Application of polyether foam agent in paper industry-Iota

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News > Dynamic industry > Application of polyether foam agent in paper industry

Application of polyether foam agent in paper industry

The main active component of polyether foam agent is ethylene oxide and propylene oxide block copolymer, the molecular weight is more than 3000. In 1954, the first of this kind of anti foaming agent was put into operation by the American Wagndott company. Especially in the 60's of 20th century, western countries basically completed the transformation of ethylene oxide and propylene oxide as raw material for the synthesis route, for the preparation of ethylene oxide and propylene oxide provides a lot of cheap raw materials, greatly promoted the development of polyether industry. The production of polyether foam agent in China began in 1969 and was the first in the application of antibiotic fermentation industry. In the middle of 80, polyether defoaming agent in papermaking industry began to put into use, which makes the production of coated paper manufacturers benefit. Cancel such bubble agent performance characteristics: non-toxic, easy to use, dispersion property and good thermal stability and chemical stability, not only has excellent fire foam performance, but also has stable foam capacity [7]. Polyether defoaming agent according to the specific circumstances of the application system can be made into oil-based or water-based products and polyether can also be and fatty acid amide and silicone compound into defoaming powerful composite defoaming agent.
Polyether defoaming agents and their application in paper industry in paper coating process in the preparation of, due to pigment, alkali foaming material existence, mechanical agitation to within the microenvironment of the system into the air, increasing the micro environment of the phase interface, formed by a combination of liquid and solid particles and gas three-phase foam, resulting in the paper surface produced white [2]. In order to eliminate the white spot and make paper uniform and smooth white paper, firm coating uniformity and printing, pattern clear and delicate, in coated paper production process must join an appropriate amount of defoaming agent. The coating paper is different from that of the pulping and foaming agent. The latter is separated from the pulp, while the former is kept in the paper. Coated paper in technical requirements: any papermaking additives adding to the were on the coating adhesion, dispersion and printing adaptability without any side effects, and high quality varieties of additives can also improve the paper gloss, picking velocity and lubrication performance. In fact, coated paper is often the same time with the bubble elimination, bubble, polishing, lubrication and other functions. There are many varieties of the coating paper, and different coating formulations must be compatible with different anti foaming agents. For example, as a common coated paper, coated paper production required defoaming agent goods model is NOPCO, Sn and FBX and a variety of brands. However, at present, the main active components of coated paper were generally divided into polyether, which is very suitable for coating preparation. It is well known that polyether defoaming agent of the very wide range of applications. It is not only paper industry indispensable auxiliary species, and has an important application in daily chemical, textile, oil, food, rubber, etc. in many industries.

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