废纸碎解条件对油墨老化的旧报刊废纸脱墨效果的影响

Effect of Pulping Condition on Deinking Efficiency of Aged Newspaper and Magazine Wastepaper

采用二段碎浆的方式,得出了废纸碎解条件影响油墨已老化的旧报刊废纸脱墨效果的趋势,分析了造成这一趋势的原因。结果显示:碎浆浓度和时间是影响脱墨效果的最重要因素,脱墨剂及Na2SiO3次之。采用二段碎浆工艺,可使出纸墨点数<250个/m2,白度>56%SBD。

The effect of pulping condition on the deinking efficiency of aged newspaper and magazine wastepaper in two-stage pulping process was studied. The results indicated that pulping consistency and pulping time was the most important factors influencing the deinking efficiency, and adding deinking chemicals and Na2SiO3 was of benefit to the deinking. The bleached deinked pulp could reach the quality of more than 56%SBD brightness and less than 250/m2 dirt count when two-stage pulping process is used.