In the papermaking production process, foam is a common and troublesome problem. From pulping and washing to papermaking and coating, almost every process may generate a large amount of foam due to mechanical stirring, chemical additives or the characteristics of the pulp. Such foam not only causes the pulp to overflow the tank and affects the cleanliness and safety of the production environment but also directly causes quality defects such as holes in the paper sheet, poor formation and uneven sizing or coating, and in severe cases even leads to paper breakage, reducing production efficiency and wasting raw materials.
Common defoaming products on the market often face challenges: some have a strong instant foam-breaking ability but insufficient durability in foam suppression and require frequent addition; some have poor compatibility with the pulp system and may produce oil spots or affect the effectiveness of subsequent chemicals; and some have poor stability under high-temperature or high-shear process conditions, causing the defoaming effect to fluctuate. These pain points are directly related to the continuity of production and the final quality of the product.
In response to these core needs, Chemi Tech, relying on its deep technical accumulation, has developed a series of high-efficiency papermaking defoamers. Our solution does not simply provide a product but begins with systematic on-site diagnosis. First, the technical team will deeply analyze key parameters such as the specific process stage where foam is generated, the pulp composition, the pH value and the temperature, and precisely locate the root cause of the foam. Then, based on the analysis results, we select the most matching defoamer model from our water-based, oil-based or composite product series to ensure perfect compatibility with your process system.
The specific implementation steps are clear and definite: The first step is to conduct a laboratory small-scale test, simulating production conditions to evaluate the defoaming speed and the foam-suppressing duration and to determine a preliminary addition ratio. The second step is to arrange a pilot test, adding at a low flow rate at a specific point on the production line, observing in real time the foam control effect and its impact on paper quality, and optimizing the addition point and dosage. The third step is full roll-out and stable operation, with full-process technical tracking to ensure that the defoamer delivers stable effectiveness in the long term and to make fine adjustments according to production changes.
We once served a cultural paper production enterprise located in East China. This enterprise encountered severe foam in its coating process, causing pinholes and uneven gloss in the coating. After our on-site diagnosis and laboratory matching, we recommended a coating defoamer with excellent high-shear stability. By precisely controlling the dosage in the pilot test stage, the foam was suppressed quickly and durably, the coating surface quality was significantly improved, the pinhole problem was basically eliminated, and at the same time no negative impact was produced on the coating viscosity and bonding strength; the customer was satisfied with the smoothness and printability of the final paper.
Choosing Chemi Tech means you gain not only a high-efficiency defoamer but also a complete support system from problem diagnosis and product selection to application optimization. We are committed to helping papermaking enterprises stabilize their processes, improve quality and reduce costs, and achieve smoother and more efficient production operations.