A. Schulman BMC 620 Mineral Filled, Glass Fiber Reinforced Polyester Compound

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A. Schulman BMC 620 Mineral Filled, Glass Fiber Reinforced Polyester Compound
Categories:	Polymer; Thermoset; Filled/Reinforced Thermoset; Polyester, TS; Thermoset Polyester Glass and Mineral Filled BMC
Material Notes:	BMC 620 molding compound is a mineral filled, glass fiber-reinforced polyester compound suitable for compression, and stuffer injection molding It is characterized by good moldability high impact strength, excellent overall electrical properties and flame resistance. Typical applications include molded replacements for die castings, buss supports, circuit breaker housings, phase separators and contactor blocks.
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Physical Properties	Original Value	Comments

Specific Gravity	1.77 g/cc
Water Absorption	0.14 %	24 hours, 23°C
Linear Mold Shrinkage	0.0025 - 0.0035 cm/cm

Mechanical Properties	Original Value	Comments
Hardness, Barcol	36 - 45
Tensile Strength, Ultimate	5000 - 8000 psi
Flexural Strength	19000 - 23000 psi
Compressive Strength	22000 - 26000 psi
Izod Impact, Notched	6.00 - 9.00 ft-lb/in

Electrical Properties	Original Value	Comments
Dielectric Constant	5.2 @Frequency 60 Hz
Dielectric Strength	360 V/mil	Short Time
Dissipation Factor	0.020 @Frequency 60 Hz
Arc Resistance	190 sec
Comparative Tracking Index	>= 500 V

Thermal Properties	Original Value	Comments
Deflection Temperature at 1.8 MPa (264 psi)	>= 500 °F
Flammability, UL94	V-0 @Thickness 6.35 mm
	V-0 @Thickness 3.17 mm
	V-0 @Thickness 1.59 mm

Processing Properties	Original Value	Comments
Mold Temperature	280 - 330 °F

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PBMC022 / 27205

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