I. Introduction

• Internal sizing: added before paper forming to provide overall water resistance

• Surface sizing: coated on paper surface to enhance strength and reduce dusting

• AKD: Dominant neutral sizing agent with long-lasting water resistance, widely used

• ASA: Fast reaction rate, suitable for high-speed paper machines; on-site emulsification required

• Rosin sizing agent: Traditional acidic product with low cost, gradually being replaced

II. Latest Industry News (2025–2026)

• Market growth: The global sizing agent market maintains steady growth driven by demand for paper packaging and food-grade cardboard. Neutral AKD and ASA are comprehensively replacing traditional rosin sizing agents.

• Green upgrading: Benzene-free, solvent-free and food-contact grade AKD becomes mainstream. Restrictions on PFAS-containing fluorinated waterproof agents in many countries accelerate the popularization of eco-friendly sizing solutions.

• Bio-based trend: Global leaders including BASF are developing biodegradable and bio-based sizing agents to meet demands of sustainable packaging.

• China’s export capacity: China has become the world’s major production and export base of AKD, supplying large volumes to Southeast and South Asia.

• Product upgrading: High anti-interference sizing agents specially designed for recycled pulp gain rising demand to support large-scale recycled paper production.

III. Future Trends