JPH04287051A - Nonmagnetic one-component toner - Google Patents
Nonmagnetic one-component tonerInfo
- Publication number
- JPH04287051A JPH04287051A JP3051872A JP5187291A JPH04287051A JP H04287051 A JPH04287051 A JP H04287051A JP 3051872 A JP3051872 A JP 3051872A JP 5187291 A JP5187291 A JP 5187291A JP H04287051 A JPH04287051 A JP H04287051A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- toner particles
- mixing chamber
- circumferential speed
- polyester resin
- 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
- 239000002245 particle Substances 0.000 claims abstract description 31
- 239000004645 polyester resin Substances 0.000 claims abstract description 19
- 229920001225 polyester resin Polymers 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 239000003086 colorant Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 15
- 238000003756 stirring Methods 0.000 abstract description 14
- 239000011248 coating agent Substances 0.000 abstract description 11
- 238000000576 coating method Methods 0.000 abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 229920000728 polyester Polymers 0.000 abstract 2
- 238000002407 reforming Methods 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 16
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 108091008695 photoreceptors Proteins 0.000 description 6
- 239000000975 dye Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000003607 modifier Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- OSNILPMOSNGHLC-UHFFFAOYSA-N 1-[4-methoxy-3-(piperidin-1-ylmethyl)phenyl]ethanone Chemical compound COC1=CC=C(C(C)=O)C=C1CN1CCCCC1 OSNILPMOSNGHLC-UHFFFAOYSA-N 0.000 description 1
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- MFYSUUPKMDJYPF-UHFFFAOYSA-N 2-[(4-methyl-2-nitrophenyl)diazenyl]-3-oxo-n-phenylbutanamide Chemical compound C=1C=CC=CC=1NC(=O)C(C(=O)C)N=NC1=CC=C(C)C=C1[N+]([O-])=O MFYSUUPKMDJYPF-UHFFFAOYSA-N 0.000 description 1
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 description 1
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- 235000010919 Copernicia prunifera Nutrition 0.000 description 1
- 244000180278 Copernicia prunifera Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 230000004931 aggregating 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
- 150000001408 amides Chemical class 0.000 description 1
- 239000000987 azo dye Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920003146 methacrylic ester copolymer Polymers 0.000 description 1
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- XOSXWYQMOYSSKB-LDKJGXKFSA-L water blue Chemical compound CC1=CC(/C(\C(C=C2)=CC=C2NC(C=C2)=CC=C2S([O-])(=O)=O)=C(\C=C2)/C=C/C\2=N\C(C=C2)=CC=C2S([O-])(=O)=O)=CC(S(O)(=O)=O)=C1N.[Na+].[Na+] XOSXWYQMOYSSKB-LDKJGXKFSA-L 0.000 description 1
Landscapes
- Developing Agents For Electrophotography (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、電子写真、静電印刷等
の手段において、静電荷像を可視像化するトナー、特に
非磁性一成分系トナーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner for visualizing an electrostatic charge image in electrophotography, electrostatic printing, etc., and particularly to a nonmagnetic one-component toner.
【０００２】0002
【従来の技術】従来、電子写真法、静電印刷法等におい
ては、種々の手段によって感光体の表面に静電荷像を形
成し、この静電荷像をトナーによって現像して可視的な
トナー像とし、このトナー像を普通紙等に転写した後定
着し、最終画像を得るのが通常である。[Prior Art] Conventionally, in electrophotography, electrostatic printing, etc., an electrostatic charge image is formed on the surface of a photoreceptor by various means, and this electrostatic charge image is developed with toner to produce a visible toner image. Usually, this toner image is transferred to plain paper or the like and then fixed to obtain a final image.
