PBT and PC + PBT material difference
I. Material Properties
PBT is a semi-crystalline thermoplastic with excellent flexibility, drop resistance and brittle resistance.
It is non-flammable, self-extinguishing and has relatively high electrical properties among thermoplastics.
PBT has very low water absorption and can be used in high temperature water for a long time without deformation.
Its surface is very smooth with a low coefficient of friction, making it suitable for applications with high frictional wear.
PBT has strong stability after molding, high dimensional accuracy, and can maintain its original state when exposed to chemicals for a long period of time (except for strong acids and alkalis).
PBT has good fluidity and excellent working performance after molding and processing.
PC/PBT
PC/PBT is a blend of PC (polycarbonate) and PBT, which is supplied in the shape of pellets after blending and molding.
PC/PBT combines the advantages of PC and PBT with high surface hardness, rigidity and toughness.
It has high resistance to high temperature deformation and stress cracking, and its mechanical properties are between PC and PBT.
PC/PBT has good heat resistance and maintains strength and stability at high temperatures, usually withstanding temperatures up to 150C or more.
The material also has good impact resistance, chemical resistance and electrical insulation.
PC/PBT has good dimensional stability and is not susceptible to dimensional changes, making it suitable for applications requiring precise dimensions.
II. Application Areas
PBT
PBT is widely used in electrical and electronic fields, such as connectors and coil winding spools.
It is used in the automotive industry to manufacture various parts, such as bumper, distributor plate cover.
PBT is also used in the manufacture of industrial parts, such as OA fans, keyboards, and so on.
Due to its excellent friction resistance, PBT is also suitable for making parts that require abrasion resistance, such as keycaps.
PC/PBT
PC/PBT has a wide range of applications in automotive parts, such as door handles and fenders.
It is used in electronic and electrical equipment to make parts that require high-temperature and impact resistance.
PC/PBT is also used in medical equipment and other applications requiring high precision and stable performance.
Third, performance comparison
Heat resistance: PC/PBT has better heat resistance than PBT and can maintain stable performance at higher temperatures.
Impact resistance: PC / PBT impact resistance is better for applications that need to withstand impact loads.
Electrical Properties: The electrical properties of PBT are relatively high among thermoplastics, while PC/PBT also has good electrical insulation.
Dimensional stability: Both have good dimensional stability, but PC/PBT remains dimensionally unchanged at higher temperatures.