A. Schulman BMC 685 Mineral Filled, Glass Fiber Reinforced Polyester Compound

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A. Schulman BMC 685 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 685 molding compound is a mineral filled, glass fiber-reinforced polyester compound suitable for compression, transfer and stuffer injection molding It is characterized by good moldability, 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	1.75 g/cc	1.75 g/cc
Water Absorption	0.11 %	0.11 %	24 hours, 23°C
Linear Mold Shrinkage	0.0015 - 0.0025 cm/cm	0.0015 - 0.0025 in/in

Mechanical Properties	Metric	English	Comments
Hardness, Barcol	55 - 65	55 - 65
Tensile Strength, Ultimate	62.1 - 82.7 MPa	9000 - 12000 psi
Flexural Strength	179 - 214 MPa	26000 - 31000 psi
Compressive Strength	179 - 214 MPa	26000 - 31000 psi
Izod Impact, Notched	7.47 - 10.1 J/cm	14.0 - 19.0 ft-lb/in

Electrical Properties	Metric	English	Comments
Dielectric Strength	15.4 - 16.1 kV/mm	390 - 410 kV/in	Short Time
Arc Resistance	>= 190 sec	>= 190 sec
Comparative Tracking Index	>= 500 V	>= 500 V

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

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

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PBMC028 / 27211

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