Hinges in Huawei Mate X5 and Samsung Z Fold5 now endure 1 million folds—powered by phenyl silicone oil lubricants. This oil fills microscopic gaps in hinges, forming permanent, oxidation-resistant lubrication films with a ultra-low friction coefficient (0.03), outperforming mineral oils. A Dongguan-based supplier confirms its silicone oil is certified by Xiaomi and OPPO; just 0.1g per device reduces hinge noise failure rates by 90%. As global foldable phone sales surpass 20 million units, specialty silicone oils enter explosive growth. Products-IOTA