JPH026053B2 - - Google Patents

Info

Publication number
JPH026053B2
JPH026053B2 JP59209671A JP20967184A JPH026053B2 JP H026053 B2 JPH026053 B2 JP H026053B2 JP 59209671 A JP59209671 A JP 59209671A JP 20967184 A JP20967184 A JP 20967184A JP H026053 B2 JPH026053 B2 JP H026053B2
Authority
JP
Japan
Prior art keywords
particles
core material
inorganic fine
fine particles
capsule toner
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
Application number
JP59209671A
Other languages
Japanese (ja)
Other versions
JPS6188271A (en
Inventor
Toshiaki Nakahara
Junichi Kurimoto
Yasuhide Goseki
Toshuki Koshio
Toshuki Ochi
Naoyuki Ushama
Tooru Matsumoto
Ichiro Oosaki
Katsutoshi Wakamya
Masuo Yamazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP59209671A priority Critical patent/JPS6188271A/en
Priority to FR858514822A priority patent/FR2571515B1/en
Priority to GB08524789A priority patent/GB2167573B/en
Publication of JPS6188271A publication Critical patent/JPS6188271A/en
Priority to US07/088,540 priority patent/US4740443A/en
Publication of JPH026053B2 publication Critical patent/JPH026053B2/ja
Granted legal-status Critical Current

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
    • G03G9/093—Encapsulated toner particles
    • G03G9/0935—Encapsulated toner particles specified by the core material
    • G03G9/09385—Inorganic compounds
    • 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
    • G03G9/0825—Developers with toner particles characterised by their structure; characterised by non-homogenuous distribution of components
    • 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
    • G03G9/093—Encapsulated 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
    • G03G9/093—Encapsulated toner particles
    • G03G9/0935—Encapsulated toner particles specified by the core material
    • 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
    • G03G9/093—Encapsulated toner particles
    • G03G9/0935—Encapsulated toner particles specified by the core material
    • G03G9/09378—Non-macromolecular organic compounds
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/712—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the surface treatment or coating of magnetic particles

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Manufacturing Of Micro-Capsules (AREA)

Description

【発明の詳細な説明】 技術分野 本発明は、電子写真法、静電印刷法、磁気記録
法などに用いられるカプセルトナーおよびその製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a capsule toner used in electrophotography, electrostatic printing, magnetic recording, etc., and a method for producing the same.

背景技術 電子写真法をはじめとする上記したような記録
方法において用いられるトナーとしては、従来の
バインダー樹脂と着色剤との溶融混合物の粉砕に
よる、いわゆる粉砕法トナーに代わるものとし
て、主として加圧定着性の改善を目的として、硬
質樹脂の殻を設けたカプセル型のトナーが種々提
案されている。例えば、特公昭54−8104号などに
見られる様な軟質物質を芯とするカプセルトナ
ー、又特開昭51−132838号に示されている軟質樹
脂溶液芯カプセルトナーがあるが、加圧定着性の
不足、オフセツト現象の発生等の未解決の問題が
多く、実用化されるに至つていない。さらに、一
般にトナーには、流動性付与剤等の無機質微粒子
を外添混合して使用するが、上述の如きカプセル
トナーの場合には、コピー枚数の増加と共に流動
性付与剤等が減少し、その所期の効果が得られ
ず、画像濃度及び画質が低下することがある。BACKGROUND ART Toners used in the above-mentioned recording methods, including electrophotography, are mainly pressure-fixed as an alternative to the so-called pulverized toner, which is made by pulverizing a molten mixture of a binder resin and a colorant. Various capsule-type toners provided with hard resin shells have been proposed for the purpose of improving properties. For example, there are capsule toners with a soft material core as seen in Japanese Patent Publication No. 54-8104, and soft resin solution core capsule toners shown in Japanese Patent Application Publication No. 51-132838. There are many unresolved problems such as the lack of energy and the occurrence of offset phenomena, and it has not been put into practical use. Furthermore, toners are generally mixed with inorganic fine particles such as fluidity imparting agents, but in the case of capsule toners such as those mentioned above, fluidity imparting agents decrease as the number of copies increases. The desired effect may not be obtained and the image density and quality may deteriorate.

また、無機質微粒子の減少が著しい場合では、
現像スリーブ、感光体及びキヤリアー表面への汚
染や融着が発生するなど、現像操作の継続に対す
る耐久性に問題が生じた。 In addition, in cases where the decrease in inorganic fine particles is significant,
Problems arose in durability against continued development operations, such as contamination and fusion of the developing sleeve, photoreceptor, and carrier surfaces.

発明の目的 本発明の目的は、上述の如き欠点を補つたカプ
セルトナーおよびその製造方法を提供することに
ある。OBJECTS OF THE INVENTION It is an object of the present invention to provide a capsule toner and a method for producing the same which compensate for the above-mentioned drawbacks.

本発明のより特定の目的は、普通紙に対して、
従来よりも低圧力で、良好な定着性を有し、なお
かつ、加えられた流動性付与剤等の無機質微粒子
が、多数枚複写を行なつても、減少することが少
なく、従つて安定した画像濃度及び安定した画質
を与えることをはじめとして、その所期の作用を
安定的に発揮し得るカプセルトナーを提供するこ
とにある。 A more specific object of the present invention is to provide, for plain paper,
It has good fixing properties at a lower pressure than conventional ones, and the added inorganic fine particles such as fluidity imparting agents are less likely to decrease even when multiple copies are made, resulting in stable images. The object of the present invention is to provide a capsule toner that can stably exhibit its intended effects, including providing density and stable image quality.

本発明の他の目的は、長期にわたり連続使用し
た際も初期の特性を維持し、トナー凝集や帯電特
性の変化のないカプセルトナーを提供することに
ある。 Another object of the present invention is to provide a capsule toner that maintains its initial characteristics even when used continuously over a long period of time, and does not cause toner aggregation or change in charging characteristics.

本発明の他の目的は、鮮明な色採の画像の得ら
れるカプセルトナーを提供することにある。 Another object of the present invention is to provide a capsule toner that provides images with clear color reproduction.

