A pulp paper silicone defoamer must be selected by the actual foaming system. Pulp processing, recycled paper, white water circulation, washing, bleaching and stock preparation can all create different foam stability and compatibility problems.
The first screening question is whether the buyer needs fast foam knockdown, long-term foam suppression or low residue. A defoamer that collapses foam quickly may still fail if foam returns during circulation, high shear or heating.
For initial comparison, review JY-210J Silicone defoamer for the pulp industry, JY-220J Pulp Industry Defoamer and related pulp products in the Defoaming Agents category.
Key test conditions include pulp type, pH, temperature, conductivity, dissolved solids, agitation level, dosage, dilution water and whether the defoamer affects drainage, paper defects, sizing, coating or downstream printing. Buyers should also check whether the product creates oil spots or deposits.
For recycled pulp and high-temperature lines, test foam suppression after repeated agitation and longer holding time. The selected grade should keep stable performance without harming paper quality or creating process contamination.
A request for defoamer samples should include the foaming medium, current defoamer, dosage, process temperature, pH range, foam height test method, target result, document need and annual consumption. This information helps Juyou route the inquiry to the correct pulp industry defoamer.