surface of the developer carrier has an average particle size of 1 μm or less and a major axis/minor axis ratio of 10. A developer carrier coated with the following coating agent containing graphite and a binder resin.
ラファイト及び結着樹脂を含む被膜剤を、液体若しくは
ペースト状のように、溶媒に分散された状態にて、現像
剤の担持体の基体上に付着させ、その後、光照射、加熱
等により硬化させて被覆層を形成することを特徴とする
現像剤担持体の製造方法。(2) A coating agent containing graphite and a binder resin with an average particle diameter of 1 μm or less and a major axis/minor axis ratio of 10 or less is dispersed in a solvent, such as in a liquid or paste form, to support the developer. 1. A method for manufacturing a developer carrier, which comprises depositing the developer on a substrate and then curing it by light irradiation, heating, etc. to form a coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1231770A JPH0395574A (en) | 1989-09-08 | 1989-09-08 | Developer carrying member and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1231770A JPH0395574A (en) | 1989-09-08 | 1989-09-08 | Developer carrying member and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0395574A true JPH0395574A (en) | 1991-04-19 |
Family
ID=16928759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1231770A Pending JPH0395574A (en) | 1989-09-08 | 1989-09-08 | Developer carrying member and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0395574A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0720070A2 (en) * | 1994-12-28 | 1996-07-03 | Canon Kabushiki Kaisha | Developer carrying member, developing assembly, image forming apparatus, and process cartridge |
| US8129938B2 (en) | 2006-01-13 | 2012-03-06 | Solar Focus Technology Co., Ltd. | Multi power supply system for a portable device |
-
1989
- 1989-09-08 JP JP1231770A patent/JPH0395574A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0720070A2 (en) * | 1994-12-28 | 1996-07-03 | Canon Kabushiki Kaisha | Developer carrying member, developing assembly, image forming apparatus, and process cartridge |
| EP0720070A3 (en) * | 1994-12-28 | 1997-01-02 | Canon Kk | Developer carrying member, developing assembly, image forming apparatus, and process cartridge |
| US5860050A (en) * | 1994-12-28 | 1999-01-12 | Canon Kabushiki Kaisha | Developer carrying member, developing assembly, image forming apparatus, and process cartridge |
| US8129938B2 (en) | 2006-01-13 | 2012-03-06 | Solar Focus Technology Co., Ltd. | Multi power supply system for a portable device |
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