JPH05119516A - Toner for electrophotography - Google Patents
Toner for electrophotographyInfo
- Publication number
- JPH05119516A JPH05119516A JP3308328A JP30832891A JPH05119516A JP H05119516 A JPH05119516 A JP H05119516A JP 3308328 A JP3308328 A JP 3308328A JP 30832891 A JP30832891 A JP 30832891A JP H05119516 A JPH05119516 A JP H05119516A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- antimony
- tin oxide
- fine powder
- specific resistance
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電子写真法、静電印刷法
等に使用される電子写真用トナーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic toner used in electrophotography, electrostatic printing and the like.
【０００２】[0002]
【従来の技術】従来より電子写真法等に使用される現像
剤としては、結着樹脂を主成分とする絶縁性微粉末、す
なわちトナーと該トナーを摩擦により帯電させ、感光体
上に形成した静電潜像上の電荷に応じてトナーを付着さ
せる働きを有するキャリアとを混合させたものが用いら
れている。この場合トナーはポリスチレン系等の結着樹
脂類にカーボンブラック等の着色剤及び染料を適当な比
率で混合し、熱溶融混練後、１〜２５μｍに微粉砕した
ものが用いられている。また、キャリアは数１０〜数１
００μｍの磁性金属粒子をそのまま、あるいは磁性金属
粒子表面を樹脂で被覆したものを用いるのが一般的であ
る。上記現像剤を用いて多数枚の連続複写を行うと、キ
ャリア表面にトナー成分の付着、すなわちスペントトナ
ーが発生し、現像剤の寿命を短かくするという問題を有
していた。また、現像器内の攪拌によるトナーの摩擦帯
電量の上昇も現像剤劣化の大きな要因であり、複写枚数
が多くなるにつれて、画像濃度の低下、地カブリの発生
といった問題を有していた。とくに近年、複写画像の高
画質化志向にともなって、トナーは小粒径化の方向にあ
るがトナーが小粒径になると、キャリアとの接触がおき
やすくなり、スペントトナーの発生、摩擦帯電量の上昇
がさらにいちじるしく生じ、この問題を改善することが
強く望まれていた。そこでこのような問題を解決する目
的で、導電性のカーボンブラックや金属化合物をトナー
中に含有あるいはトナー粒子の表面に付着する方法が提
案されているが、いまだ満足する効果は得られていな
い。2. Description of the Related Art Conventionally, as a developer used in electrophotography or the like, an insulating fine powder containing a binder resin as a main component, that is, a toner and the toner are charged by friction and formed on a photoreceptor. A mixture of a carrier having a function of adhering toner according to an electric charge on the electrostatic latent image is used. In this case, as the toner, a binder resin such as polystyrene is mixed with a colorant such as carbon black and a dye at an appropriate ratio, and the mixture is melted and kneaded and then finely pulverized to 1 to 25 μm. In addition, the carrier is tens to tens
It is general to use magnetic metal particles of 00 μm as they are, or those whose surface is coated with resin. When a large number of sheets are continuously copied using the developer, there is a problem that toner components adhere to the carrier surface, that is, spent toner is generated and the life of the developer is shortened. Further, the increase in the triboelectric charge amount of the toner due to the stirring in the developing device is also a major factor in the deterioration of the developer. As the number of copies increases, the image density decreases and the background fog occurs. In particular, in recent years, with the tendency toward higher image quality of copied images, the toner has a tendency toward smaller particle diameter, but when the toner has a smaller particle diameter, it is easy to make contact with the carrier, and the occurrence of spent toner and the triboelectric charge amount. There was a strong demand for improvement in this problem, as the rise in the price of electricity increased even more drastically. Therefore, for the purpose of solving such a problem, a method of containing conductive carbon black or a metal compound in the toner or adhering it to the surface of the toner particles has been proposed, but the satisfactory effect has not been obtained yet.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、キャリアに
スペントトナーの発生を抑止し、多数枚の連続複写時に
摩擦帯電量が上昇せず、画像濃度の低下及び地カブリの
発生しない電子写真用トナーを提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention is for electrophotography which suppresses the generation of spent toner on a carrier, does not increase the triboelectric charge amount during continuous copying of a large number of sheets, and reduces image density and background fog. The purpose is to provide a toner.
