Sheet Molding Compound for Plastics

The subject of sheet molding compound (SMC) is introduced here because (1) they are commercially important, (2) they make use of many of the additives discussed in the 

Before use, the sheets are cut to size and the polyethylene stripped off. They are then placed in a heated compression-type mold (several layers may be stacked for greater thicknesses) where true cure (crosslinking) of the polyester takes place. 

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