Polybutylene Terephthalate (PBT) is a semi-crystalline polymer combining
excellent mechanical and electrical properties with robust chemical resistance.
Polybutylene Terephthalate is a semi-crystalline engineering-grade
thermoplastic, which is part of the polyester family of resins. It provides innovative
solutions that save weight and decrease costs and offers fast crystallization.
PBT offers good electrical properties and good mechanical properties
including high strength, rigidity, and toughness and chemical resistance to a wide
range of chemicals, solvents, oils and greases.
Polybutylene Terephthalate has excellent dimensional stability, low moisture absorption,
and powerful insulation resistance. Unfilled PBT grades have a wide range of melt
viscosities to provide processing latitude in injection molding and in extrusion
techniques ranging from melt-blowing of PBT fibers to production of PBT rod and
slab, fiber optic buffer tubes or brake cable liners. Reinforced PBT grades applications
include automotive ignition and electrical system parts; electrical and electronic
connectors and sockets; switches, bobbins and motor housings and insulation; appliance
housings, handles and bases. Flame-retardant PBT and lubricated
PBT versions are also available in both unreinforced and reinforced
grades. The broad use of PBT is also shown by the numerous regulatory approvals
held by various grades. These include VDE or UL-approvals for the E/E market or
FDA approval for the nutrition and medical market.
The PBT- based resins deliver high flow and rapid crystallization. This makes them
fast-cycling. The PBT product range includes a wide variety of reinforced, filled,
impact-modified and flame-retardant grades which are great for injection molding.