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Sumitomo Bakelite North America E 3938A Hardware Grade Epoxy

Category Polymer , Thermoset , Epoxy , Epoxy, High Temperature , Epoxy, Molded, Glass Fiber Filler , Filled/Reinforced Thermoset
Manufacturer Sumitomo Bakelite North America
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Sumitomo Bakelite North America E 3938A Hardware Grade Epoxy.pdf
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Material Notes:
Fiberglass reinforced epoxy molding compound with excellent dimensional stability, good strength and excellent electrical insulation properties.Information provided by Vyncolit, a Sumitomo Bak Group
Physical Properties Metric English Comments
Bulk Density 0.750 g/cc
0.0271 lb/in³
Powder Density; ASTM D1895
Density 1.90 g/cc
0.0686 lb/in³
Relative Density; ASTM D792
Water Absorption 0.20 %

@Temperature 50.0 °C,
Time 173000 sec
0.20 %

@Temperature 122 °F,
Time 48.0 hour
ASTM D570
Linear Mold Shrinkage 0.0010 cm/cm
0.0010 in/in
Compression Molding; ASTM D955
Mechanical Properties Metric English Comments
Tensile Strength at Break 85.0 MPa
12300 psi
ASTM D638
Flexural Strength 160 MPa
23200 psi
At Rupture; ASTM D790
Compressive Strength 250 MPa
36300 psi
ASTM D695
Izod Impact, Notched 0.270 J/cm
0.506 ft-lb/in
ASTM D256
Thermal Properties Metric English Comments
CTE, linear 28.0 µm/m-°C

@Temperature 20.0 °C
15.6 µin/in-°F

@Temperature 68.0 °F
Perpendicular; ASTM E-831
CTE, linear, Parallel to Flow 19.0 µm/m-°C

@Temperature 20.0 °C
10.6 µin/in-°F

@Temperature 68.0 °F
ASTM E-831
Deflection Temperature at 1.8 MPa (264 psi) 215 °C
419 °F
As molded; ASTM D648A
>= 282 °C
>= 540 °F
Post Baked; ASTM D648A
Oxygen Index 33.5 %
33.5 %
ASTM D2863
Electrical Properties Metric English Comments
Dielectric Constant 4.1

@Frequency 1e+6 Hz
4.1

@Frequency 1e+6 Hz
Wet; ASTM D150
Dielectric Strength 16.4 kV/mm
417 kV/in
60Hz, Short Time, dry; ASTM D149
Dissipation Factor 0.010

@Frequency 1e+6 Hz
0.010

@Frequency 1e+6 Hz
wet; ASTM D150
Arc Resistance 186 sec
186 sec
ASTM D495
Descriptive Properties Value Comments
Color Black, Blue
Form Granular
Main Filler Glass Fiber
Molding Method Compression, transfer
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