Foam formation is a common challenge in the paper industry, especially during pulping, stock preparation, and wet-end operations. High levels of surfactants from recycled fibers, sizing agents, and process chemicals often lead to persistent foam, which can affect drainage, sheet formation, and overall machine efficiency. Without proper control, foam may cause overflow, reduced production speed, and quality defects in finished paper.
Rickman defoamer solutions are developed with these real operating conditions in mind. Beyond supplying a wide range of defoamer chemistries, Rickman works closely with paper mills to evaluate process parameters, recommend suitable formulations, and adjust products based on on-site feedback. With stable supply capability, technical support, and application-driven service, Rickman helps paper producers achieve consistent foam control and smoother long-term operations.
Click on the related products links：RK-50P（Highly Efficient Polyether Ester Antifoam）/RK-203（Mineral Oil-based Defoamer）
FAQ
Q1: How do I choose between silicone and polyether defoamers for my paper mill?
A: Selection depends on the specific process stage. Silicone defoamers are ideal for pulp washing and high-shear areas due to their rapid foam-breaking speed. Polyether defoamers are better suited for the wet-end and fine paper production, as they offer excellent compatibility with sizing agents and won't cause "oil spots" on the finished sheet.
A: While dosage varies by system load, a common starting point for high-efficiency polyether-based defoamers is approximately 0.05% of the total flow. We recommend conducting a jar test to optimize the dosage based on your specific surfactant levels.
A: When used correctly, high-quality defoamers like Rickman’s formulations are designed to have minimal impact. In fact, by removing entrapped air, they often improve drainage and sheet formation, which can indirectly enhance the physical strength properties of the paper.
A: Yes. Rickman offers specialized silicone-based and mineral oil-based defoamers that maintain stability and efficacy even in high-temperature and high-alkali pulping environments, ensuring continuous process stability.
Different defoamer types serve different needs in papermaking. Silicone defoamers typically offer fast knockdown and strong persistence, making them suitable for high-temperature or high-shear systems. Polyether defoamers, on the other hand, are valued for their compatibility with sizing agents and minimal impact on paper appearance, especially in fine paper and tissue production. Selecting the right defoamer requires balancing foam control efficiency with system compatibility and final product requirements.
Q2: What is the recommended dosage of defoamer in white water systems?
Q3: Can defoamers affect the sizing efficiency or paper strength?
Q4: Are Rickman defoamers stable in high-temperature pulping processes?