Thermoplastic Polyesters Based on Polyethylene Terephthalates (PBT)
Polybutylene terephthalate (PBT) has a semi-crystalline structure and therefore high strength, stiffness and toughness, low creep tendency and good dimensional accuracy. PBT belongs to the group of polyesters and shares some characteristics with the common PET (polyethylene terephthalate), but it is better suited for injection moulding and technical applications.
A characteristic property of this thermoplastic material is its resistance to a variety of chemicals, solvents, oils, fats and acids. Low moisture absorption and high insulation resistance also make PBT a popular material.
PBT – distribution on the market
The numerous PBT compounds available on the market speak for the versatility of this material and its possible applications. Properties such as workability, dimensional stability, heat resistance, electrical properties and high surface quality have also contributed to market growth. Polybutylene terephthalate, for example, meets the high demands placed on components in the automotive sector, for example in the engine compartment. It is one of the standard materials for housings, plugs and connectors in the electronic/electrical market. Due to its good slide/friction properties, it is often used as a sliding partner for polyoxymethylene (POM).
Improved Properties Through Reinforcement
The wide range of PBT product performance available in the marketplace is a tribute to the versatility of this material. Excellent mouldability and moulding characteristics, dimensional stability, environmental and temperature resistance, electrical properties, colorability and surface finish are all key characteristics that have contributed to the growth of PBT.
Filled and reinforced PBT grades will fill complex and/or thin-walled parts in relatively short cycles. It features excellent dimensional stability, low moisture absorption and powerful insulation resistance. Depending on market requirements, the PBT flame-retardant system is low in migration and halogen-free. Various grades of PBT hold regulatory approvals including VDE or UL approvals for the electrical and electronic market, and FDA approval for the nutrition and medical markets.
These PBT Grades Are Available From K.D. Feddersen
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