30% Carbon Fiber (30 CF) PET
30 CF PET is a grade of PET. It has the lowest ductility compared to the other variants of PET. The graph bars on the material properties cards below compare 30 CF PET to: polyester plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elongation at Break
2.5 %
Flexural Modulus
14 GPa 2.0 x 106 psi
Impact Strength: Notched Izod
60 J/m 1.1 ft-lb/in
Tensile Strength: Ultimate (UTS)
140 MPa 20 x 103 psi
Thermal Properties
Glass Transition Temperature
70 °C 160 °F
Maximum Temperature: Autoignition
410 °C 760 °F
Maximum Temperature: Decomposition
390 °C 730 °F
Maximum Temperature: Mechanical
80 °C 180 °F
Melting Onset (Solidus)
260 °C 490 °F
Specific Heat Capacity
1000 J/kg-K 0.24 BTU/lb-°F
Other Material Properties
Density
1.4 g/cm3 89 lb/ft3
Dielectric Constant (Relative Permittivity) At 1 Hz
3.7
Limiting Oxygen Index (LOI)
21 %
Water Absorption At Saturation
0.3 %
Common Calculations
Stiffness to Weight: Axial
1.2 to 4.4 points
Stiffness to Weight: Bending
32 to 54 points
Strength to Weight: Axial
27 points
Strength to Weight: Bending
41 points
Followup Questions
Further Reading
Reinforced Plastics Durability, Geoffrey Pritchard (editor), 1999
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999