文档介绍：麦草一杨木混合浆生产中性高白度纸的研究
摘要
漂白杨木浆白度稳定性比漂白麦草浆要好,且漂白杨木一麦草混合浆(各50%) 的白度稳定性也远优于漂白麦草浆。,在漂白麦草浆中配用漂白杨木浆将明显提升了漂白麦草浆的性能.
研究结果表明,造纸湿部pH4J[~,阳离子助剂对纸料的吸附效果最好,碳酸钙填料吸附的化学药品最少,而且相对高的pH值有助于AKD施胶反应活化能的降低。AKD胶的浓度以1%左右分散性能和吸附能力最好,%左右时施胶效果最好。纸料的稀释使用白水时AKD的施胶效果好于使用清水,可能原因为自水中有部分未留着的AKD,实际上提高了系统中AKD的加入量.
直接染料对纤维素纤维的亲和力高,纤维易着色,而且色牢度高,特别是耐晒型直接染料的耐晒牢度达到4—5级,能够保证纸面色相的稳定性。VBK荧光增白剂是将’VBL进行改-挂后的产品,呈青光微紫,增白性能极好,溶解性好,反应好,经实验,该增白剂用量能达到15%N返黄,用量到6‰时,原料白度就能提高lq 110%(ISO),返黄值小,VBK是生产高白纸的最佳增白染料。
, N-g-CS—CPAM一硅铝微粒助留助滤体系又要胜于Cs一硅铝微粒助留助滤体系。硅铝微粒系统适合高剪切力-F4吏N,形成的絮聚体细小、紧密而牢固,脱水速度快, 滤液浊度低。
氧化淀粉加表面施胶剂SAA配合使用,具有良好的抗水功能和成膜能力,尤其适应高加填纸和细小组份含量高的纸种。SAA表面施胶剂与氧化淀粉配合,使得纸的表面强度提高了50~150%,表面吸水值下降了18%。
生产实践表明,采用中性造纸工艺、高效微粒助留助滤技术及合成表面施胶剂的纸表面处理技术,高配比草浆也能造出和全木浆相当质量的纸。生产的纸张各项物理指标均达到或超过国家标准,用户反馈,各项印刷性能良好。关键词:AKI)施胶;调色;硅铝微粒助留助滤;合成表面施胶荆;中性高白度纸.
Study on the mixed pulps of straw and popular
to neutral high brightness paper
Abstract
Bright stability of bleached popular pulp was better than that of bleached wheat straW was the blend of bleached popular and wheat straw pulp(50:50).It was found that physical strength of the blend of bleached popular and wheat straw pulp was between that of bleached popular pulp and that of bleached wheat straw of bleached wheat straw pulp could be obviously enhanced if bleached popular pulp was used in bleached wheat straw.
Results showed that when pH value in wet·end was controlled between and aids could be best adsorbed on furnish and least on filler addition high pH could help to reduce AKD sizing reactive AKD consistency was about 1%,its distribution and absorption were best and best sizing effectiveness was obtained as added in % sizing effectiveness when furnish was diluted with white water was better than with reason could be
that there was some not remained AKD in white water,actuall3)AKD was increased
in wet-en