JPH0638165B2 - An electrostatic latent image developing toner - - Google Patents

An electrostatic latent image developing toner -

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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
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JP
Japan
Prior art keywords
toner
softening point
parts
resin
latent image
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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
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JP59042954A
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Japanese (ja)
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JPS60188957A (en
Inventor
信広 中山
陽一郎 渡辺
哲夫 磯田
三夫 青木
Original Assignee
株式会社リコー
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Application filed by 株式会社リコー filed Critical 株式会社リコー
Priority to JP59042954A priority Critical patent/JPH0638165B2/en
Publication of JPS60188957A publication Critical patent/JPS60188957A/en
Publication of JPH0638165B2 publication Critical patent/JPH0638165B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00Developers
    • G03G9/08Developers with toner particles
    • G03G9/0821Developers with toner particles characterised by physical parameters
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00Developers
    • G03G9/08Developers with toner particles
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00Developers
    • G03G9/08Developers with toner particles
    • G03G9/0819Developers with toner particles characterised by the dimensions of the particles

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。 TECHNICAL FIELD The present invention Detailed Description of the Invention relates to a dry toner for 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。 Dry toner of the prior art electrophotography, there is a tendency that the softening point of the resin used as the material for the toner particles to reduce as much as possible the fixing temperature to use those lower. 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。 However, toner particles made of low softening point resin, blocking, i.e., has the property of toner particles with each other is fused at their contact points, has 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。 Making toner low softening point toner particles were deposited fine particles of the third additive component of high melting point such as silica on the surface of the resin or low softening point high softening point resin was blended resin in the resin, in order to improve this it has been proposed, not much lowered as the fixing temperature is expected in such a device were drawbacks.

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。 Furthermore, the so-called capsule having a coating layer of the high softening point resin to the surface of the low softening point resin particles toner has been proposed but the manufacturing conditions are difficult was disadvantages.

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。 Purpose This invention aims to provide a toner which high softening point fine particles so as to improve the blocking property to prevent contact of the low softening point grains adhering to the surface of the low softening point particles.

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 Organization This invention, as a main component a binder resin and a colorant, softening point
130℃以下で体積平均粒径が 6μ以上のトナー粒子と、 Toner particles having a volume average particle diameter is more than 6μ at 130 ° C. or less,
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。 Softening point is higher than 130 ° C., a toner for developing an electrostatic latent image, characterized in that the volume average particle diameter and mixing the following toner particles 5 [mu].

この発明でいう軟化点と、環球式軟化点(JIS K - A softening point referred to in the present invention, ring and ball softening point (JIS K -
2531)である。 2531) is. 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。 And large toner particles having a particle diameter softening point lower described above, by the softening point and using a smaller toner particles increases the particle size, the toner particles of high softening point, and adhere to the surface of the toner particles of a low softening point Te, blocking resistance is improved by preventing contact between the low softening point particles.

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、 The binder resin used in this invention may be any conventionally known resin, for example, styrene resins, acrylic resins,
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。 Polyvinyl chloride, polyvinyl acetate, there is an epoxy resin, an alkyd resin or a polyester resin.

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 The addition amount of the high softening point particles with respect to the low softening point particles in a weight ratio
2〜80%、好ましくは 5〜30%である。 2-80%, preferably 5-30%.

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。 Production of the toner of the present invention, the binder resin, mixed well coloring agent such as carbon black, was kneaded with hot roll mill, cooled, crushed after solidification, classified to the desired particle size.

以下、実施例によって、この発明を具体的に説明する。 Hereinafter, examples will be specifically described the present invention.
各原料成分の量はすべて重量部である。 The amount 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。 It made a toner having a volume average particle size of 13.0μ Examples 1 styrene resin (weight average molecular weight 60,000) ring and ball softening point of 115 ° C. 90 parts of carbon black 10 parts materials of the above composition.

これをトナーAとする。 This is referred to as toner A. 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。 Apart from this, it creates a toner having a volume average particle size of 3.0μ material of styrene resin (weight average molecular weight 180,000) ring and ball softening point of 140 ° C. 90 parts of carbon black 10 parts The above composition. これをトナーBとする。 This is referred to 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。 Then the toner A80 parts, were mixed B20 parts of the toner in a Henschel mixer to make a 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、 For comparison, making those toner A alone and the toner B alone ones (although particle size was 13.0Myu), fixability,
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。 Storage stability (blocking resistance) and heat-welding to the carrier surface, and tested it to the results shown in Table 1 below.

試験方法 1. Test Method 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. Fixability; temperature when the fixing rate by the clock meter reaches 70% 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 Blocking property; 20 mm.phi × 100 mm glass bottle toner placed 10g in the, after 50 times tapping 10 in a thermostatic bath at 55 ° C.
時間放置後、JIS K 2530の針入度計で測定。 After standing time, measured by penetrometer of JIS K 2530.

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。 Heat fusible: Put 100μ spherical iron powder 98g and stainless pot toner 2 g 120 ml, after stirring for 10 hours, and blow the developer, after skipping the toner adhering by charging a carrier in toluene dispersed, the transmittance was measured, determined from a calibration curve previously obtained.

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, the toner of the present invention it can be seen that the fixing property, blocking resistance, thermal adhesiveness is excellent.

