prepreg

Prepreg, short for "pre-impregnated," is a composite material made of fibers (like carbon or glass) that are pre-coated with a specific amount of resin. These materials are manufactured under controlled conditions to ensure consistent resin content and quality. Prepregs are stored cold to prevent curing until needed. When used, they are shaped and then heated to activate the resin, which hardens and bonds the fibers into a strong, lightweight composite. This process is common in aerospace, automotive, and sporting goods manufacturing, combining high strength with reduced weight for optimal performance.