Cationic polyacrylamide(CPAM) which was prepared through complex initiation system in laboratory and cationic polyacrylamide(Ciba) were used as retention and drainage aids for bleached wheat straw pulp. The influences...Cationic polyacrylamide(CPAM) which was prepared through complex initiation system in laboratory and cationic polyacrylamide(Ciba) were used as retention and drainage aids for bleached wheat straw pulp. The influences of (polydiallyldimethlammonium chloride) PDADMAC and PDADMAC/CPAM on Zeta potential and drainability of pulp was investigated. The dual drainage and retention systems such as CPAM/modified bentonite, CPAM/colloidal SiO2, as well as their comparison between the two systems were discussed, and the optimal dosages of additives were determined. The results showed that: the complex systems can further enhance filler retention, drainability of pulp and strength properties of paper.展开更多
Surface sizing can improve the surface performances of paper. In this article we used surfacing sizing and ultra fine talcum powder to improve the quality of base paper. The results showed that the optimal formulation...Surface sizing can improve the surface performances of paper. In this article we used surfacing sizing and ultra fine talcum powder to improve the quality of base paper. The results showed that the optimal formulation is: sodium hexametaphosphate 0.4 parts, PC-01 25 parts and 100 parts ultra fine talcum powder. The solids content of coating is 18%. Surface sizing and low solids coating can improve brightness, opacity, IGT Pick resistance, and breaking length which were improved by 3.4%, 6.5%, 2.07m/sec and 700m separately than uncoated paper respectively. K and N ink absorption value was reduced from 62.1 to 34.6. The method can be used to produce base paper for art paper and ultra low weight coated paper (ULWC). It can reduce the cost of art paper.展开更多
Ink absorption is one of the most important factors which influence printing properties. This article had discussed the influence of coating properties, technologies of heating and pressure etc. on ink absorption and ...Ink absorption is one of the most important factors which influence printing properties. This article had discussed the influence of coating properties, technologies of heating and pressure etc. on ink absorption and showed that ink absorption can be adjusted and coating surface structure can be improved when technologies of heating and pressure change, pigment and adhesive altered.展开更多
High-reflectivity micro-glass bead, as a kind of retro-reflective material, is widely used in reflective fabric or film and other reflective coatings. But it is rarely used in coated paper. The retro-reflective theory...High-reflectivity micro-glass bead, as a kind of retro-reflective material, is widely used in reflective fabric or film and other reflective coatings. But it is rarely used in coated paper. The retro-reflective theory of micro-bead is described. Also the effect of size of micro-bead, dosage of binder and different color layers on reflective properties of coated paper are discussed in this article. The results show that its retro-reflective efficiency is good, equally to reflective fabric or film when the micro-glass bead is used in coated paper.展开更多
文摘Cationic polyacrylamide(CPAM) which was prepared through complex initiation system in laboratory and cationic polyacrylamide(Ciba) were used as retention and drainage aids for bleached wheat straw pulp. The influences of (polydiallyldimethlammonium chloride) PDADMAC and PDADMAC/CPAM on Zeta potential and drainability of pulp was investigated. The dual drainage and retention systems such as CPAM/modified bentonite, CPAM/colloidal SiO2, as well as their comparison between the two systems were discussed, and the optimal dosages of additives were determined. The results showed that: the complex systems can further enhance filler retention, drainability of pulp and strength properties of paper.
文摘Surface sizing can improve the surface performances of paper. In this article we used surfacing sizing and ultra fine talcum powder to improve the quality of base paper. The results showed that the optimal formulation is: sodium hexametaphosphate 0.4 parts, PC-01 25 parts and 100 parts ultra fine talcum powder. The solids content of coating is 18%. Surface sizing and low solids coating can improve brightness, opacity, IGT Pick resistance, and breaking length which were improved by 3.4%, 6.5%, 2.07m/sec and 700m separately than uncoated paper respectively. K and N ink absorption value was reduced from 62.1 to 34.6. The method can be used to produce base paper for art paper and ultra low weight coated paper (ULWC). It can reduce the cost of art paper.
文摘Ink absorption is one of the most important factors which influence printing properties. This article had discussed the influence of coating properties, technologies of heating and pressure etc. on ink absorption and showed that ink absorption can be adjusted and coating surface structure can be improved when technologies of heating and pressure change, pigment and adhesive altered.
文摘High-reflectivity micro-glass bead, as a kind of retro-reflective material, is widely used in reflective fabric or film and other reflective coatings. But it is rarely used in coated paper. The retro-reflective theory of micro-bead is described. Also the effect of size of micro-bead, dosage of binder and different color layers on reflective properties of coated paper are discussed in this article. The results show that its retro-reflective efficiency is good, equally to reflective fabric or film when the micro-glass bead is used in coated paper.
