PA66, commonly known as nylon 66. It is a colorless transparent semi-crystalline thermoplastic polymer widely used in automobiles, electronic appliances, mechanical instrumentation, industrial parts and other industries. However, nylon has a large water absorption, poor acid resistance, low dry and low-temperature impact strength, and easy deformation after water absorption, which affects the dimensional stability of the product, and its application range is limited. Glass fiber filling greatly enhances the impact, thermal deformation, molding processability and chemical corrosion resistance of PA66. It has good dimensional accuracy, wear resistance, light weight, high toughness and easy processing.