SMC

SMC: In a typical SMC manufacturing process a first layer of continuous polyethylene or Cellophane film is coated with a formulated polyester resin system into which a layer of either chopped strand mat or chopped ravings is placed. 

A second layer of polyethylene film, similarly coated with resin system, is placed over the first resin coated and reinforcement deposited polyethylene layer. The sandwich thus formed is passed through with a series of roller to press the glass fiber into the resin and ensure thorough wetting of the reinforcement by the resin. The sandwich is then wound into a roll and allowed to stand while the resin thickens. In use the SMC is cut to the shape and the both layers of polyethylene film are removed.