本発明の更に他の目的は、上記のようなカプセ
ルトナーの効率的な製造方法を提供することにあ
る。 Still another object of the present invention is to provide an efficient method for manufacturing the capsule toner as described above.

発明の概要 本発明は、着色剤を含有する芯材と、芯材を被
覆する殻材とから形成されるカプセルトナーにお
いて、芯材は球形芯材粒子と疎水基を有する１〜
10重量％の非磁性無機質微粒子とを外添混合する
ことにより、疎水基を有する非磁性無機質微粒子
が球形芯材粒子の表面に埋め込まれている粒子か
ら形成されていることを特徴とするカプセルトナ
ーに関する。Summary of the Invention The present invention provides a capsule toner formed from a core material containing a colorant and a shell material covering the core material, wherein the core material has spherical core material particles and a hydrophobic group.
A capsule toner characterized in that non-magnetic inorganic fine particles having a hydrophobic group are formed from particles embedded in the surface of spherical core particles by externally adding and mixing 10% by weight of non-magnetic inorganic fine particles. Regarding.

さらに、本発明は、球形芯材粒子と、疎水基を
有する１〜10重量％の非磁性無機質微粒子とを外
添混合して球形芯材粒子表面に非磁性無機質微粒
子を埋め込み、該非磁性無機質微粒子を埋め込ん
だ球形芯材粒子を殻材樹脂により被覆することを
特徴とするカプセルトナーの製造方法に関する。 Furthermore, the present invention provides a method for embedding the non-magnetic inorganic fine particles on the surface of the spherical core material particles by externally adding and mixing spherical core material particles and 1 to 10% by weight of non-magnetic inorganic fine particles having a hydrophobic group. The present invention relates to a method for producing a capsule toner, which comprises covering spherical core material particles embedded with a shell material resin.

すなわち、本発明者等の研究によれば、流動性
付与剤等の無機質微粒子を外添混合により付着さ
せた芯材粒子を殻材樹脂により被覆した場合に
は、一般にカプセルトナーの殻材に要求される厚
さは圧力定着性の向上のため0.05〜0.5μｍ程度と
薄いため、この殻材に被覆された状態においても
殻材を介しての突起形成等に寄与して、その本質
的な作用を発揮し得る。一方、その付着状態は殻
材により飛躍的に強化されているため、無機質微
粒子の効果は安定的に発揮され、従つて、カプセ
ルトナーの長期運転下における性能も安定するも
のと考えられる。これに対し無機微粉体を芯物質
中に内添する方法は、添加効果が減少する為に、
その添加量を増大しなければならず、その場合、
芯物質の造粒及び色調に悪影響がでるが、本発明
の場合、このような不都合も生じない。更に、圧
力定着性の向上のため、比較的柔らかい芯材料樹
脂と、流動性、耐凝集性を付与する殻材料樹脂と
の、現像剤の耐久不良につながる樹脂の相異によ
る剥離を芯材粒子に無機微粒子を付着させ、これ
に殻材樹脂を被覆し、芯材樹脂と殻材樹脂との接
着性を高めることにより防止し、耐久性を高めて
いるものと考えられる。また、本発明のカプセル
トナーは、更に流動性付与剤等の無機質微粒子を
外添混合して、その外表面に付着させたときに、
その無機質微粒子の外添効果をより効果的に発揮
させることも見出されている。これは、予め芯材
に外添付着した無機質微粒子の存在が、これを被
覆する殻材を強化する作用を有し、そのためカプ
セルトナーに外添した無機質微粒子をより確実に
付着せしめ、その効果を発揮させるものと推定さ
れる。 That is, according to the research of the present inventors, when core material particles to which inorganic fine particles such as a fluidity imparting agent are attached by external addition and mixing are coated with shell material resin, generally the requirements for the shell material of capsule toner are met. The thickness of the coating is as thin as 0.05 to 0.5 μm in order to improve pressure fixing properties, so even when covered with this shell material, it contributes to the formation of protrusions through the shell material and does not have its essential effect. can be demonstrated. On the other hand, since the adhesion state is dramatically strengthened by the shell material, the effect of the inorganic fine particles is stably exhibited, and therefore, the performance of the capsule toner under long-term operation is also considered to be stable. On the other hand, the method of internally adding inorganic fine powder to the core material reduces the effect of addition.
The amount added must be increased, in which case
Although the granulation and color tone of the core material are adversely affected, in the case of the present invention, such disadvantages do not occur. Furthermore, in order to improve pressure fixing properties, core material particles are used to prevent peeling due to the difference between the relatively soft core material resin and the shell material resin that provides fluidity and agglomeration resistance, which can lead to poor developer durability. It is thought that this is prevented by attaching inorganic fine particles to the core material and coating it with shell material resin to increase the adhesiveness between the core material resin and the shell material resin, thereby increasing durability. In addition, when the capsule toner of the present invention is further mixed with externally added inorganic fine particles such as a fluidity imparting agent and adhered to the outer surface of the capsule toner,
It has also been found that the external addition effect of inorganic fine particles can be more effectively exhibited. This is because the presence of inorganic fine particles externally attached to the core material in advance has the effect of strengthening the shell material that covers it, which allows the inorganic fine particles externally added to the capsule toner to adhere more reliably and enhances its effect. It is presumed that this will be achieved.

