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What is sheet molding compound (SMC)

Although the chemical properties of sheet molding compound (SMC) are similar to those of bulk molding compound (BMC), the manufacturing process is quite different. SMC is made into a sheet shape, so it is easier to be used in various fields, and its mechanical strength is much more prominent than its thermoset family counterparts. SMC usually contains 10-65% fiber-reinforced material, which is composed of strips of chopped glass fibers ranging in length from 1/2 to 2 inches (or 12.7 to 50.8 mm).