Paper defoamers for papermaking process foaming characteristics of the paper industry and design, using the product in order to effectively control the pulp and papermaking foam overflowing and improve quality. Pan used in papermaking papermaking system foaming, can be used for papermaking wastewater treatment, antifreeze, anti-foaming distillation system. The foam produced during papermaking harm's: First, the foam floating on the liquid surface; the second is the air dissolved in the slurry; third is adsorbed on the fiber surface and the inside of the fiber fine foam. Second look foam hazards. High content of the slurry bubble affects not only the wire section dehydration, causing paper diseases, reduce machine speed, causing breaks, and easy to make operational efficiency of the pump fell, increasing energy consumption, making the entire flow system is unstable, and even cause the pump The trip down. According to the research, the general diameter of less than 0.8mm bubbles often makes the wet paper web portions formed bubbles and poor uniformity of finished paper, prevent the binding between the fibers, cardboard easily layered, full frame when severe delamination. General research and production experience has shown that it will have a greater impact on the quality of the paper pulp-containing gas at more than 0.5% to 0.6%. Features defoam: This product can quickly eliminate paper industry wheat straw, rice straw, pine, paper, reeds, bamboo and other surfactants and foam generated in the pulp, pulp wash effect is obvious, suppression foam durable, non-toxic and odorless, non-post-contamination. Can effectively control the pulp overflow, improve the quality of papermaking