発明の具体的な説明 本発明に用いる芯材料としては、好ましい定着
性を示す軟質固体状物質は、すべて利用できる。
このような物質としては、ワツクス類（密ろう、
カルナウバろう、マイクロクリスタリンワツクス
など）、高級脂肪酸（ステアリン酸、パルミチン
酸、ラウリン酸など）、高級脂肪酸金属塩（ステ
アリン酸アルミニウム、ステアリン酸鉛、ステア
リン酸バリウム、ステアリン酸マグネシウム、ス
テアリン酸亜鉛、パルミチン酸亜鉛など）、高級
脂肪酸誘導体（メチルヒドロキシステアレート、
グリセロールモノヒドロキシステアレートなど）、
ポリオレフイン（低分子量ポリエチレン、低分子
量ポリプロピレン、酸化ポリエチレン、ポリイソ
ブチレン、ポリ４弗化エチレンなど）、オレフイ
ン共重合体（エチレン−アクリル酸共重合体、エ
チレン−アクリル酸エステル共重合体、エチレン
−メタクリル酸共重合体、エチレン−メタクリル
酸エステル共重合体、エチレン−塩化ビニル共重
合体、エチレン−酢酸ビニル共重合体、アイオノ
マー樹脂など）、スチレン系樹脂（低分子量ポリ
スチレン、スチレン−ブタジエン共重合体、（モ
ノマー重量比５〜30：95〜70）、スチレン−アク
リル系化合物共重合体など）、エポキシ樹脂、ポ
リエステル樹脂（酸価10以下）、ゴム類（イソブ
チレンゴム、ニトリルゴム、塩化ゴムなど）、ポ
リビニルピロリドン、ポリアミド、クマロン−イ
ンデン樹脂、メチルビニルエーテル−無水マレイ
ン酸共重合体、マレイン酸変性フエノール樹脂、
フエノール変性テルペン樹脂、シリコン樹脂など
があり、これらの中から単独又は組合せて用いる
ことができる。DETAILED DESCRIPTION OF THE INVENTION As the core material used in the present invention, any soft solid substance exhibiting favorable fixing properties can be used.
Such substances include waxes (bees wax,
carnauba wax, microcrystalline wax, etc.), higher fatty acids (stearic acid, palmitic acid, lauric acid, etc.), higher fatty acid metal salts (aluminum stearate, lead stearate, barium stearate, magnesium stearate, zinc stearate, palmitin) zinc acid, etc.), higher fatty acid derivatives (methyl hydroxystearate,
glycerol monohydroxystearate, etc.),
Polyolefins (low molecular weight polyethylene, low molecular weight polypropylene, polyethylene oxide, polyisobutylene, polytetrafluoroethylene, etc.), olefin copolymers (ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid) Copolymers, ethylene-methacrylic acid ester copolymers, ethylene-vinyl chloride copolymers, ethylene-vinyl acetate copolymers, ionomer resins, etc.), styrenic resins (low molecular weight polystyrene, styrene-butadiene copolymers, Monomer weight ratio 5-30:95-70), styrene-acrylic compound copolymer, etc.), epoxy resin, polyester resin (acid value 10 or less), rubbers (isobutylene rubber, nitrile rubber, chlorinated rubber, etc.), polyvinyl Pyrrolidone, polyamide, coumaron-indene resin, methyl vinyl ether-maleic anhydride copolymer, maleic acid-modified phenolic resin,
There are phenol-modified terpene resins, silicone resins, and the like, and these can be used alone or in combination.

本発明のカプセルトナーの芯材中には一般に、
着色剤として各種の染、顔料が含まれる。このよ
うな染、顔料としては、例えば、カーボンブラツ
ク、ニグロシン染料、ランプ黒、スーダンブラツ
クSM、フアースト・エローＧ、ベンジジン・エ
ロー、ピグメント・エロー、インドフアースト・
オレンジ、イルガジン・レツド、パラニトロアニ
リン・レツド、トルイジン・レツド、カーミン
FB、パーマネント・ボルドーFRR、ピグメン
ト・オレンジＲ、リソール・レツド2G、レー
キ・レツドＣ、ローダミンFB、ローダミンＢレ
ーキ、メチル・バイオレツトＢレーキ、フタロシ
アニンブルー、ピグメントブルー、ブリリヤン
ト・グリーンＢ、フタロシアニングリーン、オイ
ルイエローGG、ザポン・フアーストエロー
CGG、カヤセツトY963、カヤセツトYG、スミ
プラスト・エローGG、ザポンフアーストオレン
ジRR、オイル・スカーレツト、スミプラストオ
レンジＧ、オラゾール・ブラウンＢ、ザポンフア
ーストスカーレツトCG、アイゼンスピロン・レ
ツド・BEH、オイルピンクOPなどが適用でき
る。 The core material of the capsule toner of the present invention generally includes:
Coloring agents include various dyes and pigments. Examples of such dyes and pigments include carbon black, nigrosine dye, lamp black, Sudan Black SM, First Yellow G, Benzidine Yellow, Pigment Yellow, and India First Yellow.
Orange, Irgazine Red, Paranitroaniline Red, Toluidine Red, Carmine
FB, Permanent Bordeaux FRR, Pigment Orange R, Resole Red 2G, Lake Red C, Rhodamine FB, Rhodamine B Lake, Methyl Violet B Lake, Phthalocyanine Blue, Pigment Blue, Brilliant Green B, Phthalocyanine Green, Oil Yellow GG, Zapon First Yellow
CGG, Kayaset Y963, Kayaset YG, Sumiplast Yellow GG, Zapon First Orange RR, Oil Scarlet, Sumiplast Orange G, Orazole Brown B, Zapon First Scarlet CG, Eisenspiron Red BEH, Oil Pink OP etc. can be applied.

トナーを磁性トナーとして用いるために、芯材
中に磁性粉を含有せしめても良い。このような磁
性粉としては、磁場の中に置かれて磁化される物
質が用いられ、鉄、コバルト、ニツケルなどの強
磁性金属の粉末、もしくはマグネタイト、ヘマタ
イト、フエライトなどの合金や化合物がある。こ
の磁性粉の含有量はトナー重量に対して15〜70重
量％が良い。 In order to use the toner as a magnetic toner, magnetic powder may be contained in the core material. Such magnetic powder is a substance that is magnetized when placed in a magnetic field, and includes powders of ferromagnetic metals such as iron, cobalt, and nickel, and alloys and compounds such as magnetite, hematite, and ferrite. The content of this magnetic powder is preferably 15 to 70% by weight based on the weight of the toner.

本発明のカプセルトナーの芯材は、上記成分
を、例えば溶融混練し、スプレードライヤー等に
て造粒し、更に必要に応じて分級することによ
り、体積平均粒径が５〜20μの微粒子として調製
される。 The core material of the capsule toner of the present invention is prepared as fine particles with a volume average particle diameter of 5 to 20μ by, for example, melting and kneading the above components, granulating them using a spray dryer, and further classifying as necessary. be done.