【０００３】次に静電荷像を現像する方法としては、磁
気ブラシ法が一般的であり、この磁気ブラシ法において
は、鉄粉若しくはフェライト粉末等のキャリアと、樹脂
および着色剤を主体とするトナーとの混合粉体である二
成分系現像剤を使用する方式が従来から多用されている
。しかしながら上記二成分系の現像剤を使用する場合に
おいては、トナーとキャリアとの混合比（トナー濃度）
を厳密に制御しないと画質が安定しないので、トナー濃
度の制御手段が必要であると共に、長時間の使用におい
てキャリアの表面がトナーによって汚染され、キャリア
の摩擦帯電能力が低下する等の欠点がある。[0003] Next, a general method for developing an electrostatic image is a magnetic brush method. In this magnetic brush method, a carrier such as iron powder or ferrite powder and a toner mainly composed of a resin and a colorant are used. Conventionally, a method using a two-component developer which is a powder mixture of However, when using the above two-component developer, the mixing ratio of toner and carrier (toner concentration)
Since the image quality will not be stable unless strictly controlled, a means of controlling the toner concentration is required, and there are also drawbacks such as the surface of the carrier becoming contaminated with toner during long-term use and the triboelectric charging ability of the carrier being reduced. .
【０００４】これらの欠点を解消するために、樹脂と磁
性粉とを主体とする磁性トナーを使用する一成分系現像
法が開発され、実用化されている。なおこの一成分系現
像法においては、良好な転写性を得るために絶縁性の磁
性トナーを使用することが多い（例えば特開昭５３−３
１１３６号公報参照）。また現像方法についても種々の
方法が提案されているが、トナー相互の摩擦若しくはト
ナーとスリーブ等との摩擦により、トナーを摩擦帯電さ
せる方法が多用されている。[0004] In order to eliminate these drawbacks, a one-component developing method using a magnetic toner mainly composed of resin and magnetic powder has been developed and put into practical use. In this one-component development method, insulating magnetic toner is often used to obtain good transferability (for example, as disclosed in Japanese Patent Laid-Open No. 53-3
(See Publication No. 1136). Also, various methods have been proposed for developing methods, but a method in which toner is triboelectrically charged by friction between toners or friction between toner and a sleeve or the like is often used.
【０００５】しかしながらトナーの摩擦帯電を利用する
現像法においては、トナーが凝集し易く、また環境条件
によって画質が変化し易いという欠点がある。更に磁性
トナーは例えばマグネタイト等の磁性粉を２０〜７０重
量％程度含有するため、前記二成分系現像剤より定着性
が劣るという欠点がある。However, the developing method that utilizes toner triboelectric charging has the drawback that the toner tends to aggregate and the image quality tends to change depending on environmental conditions. Furthermore, since the magnetic toner contains about 20 to 70% by weight of magnetic powder such as magnetite, it has a drawback that its fixing properties are inferior to those of the two-component developer.
【０００６】上記のような欠点を解消するものとして、
非磁性トナーのみからなる一成分系現像剤を使用する現
像装置も出現している。[0006] As a solution to the above-mentioned drawbacks,
Developing devices using a one-component developer consisting only of non-magnetic toner have also appeared.
【０００７】図１は非磁性一成分系現像装置の例を示す
要部説明図であり、本発明の対象とする現像装置である
。図１において、１は現像ロールであり、アルミニウム
若しくはステンレス鋼のような非磁性金属材料等により
円筒状に形成し、トナー２を収容するトナー槽３の下部
に回転自在に設けられている。４は可撓性材料からなる
ブレードであり、トナー槽３に固着されると共に、その
自由端が現像ロール１の表面と面接触し、かつ摺動係合
するように配設されている。なお現像ロール１にはバイ
アス電圧源５を接続すると共に、静電荷像を担持する感
光体６と若干の間隔を介して対向配設する。矢印は現像
ロール１および感光体６の回転方向を示している。FIG. 1 is an explanatory diagram of a main part of an example of a non-magnetic one-component type developing device, which is the developing device to which the present invention is applied. In FIG. 1, a developing roll 1 is formed into a cylindrical shape from a non-magnetic metal material such as aluminum or stainless steel, and is rotatably provided at the bottom of a toner tank 3 containing toner 2. Reference numeral 4 denotes a blade made of a flexible material, which is fixed to the toner tank 3 and disposed such that its free end is in surface contact with the surface of the developing roll 1 and slidably engaged therewith. A bias voltage source 5 is connected to the developing roll 1, and the developing roll 1 is disposed opposite to a photoreceptor 6, which carries an electrostatic image, with a slight distance therebetween. Arrows indicate the rotation direction of the developing roll 1 and the photoreceptor 6.
