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(AC)碱式聚合硅酸硫酸铝(ASS)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。