本発明に従い、上記のようにして得られた芯材
粒子に無機質微粒子を外添混合して、芯材粒子表
面に無機質微粒子を付着させる。 According to the present invention, inorganic fine particles are externally added and mixed to the core material particles obtained as described above, so that the inorganic fine particles are attached to the surface of the core material particles.

本発明に用いる無機微粉体としては、例えば、、
アルミナ、二酸化チタン、チタン酸バリウム、チ
タン酸マグネシウム、チタン酸カルシウム、チタ
ン酸ストロンチウム、酸化亜鉛、ケイ砂、クレ
ー、雲母、ケイ灰石、ケイソウ土、各種無機酸化
物顔料、酸化クロム、酸化セリウム、ベンガラ、
三酸化アンチモン、酸化マグネシウム、酸化ジル
コニウム、硫酸バリウム、炭酸バリウム、炭酸カ
ルシウム、シリカ微粉体、炭化ケイ素、窒化ケイ
素、炭化ホウ素、炭化タングステン、炭化チタ
ン、などの粉末乃至粒子が挙げれる。無機質微粒
子としては、通常非磁性のものが用いられるが、
磁性粒子も用いられないわけではない。これらの
無機微粉体は、表面に疎水基を有するものが好ま
しく、例えば、シランカツプリング剤、チタンカ
ツプリング剤、シリコーンオイル、側鎖にアミン
を有するシリコーンオイル等で処理されたものな
どが良い。また無機質微粒子としては、芯材粒子
よりも微小な寸法を有するものが用いられ、より
詳しくは、N2吸着によるBET法による比表面積
が、50〜400m2／ｇの範囲のものが好ましく用い
られる。 Examples of the inorganic fine powder used in the present invention include:
Alumina, titanium dioxide, barium titanate, magnesium titanate, calcium titanate, strontium titanate, zinc oxide, silica sand, clay, mica, wollastonite, diatomaceous earth, various inorganic oxide pigments, chromium oxide, cerium oxide, Bengala,
Examples include powders and particles of antimony trioxide, magnesium oxide, zirconium oxide, barium sulfate, barium carbonate, calcium carbonate, silica fine powder, silicon carbide, silicon nitride, boron carbide, tungsten carbide, titanium carbide, and the like. Non-magnetic particles are usually used as inorganic particles, but
Magnetic particles can also be used. These inorganic fine powders preferably have a hydrophobic group on their surface, and are preferably treated with a silane coupling agent, a titanium coupling agent, silicone oil, a silicone oil having an amine in a side chain, or the like. In addition, as the inorganic fine particles, those having a smaller size than the core material particles are used, and more specifically, those having a specific surface area measured by the BET method using N 2 adsorption are preferably used in the range of 50 to 400 m 2 /g. .

なお、無機質微粒子は、殻材厚さの0.1〜５倍、
より好ましくは0.2〜２倍の粒径をもつものが好
ましい。 In addition, the inorganic fine particles are 0.1 to 5 times the thickness of the shell material,
More preferably, those having a particle size of 0.2 to 2 times are preferred.

殻材厚さの0.1倍未満の粒径を有する無機質微
粒子は、殻材中にほぼ完全に埋め込まれるため、
突起形成に寄与する割合も少なく好ましくない。
又、殻材厚さの５倍以上の粒径を有する無機質微
粒子は、殻材中に保持することが困難で、マイク
ロカプセルトナーより分離し、本発明にかかる効
果を減少させるほか、トナーの破壊を招くなど好
ましくない。 Inorganic fine particles with a particle size less than 0.1 times the shell material thickness are almost completely embedded in the shell material, so
The proportion contributing to protrusion formation is also small, which is not preferable.
In addition, inorganic fine particles having a particle size of five times or more than the thickness of the shell material are difficult to retain in the shell material and are separated from the microcapsule toner, reducing the effects of the present invention and causing destruction of the toner. It is not desirable to invite

上記粒径範囲は、電子顕微鏡により任意に100
ケ以上を選びその平均粒径として満たされればよ
いが、より好ましくは90％以上が上記粒径範囲内
の無機質微粒子が用いられる。 The above particle size range is arbitrarily determined by electron microscopy.
It is sufficient if the average particle size is selected to satisfy the above average particle size, but it is more preferable to use inorganic fine particles in which 90% or more of the particle size is within the above particle size range.

本発明に於いて、これら無機微粉体は、コーヒ
ーミル、粉砕器、ヘンシエル等の粉体混合あるい
は粉砕機を使用して、芯材粒子に、好ましくは例
えば40〜50℃程度の加温下で、外添混合された後
カプセル化されるが、その添加量は芯材重量に対
して0.1〜50重量％、特に好ましくは１〜10重量
％の範囲で用いられる。このような外添混合操作
により、無機質微粒子を芯材粒子の表面あるいは
表層に埋め込まれた状態で付着させる。 In the present invention, these inorganic fine powders are mixed into core particles using a powder mixer or a grinder such as a coffee mill, a grinder, a Henschel, etc., preferably under heating at about 40 to 50°C. After being externally added and mixed, it is encapsulated, and the amount added is 0.1 to 50% by weight, particularly preferably 1 to 10% by weight, based on the weight of the core material. By such an external addition mixing operation, the inorganic fine particles are attached to the core material particles in a state where they are embedded in the surface or surface layer.

このような外添混合操作においても、多少の無
機質微粒子は、芯材粒子に付着せずに、単に自由
粒子として芯材粒子と混合した状態となり得る
が、このような付着していない無機質微粒子も、
引続くカプセル化操作において殻材中に取り込ま
れるので、上記のようにして得られた外添混合物
を、そのままカプセル化工程に供給することがで
きる。 Even in such an external addition mixing operation, some inorganic fine particles may not adhere to the core material particles and may simply be mixed with the core material particles as free particles, but such inorganic fine particles that are not attached may also ,
Since it is incorporated into the shell material in the subsequent encapsulation operation, the external additive mixture obtained as described above can be supplied as is to the encapsulation process.

上記のようにして得られた無機質微粒子を付着
させた芯材粒子ないしは芯材粒子と無機質微粒子
との外添混合物を、殻材樹脂により被覆する。 The core material particles to which inorganic fine particles are attached or the externally added mixture of core material particles and inorganic fine particles obtained as described above are coated with shell material resin.

