Carbon Fiber Fabric Repair Prepreg, 125°C (250°F) Vacuum Curing Part 4 - Purchasing Specification for Film Adhesive
AMS3970/4
AMS 3970/4 specifies the batch release and delivery requirements for film adhesive used for repair. This specification is applicable when the film adhesive is part of the prepreg system as defined in AMS 3970 and AMS 3970/1.
Rationale: The main updates of the AMS3970 family are:
-Harmonization of requirements with AMS6885
- Storage life extension procedures
- Clarified shipping and storage conditions
- Additional cure cycles for M20 /40%/G904 to support thick repairs and higher in-service temperatures
- Re-qualifying the non-structural M20 glass prepreg due to changes in the manufacture process by Hexcel and due to introduction of a new resin content
