Technical datasheet

Bakelite® UP 3720

Supplied byBakelite Synthetics- Last Updated on Feb 6, 2026

Bakelite® UP 3720 by Bakelite Synthetics is a styrene-free, polyester grade reinforced with organic filler.
  • It exhibits very slight post shrinkage, very good- electrical properties, friction properties and dimensional stability.
  • It offers low shrinkage and high arc resistance.
  • It is processed by compression- and injection molding.
  • Bakelite® UP 3720 is recommended for bearings, guide rails, crossbars, micro switches and regulator switch cylinders.
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Bakelite® UP 3720 properties

Electrical properties

PropertiesValue & unitTest conditionTest method
Dielectric Constant0.0 Visible After LoginVisible After LoginVisible After Login
Dielectric Strength0.0 Visible After LoginVisible After LoginVisible After Login
Dissipation Factor0.0 Visible After LoginVisible After LoginVisible After Login
Proof Tracking Index0.0 Visible After LoginVisible After LoginVisible After Login
Surface Resistivity0.0 Visible After LoginVisible After LoginVisible After Login
Volume Resistivity0.0 Visible After LoginVisible After LoginVisible After Login

Flammability properties

PropertiesValue & unitTest conditionTest method
Flame Rating, UL 940.0 Visible After LoginVisible After LoginVisible After Login
Flame Rating, UL 940.0 Visible After LoginVisible After LoginVisible After Login

Mechanical properties

PropertiesValue & unitTest conditionTest method
Compressive Strength0.0 Visible After LoginVisible After LoginVisible After Login
Flexural Modulus0.0 Visible After LoginVisible After LoginVisible After Login
Flexural Strength0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Charpy0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Notched Charpy0.0 Visible After LoginVisible After LoginVisible After Login
Modulus of Elasticity0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Strength0.0 Visible After LoginVisible After LoginVisible After Login

Other properties

PropertiesValue & unitTest conditionTest method
Density, Bulk0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Ball Indentation0.0 Visible After LoginVisible After LoginVisible After Login

Physical properties

PropertiesValue & unitTest conditionTest method
Density0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Water Absorption0.0 Visible After LoginVisible After LoginVisible After Login

Thermal properties

PropertiesValue & unitTest conditionTest method
Deflection Temperature at 8 MPa0.0 Visible After LoginVisible After LoginVisible After Login

Bakelite® UP 3720 Processing Guidelines

Compression Molding/Injection Processing Guidelines

PropertiesValue & unitTest conditionTest method
Mold TemperatureVisible After LoginVisible After Login
Molding PressureVisible After LoginVisible After Login

Injection Processing Guidelines

PropertiesValue & unitTest conditionTest method
Barrel Feed Zone TemperatureVisible After LoginVisible After Login
Barrel Nozzle Zone TemperatureVisible After LoginVisible After Login

Injection Molding Processing Guidelines

PropertiesValue & unitTest conditionTest method
Back PressureVisible After LoginVisible After Login
Holding PressureVisible After LoginVisible After Login
Temperature of materialVisible After LoginVisible After Login

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