【０００４】[0004]
【課題を解決するための手段】本発明は、比抵抗が１０
Ω・ｃｍ以下のアンチモンをドープした酸化スズ微粉末
あるいは、比抵抗が５０Ω・ｃｍ以下で、かつアンチモ
ンをドープした酸化スズの導電膜を表面に形成させた酸
化チタン微粉末を、トナー母体粒子１００重量部の表面
に０．０５〜５重量部付着させてなることを特徴とする
電子写真用トナーである。以下、本発明を詳細に説明す
る。The present invention has a specific resistance of 10
Toner base particles 100 are obtained by using tin oxide fine powder doped with antimony of Ω · cm or less or titanium oxide fine powder having a specific resistance of 50 Ω · cm or less and a conductive film of tin oxide doped with antimony formed on the surface. The toner for electrophotography is characterized in that 0.05 to 5 parts by weight of the toner is attached to the surface of the toner. Hereinafter, the present invention will be described in detail.
【０００５】本発明に使用するアンチモンをドープした
酸化スズ微粉末とは、ＳｎＯ2 の原子配列の一部のＳｎ
がＳｂで置換された金属化合物であって、具体的には、
三菱マテリアル社の商品名 Ｔ−１等が挙げられる。ま
た、アンチモンをドープした酸化スズの導電膜を表面に
形成させた酸化チタン微粉末とは、上記のアンチモンを
ドープした酸化スズを表面に被覆させた酸化チタン微粉
末であって、具体的には三菱マテリアル社の商品名 Ｗ
−１，Ｗ−１−Ｐ，Ｗ−１０等が挙げられる。The antimony-doped tin oxide fine powder used in the present invention means Sn which is a part of the atomic arrangement of SnO 2.
Is a metal compound substituted with Sb, and specifically,
Trade name T-1 of Mitsubishi Materials Corp., etc. may be mentioned. Further, the titanium oxide fine powder on the surface of which a conductive film of antimony-doped tin oxide is formed is a titanium oxide fine powder whose surface is coated with the above-mentioned antimony-doped tin oxide. Product name W of Mitsubishi Materials
-1, W-1-P, W-10 and the like can be mentioned.
【０００６】本発明においては、アンチモンをドープし
た酸化スズ微粉末は比抵抗が１０Ω・ｃｍ以下でなけれ
ばならず、またアンチモンをドープした酸化スズの導電
膜を表面に形成させた酸化チタン微粉末の比抵抗は５０
Ω・ｃｍ以下でなければならない。この規定値を越えた
ものでは、本発明のトナーに必要である十分な導電性が
得られないために連続コピーの過程で摩擦帯電量の上昇
を防ぐことができない。In the present invention, the antimony-doped tin oxide fine powder must have a specific resistance of 10 Ω · cm or less, and the antimony-doped tin oxide conductive powder is formed on the surface of the titanium oxide fine powder. Has a specific resistance of 50
Must be Ω · cm or less. If the amount exceeds the specified value, the sufficient conductivity required for the toner of the present invention cannot be obtained, so that the increase in the triboelectric charge amount cannot be prevented during the continuous copying process.
