JPH0638165B2 - Toner for electrostatic latent image development - Google Patents
Toner for electrostatic latent image developmentInfo
- Publication number
- JPH0638165B2 JPH0638165B2 JP59042954A JP4295484A JPH0638165B2 JP H0638165 B2 JPH0638165 B2 JP H0638165B2 JP 59042954 A JP59042954 A JP 59042954A JP 4295484 A JP4295484 A JP 4295484A JP H0638165 B2 JPH0638165 B2 JP H0638165B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- softening point
- parts
- resin
- particles
- 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 - Lifetime
Links
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
- G03G9/0821—Developers with toner particles characterised by physical parameters
-
- 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
-
- 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
- G03G9/0819—Developers with toner particles characterised by the dimensions of the particles
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Description
【発明の詳細な説明】 技術分野 この発明は、電子写真用の一成分あるいは二成分系現像
剤用の乾式トナーに関する。Description: TECHNICAL FIELD The present invention relates to a dry toner for a one-component or two-component developer for electrophotography.
従来技術 電子写真の乾式トナーは、その定着温度をできるだけ低
下させるためのトナー粒子の材料として用いられる樹脂
の軟化点が低いものを使用する傾向にある。しかし、低
軟化点樹脂でつくられているトナー粒子は、ブロッキン
グ、すなわち、トナー粒子同士がそれらの接触点で融着
する性質があり、実用上の欠点となっている。2. Description of the Related Art As a dry toner for electrophotography, a resin used as a material for toner particles for lowering the fixing temperature thereof as low as possible tends to be used. However, toner particles made of a low softening point resin have a blocking property, that is, the toner particles are fused to each other at their contact points, which is a practical drawback.
これを改善するために低軟化点樹脂の表面にシリカ等の
高融点の第三添加成分の微粒子を付着させたトナー粒
子、あるいは低軟化点樹脂に高軟化点樹脂をブレンドし
た樹脂でトナーをつくることが提案されたが、このよう
な手段では定着温度が期待した程低下しないのが欠点で
あった。To improve this, toner is made with toner particles in which particles of a high-melting third addition component such as silica are attached to the surface of a low softening point resin, or a resin in which a high softening point resin is blended with a low softening point resin. However, the disadvantage is that the fixing temperature does not drop as much as expected by such means.
更に、低軟化点樹脂粒子の表面に高軟化点樹脂の被覆層
を設けたいわゆるカプセル型のトナーも提案されている
が製造条件が難しいのが欠点であった。Further, a so-called capsule type toner in which a coating layer of a high softening point resin is provided on the surface of the low softening point resin particles has been proposed, but it has a drawback that the manufacturing conditions are difficult.
目 的 この発明は、高軟化点微粒子が低軟化点粒子の表面に付
着して低軟化点粒子同士の接触を防止してブロッキング
性が向上するようにしたトナーを提供することを目的と
している。Aim This invention has an object to provide a toner in which high softening point fine particles adhere to the surface of low softening point particles to prevent contact between low softening point particles to improve blocking properties.
構 成 この発明は、結着樹脂と着色剤を主成分とし、軟化点が
130℃以下で体積平均粒径が 6μ以上のトナー粒子と、
軟化点が 130℃より高く、体積平均粒径が５μ以下のト
ナー粒子を混合したものであることを特徴とする静電潜
像現像用トナーである。Composition This invention is mainly composed of a binder resin and a colorant and has a softening point.
Toner particles having a volume average particle size of 6 μ or more at 130 ° C. or less,
An electrostatic latent image developing toner comprising a mixture of toner particles having a softening point higher than 130 ° C. and a volume average particle diameter of 5 μm or less.
この発明でいう軟化点と、環球式軟化点（ＪＩＳ Ｋ -
2531）である。上述の軟化点が低く粒径の大きいトナー
粒子と、軟化点が高く粒径の小さいトナー粒子とを用い
たことにより、高軟化点のトナー粒子が、低軟化点のト
ナー粒子の表面に付着して、低軟化点粒子同士の接触を
防止して耐ブロッキング性が向上する。The softening point referred to in the present invention and the ring and ball softening point (JIS K-
2531). By using the toner particles having a low softening point and a large particle diameter and the toner particles having a high softening point and a small particle diameter, the high softening point toner particles adhere to the surface of the low softening point toner particles. As a result, the particles having a low softening point are prevented from contacting with each other to improve the blocking resistance.
