Recycled pulp and paper processing can create persistent foam because of surfactants, dissolved organic matter, fillers and high circulation. A pulp paper silicone defoamer should be tested under real process temperature and water quality.
High temperature conditions can change defoamer dispersion, persistence and compatibility. A paper mill antifoam silicone product should suppress foam without causing oil spots, paper defects, deposits or downstream coating and printing problems.
Buyers can compare JY-210J Pulp Industry Defoamer, JY-220J Pulp Industry Defoamer and JY-230J Pulp Industry Defoamer according to process temperature, pH and foam behavior.
A good lab protocol includes initial foam height, collapse time, repeated agitation, temperature hold, compatibility observation and impact on drainage or paper quality. The test should use real white water or process water when possible.
When requesting a sample, provide recycled pulp ratio, foaming location, temperature, pH, current defoamer dosage, water quality, target result and document needs. This lets Juyou recommend a closer pulp defoamer route.