1. Enhanced modification: glass fiber is added to PBT. The bonding strength between glass fiber and PBT resin is good. After adding a certain amount of glass fiber to PBT resin, it can not only maintain the original advantages of chemical resistance and processability of PBT resin. Moreover, it can greatly improve its mechanical properties and overcome the notch sensitivity of PBT resin.
2, flame retardant modification: PBT is a crystalline aromatic polyester, if no flame retardant is added, its flame retardancy is UL94HB grade, only after adding flame retardant, can reach UL94V0 grade. Commonly used flame retardants are halogen-based flame retardants such as bromide, Sb2O3, phosphide and chloride.
3. Blending alloy modification: The main purpose of blending PBT with other polymers is to improve the notched impact strength, improve the warpage deformation caused by the shrinkage of the forming process, and improve the heat resistance. Blending is commonly used at home and abroad to modify it. The blend-modified polymers used for PBT mainly include PC, PET, and the like. These products are mainly used in automobiles, electronics, and power tools. The proportion of glass fiber is different, and its application fields are also different.
