Bakelite® PF 31 Phenolic Formaldehyde Resin, UL Listed

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Bakelite® PF 31 Phenolic Formaldehyde Resin, UL Listed
Categories:	Polymer; Thermoset; Filled/Reinforced Thermoset; Phenolic
Material Notes:	Phenolic molding compound, mainly organically filled, standard molding compound for normal stress, UL listed molding compound 1.5 mm / V-1 (ALL), 3.0 mm / V-0 (ALL). Applications: General purpose for moldings of all kinds from small to large parts, Bobbins, MCB housings, insulating caps, electrical switch gears, electrical installation material, operating elements, ashtrays, cookware fittings
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Physical Properties	Metric	English	Comments

Density	1.42 g/cc	0.0513 lb/in³	ISO 1183
Apparent Bulk Density	0.650 g/cc	0.0235 lb/in³	ISO 60
Linear Mold Shrinkage	0.0055 cm/cm	0.0055 in/in	Compression Molding. Post Shrinkage = 0.45%.; ISO 2577
	0.0085 cm/cm	0.0085 in/in	Injection Molding. Post Shrinkage = 0.55%.; ISO 2577

Mechanical Properties	Metric	English	Comments
Ball Indentation Hardness	300 MPa	43500 psi	H961/30; ISO 2039/P1
Tensile Strength	55.0 MPa	7980 psi	ISO 527 - 1/2
Tensile Modulus	8.00 GPa	1160 ksi	ISO 527 - 1/2
Flexural Strength	95.0 MPa	13800 psi	ISO 178
Flexural Modulus	7.50 GPa	1090 ksi	ISO 178
Compressive Strength	250 MPa	36300 psi	ISO 604
Charpy Impact Unnotched	0.850 J/cm²	4.04 ft-lb/in²	ISO 179-1 eU
Charpy Impact, Notched	0.150 J/cm²	0.714 ft-lb/in²	ISO 179-1eA

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+11 ohm-cm	1.00e+11 ohm-cm
Surface Resistance	1.00e+10 ohm	1.00e+10 ohm
Dielectric Constant	10.5 @Frequency 100 Hz	10.5 @Frequency 100 Hz
Dielectric Strength	22.5 kV/mm @Thickness 1.00 mm	572 kV/in @Thickness 0.0394 in	IEC 60243-P1
Dissipation Factor	0.30 @Frequency 100 Hz	0.30 @Frequency 100 Hz
Arc Resistance	60 - 120 sec @Thickness 3.00 mm	60 - 120 sec @Thickness 0.118 in	ALL
Comparative Tracking Index	125 V	125 V
Hot Wire Ignition, HWI	60 - 120 sec @Thickness 1.50 mm	60 - 120 sec @Thickness 0.0591 in	(ALL)
	>= 120 sec @Thickness 3.00 mm	>= 120 sec @Thickness 0.118 in	ALL
High Amp Arc Ignition, HAI	60 - 120 arcs @Thickness 1.50 mm	60 - 120 arcs @Thickness 0.0591 in	(ALL)

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	140 °C	284 °F	<20000 hours; IEC 60216-P1
	180 °C	356 °F	< 50 hours; IEC 60216-P1
Deflection Temperature at 8.0 MPa	120 °C	248 °F	ISO 75-2
UL RTI, Electrical	150 °C @Thickness 1.50 mm	302 °F @Thickness 0.0591 in	(ALL)
UL RTI, Mechanical with Impact	150 °C @Thickness 1.50 mm	302 °F @Thickness 0.0591 in	(ALL)
UL RTI, Mechanical without Impact	150 °C @Thickness 1.50 mm	302 °F @Thickness 0.0591 in	(ALL)
Flammability, UL94	V-1 @Thickness 1.50 mm	V-1 @Thickness 0.0591 in	All colors
	V-0 @Thickness 3.00 mm	V-0 @Thickness 0.118 in	All colors

Processing Properties	Metric	English	Comments
Feed Temperature	60.0 - 75.0 °C	140 - 167 °F	Injection molding
Nozzle Temperature	80.0 - 100 °C	176 - 212 °F	Injection molding
Melt Temperature	80.0 - 100 °C	176 - 212 °F	Injection molding
Mold Temperature	160 - 190 °C	320 - 374 °F	Injection molding
	160 - 190 °C	320 - 374 °F	Compression molding
Injection Pressure	>= 15.0 MPa	>= 2180 psi	Compression and injection cavity mold pressure
Back Pressure	0.500 - 2.00 MPa	72.5 - 290 psi	Injection molding
Cure Time	0.167 - 0.333 min	0.00278 - 0.00556 hour	Per 1 mm of wall thickness, injection molding
	0.333 - 0.667 min	0.00556 - 0.0111 hour	Per 1 mm of wall thickness, compression molding

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

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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