JPH0136936B2 - - Google Patents
Info
- Publication number
- JPH0136936B2 JPH0136936B2 JP57049202A JP4920282A JPH0136936B2 JP H0136936 B2 JPH0136936 B2 JP H0136936B2 JP 57049202 A JP57049202 A JP 57049202A JP 4920282 A JP4920282 A JP 4920282A JP H0136936 B2 JPH0136936 B2 JP H0136936B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- carrier
- developer
- epoxy resin
- bisphenol
- 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.)
- Expired
Links
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical group C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 20
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000000295 emission spectrum Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 235000007173 Abies balsamea Nutrition 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241000531908 Aramides Species 0.000 description 1
- 239000004857 Balsam Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 244000018716 Impatiens biflora Species 0.000 description 1
- 229910000708 MFe2O4 Inorganic materials 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229940090961 chromium dioxide Drugs 0.000 description 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/0802—Preparation methods
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/0802—Preparation methods
- G03G9/081—Preparation methods by mixing the toner components in a liquefied state; melt kneading; reactive mixing
Description
【発明の詳細な説明】
本発明はフラツシユ定着用現像剤に関し、さら
に詳しくは、フラツシユ光による定着方式を採用
している電子写真プリンタ、それも特に高速プリ
ンタに好適な２成分系乾式現像剤に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developer for flash fixing, and more particularly to a two-component dry developer suitable for electrophotographic printers that employ a fixing method using flash light, particularly for high-speed printers. .
電子写真プリンタにおいて、転写媒体上のトナ
ーを定着する方式のひとつにフラツシユ光による
ものがある。この方式は、転写媒体上のトナー像
にクセノンあるいはハロゲンガスの発光スペクト
ルを0.1〜１（ミリ秒）という非常に短い時間照射
し、200〜300（ジユール）の熱量を与えることに
よつてトナーを転写媒体上に定着するものであ
る。 In electrophotographic printers, one method for fixing toner on a transfer medium is to use flash light. This method irradiates the toner image on the transfer medium with the emission spectrum of xenon or halogen gas for a very short period of 0.1 to 1 millisecond (millisecond), and applies a heat amount of 200 to 300 joules to remove the toner. It is fixed onto a transfer medium.
上記のような、いわゆるフラツシユ定着方式に
おいて使用する現像剤としては、従来、Ａ−ステ
ージ状態のビスフエノールＡ系エポキシ樹脂から
なるトナーと、キヤリアとの混合物からなるよう
なものが知られている。トナーをＡ−ステージ状
態のビスフエノールＡ系エポキシ樹脂で構成して
いるのは、そのようなトナーは200〜300（ジユー
ル）程度の熱量で容易に軟化するので定着が極め
て容易に行えること、およびクセノンやハロゲン
ガスの発光スペクトルを照射しても分解せず、有
毒ガスやいやな臭を発生しないからである。しか
しながら、かかる従来の現像剤は、寿命が短いと
いう欠点があつた。 As a developer used in the above-mentioned so-called flash fixing system, a developer made of a mixture of a toner made of an A-stage bisphenol A-based epoxy resin and a carrier is known. The reason why the toner is made of A-stage bisphenol A-based epoxy resin is that such a toner is easily softened by a heat amount of about 200 to 300 joules, so it can be fixed very easily. This is because it does not decompose even when irradiated with the emission spectrum of xenon or halogen gas, and does not generate toxic gas or unpleasant odors. However, such conventional developers have the disadvantage of short lifespan.
