Analysis of Working Mechanisms of Papermaking Chemicals

Papermaking chemicals are divided into five main categories by working ps: scale inhibitors, chelating agents, bactericides and algaecides, defoamers and decolorizing flocculants, each with distinct working mechanisms. 1. Organic phosphine/polycarboxylate scale inhibitors: They bind silicon, calcium and magnesium ions through three effects including lattice distortion, chelation and dispersion to restrain crystal adhesion on equipment. 2. Chelating agents (DTPMP, HEDP): They form stable soluble complexes with heavy metal ions to avoid bleaching agent decomposition and fabric color spots. 3. Quaternary ammonium salt bactericides: They destroy the protein structure of bacterial and algal cell membranes to kill microorganisms in white water systems and prevent mesh blockage caused by sludge. 4. Polyether/silicone defoamers: They reduce foam surface tension to eliminate foam generated in cooking and papermaking, avoiding holes and defects on paper sheets. 5. Decolorizing flocculants: They realize charge neutralization and adsorption bridging to flocculate dye suspended solids in water and reduce wastewater chroma. Kairui Chemistry can compound different types of chemicals according to the actual operating conditions of paper mills to maximize chemical efficiency and lower overall chemical costs.