Dry Strength Agent (Introduction + Industry News)
Conventional type: Cationic starch (high cost performance, largest consumption);
High-performance type: Amphoteric / cationic polyacrylamide, synthetic dry strength resin (low dosage, excellent performance);
Eco-friendly type: Bio-based dry strength agents such as lignin and chitosan.
Applicable paper grades: Corrugated paper, linerboard, paperboard, printing & writing paper and most other paper types.Key difference: Dry strength agents only work for dry paper; strength disappears when soaked in water. Wet strength agents maintain paper strength under wet conditions.
Rising demand: Stable consumption of packaging paper and express cartons. Degraded strength of recycled fibers forces paper mills to increase dry strength agent dosage, supporting steady market growth.
Accelerated product upgrading: Conventional starch is gradually replaced by high-efficiency synthetic dry strength resins. Featuring lower dosage, less burden on white water and better overall cost, such resins have become mainstream for large paper manufacturers.
Green development trend: Driven by carbon peaking & carbon neutrality goals and stricter environmental regulations, low-COD, bio-based and biodegradable dry strength agents are key R&D and promotion focuses, while highly polluting low-efficiency products are phased out.
Industry landscape: Fierce low-price competition for low-end products. Additive suppliers offering high-end customized formulas and supporting process services gain better profits. Fluctuating raw material prices constitute major cost pressure.
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