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STRETCHVAC3000 from Richmond Aerovac (Keighley, West Yorkshire, U.K.) is the company’s newest addition to its line of vacuum-bagging films. Suitable for extended high-temperature autoclave cures, the film is compatible with the majority of commonly used aerospace-grade resin systems, including bismaleimides (BMIs). The company reports that a major aerospace manufacturer recently qualified and switched to the new bagging film, citing good adhesion to sealant tape, retention of mechanical properties during lengthy cure cycles (10-plus hours) and improved performance quality compared to other aerospace-approved vacuum bagging films.