Polybutylenterephthalat (PBT) and PBT blends - product characteristics |
PBT
PBT+ASA
PBT+PC
PBT+PET
PET (reinforced solely)
PET+PBT
PET+PC
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Natural color
Light ivory, opaque
Colors
In addition to uncolored and black material, a series of opaque standard colors is available. Special colors are also possible.
Surface finish
High-gloss or textured, depending on mold surface
Stiffness
High, 1,700 MPa unreinforced, particularly reinforced grades, tensile modulus up to 18,500 MPa
Impact and break resistance
High but notch-sensitive
elastomer-modified grades have good low-temperature impact strength
Resistance to dynamic loading
High
Stress crack resistance
Good
Heat resistance
High; depending on grade
Short-term peaks from 160 to 210 °C (GF grades to 240 °C), permanent service temperature: 90 to 140 °C
Dimensional accuracy and stability
Good but not quite on the same level as amorphous thermoplastics
Abrasion resistance
Good
Chemical resistance
Good; particularly resistant to fuels, lubricants, solvents and cleaning fluids
Electrical insulation Good
Good, dielectric strength: 20 to 35 kV/mm
Volume resistivity:
Standard: 1013 to 1016 Ohm·cm
Spez. grades with improved electric conductivity: 104 to 105 Ohm·cm
Comparative tracking index CTI: rating 175 to 600
Processability
Easy flow, rapid solidification, fast cycles
Other properties
Low moisture absorption, low surface friction
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