The coefficient of friction test is a core indicator, and the dynamic friction performance of aluminum foil and aluminum foil tissue paper needs to be evaluated by simulating actual use scenarios.
Aluminum foil surfaces are typically anodized or coated to form a dense oxide film or functional coating.
Passivation treatment is a process that uses chemical reagents to form a thin and dense passivation film on the surface of aluminum foil, thereby improving its corrosion resistance.
The impact of repeated use on the crease resistance of aluminum foil lunch boxes is essentially a cumulative process of mechanical stress and material fatigue.
This microbial barrier property plays a crucial role in ensuring food safety and extending shelf life.
If the incoming material has problems such as wavy edges, loose middle or uneven thickness, it is easy to cause wrinkles due to local elongation differences during stamping and stretching.