New PBT 3D Printing Filament
Polybutylene terephthalate (PBT) is a synthetic semi-crystalline engineered thermoplastic with similar properties and composition to polyethylene terephthalate (PET). It is part of the polyester group of resins and share similar characteristics to other thermoplastic polyesters. Additionally, it is a high performance material with high molecular weight and is often characterized as being a strong, stiff, and engineerable plastic.
Use of PBT
PBT is present in everyday life and is common in electrical, electronic and automotive components. PBT resin and PBT compound are the two types of products that are used across various applications. PBT compound is comprised of various materials that can include PBT resin, fiber glass filing and additives, whereas the PBT resin only includes the base resin.
For use outdoors and in applications where fire is a concern, additives are included to improve its UV and flammability properties. With these modifications it is possible to have a PBT product that can be used in numerous industrial applications.
PBT resin is used to make PBT fiber as well as electronic parts, electrical parts and auto parts. TV set accessories, motor cover sand motor brushes are some examples of the use of PBT compound. When reinforced, it can be used in switches, sockets, bobbins and handles. The unfilled version of PBT is present in some brake cable liners and rods.
When a material with high strength, good dimensional stability, resistance to various chemicals and good insulations is needed, PBT is a preferred choice given its excellent characteristics.
The same is true when bearing and wear properties are determining factors in material selection. For these reasons, valves, food processing machinery components, wheels, and gears are also made from PBT. Its application in food processing components is largely due to its low moisture absorption and its resistance to staining.
It also does not absorb flavors.
Advantages of PBT
Some of the major advantages of PBT are evident in its resistance to solvents and low shrinkage rate when forming. The material also has good electrical resistance and due to its fast crystallization is easy to mold. It also has excellent heat resistance for up to 150°C and melting point reaching 225°C. The addition of fibers enhances its mechanical and thermal properties allowing it to withstand higher temperatures. Other notable advantages include:
Excellent stain resistant
Excellent machining characteristics
High strength
Toughness
Excellent stiffness-to-weight ratio
Resistance to environmental changes
Excellent machining characteristics
Better impact resistance compared to PET
Excellent dimensional stability
Blocks UV radiation
High electrical insulation properties
Good variety of grades available on the market