【０００７】本発明において、比抵抗の測定は次のよう
にして求めることができる。すなわち、アンチモンをド
ープした酸化スズ微粉末あるいはアンチモンをドープし
た酸化スズの導電膜を表面に形成させた酸化チタン微粉
末を５ｇ秤量し、該微粉末を図１に示すような測定装置
の内筒２に投入する。そして、内筒２における微粉末の
層の厚さを測定し、上部電極１と主電極４との間に直流
電圧を加えて、その時の電流値を測定し、下記式にて比
抵抗を求める。 ρ＝Ｒ×Ｓ／ｔ ρ：比抵抗（Ω・ｃｍ） Ｒ：測定抵抗値（Ω）（印加電圧／電流値） Ｓ：主電極の断面積（ｃｍ2 ） ｔ：層の厚さ（ｃｍ）In the present invention, the specific resistance can be measured as follows. That is, 5 g of antimony-doped tin oxide fine powder or titanium oxide fine powder having an antimony-doped tin oxide conductive film formed on the surface thereof was weighed, and the fine powder was measured in an inner cylinder of a measuring device as shown in FIG. Add to 2. Then, the thickness of the layer of fine powder in the inner cylinder 2 is measured, a DC voltage is applied between the upper electrode 1 and the main electrode 4, the current value at that time is measured, and the specific resistance is calculated by the following formula. .. ρ = R × S / t ρ: Specific resistance (Ω · cm) R: Measured resistance value (Ω) (applied voltage / current value) S: Cross-sectional area of main electrode (cm 2 ) t: Thickness of layer (cm )
【０００８】本発明を構成するトナー母粒子は、結着樹
脂，着色剤，電荷制御剤及び必要に応じてその他の添加
物を所望の配合に混合し、溶融混練した後、冷却、固化
後粉砕分級して得られる。上記の結着樹脂としては、ス
チレン樹脂，ポリアクリル酸エステル樹脂，スチレン−
アクリル酸エステル共重合体樹脂，ポリ塩化ビニル，ポ
リ酢酸ビニル，ポリ塩化ビニリデン，フェノール樹脂，
エポキシ樹脂，ポリエステル樹脂等が挙げられる。ま
た、着色剤としては、カーボンブラック，モノアゾ系赤
色顔料，ジスアゾ系黄色顔料，キナクリドン系マゼンタ
顔料，アントラキノン染料等が挙げられ、電荷制御剤と
しては、ニグロシン系染料，第４級アンモニウム塩，モ
ノアゾ系の金属錯塩染料等が挙げられる。その他必要に
応じて添加される添加物としては、ポリプロピレン等の
ポリオレフィン類，疎水性シリカやコロイダルシリカ等
の流動化剤が挙げられる。The toner mother particles constituting the present invention are obtained by mixing a binder resin, a colorant, a charge control agent and, if necessary, other additives in a desired composition, melt-kneading, cooling, solidifying and pulverizing. Obtained by classifying. Examples of the binder resin include styrene resin, polyacrylic acid ester resin, styrene-
Acrylic ester copolymer resin, polyvinyl chloride, polyvinyl acetate, polyvinylidene chloride, phenol resin,
Examples thereof include epoxy resin and polyester resin. Examples of colorants include carbon black, monoazo red pigments, disazo yellow pigments, quinacridone magenta pigments, anthraquinone dyes, and the like, and charge control agents include nigrosine dyes, quaternary ammonium salts, monoazo dyes. And metal complex salt dyes of Other additives that may be added as required include polyolefins such as polypropylene and fluidizing agents such as hydrophobic silica and colloidal silica.
【０００９】トナー母粒子の表面に、アンチモンをドー
プした酸化スズ微粉末あるいはアンチモンをドープした
酸化スズの導電膜を表面に形成させた酸化チタン微粉末
を付着させる手段としては、ヘンシェルミキサーやスー
パーミキサー等の攪拌器を用いトナー母粒子と前記微粉
末を攪拌混合すればよい。また、付着させる添加量とし
ては、両者ともトナー母粒子１００重量部に対して０．
０５〜５重量部であることが必要であり、０．０５重量
部より少ない場合はトナーの摩擦帯電量の上昇を抑える
効果がなく、５重量部を越えた場合は画質が低下する。As a means for adhering antimony-doped tin oxide fine powder or titanium oxide fine powder having antimony-doped tin oxide conductive film formed on the surface of the toner mother particles, a Henschel mixer or a super mixer is used. The toner mother particles and the fine powder may be stirred and mixed using a stirrer such as the above. Further, the addition amount to be adhered is both 0.
