FBT resin
Polybutylene terephthalate, abbreviated as PBT, belongs to the polyester series. It is formed by the polycondensation of 1.4-butanediol (1.4-Butylene glycol) with terephthalic acid (PTA) or dimethyl terephthalate (DMT), and is processed into a milky white, semi-transparent to opaque, crystalline thermoplastic polyester resin.
PBT has high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, and a low water absorption rate of only 0.1%. It maintains various physical properties (including electrical properties) in humid environments, has electrical insulation, but has high volume resistivity and dielectric loss.
PBT is resistant to hot water, alkalis, acids, and oils, but is easily eroded by halogenated hydrocarbons. It has poor hydrolysis resistance and can crystallize rapidly at low temperatures, with good moldability.
PBT crystallizes quickly, and the most suitable processing method is injection molding. Other methods include extrusion, blow molding, coating, and various secondary processing methods. It needs to be pre-dried before molding, with moisture content reduced to 0.02%.
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