New retention aids, polyaluminium chloride (PAC), polyaluminium silicate sulfate (PASS), polyamines and alum_cationic polymer system have been developed for neutral rosin sizing.

• 为了适应中性松香造纸施胶的发展,聚合氯化铝(PAC)、碱式聚合硅酸硫酸铝(PASS)、聚胺和硫酸铝-阳离子聚合物体系等新沉淀剂被开发和研究。