Paper industry

2025-03-28

I. Neutral Sizing Precipitant

Replacing Aluminum Sulfate:

PAC maintains high positive charge at pH 7.5 (neutral-alkaline conditions), overcoming the inefficiency of traditional aluminum sulfate in alkaline environments, enabling neutral sizing with rosin.

Cost Reduction & Quality Enhancement:

Supports calcium carbonate (CaCO₃) as filler, reducing fiber consumption and raw material costs;

Improves paper tensile strength, surface smoothness, and fold endurance.

II. Retention and Drainage Aid

Optimizing Raw Material Utilization:

Enhances retention of fine fibers and fillers through charge neutralization and adsorption bridging, reducing loss (retention rate increase);

Accelerates dewatering, improving paper machine drainage .

Paper Web Formation: Rapid floc formation strengthens precipitation, adapting to low-temperature water conditions .

III. Core Flocculant for Wastewater Treatment

Efficient Purification:

Rapidly precipitates suspended solids, reducing turbidity, COD (Chemical Oxygen Demand), and heavy metal ions;

Treats solid particles, organic pollutants, and nitrogen/phosphorus nutrients in papermaking wastewater .

Economic Advantage: Lower dosing cost and faster flocculation than traditional agents .

IV. Anionic Impurity Control

Capturing Interferants: High positive charge adsorbs anionic resins, stickies, etc., mitigating issues in closed whitewater systems .

Stabilizing Production: Reduces negative impacts of anionic impurities on pulp drainage and paper quality .

V. Product Process Adaptability

High-Purity White PAC: Used in high-end paper products to enhance whiteness and minimize iron ion residues ;

Process Selection:

Plate-frame/Spray PAC (high Al-content, low water-insoluble matter) suits paper wet-end ;

Rotary-drying PAC primarily for wastewater treatment .