PPA
PPA (polyphthalamides) are among the high-performance polyamides and are particularly impressive due to their very high stiffness and strength, even at elevated temperatures and after water absorption. They are particularly suitable as metal substitutes.
Trade name: Grivory
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Only show products for which all selected properties have been measured
Physical properties
Density in kg/m³
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Moisture absorption 23°C/50% r.h. in %.
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Water absorption in %
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Mechanical properties
Compression set at 23°C in %.
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Compression set at 70°C in %.
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E-modulus in MPa
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Notched impact strength (Charpy) at -30°C in kJ/m²
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Notched impact strength (Charpy) at 23°C in kJ/m²
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Impact strength (Charpy) at -30°C in kJ/m²
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Impact strength (Charpy) at 23°C in kJ/m²
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Shore A hardness
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Shore D hardness
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Stress at 10% elongation in MPa
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Stress at 100% elongation in MPa
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Stress at 300% elongation in MPa
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Elongation at break in %
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Stress at 50% elongation in MPa
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Breaking stress in MPa
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Elongation at yield in %
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Compressive strength in MPa
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Yield stress in MPa
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Compression set at 100°C in %
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Tear resistance in kN/m
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Rheological properties
Melt flow rate MFR in g/10min
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Melt flow rate MFR (test condition)
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Shrinkage in flow direction in %
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Shrinkage transverse to the flow direction in %
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Thermal properties
Maximum service temperature (short-term) in °C
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Melting temperature (DSC, 10°C/min) in °C
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UL listing
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Vicat softening temperature (50°C/h 50N) in °C
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Coefficient of thermal expansion in flow direction in E-6/K
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Coefficient of thermal expansion transverse to the flow direction in E-6/K
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Heat deflection temperature HDT (0.45 MPa) in °C
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Heat deflection temperature HDT (1.80 MPa) in °C
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Thermal conductivity in plane in W/mK
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Thermal conductivity through plane in W/mK
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Fire behavior (0.4 mm wall thickness)
Fire behavior (0.8 mm wall thickness)
Fire behavior (1.6 mm wall thickness)
Fire behavior (3.2 mm wall thickness)
Continuous operating temperature in °C
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Glass transition temperature in °C
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Electrical properties
Contact resistance in Ohm*m
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Dielectric strength in kV/mm
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Tracking resistance CTI in V
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Surface resistivity in ohms
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Magnetic properties
Coercivity (jHc) in kA/m
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max. energy product (BH max) in kJ/m³
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Remanence (Br) in mT
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