Why does the paper industry use defoaming agent?
Defoaming agents are widely used in the paper industry because they can eliminate paper manufacturers' concerns about whether the paper is green. When air entering the slurry is surrounded by the surrounding slurry, bubbles form, and due to the attraction between the bubbles and the outward hydrophobic groups, the bubbles gather together and eventually form a foam. If the foam is not eliminated, it will affect the normal operation of the paper system and to a certain extent lead to quality problems of the paper products manufactured. At this time, paper antifoaming agent can eliminate foam or inhibit the production of foam.
Why paper defoaming agent is indispensable?
The amount of antifoaming agent in paper industry is not large, but its effect can not be ignored. The amount of antifoaming agent in paper industry is not large, but its effect can not be ignored. In the whole process of paper industry, steam and a series of practical operations after feeding, such as cleaning, brushing, bleaching, extraction, pulp supply system software, surface layer glue, sizing, black liquid purchase, etc., will produce foam, which will interfere with all normal production and manufacturing, which will degrade the quality of paper types. The key methods for removing foam are chemical, physical and mechanical methods. Organic chemical demulsification method refers to adding compound (defoamer) to remove foam during processing. The physical demulsification method is to remove foam by soaking, heating or reducing pressure. The demulsification method of mechanical equipment refers to the use of mechanical equipment to break foam. The physical and mechanical methods of chemical fiber defoamer manufacturers are easy to use, but general attacks can only treat symptoms and cannot solve the root cause. The actual effect is not ideal. The most common application at this stage is the organic chemical demulsification method, that is, the defoamer is used to control the generation of foam in the whole paper industry and eliminate the foam that has been generated.
Application method of paper defoamer:
According to the bubbling phenomenon in different links, select good compatibility to add to each bubbling link. You can select a method based on the actual situation. For example, the original solution is directly added, diluted, and then sprayed. In the paper industry, paper defoaming agents are usually added during bleaching and washing when foaming problems occur during pulping. In addition, a paper defoamer is added during the operation of the stain remover and thickener. Foaming agents can also be achieved. If foam problems occur during the paper stage, paper defoaming agents can be added to the pulp box, slurry pool, coating and sizing pressure treatment of the paper machine.