すなわち、電子写真プリンタにおいては、転写
に先立つて、静電潜像形成媒体上の静電潜像にト
ナーを引き付ける、いわゆるトナー現像を行う
が、このトナー現像は、トナーとキヤリアとの摩
擦によつて生ずる静電気の力を利用するから、ト
ナーとキヤリアとをよく摩擦させなければならな
い。しかるに、上記従来の現像剤は、トナーをＡ
−ステージ状態のビスフエノールＡ系エポキシ樹
脂で構成しているので、トナーは比較的柔く、し
かも高い粘着性をもつており、そのためキヤリア
と摩擦するとその表面にくつつきやすく、キヤリ
アの表面が汚れやすいのである。このトナーによ
るキヤリアの汚れ、つまり現像剤の劣化は、プリ
ント速度が低い場合にはそれほど問題にはならな
いが、A4判で30枚／分以上であるような高速プ
リントになるとトナーとキヤリアとが激しくぶつ
かり合うようになり、キヤリア表面の汚れが急速
に進行して現像剤の寿命は大幅に短くなつてしま
う。 That is, in electrophotographic printers, prior to transfer, so-called toner development is performed in which toner is attracted to the electrostatic latent image on the electrostatic latent image forming medium, but this toner development is caused by friction between the toner and the carrier. Since the electrostatic force generated by the toner is used, good friction between the toner and the carrier is required. However, the conventional developer described above converts toner into A
- Since the toner is composed of bisphenol A-based epoxy resin in a stage state, it is relatively soft and has high stickiness. Therefore, when it rubs against the carrier, it tends to stick to the surface, resulting in dirt on the surface of the carrier. It's easy. This contamination of the carrier by toner, or deterioration of the developer, is not so much of a problem at low print speeds, but when printing at high speeds of 30 pages per minute or more for A4 size, the toner and carrier are severely contaminated. They collide with each other, and the carrier surface becomes rapidly contaminated, significantly shortening the lifespan of the developer.
本発明の目的は、従来の現像剤の上記欠点を解
決し、トナーによるキヤリア表面の汚れの進行を
非常に遅くすることができ、長寿命であるフラツ
シユ定着用現像剤を提供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a flash fixing developer which can solve the above-mentioned drawbacks of conventional developers, can significantly slow down the progress of contamination of the carrier surface by toner, and has a long life.
上記目的を達成するための本発明は、Ｂ−ステ
ージ状態のビスフエノールＡ系エポキシ樹脂を主
成分とするトナーと、比表面積が100cm2／ｇ以上
である磁性キヤリアとの混合物からなるフラツシ
ユ定着用現像剤を特徴とするものである。 To achieve the above object, the present invention provides a flash fixing toner comprising a toner mainly composed of a bisphenol A epoxy resin in a B-stage state and a magnetic carrier having a specific surface area of 100 cm 2 /g or more. It is characterized by a developer.
次に、本発明のフラツシユ定着用現像剤（以
下、現像剤という）を詳細に説明する。 Next, the flash fixing developer (hereinafter referred to as developer) of the present invention will be explained in detail.
本発明の現像剤は、トナーとキヤリアとの混合
物からなる。トナーとキヤリアとの混合比率は、
重量比で0.5：99.5から50：50の範囲である。こ
の現像剤は、トナーとキヤリアとが摩擦し合うこ
とにより、トナーに一定の極性の電荷を保持する
ことができるものである。 The developer of the present invention consists of a mixture of toner and carrier. The mixing ratio of toner and carrier is
The weight ratio ranges from 0.5:99.5 to 50:50. This developer is capable of holding a constant polar charge on the toner by friction between the toner and the carrier.
トナーは、Ｂ−ステージ状態のビスフエノール
Ａ系エポキシ樹脂を主成分、すなわち結着樹脂と
し、これにカーボンブラツクや炭酸カルシウムな
どの顔料および／またはニグロシンや有機錯体な
どの染料を混入してなるもので、５〜30（ミクロ
ン）の平均粒子径を有している。上記結着樹脂
が、トナーに通常使用されている他の樹脂、たと
えばビニル樹脂、アクリル樹脂、オレフイン樹脂
などの合成樹脂や、バルサム、ロジン、シエラツ
クなどの天然樹脂を含んでいてもよいが、その場
合でも少なくとも50重量％以上、好ましくは80重
量％以上がＢ−ステージ状態のビスフエノールＡ
系エポキシ樹脂である必要がある。そして、上記
ビスフエノールＡ系エポキシ樹脂は、Ｂ−ステー
ジ状態であるために、Ａ−ステージ状態のときに
くらべて少なくとも２℃、好ましくは５℃以上高
い２次転移点をもつている。 The toner has a B-stage bisphenol A-based epoxy resin as its main component, that is, a binder resin, and is made by mixing pigments such as carbon black and calcium carbonate and/or dyes such as nigrosine and organic complexes. It has an average particle diameter of 5 to 30 (microns). The binder resin may contain other resins commonly used in toners, such as synthetic resins such as vinyl resin, acrylic resin, and olefin resin, and natural resins such as balsam, rosin, and silica resin. At least 50% by weight or more, preferably 80% by weight or more of bisphenol A is in the B-stage state.