殻材樹脂としては、公知の樹脂が使用可能であ
り、例えば、次の様なモノマー類から成る樹脂が
ある。スチレン、Ｐ−クロルスチレン、Ｐ−ジメ
チルアミノ−スチレンなどのスチレン及びその置
換体；アクリル酸メチル、アクリル酸エチル、ア
クリル酸ブチル、メタクリル酸メチル、メタクリ
ル酸エチル、メタクリル酸ブチル、メタクリル酸
Ｎ，Ｎ−ジメチルアミノエチルエステルなどのア
クリル酸あるいはメタクリル酸のエステル；無水
マレイン酸あるいは無水マレイン酸のハーフエス
テル、ハーフアミドあるいはジエステルイミド、
ビニルピリジン、Ｎ−ビニルイミダゾールなどの
含窒素ビニル；ビニルホルマール、ビニルブチラ
ールなどのビニルアセタール；塩化ビニル、アク
リロニトリル、酢酸ビニルなどのビニルモノマ
ー；塩化ビニリデン、フツ化ビニリデンなどのビ
ニリデンモノマー；エチレン、プロピレンなどの
オレフインモノマーである。また、ポリエステ
ル、ポリカーボネート、ポリスルホネート、ポリ
アミド、ポリウレタン、ポリウレア、エポキシ樹
脂、ロジン、変成ロジン、テルペン樹脂、フエノ
ール樹脂、脂肪族又は脂環族炭化水素樹脂、芳香
族系石油樹脂、メラミン樹脂、ポリフエニレンオ
キサイドのようなポリエーテル樹脂あるいはチオ
エーテル樹脂、などの単独重合物、あるいは共重
合体、もしくは混合物が使用できる。 As the shell material resin, known resins can be used, such as resins made of the following monomers. Styrene and its substituted products such as styrene, P-chlorostyrene, P-dimethylamino-styrene; methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, N,N methacrylate - esters of acrylic or methacrylic acid such as dimethylaminoethyl ester; maleic anhydride or half esters, half amides or diesterimides of maleic anhydride;
Nitrogen-containing vinyls such as vinylpyridine and N-vinylimidazole; Vinyl acetals such as vinyl formal and vinyl butyral; Vinyl monomers such as vinyl chloride, acrylonitrile, and vinyl acetate; Vinylidene monomers such as vinylidene chloride and vinylidene fluoride; ethylene, propylene, etc. is an olefin monomer. In addition, polyester, polycarbonate, polysulfonate, polyamide, polyurethane, polyurea, epoxy resin, rosin, modified rosin, terpene resin, phenol resin, aliphatic or alicyclic hydrocarbon resin, aromatic petroleum resin, melamine resin, polyphenylene Homopolymers, copolymers, or mixtures of polyether resins such as nylene oxide or thioether resins can be used.

更に本発明にかかるように外殻の厚さが0.05〜
0.5μと薄いものは、芯材として用いられる軟質固
体状物質、染顔料、磁性体を溶融混練後、液中に
分散し固化する方法あるいはスプレードライ法な
どにより製造される球状（1.0≦長径／短径≦
1.2）のものが好ましい。ジエツトミル等で粉砕
した芯粒子が非球状不定形のものは外殻の被覆が
不均一で、特に外殻被覆が薄い場合芯粒子表面の
被覆されない部位が多くなり、従つて現像撹拌に
おける機械的力により芯粒子表面上の無機質微粒
子の付着状態が損なわれ、その効果の発揮も不安
定で、耐久性にも劣つたものとなる。 Furthermore, according to the present invention, the thickness of the outer shell is 0.05~
Those as thin as 0.5μ are spherical (1.0≦major diameter/ Short diameter≦
1.2) is preferred. If the core particles are non-spherical or irregularly shaped after being ground with a jet mill, etc., the outer shell coating will be non-uniform, and especially if the outer shell coating is thin, there will be many uncovered areas on the surface of the core particle, and therefore the mechanical force during development agitation will increase. This impairs the state of adhesion of the inorganic fine particles on the surface of the core particles, resulting in unstable performance and poor durability.

なお本発明にかかる殻材厚の値は、実施例にあ
るように相分離法によりカプセル化を行なう場合
は、殻材と、芯材の仕込量より、次の式で求める
ことができる。 In addition, the value of the shell material thickness according to the present invention can be determined by the following formula from the charged amounts of the shell material and the core material when encapsulation is performed by a phase separation method as in the examples.

δ＝Ｗ／Ｓ・Ｇ／ρ・Ｄ／σ ここで、各記号は下記を意味する。 δ=W/S・G/ρ・D/σ Here, each symbol means the following.

δ：殻材厚 Ｄ：芯材平均直径 Ｓ：芯材仕込量 ρ：殻材密度 Ｗ：殻材仕込量 Ｇ：芯材密度。δ: shell material thickness D: Core material average diameter S: Core material preparation amount ρ: shell material density W: Amount of shell material prepared G: Core material density.

また芯材平均直径Ｄは、コールターカウンター
（Coulter Counter、登録商標）による測定に基
づく重量平均径である。 Further, the core material average diameter D is a weight average diameter based on measurement using a Coulter Counter (registered trademark).

上記した重合体を外殻とするカプセルトナーを
得るには、種々の公知のカプセル化技術を利用す
ることができる。例えば、スプレードライ法、コ
アセルベーシヨン法、相分離法などが好適に使用
できるほか、in−situ重合法、米国特許第
3338991号明細書、同第3326848号明細書、同第
3502582号明細書に記載されている方法なども使
用できる。 Various known encapsulation techniques can be used to obtain a capsule toner having an outer shell made of the above-mentioned polymer. For example, spray drying method, coacervation method, phase separation method, etc. can be suitably used, as well as in-situ polymerization method, U.S. Pat.
Specification No. 3338991, Specification No. 3326848, Specification No.
The method described in No. 3502582 can also be used.

