A continuous fibre reinforcement pre-impregnated with a polymer resin which is then partially cured so that can be stored for later use.

The resin is often partially cured to a tack-free state called "B-staging."

Catalysts, inhibitors, flame retardants, and other additives may be included to obtain specific end-use properties and improve processing, storage, and handling characteristics.

See also: Resin.

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Subjects: Chemistry Mechanical Engineering