この発明で用いる結着樹脂は、従来公知のいずれの樹脂
でもよく、例えば、スチレン系樹脂、アクリル系樹脂、
ポリ塩化ビニル、ポリ酢酸ビニル、エポキシ樹脂、アル
キッド樹脂あるいはポリエステル樹脂等がある。The binder resin used in the present invention may be any conventionally known resin, for example, a styrene resin, an acrylic resin,
There are polyvinyl chloride, polyvinyl acetate, epoxy resin, alkyd resin, polyester resin and the like.
低軟化点粒子に対する高軟化点粒子の添加量は重量比で
2〜80％、好ましくは 5〜30％である。The addition amount of high softening point particles to low softening point particles is a weight ratio.
It is 2 to 80%, preferably 5 to 30%.
この発明のトナーの製造は、結着樹脂、カーボンブラッ
ク等の着色剤をよく混合し、熱ロールミルで混練した
後、冷却、固化後粉砕し、必要な粒径に分級する。In the production of the toner of the present invention, a binder resin, a colorant such as carbon black, etc. are well mixed, kneaded by a hot roll mill, cooled, solidified and then pulverized to be classified to a required particle size.
以下、実施例によって、この発明を具体的に説明する。
各原料成分の量はすべて重量部である。Hereinafter, the present invention will be specifically described with reference to examples.
The amounts of each raw material component are all parts by weight.
実施例１ スチレン樹脂（重量平均分子量60,000） 環球式軟化点 115℃ 90部 カーボンブラック 10部 上記組成の材料から体積平均粒径13.0μのトナーをつく
った。Example 1 Styrene resin (weight average molecular weight 60,000) Ring-and-ball type softening point 115 ° C. 90 parts Carbon black 10 parts A toner having a volume average particle diameter of 13.0 μ was prepared from the materials having the above compositions.
これをトナーＡとする。これとは別に、 スチレン樹脂（重量平均分子量 180,000） 環球式軟化点 140℃ 90部 カーボンブラック 10部 上記組成の材料で体積平均粒径 3.0μのトナーをつくっ
た。これをトナーＢとする。This is designated as Toner A. Separately, styrene resin (weight average molecular weight 180,000), ring and ball softening point 140 ° C. 90 parts carbon black 10 parts A toner having a volume average particle diameter of 3.0 μ was prepared from the above composition. This is designated as Toner B.
次いでトナーＡ80部、トナーＢ20部をヘンシェルミキサ
ーで混合し、この発明のトナーをつくった。Next, 80 parts of Toner A and 20 parts of Toner B were mixed with a Henschel mixer to prepare the toner of the present invention.
また比較のため、トナーＡ単独のものとトナーＢ単独の
もの（ただし粒径は13.0μにした）をつくり、定着性、
保存性（ブロッキング性）、キャリア表面への熱融着
性、を試験して下記第１表に示す結果になった。For comparison, toner A alone and toner B alone (however, the particle size was set to 13.0 μ) were prepared,
The storability (blocking property) and the heat fusion property to the carrier surface were tested, and the results shown in Table 1 below were obtained.
試験方法 １．定着性；クロックメーターによる定着率が70％に達
するときの温度、 ２．ブロッキング性；20mmφ×100mm のガラスビンにト
ナーを10g 入れ、タッピング50回後、55℃の恒温槽で10
時間放置後、ＪＩＳ Ｋ 2530の針入度計で測定。 Test method 1. Fixability; temperature at which the fixing rate by the clock meter reaches 70%, 1. Blocking ability: Put 10g of toner in a glass bottle of 20mmφ × 100mm, tap it 50 times, and then in a thermostat bath at 55 ℃.
After standing for a while, measure with a JIS K 2530 penetrometer.
熱融着性： 100μ球状鉄粉98g とトナー2gを120ml のス
テンレスポット入れ、10時間撹拌後、現像剤をブローオ
フして、帯電にて付着しているトナーを飛ばした後、キ
ャリアをトルエン中に分散し、透過率を測定し、あらか
じめ求めておいた検量線から求める。Thermal adhesiveness: 98g of 100μ spherical iron powder and 2g of toner were put in a 120ml stainless steel pot, stirred for 10 hours, blown off the developer, blow off the toner adhering by charging, and then put the carrier in toluene. It is dispersed, the transmittance is measured, and it is determined from the calibration curve obtained in advance.
上記表から、この発明のトナーは定着性、ブロッキング
性、熱融着性が優れていることがわかる。From the above table, it can be seen that the toner of the present invention is excellent in fixing property, blocking property, and heat fusion property.
