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Melamine molding powder is an important raw material for the production of melamine tableware. This article will introduce the production steps and principles of melamine powder.
1) Reaction: The reaction equipment generally adopts stainless steel reaction kettle with a volume between 2000-6000L, and the reaction time is generally controlled between 90-120 minutes.
The function of the reaction is to polymerize formaldehyde, melamine and some additives into resin.
2) Kneading: The resin obtained from the reaction is generally mixed with pulp in a kneader, and the product obtained after kneading is a coating of resin and pulp. The mixing time in the kneader is generally between 60-80min.
3) Drying: The drying process is mainly used to remove moisture from the product. Generally, a large belt dryer is used for dehydration, and irregular particles are obtained after dehydration. The drying time is generally 2.5h-3h, and the output of the dryer is generally set at 1T/h. .
4) Ball milling: through the shearing and impact force between the ceramic balls in the ball mill, the particles are ground finely. The ball milling time is generally more than 10 hours. In areas where the temperature is relatively hot, it is necessary to equip a special refrigerator to produce cooling water to supply to the ball mill.
5) Screening and packaging: Even after a long period of grinding, there are still some coarse materials or impurities in the material, which can be filtered through a vibrating screen to make the fineness of the product reach a uniform standard.
The packaging bag is the outer paper bag with the inner plastic film, which can prevent moisture and dust.
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