Brief Discussion on the Properties of Surface Sizing Agents

Surface sizing agents are essential in improving the quality and functionality of paper products, particularly boxboard and corrugated paper. Below are the key properties and benefits of surface sizing agents:

1. Improved Water Resistance and Ring Compression Strength:
Surface sizing agents are designed to enhance the water resistance of paper, which is crucial for packaging materials like boxboard and corrugated paper. They form a protective layer on the paper's surface, reducing water absorption and improving its resistance to moisture. Additionally, surface sizing improves ring compression strength, which increases the paper's ability to withstand pressure and handling, making it more durable for packaging applications.

2. Replacement for Internal Sizing Agents:
Surface sizing agents can effectively replace internal sizing agents, which are typically added during the pulp production stage. By applying sizing agents to the surface of the paper instead of mixing them into the pulp, paper manufacturers can achieve similar or improved properties, such as water resistance, while streamlining the production process and reducing material costs.

3. Reduction of Sizing Costs with Raw Starch:
When used in conjunction with raw starch, surface sizing agents help reduce the overall sizing cost. The combination of raw starch with surface sizing agents enhances the sizing effect while decreasing the need for more expensive chemical sizing agents, providing a cost-effective alternative for paper manufacturers.

4. Excellent Mechanical Stability and Reduced Bubbles:
Surface sizing agents offer excellent mechanical stability during application, ensuring a consistent and reliable sizing effect throughout the production process. Additionally, they generate fewer bubbles during operation, which contributes to a smoother surface on the paper and minimizes defects, leading to better overall product quality.

In conclusion, surface sizing agents are integral to enhancing paper strength, water resistance, and overall performance while also offering cost-saving benefits and improving the efficiency of the paper production process.