Why should engineering plastics be dehumidified and dried?
2018-08-21
Dehumidifying dryer is a kind of equipment mainly used for dehumidifying engineering plastics with strong hygroscopicity. It is an essential auxiliary machine in engineering plastic processing.
Since most engineering plastics, such as PC, PA, PBT, PPS, LCP, etc., are hygroscopic, if dehumidification is not performed during molding, bubbles, silver filaments, cracks, poor stability, etc. are easily generated. product quality. Ordinary hot air drying equipment directly uses air with moisture to dry the material. Although the gas is heated, the moisture in the air still exists (moisture), and the drying effect is greatly reduced. If the air temperature is simply increased, There will be problems such as agglomeration of the material, scorching, etc., which seriously affect the material properties.
Since most engineering plastics, such as PC, PA, PBT, PPS, LCP, etc., are hygroscopic, if dehumidification is not performed during molding, bubbles, silver filaments, cracks, poor stability, etc. are easily generated. product quality. Ordinary hot air drying equipment directly uses air with moisture to dry the material. Although the gas is heated, the moisture in the air still exists (moisture), and the drying effect is greatly reduced. If the air temperature is simply increased, There will be problems such as agglomeration of the material, scorching, etc., which seriously affect the material properties.
