A. Schulman BMC 680 Mineral Filled, Glass Fiber Reinforced Polyester Compound

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A. Schulman BMC 680 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 680 molding compound is a mineral filled, glass fiber-reinforced polyester compound suitable for compression and stuffer injection molding It is characterized by good moldability, very high impact strength, oil and solvent resistance and creep resistance at elevated temperatures. Typical applications include replacements for die castings and sheet molding compounds, valve covers, intake manifolds, oil pans and circuit breakers.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.71 g/cc	1.71 g/cc
Water Absorption	0.15 %	0.15 %	24 hours, 23°C
Linear Mold Shrinkage	0.0010 - 0.0020 cm/cm	0.0010 - 0.0020 in/in

Mechanical Properties	Metric	English	Comments
Hardness, Barcol	50 - 60	50 - 60
Tensile Strength, Ultimate	96.5 - 117 MPa	14000 - 17000 psi
Flexural Strength	207 - 241 MPa	30000 - 35000 psi
Compressive Strength	131 - 165 MPa	19000 - 24000 psi
Izod Impact, Notched	11.2 - 13.9 J/cm	21.0 - 26.0 ft-lb/in

Electrical Properties	Metric	English	Comments
Dielectric Strength	15.0 - 15.7 kV/mm	380 - 400 kV/in	Short Time
Arc Resistance	>= 180 sec	>= 180 sec
Comparative Tracking Index	>= 600 V	>= 600 V

Thermal Properties	Metric	English	Comments
Deflection Temperature at 1.8 MPa (264 psi)	>= 260 °C	>= 500 °F
Flammability, UL94	HB @Thickness 3.17 mm	HB @Thickness 0.125 in
	HB @Thickness 1.59 mm	HB @Thickness 0.0625 in
	V-0 @Thickness 6.35 mm	V-0 @Thickness 0.250 in

Processing Properties	Metric	English	Comments
Mold Temperature	138 - 166 °C	280 - 330 °F

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PBMC027 / 27210

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