It is necessary that the amount is 05 to 5 parts by weight, and if it is less than 0.05 parts by weight, the effect of suppressing the increase in the triboelectric charge amount of the toner is not suppressed, and if it exceeds 5 parts by weight, the image quality deteriorates.
【００１０】[0010]
【実施例】以下、実施例に基づき本発明を説明する。な
お、実施例において部とは重量部を示す。 実施例１ 上記原料をスーパーミキサーで混合し、溶融混練後、粉
砕分級して平均粒子径が９μｍの負帯電性のトナー母体
粒子を得た。次に、該トナー母体粒子１００部に対して
アンチモンをドープした酸化スズ微粉末（三菱マテリア
ル社製 Ｔ−１、比抵抗０．１３Ω・ｃｍ）０．２部及
び疎水性シリカ（日本アエロジル社製Ｒ−９７２）０．
２部をヘンシェルミキサーによって表面に付着させ本発
明の電子写真用トナーを得た。EXAMPLES The present invention will be described below based on examples. In the examples, “part” means “part by weight”. Example 1 The above raw materials were mixed with a super mixer, melt-kneaded, and then pulverized and classified to obtain negatively chargeable toner base particles having an average particle diameter of 9 μm. Next, 0.2 parts of tin oxide fine powder (T-1, manufactured by Mitsubishi Materials Corp., specific resistance: 0.13 Ω · cm) and hydrophobic silica (manufactured by Nippon Aerosil Co., Ltd.) were added to 100 parts of the toner base particles. R-972) 0.
Two parts were adhered to the surface with a Henschel mixer to obtain the electrophotographic toner of the present invention.
【００１１】実施例２ 実施例１で作製したトナー母体粒子１００部に対してア
ンチモンをドープした酸化スズの導電膜を表面に形成さ
せた酸化チタン微粉末（三菱マテリアル社製Ｗ−１、比
抵抗０．７１Ω・ｃｍ）０．２部及び疎水性シリカ（日
本アエロジル社製Ｒ−９７２）０．２部をヘンシェルミ
キサーによって表面に付着させ本発明の電子写真用トナ
ーを得た。Example 2 A titanium oxide fine powder (W-1, manufactured by Mitsubishi Materials Corp., specific resistance) having a conductive film of tin oxide doped with antimony formed on the surface of 100 parts of the toner base particles prepared in Example 1 0.7 part of 0.71 Ω · cm and 0.2 part of hydrophobic silica (R-972 manufactured by Nippon Aerosil Co., Ltd.) were adhered to the surface by a Henschel mixer to obtain the electrophotographic toner of the present invention.
【００１２】実施例３ 上記原料をスーパーミキサーで混合し、溶融混練後、粉
砕分級して平均粒子径が１１μｍの正帯電性のトナー母
体粒子を得た。次に、該トナー母体粒子１００部に対し
てアンチモンをドープした酸化スズの導電膜を表面に形
成させた酸化チタン微粉末（三菱マテリアル社製 Ｗ−
１、比抵抗５．０Ω・ｃｍ、但し実施例２で使用した酸
化チタン微粉末とは製造ロットが異なる）０．４部及び
疎水性シリカ（ヘキスト社製 ＨＶＫ−２１１５）０．
４部をヘンシェルミキサーによって表面に付着させ本発
明の電子写真用トナーを得た。Embodiment 3 The above raw materials were mixed with a super mixer, melt-kneaded, and then pulverized and classified to obtain positively chargeable toner base particles having an average particle diameter of 11 μm. Next, a titanium oxide fine powder (W-manufactured by Mitsubishi Materials Co., Ltd.) having a conductive film of tin oxide doped with antimony formed on the surface of 100 parts of the toner base particles
1, a specific resistance of 5.0 Ω · cm, but 0.4 parts of a different production lot from the titanium oxide fine powder used in Example 2 and a hydrophobic silica (HVK-2115 manufactured by Hoechst).
