The application fields of polyacrylamide in the papermaking industry

In the papermaking industry, as a papermaking chemical, its effectiveness cannot be compared to a single characteristic of PAM, especially in terms of retention and filtration, it can improve the speed of offline filtration and reduce the loss of fiber fillers. It has a promoting and compensating effect on the smoothness and strength of the finished paper.

Polyacrylamide is used in the production process of whiteboard paper, copperboard paper, cardboard, typing paper, etc., using wood pulp, straw pulp, and waste pulp as raw materials. Mainly used as a paper reinforcing agent, microfiber and filler retention aid, and filter aid in the papermaking process. Dispersants, flocculants, as well as air flotation machines and sludge dewatering for wastewater treatment from papermaking.

Retention and filtration aids:

Polyacrylamide can increase the retention of web fibers and other wet end additives, accelerate the filtration and dehydration of the web, significantly increase the ash retention rate, and increase the first layer retention rate of fibers by an average of more than 10%, improving the retention of starch and creating favorable conditions for using starch as an interlayer reinforcing agent. The increase in paper sales profits can also save on filling costs. The water filtration performance is significantly improved, thereby ensuring a corresponding increase in vehicle speed.

8-10% (average). Generally speaking, high molecular weight polymers have better retention performance, while low molecular weight polymers have better filtration performance.

Enhancers;

It can effectively improve the strength of paper, improve the surface properties and printing performance of paper.

Dispersant:

Can improve the uniformity of paper pages.

Flocculant:

It can be used as a flocculant for pulp wastewater treatment to remove organic parts from the wastewater. When combined with inorganic flocculants, it can bridge out sediment and achieve a removal rate of 70-80%. Reduce the problem of excessive COD in wastewater.

Solve the adhesive problem caused by waste paper raw materials. Due to the use of waste paper as raw material, especially the adhesives, additives, and impurities contained in waste cardboard boxes, they often adhere to the mesh, blankets, rollers, and drying cylinders of the paper machine, causing serious production problems. Polyacrylamide for papermaking can effectively help solve the problem through adsorption, dispersion, and flocculation principles

Adhesive issues.

Application and usage ratio concentration in the papermaking industry:

Pulp retention, filtration, interruption of wastewater recovery, air flotation machine and sludge dewatering.

Products used: anions, cations (1 ‰ -2 ‰).