かくして得られる本発明のカプセルトナーは、
一般に、0.05〜0.5μの厚さの外殻を有し、体積平
均粒径が６〜22μのマイクロカプセルとなる。ま
た、その芯材表面近傍には、無機質微粒子が存在
する形態となる。ここで無機質微粒子が存在する
「芯材の表面近傍」とは、芯材粒子の表面（殻材
との界面）ならびに芯材粒子直径の1/5以内の深
さの表層部分を指し、この範囲内に無機質微粒子
の90％以上、特に95％以上が存在する状態が好ま
しい。 The capsule toner of the present invention thus obtained is:
Generally, the microcapsules have an outer shell thickness of 0.05 to 0.5 microns and a volume average particle size of 6 to 22 microns. Further, inorganic fine particles are present near the surface of the core material. Here, "near the surface of the core material" where inorganic fine particles exist refers to the surface of the core material particle (interface with the shell material) and the surface layer at a depth within 1/5 of the diameter of the core material particle. It is preferable that 90% or more, particularly 95% or more of the inorganic fine particles are present in the inorganic particles.

さらに本発明のカプセルトナーは体積固有抵抗
が1010Ωcm以上、特に1012Ωcm以上とすることが
好ましい。ここで言う体積固有抵抗は、トナーを
100Kg／cm2の圧で成型し、これに100V／cmの電界
を印加して、印加後１分を経た後の電流値から換
算した値として定義される。 Further, the capsule toner of the present invention preferably has a volume resistivity of 10 10 Ωcm or more, particularly 10 12 Ωcm or more. The volume resistivity referred to here refers to the toner
It is defined as the value calculated from the current value after 1 minute after molding with a pressure of 100 Kg/cm 2 and applying an electric field of 100 V/cm.

本発明のカプセルトナーには、先にも述べたよ
うに、更に荷電制御、流動性付与、着色等の目的
でカーボンブラツク、各種染顔料、疎水性コロイ
ド状シリカ等を外添混合することができ、これら
の添加効果を安定的に発揮せしめることができ
る。これら外添成分はカプセルトナー100部に対
して0.1〜５部程度適当である。 As mentioned above, carbon black, various dyes and pigments, hydrophobic colloidal silica, etc. can be externally added to the capsule toner of the present invention for the purpose of charge control, fluidity imparting, coloring, etc. , it is possible to stably exhibit the effects of these additions. The appropriate amount of these external additives is about 0.1 to 5 parts per 100 parts of the capsule toner.

発明の効果 上記したように、本発明によれば、流動性付与
剤等の無機質微粒子を外添混合により付着させた
芯材粒子を殻材樹脂により被覆することにより、
無機質微粒子を強固に保持し、その効果を長期に
わたつて安定的に発揮させることができるカプセ
ルトナーが得られる。Effects of the Invention As described above, according to the present invention, core material particles to which inorganic fine particles such as a fluidity imparting agent are attached by external addition and mixing are coated with shell material resin.
A capsule toner can be obtained that can firmly hold inorganic fine particles and exhibit its effects stably over a long period of time.

以下、実施例、比較例により本発明を更に具体
的に説明する。 Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples.

実施例 １ 芯物質は、ハイワツクス200P（三井石油化学
製）20部、パラフインワツクス155（日本精蝋製）
80部、フタロシアニンブルー５部を150℃で溶融
混合し、スプレードライヤーで造粒後、乾式分級
を行なうことにより、粒径が10.3μ±5.0μであり、
球形状の芯材粒子が得られた。Example 1 Core materials were Hiwax 200P (Mitsui Petrochemical) 20 parts, Paraffin Wax 155 (Nippon Seiso)
By melt-mixing 80 parts of phthalocyanine blue and 5 parts of phthalocyanine blue at 150°C, granulating it with a spray dryer, and performing dry classification, the particle size was 10.3μ±5.0μ.
Spherical core particles were obtained.

一方、乾式法で合成されたシリカ微粉体（比表
面積：約130m2／ｇ）100重量部を撹拌しながら側
鎖にアミンを有するアミノ変性シリコーンオイル
（25℃における粘度70cps、アミン当量830）12重
量部を噴霧し、温度をおよそ250℃に保持して60
分間で処理した。 On the other hand, while stirring 100 parts by weight of silica fine powder (specific surface area: approx. 130 m 2 /g) synthesized by a dry process, amino-modified silicone oil having an amine in the side chain (viscosity at 25°C, 70 cps, amine equivalent: 830) was mixed with 12 60°C by spraying the weight part and maintaining the temperature at approximately 250°C.
Processed in minutes.

前記球形芯材粒子１Kgに上記の側鎖にアミンを
有するアミノ変性シリコーンオイルで処理したシ
リカ微粉体20ｇ（平均粒径0.2μ）をヘンシエルミ
キサー10B型（三井三池製作所）にて、温度45℃
回転目盛10で４分間の条件で外添混合し、球形芯
材粒子表面にアミノ変性シリコーンオイルで処理
したシリカ微粉体を埋め込んだ。次いで上記の芯
物質とシリカ微粉体との外添混合物を、有機相か
らの相分離方法によりスチレン−ジメチルアミノ
エチルメタクリレート（モル比90／10）共重合体
で、0.4μの膜厚で被覆し、カプセル化トナー粒子
を得た。得られたカプセル化トナー粒子100ｇに、
上記のアミノ変性シリコーンオイルで処理したシ
リカ微粉体1.0ｇを更に、上記と同様にして外添
混合し、カプセル化トナー粒子表面に、アミノ変
性シリコーンオイルで処理したシリカ微粉体を有
するカプセルトナーを得た。このカプセルトナー
をミクロトームにより切断し、透過型電子顕微鏡
で観察したところ、表面のシリカに加えてトナー
の芯材と殻材との界面ならびにこれより若干芯材
の内側にシリカ微粉体が集合しているのが確認さ
れた。 1 kg of the spherical core material particles were mixed with 20 g of fine silica powder (average particle size 0.2 μ) treated with the above amino-modified silicone oil having an amine in the side chain using a Henschel mixer model 10B (Mitsui Miike Manufacturing Co., Ltd.) at a temperature of 45°C.
The mixture was externally added and mixed at a rotation scale of 10 for 4 minutes, and fine silica powder treated with amino-modified silicone oil was embedded in the surface of the spherical core material particles. Next, the externally added mixture of the core material and silica fine powder was coated with a styrene-dimethylaminoethyl methacrylate (molar ratio 90/10) copolymer to a thickness of 0.4μ by a phase separation method from the organic phase. , encapsulated toner particles were obtained. To 100 g of the obtained encapsulated toner particles,
Further, 1.0 g of the silica fine powder treated with the above amino-modified silicone oil is externally added and mixed in the same manner as above to obtain a capsule toner having silica fine powder treated with the amino-modified silicone oil on the surface of the encapsulated toner particles. Ta. When this capsule toner was cut with a microtome and observed with a transmission electron microscope, it was found that in addition to the silica on the surface, fine silica powder was gathered at the interface between the toner core material and shell material and slightly inside the core material. It was confirmed that there was.

