Duratron™ DU7040G PI Polyimide is a bearing-grade PI that exhibits superior temperature and wear resistance qualities, while offering a low coefficient of friction. Not only does hot compression-molded Duratron™ DU7040G PI maintain its performance abilities with or without lubrication, but with 40% graphite added to provide long wear and low friction, it is a great choice for bearing, bushing and seal applications where higher loads or speeds are a significant factor. In comparison to Duratron™ D7040G, this ultra-grade PI has improved thermal-oxidative stability and better dimensional stability.
PROPERTIES
Superior temperature and wear resistance
Low coefficient of friction
No lubrication needed
Suitable for high loads and speeds
Improved dimensional and thermal-oxidative stability
Thermal Properties
Property
Value
Heat Deflection Temperature at 1.8MPa (264 psi) (ºC)
315
Continuous allowable service temperature in air
260
Mechanical Properties
Property
Value
Tensile Strength (MPa)
65
Tensile Modulus of Elasticity (MPa)
7,100
Compressive stress at 1% nominal strain (MPa)
50
Compressive stress at 2% nominal strain (MPa)
80
Compressive stress at 5% nominal strain (MPa)
120
Flexural Strength (MPa)
95
Charpy Impact Notched (kJ/m²)
1.5
Chemical Properties
Property
Value
Hot Water / Steam
Limited
Acids, Weak
Acceptable
Acids, Strong (pH 1-3)
Acceptable
Alkalies, Weak
Acceptable
Alkalies, Strong (pH 11-14)
Acceptable
Hydrocarbons - Aromatic
Not acceptable
Hydrocarbons - Aliphatic
Not acceptable
Ketones, Esters
Not acceptable
Chlorinated Solvents
Not acceptable
Alcohols
Acceptable
Inorganic Salt Solutions
Acceptable
Electrical Properties
Property
Value
Dielectric Strength (kV/mm)
Certification Properties
Property
Value
FDA
Not compliant
European Food Approval
Not compliant
NSF
Not compliant
3A-SSI
Not compliant
Canada AG
USDA
Not compliant
Flammability (UL Rating)
V-0
Medical use
SEMICON - Conductive materials
Miscellaneous Properties
Property
Value
Base Material
PI
Brand Family
Colors
Black
Density (g/cm3)
1.62
Water Absorption after 24 hrs immersion in water (%)