【０００８】上記の構成により、現像ロール１を矢印方
向に回転させると、トナー槽３内のトナー２はブレード
４によって所定の極性に帯電され、現像ロール１の表面
に静電力によって薄層を形成して付着し、感光体６に搬
送されるから、感光体６の表面に形成された静電荷像（
図示せず）を現像することができるのである。With the above configuration, when the developing roll 1 is rotated in the direction of the arrow, the toner 2 in the toner tank 3 is charged to a predetermined polarity by the blade 4, and a thin layer is formed on the surface of the developing roll 1 by electrostatic force. The electrostatic charge image formed on the surface of the photoreceptor 6 (
(not shown) can be developed.
【０００９】[0009]
【発明が解決しようとする課題】上記のような現像手段
において使用される非磁性一成分系のトナーは、結着用
樹脂と荷電制御剤と着色剤とからなるトナー粒子の表面
に、流動性改質剤として微粒のＳｉＯ２ を添加してい
るのが通常である。従って前記の現像ロール１とブレー
ド４とによるトナー２の摩擦帯電時において、荷電制御
剤が有効に作用するのであるが、荷電制御剤の含有量は
通常１〜５重量％に過ぎないため、トナー２全体が所定
の帯電量に到達するまでの時間が長いという問題点があ
る。このため特にトナー槽３内に新規のトナー２を補充
した際においては、帯電量が非飽和状態にあることから
、カブリが発生し易く、画質を低下させるという欠点が
ある。一方トナー２中の荷電制御剤の含有量を徒に増大
させることは、定着性およびオフセット性等を損なうた
め好ましくない。[Problems to be Solved by the Invention] The non-magnetic one-component toner used in the above-mentioned developing means has a fluidity modifier on the surface of the toner particles consisting of a binding resin, a charge control agent, and a colorant. Usually, fine grains of SiO2 are added as a quality agent. Therefore, the charge control agent acts effectively during the frictional charging of the toner 2 between the developing roll 1 and the blade 4, but since the content of the charge control agent is usually only 1 to 5% by weight, the toner There is a problem in that it takes a long time for the entire battery to reach a predetermined amount of charge. For this reason, particularly when the toner tank 3 is replenished with new toner 2, the amount of charge is in an unsaturated state, so fogging is likely to occur and image quality is degraded. On the other hand, unnecessarily increasing the content of the charge control agent in the toner 2 is undesirable because it impairs fixing properties, offset properties, and the like.
【００１０】また上記トナー２は、図１に示すトナー槽
３内に、例えばカートリッジを介して補充されるのであ
るが、同一のカートリッジ内に収容されたトナー２を使
用していても、画像濃度の差があり、一定の画像濃度を
有する画像を得ることが困難であるという問題点も併存
する。一方近年のこの種の分野における要求は益々厳し
くなってきており、より高品質の画像を形成することが
要請されており、従来の非磁性一成分系のトナーによっ
ては対応することが困難である。Further, the toner 2 is replenished into the toner tank 3 shown in FIG. There is also the problem that it is difficult to obtain an image having a constant image density. On the other hand, in recent years, demands in this type of field have become increasingly strict, requiring the formation of higher quality images, which is difficult to meet with conventional non-magnetic single-component toners. .
【００１１】本発明は上記従来技術に存在する問題点を
解決し、帯電量が飽和状態に到達するまでの時間、すな
わち帯電量の立上り時間が短く、カブリ発生が少ないと
共に、同一カートリッジ内のトナーにおける画像濃度の
差の少ない非磁性一成分系トナーを提供することを目的
とする。The present invention solves the problems existing in the above-mentioned prior art, and has a short time for the charge amount to reach a saturated state, that is, a rise time of the charge amount, which reduces fogging and reduces the amount of toner in the same cartridge. It is an object of the present invention to provide a non-magnetic one-component toner with little difference in image density.
【００１２】0012
【課題を解決するための手段】上記目的を達成するため
に、本発明においては、結着用樹脂、着色剤および荷電
制御剤を含有するトナー粒子の表面を、トナー粒子１０
０重量部当り ０．１〜 １．５重量部のポリエステル
樹脂によって被覆する、という技術的手段を採用した。Means for Solving the Problems In order to achieve the above object, in the present invention, the surface of toner particles containing a binding resin, a colorant, and a charge control agent is
The technical means of coating with 0.1 to 1.5 parts by weight of polyester resin per 0 parts by weight was adopted.
