Key Properties of PBT Material

PBT (polybutylene terephthalate) is a unique engineering polyester valued for the following key properties:

• Low moisture absorption
• Excellent dimensional stability
• Very good thermal and color stability
• Outstanding stiffness and hardness
• Good mechanical strength
• High wear resistance and low friction
• Good creep and fatigue behavior
• Excellent electrical properties (consistent across environmental conditions)
• Very good chemical resistance
• Outstanding flammability characteristics (inherently flame retardant grades available)
• Excellent flow and processing properties
• Very good surface finish
• Advantages of flame retardant (FR) and glass fiber reinforced (GF) PBT compared to PA (nylon):
• Better mechanical properties in some reinforced grades
• Lower material cost
• Higher melt flow for easier filling of complex molds
• Faster molding cycles due to faster crystallization
• Lower processing cost
• Consistent electrical properties (not affected by humidity)
• Superior dimensional stability (low moisture uptake)
• Excellent color stability even at high temperatures
• Outstanding flame resistivity
• Better gloss and surface appearance