Revealing the role of PVA slurry defoamer
PVA slurry usually refers to a slurry formed by mixing polyvinyl alcohol particles with water or other solvents. It is used in the production of coatings, adhesives, pulp, textiles and building materials. It usually has excellent adhesion and composition. Film properties can improve the strength and durability of the product. The anti-foaming property is one of its important characteristics. The addition of PVA slurry defoamer can better inhibit the formation of foam.
Why add PVA slurry defoamer?
1. Inhibit the formation of bubbles and foam: During the production and use of PVA slurry, a large number of bubbles and foam are easily generated due to stirring, mixing, spraying and other process operations. These bubbles and foam will affect the fluidity and wettability of the coating, reduce the quality and appearance of the coating film, and even cause defects on the film surface. Adding defoaming agents can effectively inhibit the formation of bubbles and foam and maintain the stability and coating effect of PVA slurry.
2. Improve the surface quality of the coating: During the construction and painting process of PVA slurry, the presence of bubbles and foam can easily cause the surface of the coating film to be uneven and have defects. The addition of defoaming agent can destroy the surface tension of bubbles and foam, promote the elimination of bubbles and the exhaust of paint, thereby improving the surface quality of the paint and making the coating film smoother and more uniform.
3. Improve process stability: During the production process of PVA slurry, if the generation of bubbles and foam cannot be effectively controlled, it will easily lead to unstable production processes, increase production costs and reduce production efficiency. By adding defoaming agents, the process stability of PVA slurry can be improved, problems and losses during the production process can be reduced, and product quality and production efficiency can be ensured.
PVA slurry defoaming agent has good dispersibility and can be quickly and evenly dispersed in PVA slurry. This can ensure that the contact area of each bubble of the defoaming agent is maximized and the defoaming effect is improved. At the same time, good dispersion can also reduce the agglomeration of PVA slurry particles and ensure the stable performance of PVA slurry.
