In the production of polyvinyl alcohol (PVA), the foam problem often becomes an invisible bottleneck that restricts the improvement of efficiency and quality. From monomer polymerization to the later alcoholysis stage, the presence of high temperature, high shear and surface-active substances makes the system highly prone to generating a large amount of stubborn foam. Such foam not only occupies effective reaction space and reduces equipment utilization but may also cause material overflow and inaccurate metering, ultimately affecting the product's purity, transparency and the uniformity of its molecular weight distribution. Traditional defoaming methods often have defects such as a short foam-suppressing time, easy demulsification and oil floating, or effects on the product's own performance, causing great trouble to many producers.
In response to this common industry problem, the Chemi Tech technical team has deeply analyzed the process characteristics and foaming mechanisms of each stage of PVA production and successfully developed a series of high-performance silicone composite defoamers. The core of our solution lies in precise molecular structure design, ensuring that the defoamer has the multiple capabilities of rapid penetration, efficient spreading and lasting foam suppression. The product has good compatibility with the PVA system, remains stable under strongly acidic, strongly alkaline and high-temperature environments, and will not introduce impurities into or increase the haze of the final product.
The specific implementation steps are divided into four steps: The first step is working-condition diagnosis. Our engineers will learn in detail about your raw materials, process parameters and the specific foaming stage. The second step is sample matching. Based on the diagnosis results, we select or customize the most suitable defoamer model from our product library. The third step is on-site testing. We provide samples and conduct small-scale and pilot tests to verify the defoaming speed, durability and impact on product quality. The fourth step is scheme finalization. We determine the optimal addition point, dosage and operating procedures to ensure long-term stable supply and technical support.
We once helped a synthetic materials enterprise located in East China solve the problem of widespread foam in its PVA alcoholysis section. The defoamer the enterprise originally used quickly failed at high temperature, causing material loss and frequent shutdowns for cleaning. After adopting Chemi Tech's customized scheme, the defoamer showed outstanding durability on the high-temperature line, the foam was controlled immediately and for the long term, the operating stability of the production line was significantly improved, and the product's light transmittance indicator was also improved. The customer was satisfied with the final result.
Choosing Chemi Tech means choosing a deep understanding of the details of chemical production and reliable product performance. Through professional technical service and high-quality defoaming products, we are committed to helping you clear away production obstacles and achieve a smooth and efficient polyvinyl alcohol manufacturing process.