Thermosets
SMC/BMC for Automotive — Sheet Molding Compound / Bulk Molding Compound
SMC and BMC are composite materials based on thermosetting polymers (typically unsaturated polyester or vinyl ester resins) reinforced with glass fibers. They are highly moldable and offer excellent mechanical properties, making them ideal for complex automotive body panels and structural components.
SMCBMCBaydurProlog
Manufacturers
3
Grades
2
Applications
5
Equivalents
0
Physical Properties
- Density
- 1.60-1.90 g/cm³
- Water Absorption (24h)
- 0.1-0.5 %
- Transparency
- Opaque
- Shrinkage
- 0.5-1.5 %
Mechanical Properties
- Young's Modulus
- 10-20 GPa
- Tensile Strength
- 80-150 MPa
- Elongation at Break
- 1-3 %
- Impact Strength (Izod)
- 20-50 J/m
Thermal Properties
- Glass Transition Temperature
- 80-120 °C
- Melting Point
- N/A
- Continuous Service Temperature
- 100-150 °C
- Heat Deflection Temperature
- 80-120 °C
Electrical Properties
- Dielectric Constant
- 4.5-6.0
- Volume Resistivity
- 10^12-10^14 Ohm-cm
- Dielectric Strength
- 15-25 kV/mm
Chemical Resistance
- Acids
- Good resistance
- Bases
- Moderate resistance
- Solvents
- Good resistance to hydrocarbons
- UV Resistance
- Moderate without additives
Sustainability
- Recyclability
- Difficult
- Recycling Code
- N/A
- Carbon Footprint
- Moderate
Manufacturing compatibility
Compression MoldingInjection Molding
Applications
Automotive body panels (hoods, fenders)
Structural components
Electrical enclosures
Building panels
Appliance housings
Available grades
BMC CompositeSMC Composite 100