APPLICATION OF CPAM/ BENTONITE MICROPARTICLE RETENTION AND DRAINAGE AID SYSTEM ON HIGH-STRENGTH CORRUGATED BASE PAPER
The effects of Cationic Polyacrylamide (CPAM)/bentonite microparticle retention and drainage aid system on stock retention and drainage as well as sheet properties were studied by simulating the wet process of high-strength corrugated base paper production. The results showed that when the dosage of bentonite was 0.2％ and that of CPAM was lower than 0.02％, the effects of CPAM/bentonite microparticle retention and drainage system were similar to CPAM system; CPAM/bentonite microparticle retention and drainage aid system obtained good stock retention and drainage effects only when the dosage of CPAM was large enough, the effects of the CPAM/bentonite microparticle retention and drainage system is up to the maximum when the dosage of CPAM was 0.04％. After CPAM was added into stock, changing the shear strength of stock prior to the addition of bentonite had no obvious change in the retention effect. However, after CPAM and bentonite were all added into the stock, the retention effect was sensitive to shearing forces. Various stock shear strength had significant influence on the stock retention and drainage, when the shearing force was beyond a certain range, the final flocs could be destroyed, which leading to a decrease of the retention, so the stir speed should not exceed 750 rpm. The breaking length of paper increased with the increase of the dosage of CPAM within a certain limit, but the ring crush index of paper decreased with the increase of the dosage of CPAM. However, when the dosage of CPAM reached 0.04％, the ring crush index increased with the increase of CPAM slightly. The breaking length and the ring crush index of the handsheets made from CPAM/bentonite dual system was slightly lower than that of the handsheets made from CPAM monocomponent system.
CPAM bentonite microparticle retention and drainage aid system high-strength corrugated base paper
Sha Lizheng Zhao Huifang
School of Light Industry, Zhejiang University of Science & Technology, Hangzhou, 310023,China
国际会议
广州
英文
1570-1573
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）