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BMC 685

Thermoset Polyester

Glass\Mineral

Supplied by Bulk Molding Compounds, Inc.

The technical datasheet with complete property values for BMC 685 is available to members of the Prospector Plastics Database.
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Product Description
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.

BMC 685 molding compound is produced in extruded form in a range of industrial colors. It is available in logs up to 12 inches in length or as precut slugs, of specific weight, in diameters 1 in to 2.5 in. Within this range, smaller diameters are supplied as multiple extrusions and weight tolerances are plus or minus 5 %, up to a maximum of plus or minus 15 grams.
General  
Material Status 
  • Commercial: Active
Availability 
  • North America
Filler / Reinforcement 
  • Glass\Mineral
Features 
  • Good Creep Resistance
  • Good Moldability
  • Oil Resistant
  • Solvent Resistant
  
Uses 
  • Automotive Applications
  • Automotive Under the Hood
  
Automotive Specifications 
Appearance 
  • Colors Available
Forms 
  • BMC - Bulk Molding Compound
Processing Method 
  • Compression Molding
  • Injection Molding
  • Resin Transfer Molding
Physical
Nominal Value
Unit
Test Method
Specific Gravity
 
 ASTM D792
Molding Shrinkage - Flow
in/in
 ASTM D955
Water Absorption (73°F, 24 hr)
%
 ASTM D570
Mechanical
Nominal Value
Unit
Test Method
Tensile Strength
psi
 ASTM D638
Flexural Strength
psi
 ASTM D790
Compressive Strength
psi
 ASTM D695
Impact
Nominal Value
Unit
Test Method
Notched Izod Impact
ft·lb/in
 ASTM D256
Hardness
Nominal Value
Unit
Test Method
Barcol Hardness
 
 ASTM D2583
Thermal
Nominal Value
Unit
Test Method
Deflection Temperature Under Load (264 psi, Unannealed)
°F
 ASTM D648
Electrical
Nominal Value
Unit
Test Method
Dielectric Strength 2
V/mil
 ASTM D149
Arc Resistance
sec
 ASTM D495
Flammability
Nominal Value
Unit
Test Method
Flame Rating - UL
     UL 94
0.0625 in
 
  
0.125 in
 
  
0.250 in
 
  
UL
Nominal Value
Unit
Test Method
Comparative Tracking Index (CTI)
V
 UL 746
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: BMC 685, BMC , BMC685, 685, Polyester, Thermoset, Polyester Thermoset, Polyester, TS, Polyester TS, Thermoset, TS, Bulk Molding, PolyesterThermoset, PolyesterTS
Features
Features may also be described by the following terms: Good Moldability, Good Creep Resistance, Creep Resistant.
Uses
Uses may also be described by the following terms: Automotive Applications, Automotive Sector.
Automotive Specifications
This plastic material has approval for 1 automotive specifications from the following agencies (the number in parentheses shows the number of specifications for that agency): GM (1).
Notes
1Typical properties: these are not to be construed as specifications.
2Method A (Short-Time)
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.