実施例２ エポキシ樹脂（重量平均分子量 120,000） 環球式軟化点 140℃ 90部 カーボンブラック 10部 上記組成の材料で体積平均粒径12.5μのトナーをつくっ
た。これをトナーＣとする。このトナーとは別に、 メチルメタクリレート共重合体 （重量平均分子量 230,000） 環球式軟化点 150℃ 90部 カーボンブラック ７部 オイルブラック−ＳＢ ３部 この組成の材料で体積平均粒径 5μのトナーを作った。
これをトナーＤとする。Example 2 Epoxy resin (weight average molecular weight 120,000) Ring and ball softening point 140 ° C. 90 parts Carbon black 10 parts A toner having a volume average particle size of 12.5 μ was prepared from the above-mentioned composition. This is designated as toner C. Separately from this toner, methyl methacrylate copolymer (weight average molecular weight 230,000) Ring-and-ball type softening point 150 ° C 90 parts Carbon black 7 parts Oil black-SB 3 parts A toner having a volume average particle diameter of 5μ was made from the material of this composition. .
This is designated as toner D.
ついでトナーＣ85部とトナーＤ15部をヘンシェルミキサ
ーで混合し、この発明の製品トナーとした。Then, 85 parts of Toner C and 15 parts of Toner D were mixed with a Henschel mixer to obtain a product toner of the present invention.
また比較のためにトナーＣ、トナーＤ（ただし粒径は1
2.5μにした）それぞれ単独のもの、ならびにブロッキ
ング防止のために一般に用いられているシリカ（日本ア
エロジルＲ− 972）をトナーＣに添加したものをつくり
比較試験をした。その結果を下記表２に示す。For comparison, Toner C and Toner D (However, the particle size is 1
Comparative tests were carried out using toner C (2.5 μm each) and silica (Nihon Aerosil R-972), which is commonly used for preventing blocking, added to toner C. The results are shown in Table 2 below.
このように、この発明のトナーは、定着性、ブロッキン
グ性、熱融着性が優れており、かつ、シリカを添加した
ものに比較しても優れていることが明らかである。 As described above, it is apparent that the toner of the present invention is excellent in fixing property, blocking property, and heat-sealing property, and is also excellent as compared with the toner to which silica is added.
実施例３ ポリエステル樹脂（重量平均分子量 110,000）環球式軟
化点 145℃ 93部 カーボンブラック ５部 ニグロシン系染料 （ニグロシンベースＥＸ） ２部 この組成の混合物を体積平均粒径12.5μのトナーに成形
した。これをトナーＥとする。Example 3 Polyester resin (weight average molecular weight 110,000) Ring and ball softening point 145 ° C. 93 parts Carbon black 5 parts Nigrosine dye (Nigrosine base EX) 2 parts A mixture of this composition was molded into a toner having a volume average particle diameter of 12.5 μ. This is designated as toner E.
スチレン−ｎ−ブチルメタクリレート共重合物体 （重量平均分子量 230,0000） 90部 カーボンブラック ５部 ニグロシン系染料 （ニグロシンベースＥＸ） ５部 この組成の混合物を体積平均粒径 4.0μのトナーにし
た。これをトナーＦとする。Styrene-n-butylmethacrylate copolymerized body (weight average molecular weight 230,0000) 90 parts Carbon black 5 parts Nigrosine dye (Nigrosine base EX) 5 parts A mixture having this composition was used as a toner having a volume average particle size of 4.0 µ. This is designated as toner F.
ついで、トナーＥ70部とトナーＦ30部をヘンシェルミキ
サーで混合し、この発明の製品トナーとした。Then, 70 parts of Toner E and 30 parts of Toner F were mixed with a Henschel mixer to obtain the product toner of the present invention.
また比較のためにトナーＥ、トナーＦ（ただし粒径12.5
μにした）それぞれ単独のもの、ならびにトナーＥにシ
リカ（Ｒ−972 ）を添加した結果を下記第３表に示す。For comparison, Toner E and Toner F (however, particle size 12.5
The results obtained by adding silica (R-972) to Toner E alone are shown in Table 3 below.
このように、この発明のトナーは、定着性、ブロッキン
グ性、熱融着性が優れている。また、シリカを添加した
ものに比較しても優れていることが明らかである。 As described above, the toner of the present invention is excellent in fixing property, blocking property, and heat fusion property. It is also clear that it is superior to the one to which silica is added.
