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Sheet molding compound (SMC) resin is a fiberglass-based compression molding that is used in applications that require high strength. SMC is comprised of several materials including fiberglass, polymer resin, release agents and thickeners.
SMC fiberglass mixture is sheathed on the bottom and top by polyethylene or nylon plastic to keep the mixture from automatically adhering to a surface. The SMC mixture is first spread evenly on the bottom sheath of polyethylene, at which point small chunks of fiberglass are mixed into the paste. The top layer of polyethylene is then placed on top of the product, which is rolled into various thicknesses.
SMC is extremely durable, offering excellent chemical, thermal and physical characteristics. It can withstand extended periods of exposure to heat and corrosive environments and can be molded into many different shapes and sizes.
Because of its durability SMC fiberglass is used in a variety of applications, including automobile panels, watercraft parts, and heating, ventilating and air conditioning (HVAC) systems. SMC is also a poor conductor of electricity, making it ideal for electrical applications.