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首页> 外文期刊>Wochenblatt fur papierfabrikation >Fixatives for Controlling of Detrimental Substances in the Production of Mechanical Printing Papers
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Fixatives for Controlling of Detrimental Substances in the Production of Mechanical Printing Papers

机译：用于控制机械印刷纸生产中有害物质的固定剂

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Problems in paper production caused by higher reduction of water consumption beginning around 1980 led to the intensive examination of "detrimental substances " which has not diminished in importance through the years.Due to the increased use of calcium carbonate which in turn limited the use of alum,a substance previously used by paper makers as a cure-all,chemical suppliers developed a formerly unknown group of chemical additives:the fixing agents.There are a number of products based on various chemical structures now currently on the market,all of which at a relatively low molecular weight and a relatively high cationic charge.Detrimental substances in a paper mill's water circuit,which are measured as cationic demand,are currently controlled through the dosage of synthetic fixing agents rather than with alum and aluminum substances.Fixing agents,in comparison to alum,constitute a smaller percentage of the overall chemical share required in paper industry but are nevertheless essential.This presentation will first describe the chemical basis of the different products and the interaction with anionic disturbing substances.There will then be a comparison of different strategies in combating disturbing substances based on a SC and LWCpaper mill.In the present mill case the elimination of detrimental substances is primarily executed over the reject path rather than fixed in the paper which represents a different strategy to eliminate the trash.It is not possible to directly detect fixatives in the water loops which would be needed to account for the loss and flow of the polymers.They have to be determined indirectly through lab trials examining the polymer absorption behavior of fibers and fillers.This provides sufficient information to showthatin the mill case fixing agents are nearly entirely removed through the reject.Subsequently it can be concluded that the substances fixed in the pulp will entirely end in the paper when the elimination path over the final product is chosen.
机译：从1980年左右开始，由于用水量减少，造纸问题导致了对“有害物质”的深入研究，这些年来，这种物质的重要性并没有减弱。由于碳酸钙的使用增加，这反过来又限制了明矾的使用，明矾是造纸商以前用作万能药的物质，化学品供应商开发了一组以前未知的化学添加剂：固色剂。目前市场上有许多基于各种化学结构的产品，这些产品都具有相对较低的分子量和相对较高的阳离子电荷。造纸厂水回路中的有害物质，以阳离子需求量来衡量，目前通过合成固色剂的剂量而不是明矾和铝物质来控制。与明矾相比，固色剂在造纸工业所需的总化学品份额中所占比例较小，但仍然是必不可少的。本演讲将首先描述不同产品的化学基础以及与阴离子干扰物质的相互作用。然后，将基于SC和LWC论文对打击干扰物质的不同策略进行比较，mill.In 本工厂案例中，有害物质的消除主要是在废品路径上执行的，而不是固定在纸上，这代表了消除垃圾的不同策略。无法直接检测水回路中的固定剂，而固定剂是解释聚合物损失和流动所必需的。它们必须通过检查纤维和填料的聚合物吸收行为的实验室试验来间接确定。这提供了足够的信息来表明，在磨机壳体中，固定剂几乎完全通过废品去除。随后可以得出结论，当选择最终产品的消除路径时，固定在纸浆中的物质将完全在纸张中结束。

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