効 果 以上説明したように、この発明によれば、トナー製造時
および保存時のプロッキング性や機械内部での破壊やキ
ャリア表面への熱融着性を何も損ねることなく、低温度
で定着が可能である。Effect As described above, according to the present invention, fixing at a low temperature can be performed without damaging any of the blocking property during toner production and storage, the damage inside the machine, and the heat fusion property to the carrier surface. Is possible.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中山 信広 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 (56)参考文献 特開 昭58−70237（ＪＰ，Ａ) 特開 昭57−201242（ＪＰ，Ａ) 特開 昭55−28020（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiro Nakayama 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (56) References JP-A-58-70237 (JP, A) JP-A-57 -201242 (JP, A) JP-A-55-28020 (JP, A)
Claims (1)
130℃以下で体積平均粒径が６μ以上のトナー粒子と、
軟化点が130℃より高く、体積平均粒径が５μ以下のト
ナー粒子を混合したものであることを特徴とする熱定着
静電潜像現像用トナー。1. A binder resin and a colorant as main components, having a softening point.
Toner particles having a volume average particle size of 6 μm or more at 130 ° C. or less,
A toner for developing a heat fixing electrostatic latent image, comprising a mixture of toner particles having a softening point of higher than 130 ° C. and a volume average particle diameter of 5 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59042954A JPH0638165B2 (en) | 1984-03-08 | 1984-03-08 | Toner for electrostatic latent image development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59042954A JPH0638165B2 (en) | 1984-03-08 | 1984-03-08 | Toner for electrostatic latent image development |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60188957A JPS60188957A (en) | 1985-09-26 |
| JPH0638165B2 true JPH0638165B2 (en) | 1994-05-18 |
Family
ID=12650410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59042954A Expired - Lifetime JPH0638165B2 (en) | 1984-03-08 | 1984-03-08 | Toner for electrostatic latent image development |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638165B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9071872B2 (en) | 2003-01-30 | 2015-06-30 | Rovi Guides, Inc. | Interactive television systems with digital video recording and adjustable reminders |
| US9075861B2 (en) | 2006-03-06 | 2015-07-07 | Veveo, Inc. | Methods and systems for segmenting relative user preferences into fine-grain and coarse-grain collections |
| US9118948B2 (en) | 1998-07-14 | 2015-08-25 | Rovi Guides, Inc. | Client-server based interactive guide with server recording |
| US9118958B2 (en) | 1999-12-10 | 2015-08-25 | Rovi Guides, Inc. | Systems and methods for coordinating interactive and passive advertisement and merchandising opportunities |
| US9124932B2 (en) | 1995-10-02 | 2015-09-01 | Rovi Guides, Inc. | Systems and methods for contextually linking television program information |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0762764B2 (en) * | 1986-04-08 | 1995-07-05 | 日立金属株式会社 | Thermal fixing type electrostatic image developing toner |
| JP2009229759A (en) * | 2008-03-21 | 2009-10-08 | Casio Electronics Co Ltd | Manufacturing method of electrophotographic toner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57201242A (en) * | 1981-06-04 | 1982-12-09 | Canon Inc | Pressure fixable developer |
-
1984
- 1984-03-08 JP JP59042954A patent/JPH0638165B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9124932B2 (en) | 1995-10-02 | 2015-09-01 | Rovi Guides, Inc. | Systems and methods for contextually linking television program information |
| US9118948B2 (en) | 1998-07-14 | 2015-08-25 | Rovi Guides, Inc. | Client-server based interactive guide with server recording |
| US9118958B2 (en) | 1999-12-10 | 2015-08-25 | Rovi Guides, Inc. | Systems and methods for coordinating interactive and passive advertisement and merchandising opportunities |
| US9071872B2 (en) | 2003-01-30 | 2015-06-30 | Rovi Guides, Inc. | Interactive television systems with digital video recording and adjustable reminders |
| US9075861B2 (en) | 2006-03-06 | 2015-07-07 | Veveo, Inc. | Methods and systems for segmenting relative user preferences into fine-grain and coarse-grain collections |
| US9092503B2 (en) | 2006-03-06 | 2015-07-28 | Veveo, Inc. | Methods and systems for selecting and presenting content based on dynamically identifying microgenres associated with the content |
| US9128987B2 (en) | 2006-03-06 | 2015-09-08 | Veveo, Inc. | Methods and systems for selecting and presenting content based on a comparison of preference signatures from multiple users |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60188957A (en) | 1985-09-26 |
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