【００１３】本発明において、ポリエステル樹脂は負に
強く帯電する性質を持っているが、トナー粒子の表面を
被覆するポリエステル樹脂の量が、トナー粒子１００重
量部当り ０．１重量部未満では摩擦帯電能力向上の作
用が不充分であるため、トナー補給時におけるカブリの
発生を招来し易いので不都合である。一方上記ポリエス
テル樹脂の量が １．５重量部を超えると、トナー粒子
の表面に形成される被覆の層厚が不均一となり、画像濃
度の差が大となって画質を低下させるため好ましくない
。In the present invention, the polyester resin has the property of being strongly negatively charged, but if the amount of the polyester resin coating the surface of the toner particles is less than 0.1 part by weight per 100 parts by weight of the toner particles, frictional electrification occurs. Since the performance improvement effect is insufficient, fogging is likely to occur during toner replenishment, which is disadvantageous. On the other hand, if the amount of the polyester resin exceeds 1.5 parts by weight, the layer thickness of the coating formed on the surface of the toner particles will become non-uniform, and the difference in image density will increase, resulting in a decrease in image quality, which is not preferable.
【００１４】次にトナー粒子の表面にポリエステル樹脂
を被覆する手段としては、（ａ）流動状態としたトナー
粒子の表面にポリエステル樹脂をスプレーする手段と、
（ｂ）高速流動式撹拌装置（「スーパーミキサー」若し
くは「ヘンシェルミキサー」等の名称で市販されている
）にトナー粒子とポリエステル樹脂の溶液とを投入して
撹拌する手段とがあるが、均一な被覆が行える点におい
て、（ｂ）の手段によるのが好ましい。Next, the means for coating the surface of the toner particles with the polyester resin includes (a) means for spraying the polyester resin on the surface of the toner particles in a fluidized state;
(b) There is a method in which toner particles and a polyester resin solution are put into a high-speed fluid stirring device (commercially available under the names of "Super Mixer" or "Henschel Mixer") and stirred. It is preferable to use the method (b) in that the coating can be performed.
【００１５】すなわち、（ｂ）の手段においては、撹拌
装置を構成する混合槽内でトナー粒子とポリエステル樹
脂とを、高速で回転する撹拌羽根によって撹拌すること
により、混合槽内のすべてのトナー粒子を強制的に移動
させながらポリエステル樹脂と混合させる態様であるた
め、複数個のトナー粒子がポリエステル樹脂を介して集
合するという非所望な現象が起こることを防止し、均一
な被覆を得ることができるのである。That is, in the method (b), all the toner particles in the mixing tank are stirred by stirring blades rotating at high speed in the mixing tank constituting the stirring device. Since the toner particles are forcibly moved and mixed with the polyester resin, it is possible to prevent the undesirable phenomenon of multiple toner particles from aggregating through the polyester resin, and to obtain a uniform coating. It is.
【００１６】本発明において使用するトナー中に含有さ
せる結着用の樹脂としては、例えば、ポリスチレン、ス
チレン・ブタジェン共重合体、スチレン・アクリル酸エ
ステル共重合体、スチレン・メタクリル酸エステル共重
合体等のスチレン系樹脂、エポキシ樹脂、ポリエステル
樹脂等の公知のトナー用樹脂を単独若しくは混合して使
用することができる。[0016] Examples of the binding resin to be contained in the toner used in the present invention include polystyrene, styrene/butadiene copolymer, styrene/acrylic ester copolymer, styrene/methacrylic ester copolymer, and the like. Known toner resins such as styrene resins, epoxy resins, and polyester resins can be used alone or in combination.
