Four major causes and solutions of PVC paste resin foaming

PVC paste resin, also known as paste PVC resin in Chinese, is widely used in industries such as artificial leather, soft trademarks, wallpaper, industrial coatings, and foam plastics due to its ability to form first and then thermoplastic, without the need for complex equipment for processing, convenient configuration, good stability, and easy operation. It has good paste forming performance and good dispersion performance, and has excellent mechanical strength and easy coloring. However, the foam problem generated during the production of this PVC paste resin is really a headache for the manufacturer. In fact, there is a very simple foam treatment method - using PVC paste resin defoamer. The following are some issues that may arise during the production process.

When configuring dispersants

When preparing dispersant, there is a stirring operation, which leads to a lot of foam in the solution, which will not only lead to overflow and dispersant loss, but also affect the observation of liquid level.

2. Dispersant during polymerization reaction

When the dispersant is polymerizing, its own surface tension will also produce foam ("wet bubble") with stirring, and the existence of "wet bubble" will lead to VCM gas-phase polymerization, which is generally the reason for kettle sticking.

3. Discharge process of slurry

Generally, the slurry after reaction has to be discharged to the feed tank, while the unreacted gas has to be discharged. In this process, the discharge tank will be accompanied by a lot of foam, and the foam followed by unreacted gas will lead to material waste, pipe blockage and other problems.

These headache problems that are difficult to handle will be solved one by one after using PVC paste resin defoamer. The defoamer for PVC paste resin developed and produced by Chinese federal manufacturers has the characteristics of good chemical stability, good thermal stability, stable unbalanced surface tension in foam, good defoaming and antifoaming performance, and does not affect the product quality and post-processing performance of the resin. It is widely used in the production of PVC resin, synthetic rubber degassing, vinegar acrylic emulsion liquid, wet PU synthetic leather resin, elastic lotion, In situations such as defoaming with light cured resin.