Four parts were adhered to the surface by a Henschel mixer to obtain the electrophotographic toner of the present invention.
【００１３】比較例１ アンチモンをドープした酸化スズ微粉末をトナー母体粒
子の表面に付着させない他は実施例１と同様にして比較
用の電子写真用トナーを得た。Comparative Example 1 An electrophotographic toner for comparison was obtained in the same manner as in Example 1 except that the fine powder of tin oxide doped with antimony was not attached to the surface of the toner base particles.
【００１４】比較例２ アンチモンをドープした酸化スズの導電膜を表面に形成
させた酸化チタン微粉末をトナー母体粒子の表面に付着
させない他は実施例２と同様にして比較用の電子写真用
トナーを得た。Comparative Example 2 Comparative electrophotographic toner in the same manner as in Example 2 except that the titanium oxide fine powder having the antimony-doped tin oxide conductive film formed on the surface was not attached to the surface of the toner base particles. Got
【００１５】比較例３ アンチモンをドープした酸化スズの導電膜を表面に形成
させた酸化チタン微粉末をトナー母体粒子の表面に付着
させない他は実施例３と同様にして比較用の電子写真用
トナーを得た。Comparative Example 3 A comparative electrophotographic toner was prepared in the same manner as in Example 3 except that the titanium oxide fine powder having the antimony-doped tin oxide conductive film formed on the surface was not attached to the surface of the toner base particles. Got
【００１６】比較例４ アンチモンをドープした酸化スズ微粉末の付着量を７部
にした以外は実施例１と同様にして比較用の電子写真用
トナーを得た。該電子写真用トナー２．５部とシリコー
ンコートフェライトキャリア（パウダーテック社製 Ｆ
Ｌ９５−１００）１００部とを混合して現像剤を作成
し、市販の複写機（三田工業社製 ＤＣ−５５５５）で
コピー画像をとったところ、細線の再現が悪く、文字の
カスレや黒ベタのムラが発生し実用上耐えうる画像では
なかった。Comparative Example 4 A comparative electrophotographic toner was obtained in the same manner as in Example 1 except that the adhesion amount of antimony-doped tin oxide fine powder was changed to 7 parts. 2.5 parts of the electrophotographic toner and a silicone-coated ferrite carrier (F
L95-100) was mixed with 100 parts of the same to prepare a developer, and a copy image was taken with a commercially available copying machine (DC-5555 manufactured by Mita Kogyo Co., Ltd.). The resulting image was not even in practical use.
【００１７】次に実施例１、実施例２、比較例１及び比
較例２の各電子写真用トナー３部とシリコーンコートキ
ャリア（パウダーテック社製 Ｆ９３−１００）１００
部とを混合して現像剤を作製した。そして、これらの現
像剤を定速度回転装置にセットされた１００ｃｃのボト
ルに入れて回転させ、ボトル内の現像剤を攪拌して一定
時間ごとの摩擦帯電量（μｃ／ｇ）を東芝ケミカル社製
ブローオフ帯電量測定器によって測定した。その測定結
果を表１に示す。表１の結果から明らかなように本発明
の電子写真用トナーは６０分間現像剤を攪拌しても比較
例と比べて著しい摩擦帯電量の上昇はみられなく、本発
明の電子写真用トナーが、キャリアとの連続した摩擦の
過程で摩擦帯電量の蓄積を抑える効果が確認された。Next, 3 parts of each of the electrophotographic toners of Examples 1 and 2 and Comparative Examples 1 and 2 and a silicone-coated carrier (F93-100 manufactured by Powdertech Co., Ltd.) 100
And parts were mixed to prepare a developer. Then, these developers are put in a 100 cc bottle set in a constant speed rotation device and rotated, and the developers in the bottle are stirred to adjust the triboelectric charge amount (μc / g) at constant intervals by Toshiba Chemical Co. It was measured by a blow-off charge amount measuring device. The measurement results are shown in Table 1. As is clear from the results in Table 1, the electrophotographic toner of the present invention showed no remarkable increase in triboelectric charge amount as compared with the comparative example even when the developer was stirred for 60 minutes. It was confirmed that the effect of suppressing the accumulation of triboelectrification in the process of continuous friction with the carrier was suppressed.
