prepreg otherwise pre-impregnated material; pre-preg (rus. препрег) — semi-finished polymer composite material obtained by impregnating a fibrous reinforcement with a polymer binder.

Description

Prepregs are produced by impregnating a fibrous base (fabric, scrim, etc.) with a pre-catalyssed polymer system, a binder. Most commonly, moulding the final part using prepregs with thermoset binders is a three-stage process: laying the prepreg in a given shape; heating under vacuum to a temperature of resin transition to a plastic condition (for example, 120-180°C for an epoxy binder) resulting in the material taking the desired shape; further heating to the curing temperature of the binder.

The fibrous base can be made of glass, cotton, carbon and some other types of fillers. The most commonly used binders are epoxy, polyester, phenolic and polyimide resins.

Illustrations

Prepregs based on carbon tissue with epoxy binder as a commercial product of CJSC Holding Compa
Prepregs based on carbon tissue with epoxy binder as a commercial product of CJSC Holding Company Composite.

Author

  • Goldt Ilya V.

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