CaSiO3加填纸的可脱墨性及脱墨浆性能研究

Study on Deinkability and Properties of Deinked Pulp of CaSiO3-filled Paper

中文关键词:  CaSiO₃加填纸  脱墨性能  白度  胶黏物  纤维形态

Key Words:CaSiO₃-filled paper  deinking properties  brightness  stickies  fiber morphology

中文摘要:

      探讨了2种CaSiO₃加填印刷纸的脱墨性能。结果表明，以CaSiO₃为填料的1^#纸样和以CaSiO₃/滑石粉为填料的2^#纸样均具有较好的脱墨效果，二者浮选脱墨浆料得率相同，1^#浮选脱墨浆的白度为77.5% ISO，略高于2^#浮选脱墨浆的73.9% ISO，1^#浮选脱墨浆有效残余油墨浓度为81.24 mm²/m²，略低于2^#浮选脱墨浆的115.96 mm²/m²；在脱墨过程中，1^#纸样胶黏物去除效果略优于2^#纸样，2种纸样初始胶黏物含量均较低，不会对生产造成影响；2种纸样的碎解浆经浮选脱墨后纤维长度均有所降低，细小纤维含量增加，1^#浮选脱墨浆的纤维长度下降幅度略高于2^#浮选脱墨浆；受灰分影响，1^#浮选脱墨浆手抄片的强度指标较2^#浮选脱墨浆手抄片略差。

Abstract:

      The deinking properties of two types of CaSiO₃-filled paper were discussed. The results showed that both CaSiO₃-filled paper （1^#） and CaSiO₃/talc-filled paper （2^#） had good deinking effect， with comparable flotation deinking yields. The brightness of 1^# flotation deinking pulp was 77.5% ISO， slightly higher than that of 2^# flotation deinking pulp， which was 73.9% ISO. The ERIC of 1^# flotation deinking pulp was 81.24 mm²/m²， slightly lower than that of 2^# flotation deinking pulp of 115.96 mm²/m². In the deinking process， the removal effect of stickies of 1^# pulp was slightly better than 2^# pulp. The stickies contents of both 1^# and 2^# pulp were low and would not affect the production. After flotation deinking， the fiber lengths of 1^# and 2^# repulping pulp decreased，while the content of fines increased. The decrease of fiber length of 1^# pulp was slightly more than that of the 2^# pulp. Due to the ash existing in the pulp， the intensity index of 1^# paper was slightly lower than those of the 2^# paper.