论文部分内容阅读
纸张施胶的目的是赋予纸张更好的抗液体渗透性能。链烯基琥珀酸酐(ASA)是一种常用于碱性造纸的合成施胶剂。ASA具有施胶的快速熟化性能,但如果和水接触,则会丧失其施胶功能。该文研究了造纸浆料中的Ca2+、HCO3-、沉淀碳酸钙(PCC)以及pH、温度对ASA在漂白硫酸盐桉木浆抄纸时施胶效果的影响。结果显示:组分中含有高浓度的Ca2+将降低ASA的施胶效果;组分中的HCO3-含量对ASA的施胶效果没有影响;在相对较高的PCC水平下正常施胶是可能的,如果必须在较高的填料水平下抄纸,最好增加浆料中ASA的用量;温度和pH是对施胶过程有影响的参数,高的温度和pH将降低ASA的施胶效果。
The purpose of paper sizing is to give the paper a better resistance to liquid penetration. Alkenyl succinic anhydride (ASA) is a synthetic sizing agent commonly used in alkaline papermaking. ASA has the sizing properties of fast maturation, but loses its sizing function when it comes in contact with water. In this paper, the effects of Ca2 +, HCO3-, PCC, pH and temperature on the sizing efficiency of bleached kraft eucalyptus pulp were studied. The results showed that the high concentration of Ca2 + could decrease the sizing effect of ASA. The content of HCO3- in the fraction had no effect on the sizing effect of ASA. Normal sizing at relatively high PCC level was possible, It is best to increase the amount of ASA in the slurry if papermaking must be done at higher filler levels; temperature and pH are parameters that affect the sizing process. High temperatures and pH will reduce ASA sizing.