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Mono-Component Electret Toner for Color Photocopy Machines and Laser Printers

用于彩色复印机和激光打印机的单组份驻极体碳粉

基本信息

批准号：
09650341
负责人：
TAKAUCHI Manabu
金额：
$ 1.73万
依托单位：
IBARAKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Application of toners, which had been charged before use, was tried to the development in photocopy machines and laser printers. First, toners were charged by tribocharging, corona-charging and electron beam irradiation, and charge keeping characteristics of toners were examined. The toner, when charged by tribocharging, kept its charge for the longest period among the three ways of charging. Plasma treatment was applied to the toners to improve its charge maintaining ability. As a result, fluorine plasma treatment was found to increase the time constant considerably for charge decay from charged toner. In addition, the fluorine plasma treatment shifted charging tendency of the toner in negative direction. On the other hand, argon plasma treatment of toners decreased their charge maintaining ability and shifted their charging tendency in positive direction. However, the fluorine plasma treatment gave wrong influence of fixing.Thermally stimulated charge decay (TSCD) measurements were carried out on charged polymer layers to study the charge decay mechanism from toners. The trap depths in polypropylene were 0.99eV, 1.2eV and 0.19eV for positive corona-charging, negative corona-charging and tribocharging, respectively. These values are large enough for long term charge maintaining in toners. Thermally stimulated current (TSC) measurements were made on polymers containing charge control agent (CCA). Trapping sites were found to be located between the polymer and CCA.Finally, change in toner charge associated with handling, such as agitation, transport, etc. was examined, which should be cleared for practical applications.

在复印机和激光打印机中，尝试了使用前已充电的墨粉的应用。首先，通过摩擦充电、电晕充电和电子束照射使调色剂带电，并且检查调色剂的电荷保持特性。在三种充电方式中，当通过摩擦充电充电时，墨粉保持其电荷的时间最长。对墨粉进行等离子体处理以提高其电荷保持能力。结果，发现氟等离子体处理显著增加了来自带电调色剂的电荷衰减的时间常数。此外，氟等离子体处理使调色剂的带电趋势向负方向移动。另一方面，氩等离子体处理的调色剂降低其电荷保持能力，并改变其充电倾向的正方向。然而，氟等离子体处理给定影带来了错误的影响。热刺激电荷衰减（TSCD）测量进行了带电聚合物层，以研究电荷衰减机制从调色剂。聚丙烯在正电晕充电、负电晕充电和摩擦充电时的陷阱深度分别为0.99eV、1.2eV和0.19eV。这些值对于调色剂中的长期电荷保持来说足够大。对含有电荷控制剂（CCA）的聚合物进行热刺激电流（TSC）测量。最后，研究了在搅拌、运输等操作过程中墨粉电荷的变化，这对于实际应用是必要的。