段超等人报道称,以OCC浆代替价格昂贵的未漂硫酸盐浆(UKP)来生产牛皮纸可提高牛皮纸生产企业的竞争力。但用OCC浆生产牛皮纸时,存在因印刷油墨及其他污染物使产品含大量重金属及其他危害物等问题。为提高OCC浆中油墨和重金属的去除率,在OCC浆揉搓段添加NaOH和Na2SiO3能使油墨从纤维表面分离,有效地去除OCC浆中的油墨,从而提高OCC浆中重金属的去除率。加碱揉搓能改善 Duan Chao et al reported that the use of OCC instead of expensive unbleached kraft pulp (UKP) to produce kraft paper can increase the competitiveness of kraft paper manufacturers. However, the use of OCC pulp kraft paper, there are printing inks and other contaminants make the product contains a lot of heavy metals and other hazards and other issues. In order to improve the removal rate of ink and heavy metal in OCC pulp, adding NaOH and Na2SiO3 in the rubbing stage of OCC pulp can separate the ink from the fiber surface and effectively remove the ink in OCC pulp, so as to improve the removal rate of heavy metals in OCC pulp. Add alkali rub can improve