【００１７】また着色剤としては、カーボンブラック、
クロムイエロー、ハンザイエロー、ベンチジンイエロー
、ローズベンガラ、アニリンレッド、フタロシアニンブ
ルー、アニリンブルー、ニグロシン染料、アニリンブラ
ック等の公知の顔料若しくは染料を使用することができ
る。なお含有量は３〜１０重量％が望ましい。[0017] As the coloring agent, carbon black,
Known pigments or dyes such as chrome yellow, Hansa yellow, benzidine yellow, rose red red, aniline red, phthalocyanine blue, aniline blue, nigrosine dye, and aniline black can be used. Note that the content is preferably 3 to 10% by weight.
【００１８】本発明のトナーは、結着樹脂および着色剤
と共に、荷電制御剤、離型剤、流動性改質剤、充填剤等
の他の添加物を含有することができる。荷電制御剤とし
ては、ニグロシン染料、ニグロシン染料とカルボキシル
基含有樹脂との反応物、トリフェニルメタン系染料、含
金属（Ｃｒ）アゾ染料等、離型剤としては、ポリプロピ
レン、ポリエチレン、パラフィンワックス、カルナバワ
ックス、アミドワックス等、流動性改質剤としては疎水
性シリカ、および充填剤としては、炭酸カルシウム、タ
ルク、クレイ等の無機微粉末が夫々挙げられる。上記の
添加物の含有量は、トナーに要求される特性に応じて適
宜選定されるが、一般に荷電制御剤が１〜５重量％、離
型剤が１〜５重量％、流動性改質剤が０．５〜５重量％
および充填剤が１〜１０重量％であるのが通常である。The toner of the present invention may contain other additives such as a charge control agent, a mold release agent, a fluidity modifier, and a filler in addition to the binder resin and colorant. Charge control agents include nigrosine dyes, reaction products of nigrosine dyes and carboxyl group-containing resins, triphenylmethane dyes, metal-containing (Cr) azo dyes, etc. Release agents include polypropylene, polyethylene, paraffin wax, carnauba, etc. Examples of the fluidity modifier include wax and amide wax, hydrophobic silica, and fillers include inorganic fine powders such as calcium carbonate, talc, and clay. The content of the above additives is appropriately selected depending on the properties required of the toner, but generally the charge control agent is 1 to 5% by weight, the release agent is 1 to 5% by weight, and the fluidity modifier is 1 to 5% by weight. is 0.5-5% by weight
and filler is usually 1 to 10% by weight.
【００１９】本発明のトナーは、粉砕法、スプレードラ
イ法等の公知の手段によって製造することができる。粉
砕法による場合には、夫々の原料をボールミル、乾式ミ
キサー等によって予備混合し、ニーダ、ロール等により
加熱混練し、冷却固化後ジェットミル等で粉砕し、次い
で分級することにより得られる。なおトナーの平均粒径
は、画質の点から５〜２０μｍの範囲がよい。The toner of the present invention can be produced by known means such as a pulverization method and a spray drying method. In the case of the pulverization method, the raw materials are premixed using a ball mill, dry mixer, etc., heated and kneaded using a kneader, rolls, etc., cooled and solidified, then pulverized using a jet mill, etc., and then classified. Note that the average particle diameter of the toner is preferably in the range of 5 to 20 μm from the viewpoint of image quality.
【００２０】[0020]
【作用】上記の構成により、帯電量立上り時間の短縮お
よびカブリ発生の抑制と共に、画像濃度の差を小にする
ことができるのである。[Operation] With the above structure, it is possible to shorten the charging amount rise time, suppress the occurrence of fog, and reduce the difference in image density.
【００２１】[0021]
【実施例】まずスチレン−アクリル系共重合体（三洋化
成製 ハイマーＳＢＭ６００）７７重量部、カーボン
ブラック（三菱化成製 ＃５０）１０重量部、低分子
量ポリプロピレン（三洋化成製 ビスコール５５０Ｐ
）３重量部、荷電制御剤（オリエント化学製 ボント
ロンＥ８１）２重量部およびＣａＣＯ３ （日東粉化工
業製ＮＳ＃２５００）８重量部をボールミルにより乾式
混合し、ニーダにより加熱混合し、冷却固化後ジェット
ミルで粉砕し、分級を行って５〜２５μｍの粒度を有す
るトナーを作製した。[Example] First, 77 parts by weight of styrene-acrylic copolymer (Himer SBM600 manufactured by Sanyo Chemical), 10 parts by weight of carbon black (#50 manufactured by Mitsubishi Chemical), and low molecular weight polypropylene (Viscol 550P manufactured by Sanyo Chemical)
), 2 parts by weight of a charge control agent (Bontron E81 manufactured by Orient Chemical Co., Ltd.), and 8 parts by weight of CaCO3 (NS#2500 manufactured by Nitto Funka Kogyo Co., Ltd.) were dry mixed in a ball mill, heated and mixed in a kneader, and after cooling and solidifying were jet-mixed. The toner was ground with a mill and classified to produce a toner having a particle size of 5 to 25 μm.
