What electrical checks are useful?
Surface resistance, shielding performance, continuity after cutting or folding and contact resistance where relevant.
What mechanical checks are useful?
Flexibility, fraying, adhesion, lamination compatibility, cutting behavior and dimensional stability.
Why test the final assembly?
The finished product introduces seams, openings, closures and interfaces that are not represented by a flat sample.
Project note: Use supplier data as a starting point. Validate the finished assembly at the relevant frequencies and environmental conditions.