Self-cleaning Glass
Self-cleaning glass, a high light transmittance glass, is made by an advanced on-line high temperature pyrolytic spraying process. It coats float glass with a thin, hydrophilic nano-structure film having photo-catalytic activity, giving it multiple functions.
Its hydrophilicity makes water spread evenly, aiding cleaning. The long-term photocatalysis works even in low light, breaking down dirt. The coating keeps light transmittance like the substrate, with low reflectance (around 10%, sometimes 8%) and haze value (<0.8%). It’s durable, lasting over 15 years.
Applicable Range
It’s widely used. In architecture, it keeps facades, shop fronts, and display windows of buildings clean, and lets natural light in. Also used in rearview mirrors for clear vision, on solar battery shells for protection, and in bathrooms for convenience.
Self-cleaning Mechanism
It self-cleans in two steps. First, sunlight triggers a reaction in the titanium dioxide coating, generating electrons and holes that oxidize dirt into carbon dioxide and water. Second, hydrophilicity makes water form sheets to wash away loosened dirt. A slight incline helps drainage, and little sunlight can activate the coating.
Performance Factors
Performance varies. Greasy dirt takes more time to clean than dust. More dirt accumulation and better light & rain exposure improve cleaning. Vertical installation is optimal.
Advantages
Less frequent cleaning.
Easier cleaning.
Cost savings.
Clear vision in all weather.
Aesthetically blends with regular glass.
Environmentally friendly.