このカプセルトナー12ｇに対し、キヤリア（日
本鉄粉製EFV250／400）88ｇを混合して現像剤
とし、負の静電荷を有する潜像を現像した後、上
質紙上に転写した。トナー画像を有する被転写紙
を両端から、圧接力を加わえられるようにした２
本の加圧ローラーからなる圧力定着機を通したと
ころ、10Kg／cmの線圧力で、ほぼ完全な定着性を
示し、画像濃度は、1.6でありカブリのない鮮明
な反転画像が形成され、良好であつた。さらに、
A4サイズの原稿で3000枚の連続耐久試験を行な
つたところ、常に画像濃度が1.4以上であり、カ
ブリのない良好な画像が安定して得られた。 To 12 g of this capsule toner, 88 g of Carrier (EFV250/400 manufactured by Nippon Steel Powder) was mixed to prepare a developer, and a latent image having a negative electrostatic charge was developed and then transferred onto high-quality paper. 2. Pressure force can be applied from both ends of the transfer paper bearing the toner image.
When the book was passed through a pressure fixing device consisting of a pressure roller, it showed almost perfect fixing performance at a linear pressure of 10 kg/cm, and the image density was 1.6, forming a clear reversed image without fog, which was good. It was hot. moreover,
In a continuous durability test of 3,000 sheets of A4 size originals, the image density was always 1.4 or higher, and good images without fogging were consistently obtained.

また、耐久試験前後のトナー表面を、走査型電
子顕微鏡で観察したところ、カプセルトナーに外
添したシリカ量に有意差は認められなかつた。 Furthermore, when the toner surface before and after the durability test was observed using a scanning electron microscope, no significant difference was observed in the amount of silica externally added to the capsule toner.

比較例 １ アミノ変性シリコーンオイルで処理したシリカ
微粉体の芯物質への外添を除く以外は、実施例１
と同様の操作を繰り返した。Comparative Example 1 Example 1 except that the silica fine powder treated with amino-modified silicone oil was not externally added to the core material.
The same operation was repeated.

初期画像は、実施例１と同様に、画像濃度1.5
であり、カブリのない鮮明な反転画像が形成さ
れ、定着性も良好であつたが、3000枚の連続耐久
試験に於いて、耐久試験枚数とともに濃度低下
（画像濃度1.0）し、またカブリも発生した。また
感光体表面へのフイルミング及び現像スリーブの
両端に若干の融着が見られ、トナー表面を走査型
電子顕微鏡観察したところ、耐久試験後に於い
て、前に比べてカプセルトナーに外添したシリカ
量の明らかな減少が見られた。 The initial image has an image density of 1.5 as in Example 1.
A clear reversed image with no fog was formed and the fixing performance was good, but in a continuous durability test of 3000 sheets, the density decreased (image density 1.0) with the number of sheets tested, and fogging also occurred. did. In addition, filming on the surface of the photoconductor and some fusion were observed at both ends of the developing sleeve, and when the toner surface was observed with a scanning electron microscope, it was found that the amount of silica externally added to the capsule toner was lower than before after the durability test. A clear decrease was observed.

実施例 ２ 実施例１の芯物質に対する外添剤として、アミ
ノ変性シリコーンオイルで処理したシリカ微粉体
の代わりに、５重量％のイソプロポキシチタント
リイソステアレート（日本曹達製TTS）で処理
した酸化チタン（平均粒径0.1μ）を用いたことを
除いては、実施例１と同様の操作を繰返したとこ
ろ、良好な結果が得られたが、耐久試験後に於け
るカプセルトナーに外添したシリカ量は若干減少
していた。Example 2 As an external additive for the core material of Example 1, instead of the silica fine powder treated with amino-modified silicone oil, oxidized titanium triisostearate treated with 5% by weight of isopropoxytitanium triisostearate (TTS manufactured by Nippon Soda) was used. Good results were obtained by repeating the same operation as in Example 1, except for using titanium (average particle size 0.1μ). However, after the durability test, silica added externally to the capsule toner The amount had decreased slightly.

実施例 ３ 実施例１の芯物質に対する外添剤としてアミノ
変性シリコーンオイルで処理したシリカ微粉体の
代わりに、３重量％のイソプロポキシチタントリ
イソステアレートで処理した炭化ケイ素（平均粒
径0.38μ）を用いたことを除いては、実施例１と
同様に行なつたところ、良好な結果が得られた。Example 3 Instead of the silica fine powder treated with amino-modified silicone oil as an external additive for the core material of Example 1, silicon carbide (average particle size 0.38μ) treated with 3% by weight of isopropoxytitanium triisostearate was used. ) was carried out in the same manner as in Example 1, except that a good result was obtained.

比較例 ２ ハイワツクス200Pを20部、パラフインワツク
ス155を80部、フタロシアニンブルーを５部及び
実施例１で調製した側鎖にアミンを有するアミノ
変性シリコーンオイルで処理したシリカ微粉体を
2.1部を原料として使用して、実施例１と同様に
して溶融混合、造粒、乾式分級を行い球形芯材粒
子を得た。Comparative Example 2 Fine silica powder treated with 20 parts of Hiwax 200P, 80 parts of Paraffin Wax 155, 5 parts of Phthalocyanine Blue, and the amino-modified silicone oil having an amine in the side chain prepared in Example 1 was prepared.
Using 2.1 parts as a raw material, melt mixing, granulation, and dry classification were performed in the same manner as in Example 1 to obtain spherical core material particles.