It needs to be a type epoxy resin. Since the bisphenol A-based epoxy resin is in the B-stage state, it has a secondary transition point that is at least 2° C., preferably 5° C. or more higher than that in the A-stage state.
キヤリアは、鉄、マンガン、コバルト、ニツケ
ル、クロムなどの金属や、二酸化クロム、三二酸
化鉄、四三酸化鉄などの金属酸化鉄、MFe2O4
（ただし、ＭはMn，Co，Ni，Mg，Zn，Cd）で
表されるフエライトのような磁性材料からなり、
10〜300（μ）の平均粒子径を有している。金属材
料で構成されたキヤリアにおいては、その酸化を
防止するための酸化物被膜が施されていてもよ
い。また、上記酸化物被膜の上に、抵抗値の変動
を防止したり、あるいは帯電特性を制御する目的
の、トナーとは異なる合成樹脂（たとえば、四弗
化エチレン樹脂、アクリル樹脂など）からなる被
膜がさらに施されていてもよい。 Carriers can be used to remove metals such as iron, manganese, cobalt, nickel, and chromium, as well as metallic iron oxides such as chromium dioxide, iron sesquioxide, and triiron tetroxide, and MFe2O4 .
(However, M is made of magnetic material such as ferrite represented by Mn, Co, Ni, Mg, Zn, Cd),
It has an average particle size of 10 to 300 (μ). A carrier made of a metal material may be coated with an oxide film to prevent its oxidation. Additionally, on the oxide film, a film made of a synthetic resin different from that of the toner (e.g., tetrafluoroethylene resin, acrylic resin, etc.) is added for the purpose of preventing fluctuations in resistance value or controlling charging characteristics. may be further applied.
上記のようなキヤリアは、汚れの場を大きくす
ることができるように、比表面積が100cm2／ｇ以
上のものでなければならない。また、5.5×10-2
以上8.0×10-2未満の形状係数を有しているのが
好ましい。さらに好ましい比表面積は、150cm2／
ｇ以上である。すなわち、現像剤の寿命は、現像
とともに消費されるトナーは絶えず補給されるか
ら、しかるところキヤリアの寿命、つまりキヤリ
アの表面がトナーによつて汚しつくされるまでの
時間ということになるが、キヤリアの寿命を延長
するためには、トナーによつて汚すことができる
場を大きくしてやるか、汚れを加速するような形
状を避けなければよいということになる。前者の
ためには、キヤリアの比表面積を大きくすればよ
い。また、後者については、キヤリアを角の少な
い形状にしてやればよく、そのためには完全な球
状が最もよいのであるが、完全な球状では粒子径
をかなり小さくしないと比表面積を大きくとれ
ず、かえつて寿命を短くすることになる。また、
完全な球状で、かつ粒子径の小さいキヤリアは、
磁気力が小さいのでトナー現像の際に磁気ロール
上から容易に飛散してしまうという問題もある。
したがつて、キヤリアは完全な球状でもなく、か
といつて極端に角の多い形状でもない、形状係数
が5.5×10-2以上8.0×10-2未満であるようなもの
であるのが好ましいわけである。 The carrier as described above must have a specific surface area of 100 cm 2 /g or more so that the soiling field can be enlarged. Also, 5.5×10 -2
It is preferable to have a shape factor of at least 8.0×10 −2 or less. A more preferable specific surface area is 150cm 2 /
g or more. In other words, since the toner consumed during development is constantly replenished, the lifespan of the developer is equivalent to the lifespan of the carrier, that is, the time until the surface of the carrier is completely contaminated with toner. In order to extend the life of the toner, it is necessary to increase the area that can be contaminated by toner, or to avoid shapes that accelerate contamination. For the former, it is sufficient to increase the specific surface area of the carrier. Regarding the latter, it is sufficient to make the carrier into a shape with few corners, and a perfect spherical shape is best for this purpose, but with a perfect spherical shape, the specific surface area cannot be increased unless the particle diameter is considerably reduced, and on the contrary, It will shorten the lifespan. Also,
The carrier is perfectly spherical and has a small particle size.