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。 It made a toner having a volume average particle size of 12.5μ in Example 2 Epoxy resin (weight average molecular weight of 120,000) ring and ball softening point of 140 ° C. 90 parts of carbon black 10 parts The above composition material. これをトナーCとする。 This is referred to as toner C. 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。 Apart from this toner to make a toner having a volume average particle size of 5μ material methyl methacrylate copolymer (weight average molecular weight 230,000) ring and ball softening point of 0.99 ° C. 90 parts of carbon black, 7 parts Oil Black -SB 3 parts This composition .
これをトナーDとする。 This is referred to 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 mixed toner C85 parts of toner D15 parts by a Henschel mixer to obtain a toner product 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 The toner C For comparison, a toner D (although particle size is 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。 In the) alone with those derived 2.5 [mu], and the silica is generally used (Nippon Aerosil R- 972) and the comparative test make those added to the toner C to prevent blocking. その結果を下記表2に示す。 The results are shown in Table 2.

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。 Thus, the toner of the present invention, the fixing property, blocking resistance, and thermal adhesiveness is excellent, and it is clear that excellent as compared with those with the addition of silica.

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。 Were molded Example 3 Polyester resin (weight average molecular weight: 110,000) ring and ball softening point of 145 ° C. 93 parts of carbon black 5 parts Nigrosine dyes (nigrosine base EX) 2 parts mixture of this composition in the toner having a volume average particle size of 12.5. これをトナーEとする。 This is referred to 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。 Styrene -n- butyl methacrylate copolymer object (weight average molecular weight 230,0000) was 90 parts of carbon black 5 parts Nigrosine dyes (nigrosine base EX) 5 parts of a mixture of this composition in the toner having a volume average particle size of 4.0μ. これをトナーFとする。 This is referred to 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, by mixing the toner E70 parts of toner F30 parts by a Henschel mixer to obtain a toner product 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 The toner E for comparison, toner F (provided that the particle size 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。 In the) alone with those derived mu, as well as the results of the addition of silica (R-972) to the toner E 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。 The toner of this manner, the present invention is the fixing property, blocking resistance, thermal adhesiveness is excellent. 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。 Moreover, it is clear that excellent as compared with those with the addition of silica.

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。 As described effects above, according to the present invention, anything without impairing the heat-welding of the toner during production and during storage flop locking resistance and mechanical inside destruction or carrier surface, fixing at a low temperature it 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) ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Nobuhiro Nakayama Ota-ku, Tokyo Nakamagome 1-chome No. 3 No. 6 stock company in the Ricoh (56) reference Patent Sho 58-70237 (JP, a) JP Akira 57 -201242 (JP, A) JP Akira 55-28020 (JP, A)

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】結着樹脂と着色剤を主成分とし、軟化点が [Claim 1] as a main component a binder resin and a colorant, softening point
    130℃以下で体積平均粒径が6μ以上のトナー粒子と、 Toner particles having a volume average particle diameter is more than 6μ at 130 ° C. or less,
    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。 Softening point is higher than 130 ° C., thermal fixing toner for developing an electrostatic latent image, wherein the volume average particle diameter is obtained by mixing the following toner particles 5 [mu].
JP59042954A 1984-03-08 1984-03-08 An electrostatic latent image developing toner - Expired - Lifetime JPH0638165B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59042954A JPH0638165B2 (en) 1984-03-08 1984-03-08 An electrostatic latent image developing toner -

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59042954A JPH0638165B2 (en) 1984-03-08 1984-03-08 An electrostatic latent image developing toner -

Publications (2)

Publication Number Publication Date
JPS60188957A JPS60188957A (en) 1985-09-26
JPH0638165B2 true JPH0638165B2 (en) 1994-05-18

Family

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JP59042954A Expired - Lifetime JPH0638165B2 (en) 1984-03-08 1984-03-08 An electrostatic latent image developing toner -

Country Status (1)

Country Link
JP (1) JPH0638165B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8869204B2 (en) 1996-05-03 2014-10-21 Starsight Telecast, Inc. Method and system for displaying advertisements in an electronic program guide
US9003451B2 (en) 1996-12-10 2015-04-07 Rovi Guides, Inc. Internet television program guide system
US9055318B2 (en) 1998-07-14 2015-06-09 Rovi Guides, Inc. Client-server based interactive guide with server storage
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
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0762764B2 (en) * 1986-04-08 1995-07-05 日立金属株式会社 Heat-fixing type electrostatic image developing toner -
JP2009229759A (en) * 2008-03-21 2009-10-08 Casio Comput Co Ltd Manufacturing method of electrophotographic toner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57201242A (en) * 1981-06-04 1982-12-09 Canon Inc Pressure fixable developer

Cited By (11)

* Cited by examiner, † Cited by third party
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
US8869204B2 (en) 1996-05-03 2014-10-21 Starsight Telecast, Inc. Method and system for displaying advertisements in an electronic program guide
US9003451B2 (en) 1996-12-10 2015-04-07 Rovi Guides, Inc. Internet television program guide system
US9055318B2 (en) 1998-07-14 2015-06-09 Rovi Guides, Inc. Client-server based interactive guide with server storage
US9118948B2 (en) 1998-07-14 2015-08-25 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9055319B2 (en) 1998-07-14 2015-06-09 Rovi Guides, Inc. Interactive guide with 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

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