Sheet molding compound (SMC) and bulk molding compound (BMC) are thermoset composite materials used for high-strength, lightweight components in automotive, electrical, and industrial applications. Both are made from a mixture of resin, glass fibers, fillers, and additives, but differ in form—SMC comes in sheet form, while BMC is a bulk paste.
SMC is widely used in car body panels, truck hoods, and structural components due to its strength, dimensional stability, and resistance to corrosion. BMC, being more flowable, is ideal for molding intricate parts like electrical housings, circuit breakers, and appliance parts.
These materials offer excellent mechanical properties, flame resistance, and thermal stability, while being lightweight and cost-effective. As industries seek alternatives to metals and traditional plastics, SMC and BMC are gaining ground for their moldability and performance under stress.
Their use is expected to expand with the rise of electric vehicles, smart electronics, and lightweight construction.