There are various types of defoamers for papermaking, mainly including polyether, oil, organosilicon, kerosene, and fatty alcohols. These types of defoamers have their own characteristics in solving the foam problem in the papermaking process and are suitable for different application scenarios.

Polyether defoamers are widely used in the paper industry. However, it is easily affected by the temperature of the foaming system during use, and the temperature difference will directly affect its defoaming effect. Oil based defoamers usually have good defoaming performance, but may have a certain impact on product color. Organic silicone defoamers are gradually gaining popularity in the paper industry due to their high efficiency, non toxicity, and environmental friendliness. Kerosene based defoamers have the advantages of low cost and easy use, but their application is limited in today's increasingly strict environmental requirements. Fatty alcohol defoamers have gradually become the mainstream choice in high-end paper production due to their high efficiency and low impact.

Therefore, when choosing defoamers in the paper industry, it is necessary to select the appropriate type of defoamer based on the actual situation and needs in the production process to ensure production efficiency and product quality.