JP2010197594A - 現像剤、画像形成ユニット及び画像形成装置 - Google Patents
現像剤、画像形成ユニット及び画像形成装置 Download PDFInfo
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Abstract
【解決手段】テトラヒドロフラン可溶分のゲル浸透クロマトグラフィーで測定したときの分子量分布において、重量分子量Mwが2×103 以上、かつ、3×104 以下の範囲にメインピークを、重量分子量Mwが200以上、かつ、500以下の範囲にショルダーピークを有する。メインピークにおける半値幅が50000以下である。ガラス転移点Tgが55〔℃〕以上、かつ、80〔℃〕以下である。前記現像剤を使用して印刷を行うと、定着温度が低くても定着率を高くすることができる。
【選択図】図1
Description
ε=Da/Db
で表され、定着率εが高いほど定着性が高い。
Claims (7)
- (a)テトラヒドロフラン可溶分のゲル浸透クロマトグラフィーで測定したときの分子量分布において、重量分子量Mwが2×103 以上、かつ、3×104 以下の範囲にメインピークを、重量分子量Mwが200以上、かつ、500以下の範囲にショルダーピークを有し、
(b)前記メインピークの半値幅が50000以下であり、
(c)示差熱量分析計DSCによって測定されるガラス転移点Tgが55〔℃〕以上、かつ、80〔℃〕以下であることを特徴とする現像剤。 - フローテスタ融点Tmが110〔℃〕以上、かつ、140〔℃〕以下である請求項1に記載の現像剤。
- 中間粒子のスチレン/アクリル比が所定の値にされる請求項1又は2に記載の現像剤。
- 中間粒子の合成時間が所定の値にされる請求項1又は2に記載の現像剤。
- 請求項1〜4のいずれか1項に記載の現像剤が使用される画像形成ユニット。
- (a)現像剤像を媒体に転写する転写部と、
(b)転写された前記現像剤像を媒体に定着させる定着装置とを有するとともに、
(c)該定着装置における線速が、162〔mm/s〕以上、かつ、189〔mm/s〕以下にされる請求項6に記載の画像形成ユニットが搭載された画像形成装置。 - 前記定着装置における線速はヒートローラの線速である請求項6に記載の画像形成装置。
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JP2009040927A JP2010197594A (ja) | 2009-02-24 | 2009-02-24 | 現像剤、画像形成ユニット及び画像形成装置 |
US12/706,140 US8431299B2 (en) | 2009-02-24 | 2010-02-16 | Developer, image forming unit and image forming apparatus |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013514544A (ja) * | 2009-12-16 | 2013-04-25 | 三星精密化学株式会社 | 静電荷像現像用トナー |
JP2016170343A (ja) * | 2015-03-13 | 2016-09-23 | 株式会社リコー | トナー、トナー収容ユニット及び画像形成装置 |
JP2016170345A (ja) * | 2015-03-13 | 2016-09-23 | 株式会社リコー | トナー、トナー収容ユニット及び画像形成装置 |
JP2016170342A (ja) * | 2015-03-13 | 2016-09-23 | 株式会社リコー | トナー、トナー収容ユニット及び画像形成装置 |
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WO2017159288A1 (ja) * | 2016-03-15 | 2017-09-21 | 株式会社リコー | トナー、トナー収容ユニット、及び画像形成装置 |
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JP2013514544A (ja) * | 2009-12-16 | 2013-04-25 | 三星精密化学株式会社 | 静電荷像現像用トナー |
JP2016170343A (ja) * | 2015-03-13 | 2016-09-23 | 株式会社リコー | トナー、トナー収容ユニット及び画像形成装置 |
JP2016170345A (ja) * | 2015-03-13 | 2016-09-23 | 株式会社リコー | トナー、トナー収容ユニット及び画像形成装置 |
JP2016170342A (ja) * | 2015-03-13 | 2016-09-23 | 株式会社リコー | トナー、トナー収容ユニット及び画像形成装置 |
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