Application of Non-ionic Natural Organic Flocculant in Papermaking Production

Ⅰ. Application of non-ionic polyacrylamide in paper production

Many small and medium-sized paper mills use grass fibers or other fibers as raw materials in the paper industry. To improve product quality and increase output, various chemical reinforcing agents are often used. Non-ionic polyacrylamide is a large-scale aid used by the national paper industry. However, due to the high price, the application range is affected. Starch is used as a traditional papermaking additive, but its effect is not as good as that of non-ionic polyacrylamide. The Sinofloc non-ionic polyacrylamide just makes up for the shortcomings of the first two.

The relative molecular weight is greatly increased because the non-ionic polyacrylamide branch chain is connected to the starch molecular skeleton. The grafted branch chain's numerous amide groups form a hydrogen bond with the hydroxyl group of the pulp fiber or hemicellulose molecule, resulting in a strong adsorption effect. As a result, using starch graft copolymers as papermaking additives improves retention and drainage, increases paper strength, reduces costs, and increases economic benefits compared to general non-ionic polyacrylamide.

Ⅱ. Non-ionic polyacrylamide is used as a filter aid in papermaking

Nonionic polyacrylamide and modified starch are also commonly used as filter aids in papermaking. However, its effect is limited; they may cause excessive fiber aggregation while increasing water filtration, reducing the evenness and strength of the paper. When natural guar gum is used as a papermaking auxiliary, it can increase paper strength, reduce gray spot formation, and improve paper evenness. However, the disadvantage is that it is difficult to filter the water, resulting in a reduction in output or an increase in the load on the dryer section.

The chemically modified amphoteric or cationic guar gum overcomes this disadvantage to a large extent. Experiments have found that these modified guar gums can improve the drainage of the paper while maintaining or improving the uniformity of the paper; by adsorbing fine fibers and particles, it can further improve the drainage and increase the primary retention rate.

SINOFLOC chemical non-ionic polyacrylamide is developed for solid-liquid separation in the mining process to improve the performance of mineral processing and mine wastewater treatment systems. They can also help precipitation in water clarification and are used with coagulants for charge neutralization. , And provide good cost-effectiveness.