(1) Ultra high mechanical strength and heat resistance.

(2) Excellent electrical insulation;

(3) Good dimensional stability and low coefficient of thermal expansion;

Polybutylene terephthalate:

Polybutylece terephthalate， Abbreviated as PBT

(1) Excellent comprehensive mechanical performance;

(2) Good wear resistance, with friction factors typically ranging from 0.1 to 0.3;

(3) Good resistance to chemical solvents;

(1) Excellent mechanical performance, high rigidity, high hardness, and good dimensional stability

(2) Good chemical resistance;

(3) The hot deformation temperature and long-term use temperature are high.

Polyethylene terephthalate:

Polyethylene GlycolTerephthalate， Abbreviated as PET

(1) Strong metallic texture;

(2) High mechanical performance, high rigidity, high hardness, and good dimensional stability;

(3) Good chemical resistance;