Prepreg covers reinforcement fabrics — typically carbon, glass, or aramid fibre in unidirectional tape or woven cloth form — pre-impregnated with a controlled quantity of partially cured thermoset or thermoplastic matrix resin, supplied in roll form under refrigerated storage and processed via autoclave cure, out-of-autoclave (OOA) methods, or automated fibre placement (AFP) to produce structural aerospace laminates.
How many distinct aircraft programmes each supplier in this area is linked to in our database — a proxy for how widely established a company is across the industry. Bars are relative to the top-ranked supplier.
Whether supply here is concentrated in a few big players or spread across many. Top-5 share is the portion of all programme links held by the five largest suppliers. HHI (Herfindahl–Hirschman Index) runs 0–10,000: under ~1,500 is competitive, over ~2,500 is concentrated.
Where the listed suppliers in this area are based, by country of head office. Useful for sourcing, near-shoring and understanding regional strengths.