复印粉的粉碎分级技术

本文介绍了利用国产气流粉碎机和余气萃取分级制备复印粉的实用技术，并展示了粉碎分级系统和复印粉的电镜照片。     

Synthesis and characterization of styrenic‐based polymerized toner and its composite for electrophotographic printing

Suspension polymerization in an aqueous medium was applied to the syntheses of styrenic‐based polymerized toner particles. Poly(vinyl alcohol) and benzoyl peroxide were used as a dispersant and an initiator, respectively. The resulting polymerized toners were found to be smooth on their spherical surfaces, and the particle sizes were 4–10 μm with a coefficient of variation of 20–30%. In most cases, a correlation between small particle sizes with high weight‐average molecular weights was observed. The glass‐transition temperature (T_g) of the polymerized toner could be controlled by the molar ratio of the comonomer between styrene and n‐butyl acrylate (nBA). T_g decreased when the content of nBA in copolymer increased, due to its rubbery state along with the increasing carbon black feed level, because the surface functional groups of the carbon black pigment inhibited the rate of polymerization and decreased the molecular weight of the resulting polymerized toners. The T_g's of the resulting polymerized toners were 66–70°C. Triboelectricity [the charge‐to‐mass ratio (q/m)] of the resulting polymerized toners was 7–20 μCg^?1 in the presence of borobis(1,1‐diphenyl‐1‐oxo‐acetyl)potassium salt. An analysis of print quality showed high background fog, low maximum density, and a small amount of image raggedness. The print result correlated with the q/m values. This article elucidates the polymerization technique, charging properties, and image qualities. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 238–248, 2003     

废弃墨粉的再生机理及工艺

将被废弃的激光打印机或复印机用墨粉进行再生,首先用清洗、干燥、分选等方法对废墨粉进行处理,再按传统生产墨粉的工艺,经预混、混炼、粉碎、分级、外添等重新制作新品种的墨粉粉体.再生后的不同品种的墨粉,它用在激光打印机或复印机上,同原厂制造的墨粉一样优异.     

AC-10Ⅰ彩色沥青混合料配合比设计与施工

通过彩色沥青在潍坊市景观道路施工中的应用,介绍了使用合成路面胶结料与色粉进行彩色路面的配合比设计及施工,并积累了较为丰富的试验数据,为今后类似工程的施工提供了参考。     

Xerographic printing of textiles: Polymeric toners and their performance

Xerographic printing of a number of common fabrics was investigated. The role of the polymeric binder used for the formulation of the commercially available and custom‐made toners was investigated. Fabric performance tests (crockfastness), friction tests, and morphological investigations using scanning electron microscopy were performed. The intricate relations of toner and fabric properties with the results of an important overall industrial performance test for fabrics (crockfastness) are discussed. Both cohesive and adhesive toner failure can be important. Improved toner performance was achieved with a thermoset polymer as the toner binder. However, curing times for the thermoset polymer used are not sufficiently short for high‐speed industrial printing. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2425–2434, 2000     

硫铁矿烧渣制备静电复印显影剂用Fe3O4

硫铁矿烧渣是生产硫酸时产生的固体废弃物。硫铁矿烧渣经硫酸浸出,用机械活化的硫铁矿还原,过滤得到硫酸亚铁溶液。以此溶液为原料,采用空气氧化法制备显影剂用Fe3O4。研究了FeSO4浓度、碱种类、pH值、空气流量和温度对产品性能的影响,用XRD、SEM、粒度分析和磁性能测试等手段对产品进行了表征。结果表明,在最佳工艺条件下得到了球形Fe3O4,粒度分布范围为0.1～0.5μm,磁饱和强度为96.2Am2/kg,矫顽力为10.7kA/m,满足静电复印显影剂对磁粉的要求。     

油墨种类和印刷方法及其对浮选脱墨的影响

介绍了油墨的成分、种类及其特性,并介绍了印刷方法对油墨特性和浮选脱墨的影响.     

原位乳液聚合制备聚合墨粉用含蜡苯丙复合乳液及其性能研究

采用核壳乳液聚合的方法,以苯乙烯、丙烯酸丁酯和丙烯酸为共聚单体,原位制备了聚合墨粉用含蜡苯丙复合乳液。探讨了巴西棕榈蜡用量对单体转化率、凝聚率、复合乳液粒径及其分布、Zeta电位、共聚物的玻璃化转变温度以及相对分子质量及其分布的影响。结果表明,巴西棕榈蜡的加入对聚合稳定性影响不大;随着其用量的增加,乳液粒径、Zeta电位、聚合物玻璃化转变温度降低,而相对分子质量增大。当其用量为3%(wt)时,聚合物具有较适宜的Tg和相对分子质量,分别为65.9℃和89,000。     

墨粉与感光鼓性能对激光输出图像质量的影响

通过对墨粉显微图像、粒度分布、带电量及对感光鼓光电性能的分析,并根据输出图像密度、点、线、文本质量的客观数据化检测,得到只有墨粉颗粒粒径、带电量与感光鼓表面电位相匹配,并且感光鼓电位均匀稳定,才能打印出好的图像质量,否则将会出现底灰,密度不均匀,文字、线条边缘粗糙等现象。     

废弃硒鼓资源化技术研究

硒鼓作为核心部件被广泛应用于激光打印机、复印机和传真机中。随着硒鼓的报废量逐年增大,废弃硒鼓的无害化处理和资源化利用越来越受到人们的关注。主要介绍了废弃硒鼓的材料组分、可资源化性和残留墨粉的环境危害性,总结了国内外废弃硒鼓资源化技术和特点,并提出了废弃硒鼓资源化技术中存在的问题,为未来废弃硒鼓资源化技术的改进提供建设性意见。