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首页> 外文会议>Global Symposium on Recycling, Waste Treatment and Clean Technology; 20040926-29; Madrid(ES) >INFLUENCE OF DIGITAL PRINTS AGEING ON PROCESS RECYCLING OF WASTE PAPER
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INFLUENCE OF DIGITAL PRINTS AGEING ON PROCESS RECYCLING OF WASTE PAPER

机译：数字打印老化对废纸回收过程的影响

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摘要

Recycled fibres have become greater and more important source of raw materials in grahpic paper production. The efficiency of this method depends on the technique and printing conditions, kind of ink and kind of printing substrate. Except the mentioned, the type and amount of chemicals used in processing stages, hydrodynamics of process, pH, pulp consistency, time of disintegration, slushing method and other chemical and physical operating conditions influence the efficiency of deinking operation. In the investigations presented in this work, the samples of multicolour digital and conventional offset prints were used. The prints were naturally and accelerated aged before deinking flotation. Some characteristics of the optical values before and after flotation were observed on handsheets. The investigation results show that natural ageing of prints influences the handsheet brightness, deinkability respectively. This influence is greater with conventional offset prints with the ink with greater ration of renewable raw materials. With handsheet after disintegration of the accelerated aged prints of digital offset printing, the decrease of the particle size and smaller increase of handsheet brightness can be noticed by the increase of ageing time. The investigation results show greater change of relative reflection of handsheet before and after deinking flotation in the function of accelerated ageing.
机译：在废纸生产中，再生纤维已成为越来越重要的原材料来源。该方法的效率取决于技术和印刷条件，油墨的种类和印刷基材的种类。除上述提及外，加工阶段所用化学药品的类型和数量，工艺的流体力学，pH，纸浆稠度，崩解时间，溶浆方法以及其他化学和物理操作条件都会影响脱墨操作的效率。在这项工作中提出的调查中，使用了彩色数字和常规胶版印刷的样本。在脱墨浮选之前，印刷品自然且加速老化。在手抄纸上观察到浮选前后光学值的一些特征。研究结果表明，印刷品的自然老化分别影响手抄纸的亮度和脱墨性。对于具有较大比例可再生原材料的传统胶版印刷，这种影响更大。在数字胶版印刷的加速老化印刷品解体后的手抄纸中，随着老化时间的增加，可以看到粒径的减小和手抄纸亮度的较小增加。研究结果表明，脱墨浮选前后手抄纸的相对反射变化具有加速老化的作用。

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