Sumitomo Bakelite DurezÂ® 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 DurezÂ® 25378 Phenolic, Compression Grade.pdf
Price	EMAIL US sales@lookpolymers.com

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/inÂ³	ASTM D792
Apparent Bulk Density	0.680 g/cc	0.0246 lb/inÂ³	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 Â°C @Thickness 3.0 mm	320 Â°F @Thickness 0.12 in	UL Temperature Index
Deflection Temperature at 1.8 MPa (264 psi)	204 Â°C	399 Â°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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