White, black and colored Polybutylene terephthalate (PBT) masterbatches
PBT BLACK & COLOUR MASTERBATCH FOR POY & FDY FILAMENT YARN
Polybutylene terephthalate (PBT) is a thermoplastic engineering polymer that is used as an insulator in the electrical and electronics industries. It is a thermoplastic (semi-)crystalline polymer, and a type of polyester. PBT is resistant to solvents, shrinks very little during forming, is mechanically strong, heat-resistant up to 150 °C (or 200 °C with glass-fibre reinforcement) and can be treated with flame retardants to make it noncombustible.
PBT is closely related to other thermoplastic polyesters.
Polybutylene terephthalate is used for housings in electrical engineering, but also in automotive construction as plug connectors and in households for example in showerheads or irons. It is also found processed into fibers in toothbrushes, false eyelashes and is used in the keycaps of some high end computer keyboards because the texture is highly resistant to wear and discoloration due to UV radiation.
PBT can also be made into yarn.Due to its chlorine resistance it is commonly found in swimwear. Further, recent studies have shown that PBT has superior UV properties to PET based fabrics.
PBT, especially glass fibre grades can be effectively fire retarded with halogen free products. Phosphorus-based flame retardant systems are used in these Fire-safe polymers and are based on aluminium diethyl phosphinate and synergists.