AKD Surface Sizing Agent

Cationic AKD Surface Sizing Agent LY-AKD302 for Corrugated & Packaging Board

LY-AKD302 is a newly developed, highly efficient cationic AKD surface sizing agent synthesized through the copolymerization of multiple advanced polymeric materials. Formulated specifically for size press applications, this advanced emulsion crosslinks seamlessly with surface-applied starch solutions.

By forming a dense, hydrophobic coating layer on the paper surface, LY-AKD302 imparts outstanding water resistance while substantially improving the mechanical film strength of the starch layer. It provides modern packaging paper lines with an easy-to-operate solution that curtails curing times, optimizes energy consumption, and boosts overall mill throughput.

Technical Specifications & Parameters

Property / Indicator	Technical Standard
Appearance	Milky white liquid
Solid Content	(15%, 18%, 30%) ± 1%
Viscosity (25°C)	≤ 50 mPa·s
pH Value	2.0 – 4.0
Ionic Charge Type	Cationic
Solubility	Dissolves easily in cold water

Core Technical Advantages & Value Proposition

1. Robust Synergy with Surface Starch Coatings

LY-AKD302 possesses strong chemical compatibility and affinity with gelatinized starch molecules. Upon application via the size press, it integrates into the starch matrix, upgrading a standard sizing starch into a high-barrier coating that gives excellent water repellency and uniform surface strength across the entire paper web.

2. Significant Boost to Ring Crush Strength & Burst Index

For industrial packaging mills, sheet strength under load is paramount. LY-AKD302 enhances fiber bonding at the surface layer, directly driving up the Ring Compression Strength (RCT) and the Burst Index (wear resistance index). This structural reinforcement ensures that heavy-duty boxes and linerboards maintain their shape under high-stress warehousing and transport conditions.

3. Rapid Curing & Moisture Reversion Resistance

A major drawback of conventional internal AKD sizing is the extended warehouse maturation time required to reach full sizing values. LY-AKD302 cuts curing times down drastically. The rapid film-forming action prevents the paper from absorbing ambient moisture or “reverting” during storage, protecting the paper’s long-term durability.

4. Simplified Wastewater Management & High Process Efficiency

As a surface application agent, LY-AKD302 limits chemical carryover into the wet-end white water loop. This clean separation facilitates easier wastewater treatment processes, diminishes chemical oxygen demand (COD) loads, lowers overall energy consumption, and optimizes machine production efficiency.

Application & Dosage Guidelines

To ensure stable sizing values and flawless size press operation, adhere to the following guidelines:

• Application Method: The product can be mixed directly into pre-gelatinized starch solutions with thorough stirring before application. Alternatively, it can be dosed continuously via a precision chemical metering pump into the starch supply line right before it hits the sizing machine.
• Recommended Dosage: Typically 5 to 10 kg of LY-AKD302 per ton of paper, depending on the target Cobb value and base sheet parameters.

Main Product Applications

LY-AKD302 is engineered for a diverse selection of high-speed surface sizing lines, showing excellent results in:

• Industrial Packaging Papers: Corrugated paper, test liners, fluting mediums, and kraft boxboards requiring rigid structural parameters and liquid resistance.
• Commercial Printing Papers: Fine printing-and-writing papers, culture papers, and coated copper-board papers.

Packaging, Storage & Handling

• Packaging Options: Packaged in durable 200 kg plastic drums or 1,000 kg IBC containers to ensure safe transport and simple hookups to automated mill dosing stations.
• Storage Environment: Store within a clean, dry, and well-ventilated warehouse environment at temperatures between 5°C and 30°C. Protect against freezing temperatures and direct sunlight exposure.
• Shelf Life: 3 months from the manufacturing date under original, unopened and sealed conditions.