Clear polycarbonate sheets are often described as "self-extinguishing" or "self-extinguishing materials" due to their inherent flame resistance properties. This means that when a clear polycarbonate sheet is exposed to an open flame or heat source, it will not sustain combustion and will extinguish itself once the flame or heat source is removed. This property is important for safety and fire protection in various applications.

The flame resistance of clear polycarbonate sheets can be attributed to several factors:

High Ignition Temperature: Polycarbonate has a high ignition temperature, meaning it requires significant heat to ignite. This property makes it less susceptible to catching fire.

Low Flammability: When subjected to a flame, clear polycarbonate sheets release minimal heat and smoke, reducing the risk of fire spreading.

Self-Extinguishing: Once the flame source is removed, clear polycarbonate sheets stop burning, effectively extinguishing themselves. This behavior is in contrast to some materials that may continue to smolder or burn after the flame is removed.

Lack of Dripping: Clear polycarbonate sheets typically do not drip or produce flaming particles when exposed to fire. This property helps maintain safety in the event of a fire.

UL 94 Rating: Clear polycarbonate sheets often meet UL 94 flammability standards, with some sheets achieving a V-0 rating, which is the highest level of flame resistance in the UL 94 classification.

These flame-resistant properties make clear polycarbonate sheets suitable for a wide range of applications where safety and fire protection are essential, such as in the construction of safety barriers, security glazing, electrical enclosures, and other fire-sensitive environments.