Polybutylene terephthalate (PBT) is a polyester made by polycondensation of terephthalic acid and 1,4-butanediol. It is an important thermoplastic polyester and one of the five major engineering plastics. The product is a milky white, translucent to opaque, semi-crystalline thermoplastic polyester with high heat resistance. It is not resistant to strong acids and alkalis, but is resistant to organic solvents, flammable, and decomposes at high temperatures.

Polybutylene terephthalate is widely used in automobiles, mechanical equipment, precision instrument parts, electronic appliances, textiles and other fields.

Product usage

Most of the PBT resin is processed into compounding materials for use. After being modified with various additives, it can be blended with other resins to obtain good comprehensive properties such as heat resistance, flame retardancy, and electrical insulation, as well as good processing properties. It is widely used in industries such as electrical appliances, automobiles, aircraft manufacturing, communications, home appliances, and transportation. For example, after being modified with glass fiber, PBT can be used to manufacture electronic components that require high dimensional stability under long-term working conditions at high temperatures. PBT has a high breakdown voltage and is suitable for making high-voltage resistant parts. Due to its good fluidity in the molten state, it is suitable for injection processing of electrical parts with complex structures, such as integrated circuit sockets, printed circuit boards, computer keyboards, electrical switches, fuses, temperature control switches, protectors, etc. Automobile bumpers, carburetors, spark plugs, fuel supply system parts, igniters, etc. In the field of communications, PBT is widely used in integrated modules, wiring boards, power tools, etc. for program-controlled telephones.