Working principle of dryer
In the plastics processing industry, products exhibit shrinkage, silver streaks, bubbles, cracks, flow marks, poor transparency, etc. The main reason for these poor qualities is that the plastics are not sufficiently dried before being molded. Engineering plastics such as : PA, PET, PC, PBT, CA and other highly hygroscopic materials, because the moisture penetrates into the plastic particles, the traditional hot air dryer can not make it completely dry. It has been proved by practice to reduce the dew point of the drying wind to below -40 ° C while controlling the heat to blow it over the surface of the wet plastic granules, so that the moisture content of it before molding can be reduced to below 0.02%, and the three-in-one dehumidification dryer is sealed In the circulation system, the air is fully dehumidified and heated, and the dry air quickly precipitates the water in the plastic particles to achieve the effect of dehumidification and drying.