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
Electrical properties
Contact resistance in Ohm*m
min
max
Dielectric strength in kV/mm
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max
Tracking resistance CTI in V
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max
Surface resistivity in ohms
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max
Magnetic properties
Coercivity (jHc) in kA/m
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max
max. energy product (BH max) in kJ/m³
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max
Remanence (Br) in mT
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Mechanical properties
Shore D hardness
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max
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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Compression set at 23°C in %.
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Compression set at 70°C in %.
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max
E-modulus in MPa
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max
Notched impact strength (Charpy) at -30°C in kJ/m²
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max
Notched impact strength (Charpy) at 23°C in kJ/m²
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max
Impact strength (Charpy) at -30°C in kJ/m²
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max
Impact strength (Charpy) at 23°C in kJ/m²
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Shore A hardness
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max
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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Rheological properties
Shrinkage transverse to the flow direction in %
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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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Thermal properties
Thermal conductivity in plane in W/mK
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max
Thermal conductivity through plane in W/mK
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max
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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max
Glass transition temperature in °C
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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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max
Coefficient of thermal expansion in flow direction in E-6/K
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max
Coefficient of thermal expansion transverse to the flow direction in E-6/K
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max
Heat deflection temperature HDT (0.45 MPa) in °C
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max
Heat deflection temperature HDT (1.80 MPa) in °C
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max
