REDUCING STICKIES DEPOSITION WITH PECTINASE IN OLD NEWSPRINT RECYCLING

摘要：

The anionic trash in DCS negatively affected the efficiency of cationic polymers and aggravated the stickies deposit, and polygalacturonic acid was believed as the main source of anionic trash in DCS. A pressure sensitive adhesive(PSA) was used as the model substance of microstickies in BDEP. The effect of dissolved and colloidal substances(DCS) from bleached chemi-thermo-mechanical pulp(BCTMP) and polygalacturonic acid(PGA) and their pectinase treatment on the efficiency of cationic polymers and stickies deposit were discussed.The results showed that the DCS from the BCTMP lowered the efficiency of cationic retention aids and deteriorated the stickies deposition. Pectinase treatment of DCS was beneficial to the stickies control, because polygalacturonic acid which was the main source of anionic trash was degraded. The cationic demand of DCS decreased after pectinase treatment, and the efficiency of cationic polymers was improved, so more stickies particles were adsorbed to the fibers, which cause the decrease of stickies deposition.

关键词： stickies deposition pectinase dissolved and colloidal substances pectic acid

作者: Congxiang Liu Zongquan Li Yang Gao Menghua Qin

作者单位: Key Laboratory of Paper Science & Technology of Ministry of Education, Shandong Polytechnic Universi Key Laboratory of Paper Science & Technology of Ministry of Education, Shandong Polytechnic Universi

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 1207-1211

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）