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Sumitomo Bakelite Durez® 25378 Phenolic, Compression Grade

Category Polymer , Thermoset , Phenolic , Phenolic, Novolac, Heat Resistant Grade, Filled
Manufacturer Sumitomo Bakelite High Peformance Plastics
Trade Name Durez®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Sumitomo Bakelite Durez® 25378 Phenolic, Compression Grade.pdf
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Material Notes:
Durez 25378 Black Phenolic is a two stage heat resistant/electrical grade molding material having an excellent molded finish, low shrinkage and good heat resistance. Durez 25378 has exceptional UL flammability ratings and good comparative tracking index.Information provided by Sumitomo Bak North America, Inc.
Physical Properties Metric English Comments
Density 1.61 g/cc
0.0582 lb/in³
ASTM D792
Apparent Bulk Density 0.680 g/cc
0.0246 lb/in³
ASTM D1895
Water Absorption 0.20 %
0.20 %
ASTM D570
Linear Mold Shrinkage 0.0040 cm/cm
0.0040 in/in
ASTM D955
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate 45.0 MPa
6530 psi
ASTM D638
Tensile Modulus 10.3 GPa
1490 ksi
ASTM D638
Flexural Strength 69.0 MPa
10000 psi
Compressive Strength 158 MPa
22900 psi
ASTM D695
Thermal Properties Metric English Comments
Maximum Service Temperature, Air 160 °C

@Thickness 3.0 mm
320 °F

@Thickness 0.12 in
UL Temperature Index
Deflection Temperature at 1.8 MPa (264 psi) 204 °C
399 °F
ASTM D648
Flammability, UL94 V-0

@Thickness 0.510 mm
V-0

@Thickness 0.0201 in
V-0

@Thickness 1.50 mm
V-0

@Thickness 0.0591 in
5VA

@Thickness 3.30 mm
5VA

@Thickness 0.130 in
Electrical Properties Metric English Comments
Electrical Resistivity 1.00e+12 ohm-cm
1.00e+12 ohm-cm
ASTM D257
Dielectric Constant 4.9

@Frequency 1e+6 Hz
4.9

@Frequency 1e+6 Hz
ASTM D150
Dielectric Strength 12.8 kV/mm
325 kV/in
Step by step; ASTM D149
16.7 kV/mm
424 kV/in
Short Time; ASTM D149
Dissipation Factor 0.040

@Frequency 1e+6 Hz
0.040

@Frequency 1e+6 Hz
ASTM D150
Arc Resistance 180 sec
180 sec
ASTM D495
Comparative Tracking Index 220 V
220 V
IEC Tracking Index
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