JP2006301344A - 導電性ローラ及びそれを備えた画像形成装置 - Google Patents
導電性ローラ及びそれを備えた画像形成装置 Download PDFInfo
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- JP2006301344A JP2006301344A JP2005123625A JP2005123625A JP2006301344A JP 2006301344 A JP2006301344 A JP 2006301344A JP 2005123625 A JP2005123625 A JP 2005123625A JP 2005123625 A JP2005123625 A JP 2005123625A JP 2006301344 A JP2006301344 A JP 2006301344A
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- conductive
- conductive roller
- roller
- water
- conductive agent
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Abstract
【解決手段】シャフト2と、該シャフト2の外周に形成された弾性層3と、該弾性層3の外周面に形成された少なくとも一層の樹脂被覆層4とを備えた導電性ローラ1において、前記樹脂被覆層が、水分散型紫外線硬化型樹脂、水溶性モノマー、微粒子及び導電剤を含有することを特徴とする導電性ローラ1、並びに、該導電性ローラ1を備えた画像形成装置である。
【選択図】図1
Description
サンニックスFA952[三洋化成工業株式会社製ポリエーテルポリオール、OH価=37]100質量部、SRX274C[東レダウコーニングシリコーン株式会社製整泡剤]1質量部、TOYOCAT NP[東ソー株式会社製アミン触媒]2.8質量部、TOYOCAT EP[東ソー株式会社製アミン触媒]1.5質量部及びサンフォームIC-716[三洋化成株式会社トリレンジイソシアネート]59質量部を機械的に撹拌して発泡させた。次に、内径16mm、長さ250mmで、表面をフッ素加工した金属製円筒型モールドの片側開口部から、外径8.0mm、長さ240mmの金属製シャフトを配置し、上記の発泡ポリウレタン原料8.0gを発泡機から注入した。次に、発泡ポリウレタン原料が注入されたモールドを80℃のオーブン中で20分間加熱した後脱型し、外径16mm、フォーム部分の全長が230mmのウレタンフォームからなる弾性層を備えたローラ本体を作製した。
次に、得られた導電性ローラを現像ローラとして画像形成装置に組み込み、初期の画像濃度、かぶりの有無、先後端濃度差、ハーフトーン斑の有無を公知の方法で評価し、更に10000枚印刷した後の現像ローラ表面のトナー付着の有無を調べた。これらの結果を表1に示す。
表1に示す配合の分散液を用いる以外は実施例1と同様にして導電性ローラを作製し、得られた導電性ローラを現像ローラとして組み込んだ画像形成装置の画質及び耐久性等を同様に評価した。結果を表1に示す。
2 シャフト
3 弾性層
4 樹脂被覆層
5 トナー
6 トナー供給ローラ
7 感光体
8 現像ローラ
9 成層ブレード
10 帯電ローラ
11 転写ローラ
12 クリーニング部
13 クリーニングブレード
Claims (10)
- シャフトと、該シャフトの外周に形成された弾性層と、該弾性層の外周面に形成された少なくとも一層の樹脂被覆層とを備えた導電性ローラにおいて、
前記樹脂被覆層が、水分散型紫外線硬化型樹脂、水溶性モノマー、微粒子及び導電剤を含有することを特徴とする導電性ローラ。 - 前記導電剤がカーボン系電子導電剤であることを特徴とする請求項1に記載の導電性ローラ。
- 前記カーボン系電子導電剤の含有量が、前記水分散型紫外線硬化型樹脂100質量部に対して0.1〜5質量部であることを特徴とする請求項2に記載の導電性ローラ。
- 前記導電剤がイオン導電剤であることを特徴とする請求項1に記載の導電性ローラ。
- 前記イオン導電剤の含有量が、前記水分散型紫外線硬化型樹脂100質量部に対して0.01〜30質量部であることを特徴とする請求項4に記載の導電性ローラ。
- 前記水分散型紫外線硬化型樹脂は、(メタ)アクリロイル基を有するポリマーを水に分散させてなる分散液を塗布し、乾燥させた後、紫外線照射により硬化させたものであることを特徴とする請求項1に記載の導電性ローラ。
- 前記分散液が更に紫外線硬化開始剤を含むことを特徴とする請求項6に記載の導電性ローラ。
- 前記導電剤がカーボン系電子導電剤であって、前記分散液が前記紫外線硬化開始剤を2種以上含有することを特徴とする請求項7に記載の導電性ローラ。
- 前記分散液が、紫外線硬化開始剤と増感剤とを含有することを特徴とする請求項7に記載の導電性ローラ。
- 請求項1〜9のいずれかに記載の導電性ローラを備えた画像形成装置。
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KR100869122B1 (ko) | 2007-07-20 | 2008-11-17 | 나노캠텍주식회사 | 프린터용 도전성 폴리우레탄 롤러의 제조방법 |
WO2008140020A1 (ja) * | 2007-05-11 | 2008-11-20 | Bridgestone Corporation | 導電性ローラ |
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WO2008140020A1 (ja) * | 2007-05-11 | 2008-11-20 | Bridgestone Corporation | 導電性ローラ |
JP2008280448A (ja) * | 2007-05-11 | 2008-11-20 | Bridgestone Corp | ポリウレタン発泡体及びそれを用いた導電性ローラ |
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JP2008292659A (ja) * | 2007-05-23 | 2008-12-04 | Tokai Rubber Ind Ltd | 電子写真機器用帯電ロール |
JP2009008894A (ja) * | 2007-06-28 | 2009-01-15 | Tokai Rubber Ind Ltd | 電子写真機器用現像ロール |
KR100869122B1 (ko) | 2007-07-20 | 2008-11-17 | 나노캠텍주식회사 | 프린터용 도전성 폴리우레탄 롤러의 제조방법 |
JP2009053259A (ja) * | 2007-08-23 | 2009-03-12 | Bridgestone Corp | 導電性ローラ |
JP2009069782A (ja) * | 2007-09-18 | 2009-04-02 | Tokai Rubber Ind Ltd | 電子写真機器用導電性組成物、電子写真機器用導電性架橋体および電子写真機器用導電性部材 |
JP2013120361A (ja) * | 2011-12-08 | 2013-06-17 | Canon Inc | 帯電部材及び帯電部材の製造方法 |
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