Since the magnetic force is small, there is also the problem that the toner easily scatters from the magnetic roll during toner development.
Therefore, it is preferable that the carrier is neither perfectly spherical nor extremely angular, and has a shape factor of 5.5×10 -2 or more and less than 8.0×10 -2 . It is.
上記において、形状係数とは、１個１個に分離
したキヤリアを投影してみた場合の投影面積をそ
の投影周囲長さの自乗で除したものとして定義さ
れ、上記5.5×10-2以上8.0×10-2未満という値は、
多数のキヤリアについての単純平均値である。 In the above, the shape factor is defined as the projected area of each separated carrier divided by the square of its projected perimeter, which is 5.5×10 -2 or more and 8.0× A value less than 10 -2 means
This is a simple average value for many carriers.
上述したような本発明の現像剤は、たとえば次
のようにして製造することができる。 The developer of the present invention as described above can be produced, for example, as follows.
すなわち、溶融したＡ−ステージ状態のビスフ
エノールＡ系エポキシ樹脂と適当な顔料および／
または染料とを所望の割合で混合し、よく混練
し、室温にもどして粗粉砕する。さらにこれを再
溶融して混練し、室温までもどして粗粉砕する。
かかる操作を数回繰り返し行うと、ビスフエノー
ルＡ系エポキシ樹脂がＡ−ステージ状態からＢ−
ステージ状態に変わる。 That is, a molten A-stage bisphenol A epoxy resin, a suitable pigment and/or
Alternatively, it is mixed with a dye in a desired ratio, kneaded well, returned to room temperature, and coarsely ground. Further, this is melted again, kneaded, returned to room temperature, and coarsely ground.
By repeating this operation several times, the bisphenol A-based epoxy resin changes from the A-stage state to the B-stage state.
Change to stage state.
次に、上記粗粉砕したものを微粉砕し、風力分
級して平均粒子径が５〜30（μ）であるようなト
ナーを得る。 Next, the coarsely pulverized product is pulverized and classified by air to obtain a toner having an average particle size of 5 to 30 (μ).
次に、上記トナーと適当なキヤリアとを所望の
割合で混合し、本発明の現像剤を得る。 Next, the above toner and a suitable carrier are mixed in a desired ratio to obtain the developer of the present invention.
実施例 次の組成物を調整した。Example The following composition was prepared.
油化シエルエポキシ社製のＡ−ステージ状態
のビスフエノールＡ系エポキシ樹脂“エピコ
ート”1004 84重量部
オリエント化学社製の染料“オイルブラツ
ク”BY ７重量部
三菱化成社製の顔料カーボンブラツクMA−
100 ７重量部
ライオン・アクゾ社製の分散剤“アーマイ
ド”HT ２重量部
次に、上記組成物を170℃で30分溶融、混練し、
室温まで冷却して固化させた後、ハンマーミルで
粗粉砕した。A-stage bisphenol A epoxy resin “Epicote” 1004 manufactured by Yuka Ciel Epoxy Co., Ltd. 84 parts by weight Dye “Oil Black” BY manufactured by Orient Chemical Co., Ltd. 7 parts by weight Pigment Carbon Black MA- manufactured by Mitsubishi Chemical Corporation
100 7 parts by weight Dispersant "Aramide" HT manufactured by Lion Akzo 2 parts by weight Next, the above composition was melted and kneaded at 170°C for 30 minutes,
After being cooled to room temperature and solidified, it was coarsely ground using a hammer mill.
次に、この粗粉砕したものを、再び170℃で30
分間溶融、混練し、室温まで冷却して固化させた
後、ハンマーミルで粗粉砕した。かかる操作を２
回繰り返し行つた後、ジエツトミルで微粉砕し
て、平均粒子径が約12μのトナーを得た。溶融、
混練を繰り返し行つた結果、エポキシ樹脂はＢ−
ステージ状態に変わつた。Ｂ−ステージ状態に変
わつたことは、トナーをキシレンに接触させたと
き膨潤したので確認できた。 Next, this coarsely ground material was heated again at 170℃ for 30 minutes.