【００１８】[0018]
【表１】 [Table 1]
【００１９】次に、実施例１及び比較例１の各電子写真
用トナー２．５部とシリコーンコートフェライトキャリ
ア（パウダーテック社製 ＦＬ９５−１００）１００部
とを混合して現像剤を作製し、市販の複写機（三田工業
社製 ＤＣ−５５５５）にてコピー試験を３００，００
０枚までおこなった結果を表２に示す。また、実施例３
及び比較例３の各電子写真用トナー２．８部とシリコー
ンコートフェライトキャリア（パウダーテック社製 Ｆ
Ｌ９６−１００）１００部とを混合して現像剤を作成
し、市販の複写機（シャープ社製 ＳＦ−８８００）に
てコピー試験を５０，０００枚までおこなった結果を表
３に示す。なお、表２及び表３において、摩擦帯電量は
東芝ケミカル社製ブローオフ帯電量測定器によって測定
し、画像濃度はマクベス反射濃度計、地カブリはハンタ
ー白色度計により測定した。表２及び表３の結果から明
らかなように本発明の電子写真用トナーは画像濃度が安
定しており、地カブリも少ないものであった。また、コ
ピー試験後のキャリアを電子顕微鏡において確認したと
ころ本発明の実施例１及び実施例３に使用したキャリア
はスペントトナーの発生が無かったが、比較例において
はスペントトナーが確認された。Next, 2.5 parts of each electrophotographic toner of Example 1 and Comparative Example 1 and 100 parts of silicone-coated ferrite carrier (FL95-100 manufactured by Powdertech Co., Ltd.) were mixed to prepare a developer. Copy test 300,00 with a commercially available copying machine (DC-5555 manufactured by Mita Kogyo Co., Ltd.)
Table 2 shows the results of performing up to 0 sheets. In addition, Example 3
And 2.8 parts of each electrophotographic toner of Comparative Example 3 and a silicone-coated ferrite carrier (F manufactured by Powder Tech Co., Ltd.
L96-100) is mixed with 100 parts of the developer to prepare a developer, and a copy test is conducted with a commercially available copying machine (SF-8800 manufactured by Sharp Corporation) up to 50,000 sheets. In Tables 2 and 3, the triboelectric charge amount was measured by a blow-off charge amount measuring device manufactured by Toshiba Chemical Co., the image density was measured by a Macbeth reflection densitometer, and the background fog was measured by a Hunter whiteness meter. As is clear from the results in Tables 2 and 3, the electrophotographic toner of the present invention had stable image density and little background fog. When the carrier after the copy test was confirmed with an electron microscope, the carrier used in Examples 1 and 3 of the present invention did not generate spent toner, but in the comparative example, spent toner was confirmed.
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【表３】 [Table 3]
【００２２】[0022]
【発明の効果】本発明は、特定の酸化スズ微粉末あるい
は酸化チタン微粉末をトナー母体粒子の表面に付着させ
たため、キャリアにスペントトナーが発生しないで、多
数枚の連続複写時に摩擦帯電量が上昇せず、地カブリが
少なく、十分な画像濃度を有する画像を得ることができ
る。According to the present invention, since the specific tin oxide fine powder or titanium oxide fine powder is adhered to the surface of the toner base particles, the spent toner is not generated on the carrier, and the triboelectric charge amount is increased during continuous copying of a large number of sheets. It is possible to obtain an image that does not rise, has little background fog, and has a sufficient image density.
