JP2014006525A - 高い真円度を有する乾燥トナー粒子の製造方法 - Google Patents
高い真円度を有する乾燥トナー粒子の製造方法 Download PDFInfo
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- 239000011787 zinc oxide Substances 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
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
- G03G9/09716—Inorganic compounds treated with organic 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
- G03G9/0802—Preparation methods
- G03G9/081—Preparation methods by mixing the toner components in a liquefied state; melt kneading; reactive mixing
-
- 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
- G03G9/0815—Post-treatment
-
- 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
-
- 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
- G03G9/0827—Developers with toner particles characterised by their shape, e.g. degree of sphericity
-
- 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
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—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
- G03G9/097—Plasticisers; Charge controlling agents
- G03G9/09708—Inorganic compounds
- G03G9/09725—Silicon-oxides; Silicates
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Developing Agents For Electrophotography (AREA)
- Glanulating (AREA)
Abstract
【解決手段】トナー樹脂を、着色剤と、場合によりワックスとを溶融混合して、トナーを形成する工程、トナーを研削して、トナー粒子を形成する工程、トナー粒子を平均4〜10ミクロンのサイズの粒子に分類する工程、高速ブレンダにて、分類されたトナー粒子を添加剤とブレンドする工程、および次いで円錐ミキサにて、混合物を任意の追加の表面添加剤で処理する工程を含む。この方法により、高い真円度およびよりシャープな粒径分布を有するトナー粒子を製造する。トナー粒子の表面処理は、トナー粒子の内部構成成分に影響を与えない。
【選択図】なし
Description
線状および架橋されたポリエステル樹脂と顔料との混合物からなるXerox iGen3(商標)乾燥インクトナーは、乾燥トナー粒子を形成する従来のプロセスに従って製造され、表面添加剤とブレンドされた。
Claims (10)
- トナー樹脂、着色剤、任意のワックス、および表面添加剤を含む乾燥トナー粒子を形成する工程であって、この乾燥トナー粒子が、真円度および粒径分布を有する工程;および次いで
円錐ミキサ中のトナー粒子を処理する工程を含む、トナー粒子を製造する方法であって、この処理された粒子が、処理前のトナー粒子よりも高い真円度および狭い粒径分布を有する、方法。 - 前記乾燥トナー粒子を形成する工程が:
前記トナー樹脂と前記着色剤、および場合により前記ワックスとを押出成型機中で溶融混合して、トナー混合物を形成する工程;
前記押出成型された粒子を研削する工程;
前記研削された粒子を、サイズの平均が4〜10ミクロンのサイズの粒子に分類する工程;および
前記分類されたトナー粒子と、表面添加剤とを高速ブレンダにてブレンドし、乾燥トナー粒子を形成する工程を含む、請求項1に記載の方法。 - 前記処理されたトナー粒子が、0.951〜0.99の真円度を有する、請求項1に記載の方法。
- 前記処理されたトナー粒子が、1.0〜1.3の数平均幾何学粒度分布(GSDn)を有する、請求項1に記載の方法。
- 前記処理されたトナー粒子が、1.1〜1.28の数平均幾何学粒度分布(GSDn)、および1.1〜1.175の体積平均幾何学粒度分布(GSDv)を有する、請求項1に記載の方法。
- 前記処理されたトナー粒子が、表面添加剤の表面層を有し、この表面層が7nm〜300nmの厚さを有する、請求項1に記載の方法。
- 前記トナー粒子の前記円錐ミキサにおける処理が:
第1の期間、第1の回転速度にて前記トナー粒子を混合する工程;および
前記トナー粒子を、第2の期間、第2の回転速度にて混合する工程を含み、
この第1の回転速度が、この第2の回転速度よりも速く、第1の期間が第2の期間未満である、請求項1に記載の方法。 - 前記第1の回転速度が、約140mmの混合ツール直径に関しては約8.1m/秒〜約10.3m/秒のチップ速度、および約280mmの混合ツール直径に関しては16.1m/秒〜約20.5m/秒のチップ速度に対応し、前記第1の期間が、30秒から120秒の範囲にあり;
第2の回転速度が、約140mmの混合ツール直径に関しては約2.2m/秒〜約5.1m/秒のチップ速度、および約280mmの混合ツール直径に関しては4.4m/秒〜約10.3m/秒のチップ速度に対応し、第2の期間が30分から120分の範囲である、請求項7に記載の方法。 - 前記トナー粒子の第1の回転速度における第1の期間の混合工程が、15〜30℃の温度で行われ、前記トナー粒子の第2の回転速度における第2の期間の混合工程が、50〜100℃の温度で行われる、請求項7に記載の方法。
- トナー樹脂、着色剤、および任意のワックスを含む乾燥トナー粒子を形成する工程であって、この乾燥トナー粒子が、真円度および粒径分布を有する工程;および次いで
円錐ミキサ中のトナー粒子を表面添加剤を用いて処理する工程であって、この表面添加剤が、このトナー粒子の0.1〜5重量%の量で存在する工程を含む、トナー粒子を製造する方法であって、
この処理された粒子が、処理前のトナー粒子よりも高い真円度および狭い粒径分布を有する、方法。
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US13/533,346 US8673532B2 (en) | 2012-06-26 | 2012-06-26 | Method of producing dry toner particles having high circularity |
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US10042279B2 (en) * | 2014-09-23 | 2018-08-07 | Hewlett-Packard Development Company L.P. | Ink composition |
JP7069788B2 (ja) | 2017-03-17 | 2022-05-18 | 株式会社リコー | トナーおよびその製造方法、画像形成方法、画像形成装置並びにプロセスカートリッジ |
CN106842841A (zh) * | 2017-04-12 | 2017-06-13 | 珠海思美亚碳粉有限公司 | 正电非磁性色调剂的制备方法 |
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