The mixture was melted and kneaded for minutes, cooled to room temperature to solidify, and then coarsely ground using a hammer mill. 2 such operations
After repeating this process several times, the powder was pulverized using a jet mill to obtain a toner having an average particle size of about 12 μm. melting,
As a result of repeated kneading, the epoxy resin became B-
It changed to a stage state. The change to the B-stage state was confirmed because the toner swelled when brought into contact with xylene.
次に、上記トナーに、日本鉄粉社製鉄キヤリア
（平均粒子径：約100μ、比表面積：約155cm2／ｇ）
をトナーが７重量％になるように混合し、現像剤
を得た。 Next, Nippon Tetsuko Co., Ltd. Steel Carrier (average particle size: approximately 100 μ, specific surface area: approximately 155 cm 2 /g) was added to the above toner.
were mixed so that the toner content was 7% by weight to obtain a developer.
次に、上記現像剤を、磁気ロールの周速を
10000行／分のプリント速度に相当する706mm／秒
に設定した現像器に入れ、その寿命を調べたとこ
ろ、約500時間であつた。なお、寿命は、フアラ
デーゲージで測定した帯電量が当初の値の1/3に
なるまでの時間として求めた。 Next, apply the above developer at a circumferential speed of the magnetic roll.
When we put it into a developing device set at 706 mm/sec, which corresponds to a printing speed of 10,000 lines/min, and checked its lifespan, it was approximately 500 hours. The lifespan was determined as the time required for the amount of charge measured with a Faraday gauge to become 1/3 of its original value.
比較例
実施例１で使用した組成物を、170℃で30分間
溶融、混練し、室温まで冷却して固化させた後、
ハンマーミルで粗粉砕し、さらにジエツトミルで
微粉砕して、平均粒子径が約12μのトナーを得
た。エポキシ樹脂は、トナーがキシレンに溶解し
たことから、Ａ−ステージ状態にあることがわか
つた。Comparative Example The composition used in Example 1 was melted and kneaded at 170°C for 30 minutes, cooled to room temperature and solidified, and then
The powder was coarsely pulverized with a hammer mill and further finely pulverized with a jet mill to obtain a toner having an average particle size of about 12 μm. The epoxy resin was found to be in an A-stage state as the toner was dissolved in xylene.
次に、実施例と同様に、現像剤を調整し、さら
に寿命を調べたところ、約100時間であり、実施
例のものの1/5にすぎなかつた。 Next, in the same manner as in the example, the developer was prepared and the lifespan was examined, and it was found to be approximately 100 hours, which was only 1/5 of that in the example.
以上説明したように、本発明の現像剤は、Ｂ−
ステージ状態のビスフエノールＡ系エポキシ樹脂
を主成分とするトナーを使用しており、Ａ−ステ
ージ状態のビスフエノールＡ系エポキシ樹脂から
なるトナーを使用している従来の現像剤にくらべ
てトナーがやや硬く、かつ粘着性も低くなつてい
るからして、キヤリアの表面を汚しにくく、キヤ
リアが比表面積が100cm2／ｇ以上であることと相
まつてキヤリア表面が汚しつくされるまでの時間
を長くとることができて寿命が大幅に延長され
る。しかも、定着の容易さは上記従来の現像剤に
くらべてほとんど低下せず、かつ定着時に有毒ガ
スやいやな臭を発生するようなこともない。そし
て、上記寿命は係状係数が5.5×10-2以上8.0×
10-2未満であるようなキヤリアを使用した場合に
は一層延長される。 As explained above, the developer of the present invention is B-
It uses a toner whose main component is bisphenol A-based epoxy resin in a stage state, and the toner is slightly smaller than a conventional developer that uses a toner made from a bisphenol A-based epoxy resin in an A-stage state. Since it is hard and has low adhesiveness, it is difficult to stain the surface of the carrier, and since the carrier has a specific surface area of 100 cm 2 /g or more, it takes a long time to completely stain the surface of the carrier. This will greatly extend the lifespan. Moreover, the ease of fixing is hardly lower than that of the above-mentioned conventional developer, and no toxic gas or unpleasant odor is generated during fixing. And, for the above life, the coefficient of engagement is 5.5×10 -2 or more and 8.0×
This is further extended if a carrier with a value less than 10 -2 is used.