【００２２】次に上記のようにして作製したトナー粒子
の表面にポリエステル樹脂を被覆するのであるが、この
被覆作業に使用する高速流動式撹拌装置の例について記
述する。Next, the surfaces of the toner particles produced as described above are coated with a polyester resin, and an example of a high-speed fluid stirring device used for this coating operation will be described.
【００２３】図２は本発明の実施例における高速流動式
撹拌装置の例を示す要部縦断面図である。図２において
、１１は混合槽であり、有底中空円筒状に形成し、上部
開口には蓋１２が開閉自在に設けられてある。なお混合
槽１１の側壁には加熱用のヒータ１３が設けられ、収容
物の加熱に供される。また混合槽１１の底部近傍には、
排出用のダンパ１４が設けられ、シリンダ１５によって
駆動されるようになっている。なお混合槽１１には排気
ポンプおよび真空ポンプ（何れも図示せず）が接続され
ている。FIG. 2 is a longitudinal cross-sectional view of a main part showing an example of a high-speed fluid stirring device according to an embodiment of the present invention. In FIG. 2, reference numeral 11 denotes a mixing tank, which is formed into a hollow cylindrical shape with a bottom, and a lid 12 is provided at the upper opening so that it can be opened and closed. A heater 13 is provided on the side wall of the mixing tank 11 to heat the contents. In addition, near the bottom of the mixing tank 11,
A damper 14 for discharge is provided and is driven by a cylinder 15. Note that an exhaust pump and a vacuum pump (both not shown) are connected to the mixing tank 11.
【００２４】次に１６は回転軸であり、モータ（図示せ
ず）により回転するように構成されると共に、回転軸１
６の上端部には撹拌羽根１７が設けられている。撹拌羽
根１７は図２から明らかなように、所謂Ｚ型に形成され
ている。すなわち回転軸に固着されたボス１８から直径
方向に張り出す少なくとも２個の基部１９と、この基部
１９の外端部から斜上方に向かう傾斜部２０と、更に傾
斜部２０の外端部から直径方向に張り出す先端部２１と
が一体に形成されている。Next, reference numeral 16 denotes a rotating shaft, which is configured to be rotated by a motor (not shown), and which is rotated by a motor (not shown).
A stirring blade 17 is provided at the upper end of the stirrer 6 . As is clear from FIG. 2, the stirring blade 17 is formed in a so-called Z shape. That is, at least two base parts 19 projecting in the diametrical direction from the boss 18 fixed to the rotating shaft, an inclined part 20 extending obliquely upward from the outer end of the base part 19, and a diametrically extending part 20 extending diagonally upward from the outer end of the inclined part 20. A distal end portion 21 protruding in the direction is integrally formed.
【００２５】上記構成の高速流動式撹拌装置を使用し、
混合槽１１内に前記のようにして作製したトナー粒子１
００重量部と、表１に示す外添量となるような配合のポ
リエステル樹脂（花王製 ＫＴＲ２１５０）の溶液（
樹脂分６０重量％）とを投入する。蓋１２を閉じて撹拌
羽根１７の周速を１５ｍ／秒とし、１０分間の撹拌によ
り、トナー粒子の表面にポリエステル樹脂を被覆した。
次に混合槽１１をヒータ１３によって約６０℃に加熱し
、撹拌羽根１７の周速１０ｍ／秒で１０分間撹拌し、こ
の間混合槽１１内を排気ポンプ（図示せず）により脱気
した。その後加熱を終了させ、混合槽１１内を真空ポン
プで減圧して脱気した。脱気後排出用ダンパ１４を開い
てトナー粒子を取り出す。次に流動性改質剤としてＳｉ
Ｏ２ （日本アエロジル社製 Ｒ９７２）を ０．２
重量部外添して、非磁性一成分系現像剤であるトナー粒
子とした。このトナー粒子の特性を測定した結果を表１
に示す。[0025] Using the high-speed fluid stirring device having the above configuration,
Toner particles 1 prepared as described above are placed in the mixing tank 11.
