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Application of the Dual Polymer Retention System of Cationic Cassava Residue in Deinked Pulp
  
DOI：10.11980/j.issn.0254-508X.2014.09.003
Key Words:cationic cassava residue  retention and drainage  polyaluminium chloride
Fund Project:863项目（编号2012AA101806）；国家科学基金项目（编号31270635）。
Author NameAffiliation
刘文静1，2 1.华南理工大学制浆造纸工程国家重点实验室，广东广州，510641；2.华南理工大学轻工与食品学院，广东广州，510641 
武书彬1，2，* 1.华南理工大学制浆造纸工程国家重点实验室，广东广州，510641；2.华南理工大学轻工与食品学院，广东广州，510641 
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Abstract:The impacts of different dual systems on retention, drainage and handsheet physical properties of deinked pulp were studied. The results showed that the PAC cationic cassava residue （CPCD）or cationic cassava residue bentonite dual retention and drainage systems could improve retention and drainage performances of the deinked furnish more significantly than the CPCD single retention system. The first pass retention of a dual retention and drainage system containing 0.6% PAC and 0.4%~0.6% cationic cassava residue increased by 11.4 percentage points, drainage increased to 294.4 gram in 60 seconds．Compared with the use of 0.5% cationic cassava residue alone, the dual system could also improve the strength of the paper product. The tensile index, tear index and burst index were increased by 7.52%, 19.0% and 5.33% respectively.
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