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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Ball Indentation Hardness	300 MPa	H961/30; ISO 2039/P1
Tensile Strength	55.0 MPa	ISO 527 - 1/2
Tensile Modulus	8000 MPa	ISO 527 - 1/2
Flexural Strength	95.0 MPa	ISO 178
Flexural Modulus	7500 MPa	ISO 178
Compressive Strength	250 MPa	ISO 604
Charpy Impact Unnotched	8.50 kJ/m²	ISO 179-1 eU
Charpy Impact, Notched	1.50 kJ/m²	ISO 179-1eA

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

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

Processing Properties	Original Value	Comments
Feed Temperature	60.0 - 75.0 °C	Injection molding
Nozzle Temperature	80.0 - 100 °C	Injection molding
Melt Temperature	80.0 - 100 °C	Injection molding
Mold Temperature	160 - 190 °C	Injection molding
	160 - 190 °C	Compression molding
Injection Pressure	>= 15.0 MPa	Compression and injection cavity mold pressure
Back Pressure	0.500 - 2.00 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
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

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