00 parts by weight and a solution of polyester resin (KTR2150 manufactured by Kao) with the external addition amount shown in Table 1 (
(resin content: 60% by weight). The lid 12 was closed, the peripheral speed of the stirring blade 17 was set to 15 m/sec, and the polyester resin was coated on the surface of the toner particles by stirring for 10 minutes. Next, the mixing tank 11 was heated to about 60° C. by the heater 13 and stirred for 10 minutes at a circumferential speed of 10 m/sec with the stirring blade 17, during which time the inside of the mixing tank 11 was degassed by an exhaust pump (not shown). Thereafter, heating was terminated, and the inside of the mixing tank 11 was depressurized and degassed using a vacuum pump. After degassing, the discharge damper 14 is opened to take out the toner particles. Next, Si was used as a fluidity modifier.
O2 (R972 manufactured by Nippon Aerosil Co., Ltd.) 0.2
The weight part was added externally to form toner particles which are non-magnetic one-component developer. Table 1 shows the results of measuring the characteristics of this toner particle.
Shown below.
【００２６】[0026]
【表１】[Table 1]
【００２７】表１において帯電量は、キャリア（日立金
属製 ＫＢＮ１００フェライトキャリア、７４〜１４
９μｍ）に対し、各々のトナー濃度を５重量％とし、ブ
ローオフ法（東芝ケミカル社製 ＴＢ−２００型使用
）により測定したものであり、最大帯電量はブローオフ
時間３０秒間の最大値を示し、立上り時間は帯電量が最
大値に達するまでの時間の１／２と規定した。[0027] In Table 1, the charge amount is determined by the carrier (Hitachi Metals KBN100 ferrite carrier, 74-14
9 μm), each toner concentration was 5% by weight, and was measured by the blow-off method (using Toshiba Chemical TB-200 model), and the maximum charge amount was the maximum value during the blow-off time of 30 seconds, and The time was defined as 1/2 of the time required for the amount of charge to reach its maximum value.
【００２８】上記非磁性一成分系現像剤を使用し、前記
図１に示す現像装置によりＯＰＣからなる感光体６上に
形成された静電荷像を反転現像し、得られた可視像を普
通紙上に転写した後、ヒートロール定着（定着温度１６
５℃、定着圧力１ｋｇ／ｃｍ２ ）を行って得た画像を
評価した結果を表１に併記する。Using the above-mentioned non-magnetic one-component developer, the electrostatic charge image formed on the photoreceptor 6 made of OPC is reversely developed by the developing device shown in FIG. After transferring onto paper, heat roll fixing (fixing temperature 16
Table 1 also shows the results of evaluating images obtained by fixing at 5° C. and fixing pressure of 1 kg/cm 2 ).
【００２９】なお上記現像に際しては、図１に示す感光
体６を周速５０ｍｍ／秒で回転させ、現像ロール１を周
速１２５ｍｍ／秒で回転させ、現像ロール１の表面の現
像剤の薄層の厚さを０．１ｍｍとし、コンタクト現像と
した。また現像ロール１には直流−４５０Ｖのバイアス
電圧を印加した。In the above-mentioned development, the photoreceptor 6 shown in FIG. The thickness of the film was set to 0.1 mm, and contact development was performed. Further, a bias voltage of -450 V DC was applied to the developing roll 1.
