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首页> 外文会议>New Technologies in Non-wood Fiber Pulping and Papermaking >PERFORMANCE EVALUATION OF ACIDIC, AKD AND ASA SIZING OF STRAW BASED WRITING PRINTING PAPER
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PERFORMANCE EVALUATION OF ACIDIC, AKD AND ASA SIZING OF STRAW BASED WRITING PRINTING PAPER

机译：基于草浆的书面印刷纸的酸，AKD和ASA尺寸的性能评估

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Wheat straw pulp has low values of brightness i.e. 78%～80% GE and pale yellow shade. In acidic sizing system with straw pulp and soap stone filler i.e. magnesium silicate, optical properties can't be enhanced to cope with market accessible imported paper that has very high values of brightness, whiteness, and opacity. By keeping in mind the potential benefits of alkaline sizing system, AKD (Alkene Ketene Dimer) & ASA (Alkenyl Succinic Anhydride) have been tried on wheat straw based writing printing paper with CaCO_3 as filler. High values of brightness, whiteness, opacity and porosity 92% GE, 88% CIE, 94% and 350 mL/min respectively have been achieved in alkaline sizing system. Tendency of foam generation has remarkably reduced in alkaline system but slime formation tendency is a bit more. Similarly environmental loads are reduced due to lower values of COD & BOD. High amounts of alkaline sizing chemicals are used due to the presence of fines as compared to wood pulp. In AKD sizing, Curing time is about 24～36 h while in ASA sizing, on machine-cured product is produced. Due to better compatibility of sizing chemicals, retention aid and fixatives, higher total ash retention and brightness values are achieved in ASA paper as compared to AKD. ASA emulsion hydrolization tendency is more in hot season. In this paper, trial histories of AKD and ASA are presented. In the end, performance of the three sizing systems is evaluated.
机译：麦草浆的亮度值较低，即GE为78％〜80％，色泽为浅黄色。在使用草浆和肥皂石填料（即硅酸镁）的酸性施胶系统中，无法提高光学性能以应对具有很高的亮度，白度和不透明度值的市场上可买到的进口纸。考虑到碱性施胶系统的潜在好处，已在以CaCO_3为填充剂的麦草基书写印刷纸上尝试了AKD（烯基酮二聚体）和ASA（烯基琥珀酸酐）。在碱性施胶系统中，分别获得了92％GE，88％CIE，94％和350 mL / min的高亮度，白度，不透明度和孔隙率值。在碱性体系中，泡沫的产生趋势已显着降低，但粘液形成的趋势要大一些。同样，由于COD和BOD值较低，因此减少了环境负荷。与木浆相比，由于存在细粉，因此使用了大量的碱性施胶剂。在AKD上浆中，固化时间约为24到36小时，而在ASA上浆中，则生产机固化产品。由于上浆化学品，助留剂和固定剂具有更好的相容性，与AKD相比，ASA纸可实现更高的总灰分保留和亮度值。在炎热季节，ASA乳液的水解趋势更大。本文介绍了AKD和ASA的试用历史。最后，评估了三个上浆系统的性能。

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