得られた球形芯材粒子を、更にシリカ微粉体の
外添を行うことなく、実施例１と同様にしてスチ
レン−ジメチルアミノエチルメタクリレート共重
合体で0.4μの膜厚で被覆し、カプセル化トナー粒
子を得、次いでカプセルトナーを得た。 The obtained spherical core material particles were coated with styrene-dimethylaminoethyl methacrylate copolymer to a thickness of 0.4 μm in the same manner as in Example 1 without further externally adding silica fine powder to form an encapsulated toner. Particles were obtained and then capsule toner was obtained.

得られたカプセルトナーを使用して、実施例１
と同様にして画出試験をおこなつたところ約500
枚位から画質が低下し、感光ドラム表面にカプセ
ルトナーの融着がみられた。 Example 1 using the obtained capsule toner
When I conducted an image output test in the same manner as above, the result was approximately 500.
The image quality deteriorated starting from the first page, and fusion of capsule toner was observed on the surface of the photosensitive drum.

比較例 ３ 実施例１で調製された球形芯材粒子を、スチレ
ン−ジメチルアミノエチルメタクリレート（モル
比90／10）共重合体100重量部及び側鎖にアミン
を有するアミノ変性シリコーンオイルで処理した
シリカ微粉体２重量部からなる均一混合物で、膜
厚約0.4μになるように実施例１と同様にして被覆
処理してカプセル化トナー粒子を得、次いで実施
例１と同様にして更にアミノ変性シリカ微粉体の
外添を行いカプセルトナーを得た。Comparative Example 3 The spherical core particles prepared in Example 1 were treated with 100 parts by weight of styrene-dimethylaminoethyl methacrylate (molar ratio 90/10) copolymer and amino-modified silicone oil having an amine in the side chain. Encapsulated toner particles were obtained by coating with a homogeneous mixture consisting of 2 parts by weight of fine powder in the same manner as in Example 1 to a film thickness of approximately 0.4 μm, and then further coated with amino-modified silica in the same manner as in Example 1. A capsule toner was obtained by externally adding fine powder.

得られたカプセルトナーを使用して、実施例１
と同様にして画出試験をおこなつたところ、画出
初期からカブリが多く、また約500枚位から画像
濃度が低下しはじめた。 Example 1 using the obtained capsule toner
When I conducted an image output test in the same manner as above, there was a lot of fog from the beginning of image output, and the image density began to decrease after about 500 sheets.

Claims (1)

【特許請求の範囲】 １ 着色剤を含有する芯材と、芯材を被覆する殻
材とから形成されるカプセルトナーにおいて、芯
材は球形芯材粒子と疎水基を有する１〜10重量％
の非磁性無機質微粒子とを外添混合することによ
り、疎水基を有する非磁性無機質微粒子が球形芯
材粒子の表面に埋め込まれている粒子から形成さ
れていることを特徴とするカプセルトナー。 ２ 非磁性無機質微粒子は、N2吸着によるBET
法による比表面積が50〜400m2／ｇを有する特許
請求の範囲第１項のカプセルトナー。 ３ 殻材が厚さ0.05〜0.5μを有する特許請求の範
囲第１項または第２項のカプセルトナー。 ４ 球形芯材粒子と、疎水基を有する１〜10重量
％の非磁性無機質微粒子とを外添混合して球形芯
材粒子表面に非磁性無機質微粒子を埋め込み、該
非磁性無機質微粒子を埋め込んだ球形芯材粒子を
殻材樹脂により被覆することを特徴とするカプセ
ルトナーの製造方法。[Scope of Claims] 1. In a capsule toner formed from a core material containing a colorant and a shell material covering the core material, the core material contains 1 to 10% by weight of spherical core material particles and a hydrophobic group.
A capsule toner characterized in that non-magnetic inorganic fine particles having a hydrophobic group are formed from particles embedded in the surface of spherical core particles by externally adding and mixing non-magnetic inorganic fine particles. 2 Non-magnetic inorganic fine particles undergo BET by N2 adsorption.
The capsule toner according to claim 1, having a specific surface area of 50 to 400 m 2 /g. 3. The capsule toner according to claim 1 or 2, wherein the shell material has a thickness of 0.05 to 0.5μ. 4 A spherical core in which spherical core material particles and 1 to 10% by weight of non-magnetic inorganic fine particles having a hydrophobic group are externally added and mixed, the non-magnetic inorganic fine particles are embedded on the surface of the spherical core material particles, and the non-magnetic inorganic fine particles are embedded. A method for producing a capsule toner, the method comprising coating material particles with a shell resin.
JP59209671A 1984-10-08 1984-10-08 Capsule toner and its production Granted JPS6188271A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP59209671A JPS6188271A (en) 1984-10-08 1984-10-08 Capsule toner and its production
FR858514822A FR2571515B1 (en) 1984-10-08 1985-10-07 COATED PIGMENT POWDER FOR THE DEVELOPMENT OF ELECTROSTATIC IMAGES AND ITS PRODUCTION METHOD
GB08524789A GB2167573B (en) 1984-10-08 1985-10-08 Encapsulated toner for development of electro-static images and process for producing the same
US07/088,540 US4740443A (en) 1984-10-08 1987-08-20 Encapsulated electrostatic toner with locally attached non-magnetic inorganic particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59209671A JPS6188271A (en) 1984-10-08 1984-10-08 Capsule toner and its production

Publications (2)

Publication Number Publication Date
JPS6188271A JPS6188271A (en) 1986-05-06
JPH026053B2 true JPH026053B2 (en) 1990-02-07

Family

ID=16576674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59209671A Granted JPS6188271A (en) 1984-10-08 1984-10-08 Capsule toner and its production

Country Status (1)

Country Link
JP (1) JPS6188271A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5043240A (en) * 1989-09-05 1991-08-27 Xerox Corporation Encapsulated toner compositions
JP3969873B2 (en) * 1997-12-27 2007-09-05 キヤノン株式会社 Toner and image forming method using the toner

Also Published As

Publication number Publication date
JPS6188271A (en) 1986-05-06

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