Moisture is a very important indicator for polyester spinning. Polyester fiber manufacturers should carefully and re-measure the moisture content of polyester masterbatch before spinning. It is necessary to know that the manufacturers of masterbatch have just made good masterbatch. At the time, the product does not contain moisture inside because the masterbatch production temperature is greater than 100 °C. However, after storage for a period of time, the polyester masterbatch is easy to absorb water and needs to be dried before use.

Due to the presence of moisture, it is assumed that the water will not be evaporated, which will cause decomposition of PET, thus affecting product quality. Although many masterbatch manufacturers at home and abroad have already vacuum-seamed polyester masterbatch, it does not need to be dried any more. However, once it is stored for a period of time, it must be dried when it is used. Some polyester filament enterprises are too troublesome, and neglecting this small link, the result will be a quality problem that should not be produced. It should be noted.