Fillers

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Fillers

Particulate fillers such as calcium carbonate, carbon black, silica, talc and chopped cottonwere originally used in the early plastics as cost-cutting additives because their cost by weight was lower than that of polymers.

Although cost reduction remains a motivation, fillers are increasingly used to improve the performance of polymers such as their rigidity, creep resistance and hardness. Certain fillers have specialist roles improving key properties like heat dissipation, sound deadening, electrical conductivity and magnetic properties.