Foam in pulp and paper processes is generated during pulping, washing, screening, and paper machine circulation. High-speed agitation, residual chemicals, and fiber fines contribute to persistent foam. This foam reduces drainage efficiency, causes sheet defects, and disrupts vacuum systems. Additionally, white water loops continuously recycle foam, making control more challenging.
Another difficulty is that defoamers must not interfere with retention systems, sizing agents, or coating performance. Silicone residues may lead to surface defects, while insufficient defoaming leads to operational instability. High-speed paper machines also require defoamers with excellent dispersion and fast action.
Our solution involves selecting defoamers based on process location. Polyether defoamers are suitable for white water systems where low residue is critical. Silicone-based defoamers are applied in pulping and stock preparation where strong foam suppression is required. Hybrid defoamers provide balanced performance in multi-stage systems.
Controlled dosing ensures continuous foam suppression without affecting paper quality. Compatibility testing with retention aids and fillers ensures stable production. Long-lasting defoaming performance reduces chemical consumption and improves process efficiency.
This integrated solution enhances drainage efficiency, stabilizes machine operation, and improves paper surface quality.
English
