What Is SMC Plastic?

Written by tallulah philange
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What Is SMC Plastic?
SMC plastic is used for many car components. (corvette image by Julianna Olah from Fotolia.com)

Sheet-moulded composite (SMC) plastic is increasingly used in automobile production, thanks to its high strength-to-weight ratio. Auto manufacturers have begun developing their own forms of SMC plastic to tailor the material to their needs.

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Composition

SMC plastic usually is comprised of 45 per cent calcium carbonate, 25 per cent resin, 25 per cent glass reinforcement and 5 per cent of other elements, according to "Automotive Design & Production" magazine. The exact composition varies depending on what the plastic will be used for.

Uses

SMC plastic is a primary component in the exterior shells of passenger vehicles. The composite is heated and moulded into panels for doors, bonnets, boot hatches and the top of pickup beds.

Benefits

SMC plastic can be transformed by heating and moulding into many different parts, making it versatile. The glass in the composite makes the plastic stronger, but lighter than previous materials used for vehicle shells, giving cars better gas mileage. SMC plastic also is corrosion resistant.

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