本発明の現像剤は、トナーとキヤリアとのぶつ
かり合いが激しくなる、プリント速度がA4判で
30枚／分以上、特に50枚／分以上であるような電
子写真プリンタの現像剤として特に好適である
が、それ以下の、いわゆる低速プリンタや、複写
機、フアクシミリなどの現像剤として使用しても
何ら差し支えないものである。 The developer of the present invention is suitable for A4 size printing, where the collision between the toner and the carrier is intense.
It is particularly suitable as a developer for electrophotographic printers with a speed of 30 sheets/min or more, especially 50 sheets/min or more, but it cannot be used as a developer for so-called low-speed printers, copiers, facsimile machines, etc. There is no problem with this.
Claims (1)
キシ樹脂を主成分とするトナーと、比表面積が10
cm2／ｇ以上である磁性キヤリアとの混合物からな
ることを特徴とするフラツシユ定着用現像剤。1 A toner whose main component is bisphenol A-based epoxy resin in a B-stage state and a specific surface area of 10
A flash fixing developer comprising a mixture with a magnetic carrier of cm 2 /g or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57049202A JPS58168053A (en) | 1982-03-29 | 1982-03-29 | Developer for flash fixing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57049202A JPS58168053A (en) | 1982-03-29 | 1982-03-29 | Developer for flash fixing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58168053A JPS58168053A (en) | 1983-10-04 |
| JPH0136936B2 true JPH0136936B2 (en) | 1989-08-03 |
Family
ID=12824402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57049202A Granted JPS58168053A (en) | 1982-03-29 | 1982-03-29 | Developer for flash fixing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168053A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5583055A (en) * | 1978-12-19 | 1980-06-23 | Hitachi Metals Ltd | Magnetic toner |
| JPS5630139A (en) * | 1979-08-22 | 1981-03-26 | Fujitsu Ltd | Toner for powder developer suited for flush fixing |
-
1982
- 1982-03-29 JP JP57049202A patent/JPS58168053A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5583055A (en) * | 1978-12-19 | 1980-06-23 | Hitachi Metals Ltd | Magnetic toner |
| JPS5630139A (en) * | 1979-08-22 | 1981-03-26 | Fujitsu Ltd | Toner for powder developer suited for flush fixing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58168053A (en) | 1983-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4436803A (en) | Method of developing electrostatic image with magnetic brush ear promoter | |
| JP2006330277A (en) | Carrier for electrostatic latent image developer and method for manufacturing the same, electrostatic latent image developer, and image forming apparatus | |
| US4513075A (en) | Developer materials for electrostatic images | |
| US4482621A (en) | Two-component type dry developer | |
| KR100493130B1 (en) | Electrophotographic black toner, electrophotographic developer and image forming method | |
| JP2000227674A (en) | Toner and image forming method | |
| KR910007723B1 (en) | Toner for development of electrostatically charged image | |
| JPH0572812A (en) | Dry toner, developer and image forming method | |
| JP4389425B2 (en) | Toner for electrophotography and image forming method | |
| JPH10104884A (en) | Ferrite carrier for electrophotographic development | |
| JPH0136936B2 (en) | ||
| US4248950A (en) | Electrostatic developer mix containing either MoS2, TiS2, WS.sub.2 | |
| US4167411A (en) | Method for making reproductions of a graphic original from a high output electrostatic reproduction equipment | |
| JPH05119509A (en) | Positively chargeable developer for developing electrostatic charge image | |
| JPS5914746B2 (en) | Powder development toner for flash fixing | |
| JPH11231576A (en) | Carrier for reversal development | |
| JP2008180971A (en) | Electrophotographic toner, electrophotographic developer, process cartridge, and image forming apparatus | |
| JPS58211763A (en) | Electrophotographic toner | |
| JPH07248638A (en) | Electrophotographic toner | |
| JP3136605B2 (en) | Electrophotographic development method | |
| JPH11231571A (en) | Nonmagnetic one-component developing toner | |
| JP2001022123A (en) | Toner for electrophotography and image formation | |
| JPS5990863A (en) | Toner for developing electrostatic charge image | |
| JPH09179347A (en) | Color toner for developing electrostatic charge image for flash fixation | |
| JP2518227B2 (en) | Dry toner |