3M™ Scotch-Weld™ Structural Core Splice Adhesive Film AF 3074 FST is a thermally expanding epoxy adhesive film designed for honeycomb core splicing, reinforcement and edge filling processes typically used in aircraft part fabrication.
The film is easy to cut, handle and reposition during the lay-up process and is cocurable with adhesive films and prepregs in 120°C to 180°C cure cycles. In addition, AF 3074 FST offers a consistent expansion ratio (up to 230%) which can be adjusted through temperature ramp-up rate depending on the needs of the application. With excellent mechanical strength, FST properties, and the option to store at room temperature for 6 months (when stored in sealed original packaging); AF 3074 FST is a versatile core splice adhesive film suitable for a wide variety of cabin interior and aero-structure honeycomb part applications.
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Reliable expansion ratio of up to 230% (>3x the thickness of the uncured film)
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Wide in-service temperature range
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FST tested according to FAR/JAR/CS 25.853(a) App F, part I(a)(1)(ii) and ABD0031
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Easy to handle, cut, and reposition during lay-up process
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Cocurable with structural adhesive films and prepregs in 120°C to 180°C cure cycles
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Long shop life (up to 30 days storage at room temperature outside of the protective bag)
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Suitable for storage at room temperature for 6 months from the date of manufacturing, when stored in the sealed protective bag