Bakelite® UP 3720 Unsaturated Polyester Resin, UL Listed, Low Shrinkage, High Arc Resistance

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Bakelite® UP 3720 Unsaturated Polyester Resin, UL Listed, Low Shrinkage, High Arc Resistance
Categories:	Polymer; Thermoset; Filled/Reinforced Thermoset; Polyester, TS; Thermoset Polyester Glass Filled BMC
Material Notes:	Polyester molding compound, mainly organically filled, styrene free, very slight post shrinkage, very good electrical properties, very good sliding friction properties, dimensionally stable, UL listed molding compound 0,8 mm / V1 (ALL), 1,5 mm / V-0 (ALL) Applications: Bearings, guide rails, cross bars, micro switches, regulator switch cylinders.
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Physical Properties	Original Value	Comments

Density	1.74 g/cc	ISO 1183
Apparent Bulk Density	0.640 g/cc	ISO 60
Linear Mold Shrinkage	0.0035 cm/cm	Compression Molding. Post Shrinkage = 0.1%.; ISO 2577
	0.0075 cm/cm	Injection Molding. Post Shrinkage = 0.15%.; ISO 2577

Mechanical Properties	Original Value	Comments
Ball Indentation Hardness	250 MPa	H961/30; ISO 2039/P1
Tensile Strength	45.0 MPa	ISO 527 - 1/2
Tensile Modulus	9000 MPa	ISO 527 - 1/2
Flexural Strength	90.0 MPa	ISO 178
Flexural Modulus	8000 MPa	ISO 178
Compressive Strength	150 MPa	ISO 604
Charpy Impact Unnotched	9.00 kJ/m²	ISO 179-1 eU
Charpy Impact, Notched	2.20 kJ/m²	ISO 179-1eA

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+12 ohm-cm
Surface Resistance	1.00e+11 ohm
Dielectric Constant	5.0 @Frequency 100 Hz
Dielectric Strength	32.5 kV/mm @Thickness 1.00 mm	IEC 60243-P1
Dissipation Factor	0.030 @Frequency 100 Hz
Arc Resistance	180 - 185 sec	ASTM D495
High Voltage Arc Resistance to Ignition (HVAR)	>= 300 sec @Thickness 1.50 mm	(ALL)
Comparative Tracking Index	600 V
Hot Wire Ignition, HWI	15 - 30 sec @Thickness 0.800 mm	ALL
	60 - 120 sec @Thickness 1.50 mm	(ALL)
	>= 120 sec @Thickness 3.00 mm	ALL
High Amp Arc Ignition, HAI	>= 120 arcs @Thickness 0.800 mm	ALL
High Voltage Arc-Tracking Rate, HVTR	0.000 - 10.0 mm/min @Thickness 3.00 mm	ALL

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	140 °C	<20000 hours; IEC 60216-P1
	190 °C	< 50 hours; IEC 60216-P1
Deflection Temperature at 8.0 MPa	70.0 °C	ISO 75-2
UL RTI, Electrical	130 °C @Thickness 0.800 mm	ALL
UL RTI, Mechanical with Impact	130 °C @Thickness 0.800 mm	ALL
UL RTI, Mechanical without Impact	130 °C @Thickness 0.800 mm	ALL
Flammability, UL94	V-1 @Thickness 0.800 mm	All colors
	V-0 @Thickness 1.50 mm	All colors

Processing Properties	Original Value	Comments
Feed Temperature	60.0 - 70.0 °C	Injection molding
Nozzle Temperature	70.0 - 100 °C	Injection molding
Melt Temperature	70.0 - 100 °C	Injection molding
Mold Temperature	160 - 180 °C	Injection molding
	160 - 180 °C	Compression molding
Injection Pressure	>= 10.0 MPa	Compression and injection cavity mold pressure
Back Pressure	0.500 - 1.00 MPa	Injection molding
Cure Time	10.0 - 20.0 sec	Per 1 mm of wall thickness, injection molding
	20.0 - 40.0 sec	Per 1 mm of wall thickness, compression molding

Descriptive Properties
Creep Rupture Strength	Medium
Holding Pressure	Approximately 40-60% of injection pressure
Media Resistance	Medium
Thermal Expansion	Slight
Water absorption (mg)	50	24h / 23°C

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