【図面の簡単な説明】[Brief description of drawings]
【図１】図１は微粉末の比抵抗を測定する装置の略図で
ある。FIG. 1 is a schematic diagram of an apparatus for measuring the resistivity of fine powder.
１ 上部電極（Ｃｕ−Ｚｎ ａｌｌｏｙ） ２ 内筒（ＰＴＦＥ） ３ ベース（ＰＴＦＥ） ４ 主電極（Ｃｕ−Ｚｎ ａｌｌｏｙ） ５ 微粉末 1 Upper electrode (Cu-Zn alloy) 2 Inner cylinder (PTFE) 3 Base (PTFE) 4 Main electrode (Cu-Zn alloy) 5 Fine powder
Claims (2)
をドープした酸化スズ微粉末を、トナー母体粒子１００
重量部の表面に０．０５〜５重量部付着させてなること
を特徴とする電子写真用トナー。1. Toner base particles 100 are prepared by using antimony-doped tin oxide fine powder having a specific resistance of 10 Ω · cm or less.
An electrophotographic toner characterized in that 0.05 to 5 parts by weight of the toner is attached to the surface of the toner.
チモンをドープした酸化スズの導電膜を表面に形成させ
た酸化チタン微粉末を、トナー母体粒子１００重量部の
表面に０．０５〜５重量部付着させてなることを特徴と
する電子写真用トナー。2. A titanium oxide fine powder having a specific resistance of 50 Ω · cm or less and having a conductive film of tin oxide doped with antimony formed on the surface of 0.05 to 5 parts by weight of toner base particles. An electrophotographic toner characterized in that the toner is attached by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3308328A JPH05119516A (en) | 1991-10-29 | 1991-10-29 | Toner for electrophotography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3308328A JPH05119516A (en) | 1991-10-29 | 1991-10-29 | Toner for electrophotography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05119516A true JPH05119516A (en) | 1993-05-18 |
Family
ID=17979737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3308328A Pending JPH05119516A (en) | 1991-10-29 | 1991-10-29 | Toner for electrophotography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05119516A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06332232A (en) * | 1993-05-20 | 1994-12-02 | Tomoegawa Paper Co Ltd | Electrophotographic toner |
| US5614344A (en) * | 1994-06-14 | 1997-03-25 | Canon Kabushiki Kaisha | Toner for developing electrostatic images and image forming method |
| US6054241A (en) * | 1997-07-15 | 2000-04-25 | Fuji Xerox Co., Ltd. | Image forming method, image forming device, and electrostatic latent image developing agent |
| JP2003280287A (en) * | 2002-03-22 | 2003-10-02 | Ricoh Co Ltd | Electrostatic latent image developing carrier, electrostatic latent image developer and electrostatic latent image developing method using the carrier |
| JP2012008527A (en) * | 2010-05-27 | 2012-01-12 | Kyocera Mita Corp | Toner for developing electrostatic charge image, developer for developing electrostatic charge image and image forming device |
-
1991
- 1991-10-29 JP JP3308328A patent/JPH05119516A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06332232A (en) * | 1993-05-20 | 1994-12-02 | Tomoegawa Paper Co Ltd | Electrophotographic toner |
| US5614344A (en) * | 1994-06-14 | 1997-03-25 | Canon Kabushiki Kaisha | Toner for developing electrostatic images and image forming method |
| US6054241A (en) * | 1997-07-15 | 2000-04-25 | Fuji Xerox Co., Ltd. | Image forming method, image forming device, and electrostatic latent image developing agent |
| JP2003280287A (en) * | 2002-03-22 | 2003-10-02 | Ricoh Co Ltd | Electrostatic latent image developing carrier, electrostatic latent image developer and electrostatic latent image developing method using the carrier |
| JP2012008527A (en) * | 2010-05-27 | 2012-01-12 | Kyocera Mita Corp | Toner for developing electrostatic charge image, developer for developing electrostatic charge image and image forming device |
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