Technoter (PBT)

Filled and modified compositions on the basis of polybutylene terephthalate are produced by the R&P POLYPLASTIC under the TECHNOTER trademark.

Application of polybutylene terephthalate (PBT) and compositions on its basis has actively expanded over the last 10 years. This growth was triggered by their successful use in electrical equipment and electronics. Materials of the TECHNOTER line employ valuable qualities of the matrix (high mechanical durability, heat resistance, excellent dielectric properties, including at elevated temperatures and humidity, spark stability, the highest dimensional stability among thermoplastics, including in humid environments) which, when combined with various fillers and modifiers, yield a wide range of compounds.

List of materials

Basic properties

High mechanical durability, heat resistance, excellent dielectric properties, including at elevated temperatures and humidity, spark stability, the highest dimensional stability among thermoplastics, including in humid environments.

Application

It is primarily used in electrical equipment and electronics where there is often a danger of the formation of cracks upon the pressing of metal fittings, in spark-dangerous areas as well as in the production of parts for household appliances exposed to heating, fine parts. Parts made of PBT may be used in the engine area of a car for a long time.

Modifications

Modification of PBT through the introduction of fiber glass, mineral fillers and other modifying additives makes it possible to significantly modify the properties of the basic material and give the compositions made on its basis:

  • even higher heat resistance;
  • significantly increased rigidity and durability;
  • make the basic material low-combustible, etc.

Temperature for the long-term use of PBT without the change of mechanical and dielectric properties is 120°C, for glass-filled PBT — up to 155°C, for short-term use — up to 210°C.

Processing

TECHNOTER may be processed by pressure molding on standard molding equipment. The material quickly crystallizes, therefore the cycle time may be very short. Before reworking, it needs drying at a temperature of 110-120°C for 4-6 hours to a target moisture of 0.02%. The layer thickness should not exceed 40 mm. Melt temperature is 240-260°C. The temperature of the form-lining of the hollow mold is 80-90°C.