PBT monofilament has excellent properties such as strength, toughness, fatigue resistance and high impact strength. And has good heat resistance, weather resistance, electrical performance and arc resistance. In addition, due to the low moisture absorption rate, it is suitable for wet working environment, and it is used to process toothbrushes, paint brushes and cosmetic brushes, etc., with good tensile properties and toughness, and is also suitable for making strings.