Characteristics and Application of White Water Defoamer for Paper Making

　　Paper making white water defoamer is composed of special hydroxyl compounds, a few synergists, emulsifiers, dispersants, and other surfactants. It has good defoaming and foam inhibiting effects on white water, which can quickly remove the fine bubbles entrained between fibers, eliminate the foam floating on the pulp surface, avoid the formation of holes, reduce paper breaks, prevent the overflow of the pulp storage tank, ensure the loss of fiber and wet end chemicals, and improve the paper evenness and quality greatly.

　　White water defoamers for paper making belong to the category of completely silicon-free defoamers, which are specialized defoamers for paper making; Its chemical action is to eliminate the foam of white water, which generates a large number of foam due to the recycling of white water. After the initial addition, the use of defoamers will gradually decrease due to the strong anti foaming performance of this product. This product can not only quickly eliminate the foam on the water surface, but also quickly remove the micro bubbles adsorbed on the fiber in the water.

　　Characteristics of white water defoamer for papermaking:

　　1. Fast defoaming, long-lasting foam suppression, low dosage, and does not affect the basic properties of the foaming system.

　　2. Good heat resistance, stable chemical properties, strong versatility, non flammable, and non explosive.

　　3. It is easily dispersed in water, has the ability to prevent bacterial growth, and has stable effects during storage.

　　Paper making white water defoamers are widely used:

　　1. Remove the surface foam containing papermaking white water and the bubbles adsorbed on the fiber in the water.

　　2. Remove the surface foam of the white water system containing modified starch and the bubbles adsorbed on the fiber in the water.

　　3. Remove foam in water containing polyacrylamide retention aid system.

　　4. Remove the surface foam of the white water system containing AKD lotion and the bubbles adsorbed on the fiber in the water.

　　5. Other occasions where silicone defoamers cannot be used for defoaming.