【００３０】表１から明らかなように、Ｎｏ．１はポリ
エステル樹脂の外添を欠如する従来のものであり、最大
帯電量が小であると共に、立上り時間が長く、かつトナ
ー補給時のカブリの発生が認められた。一方Ｎｏ．５に
おいては、最大帯電量が大であり、かつ立上り時間も短
いものの、ポリエステル樹脂の外添による被覆が多いた
め、トナー粒子表面の被覆厚さが不均一となる結果、画
像濃度の差が大きくなることが認められた。これに対し
てＮｏ．２〜４においては、トナー粒子の表面に負帯電
特性の高いポリエステル樹脂の被覆を形成したものであ
るため、最大帯電量が大であり、立上り時間も短く、か
つカブリがなく、画像濃度の差が小である、高品質の画
像が得られている。As is clear from Table 1, No. No. 1 is a conventional product lacking external addition of polyester resin, and the maximum charge amount was small, the rise time was long, and fogging was observed during toner replenishment. On the other hand, No. In No. 5, the maximum charge amount is large and the rise time is short, but since there is a large amount of externally added polyester resin coating, the coating thickness on the toner particle surface becomes uneven, resulting in a large difference in image density. It was accepted that this would happen. On the other hand, No. In Nos. 2 to 4, a coating of polyester resin with high negative charging characteristics is formed on the surface of the toner particles, so the maximum charge amount is large, the rise time is short, there is no fog, and there is no difference in image density. A high-quality image with a small amount of image data is obtained.
【００３１】[0031]
【発明の効果】本発明は以上記述のような構成および作
用であるから、帯電量が飽和状態に到達するまでの所謂
立上り時間を短縮することができ、トナー補給時におけ
るカブリを防止し、かつ画像濃度の差の少ない高品質の
画像を得ることができるという効果がある。[Effects of the Invention] Since the present invention has the structure and operation as described above, it is possible to shorten the so-called rise time until the amount of charge reaches a saturated state, prevent fogging during toner replenishment, and This has the effect of being able to obtain high quality images with little difference in image density.
【図１】非磁性一成分系のトナーを使用する現像装置の
例を示す要部説明図である。FIG. 1 is an explanatory view of the main parts of an example of a developing device that uses non-magnetic one-component toner.
【図２】本発明の実施例における高速流動式撹拌装置の
例を示す要部縦断面図である。FIG. 2 is a vertical sectional view of a main part showing an example of a high-speed fluid stirring device in an embodiment of the present invention.
１ 現像ロール ２ トナー 1 Developing roll 2 Toner
Claims (1)
を含有するトナー粒子の表面を、トナー粒子１００重量
部当り ０．１〜 １．５重量部のポリエステル樹脂に
よって被覆したことを特徴とする非磁性一成分系トナー
。1. The surface of toner particles containing a binding resin, a colorant, and a charge control agent is coated with 0.1 to 1.5 parts by weight of a polyester resin per 100 parts by weight of toner particles. Non-magnetic one-component toner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3051872A JPH04287051A (en) | 1991-03-18 | 1991-03-18 | Nonmagnetic one-component toner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3051872A JPH04287051A (en) | 1991-03-18 | 1991-03-18 | Nonmagnetic one-component toner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04287051A true JPH04287051A (en) | 1992-10-12 |
Family
ID=12898976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3051872A Pending JPH04287051A (en) | 1991-03-18 | 1991-03-18 | Nonmagnetic one-component toner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04287051A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5529876A (en) * | 1992-09-01 | 1996-06-25 | Kao Corporation | Encapsulated toner for heat - and pressure - fixing and method for production thereof |
| EP0616263B1 (en) * | 1993-03-15 | 1997-12-29 | Kao Corporation | Method for development using nonmagnetic one-component toner |
| JP2010055019A (en) * | 2008-08-29 | 2010-03-11 | Sanyo Chem Ind Ltd | Toner composition |
-
1991
- 1991-03-18 JP JP3051872A patent/JPH04287051A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5529876A (en) * | 1992-09-01 | 1996-06-25 | Kao Corporation | Encapsulated toner for heat - and pressure - fixing and method for production thereof |
| US5763130A (en) * | 1992-09-01 | 1998-06-09 | Kao Corporation | Encapsulated toner for heat-and-pressure fixing and method for production thereof |
| EP0616263B1 (en) * | 1993-03-15 | 1997-12-29 | Kao Corporation | Method for development using nonmagnetic one-component toner |
| JP2010055019A (en) * | 2008-08-29 | 2010-03-11 | Sanyo Chem Ind Ltd | Toner composition |
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