The papermaking industry is a significant consumer of water and chemicals, and there is a constant drive towards more sustainable and efficient processes. Polyacrylamide (PAM), a versatile water-soluble polymer, plays a crucial role in achieving these goals by improving various stages of papermaking, from pulp treatment to effluent management.

In papermaking, PAM is primarily utilized for its excellent properties as a retention and drainage aid. During the papermaking process, fine fibers, fillers (like calcium carbonate or clay), and sizing agents are suspended in water. PAM, particularly specific grades of cationic or non-ionic polyacrylamide, effectively flocculates these components. This flocculation means that the fine particles and fillers are bound together, preventing them from passing through the forming fabric of the paper machine. This action significantly improves the retention rate of these valuable materials, reducing their loss into the white water system.

Improved retention leads to several benefits: a reduction in raw material costs, less material in the wastewater that needs treatment, and a more uniform and higher-quality paper product. Simultaneously, PAM acts as a drainage aid by promoting the release of water from the fiber slurry. The flocs formed by PAM are porous and allow water to pass through more easily, leading to faster dewatering on the paper machine. This increased drainage speed allows for higher machine speeds, thus boosting production capacity and reducing energy consumption associated with drying.

Beyond retention and drainage, PAM also contributes to the overall strength of the paper. The bridging action of the polymer between fibers can enhance both dry and wet strength properties, allowing for the production of stronger paper products or the reduction of fiber content while maintaining desired strength. Furthermore, PAM is valuable in treating the white water, the water recycled from the paper machine. By flocculating residual fibers and fillers, PAM helps clarify this water, enabling its reuse and reducing the overall water footprint of the mill. It also aids in the treatment of effluent, ensuring compliance with environmental discharge standards by effectively removing suspended solids.

The selection of the appropriate PAM for papermaking depends on factors such as the type of pulp, the fillers used, and the specific paper grades being produced. For instance, cationic PAM is often preferred for its strong affinity to negatively charged cellulose fibers and fillers. Proper preparation of PAM solutions, typically at low concentrations, and controlled addition are essential for maximizing its effectiveness and avoiding issues like over-flocculation or screen blinding.

Ningbo Inno Pharmchem Co., Ltd. is committed to supporting the papermaking industry with advanced polyacrylamide solutions. Our range of PAM products is designed to enhance operational efficiency, improve product quality, and promote environmental sustainability within your papermaking processes. By integrating PAM effectively, manufacturers can achieve significant improvements in cost savings and operational performance.