The vermiculite coating enhances the fire resistance of fibreglass cloth through several mechanisms:

Insulation: Vermiculite is a mineral that expands when exposed to high temperatures. The expansion creates air pockets within the vermiculite coating, which act as insulating barriers. These pockets of air help to reduce heat transfer, thereby slowing down the temperature rise on the fibreglass cloth and protecting the underlying material.

Heat Reflection: The vermiculite coating has reflective properties, meaning it can reflect a significant amount of radiant heat away from the fibreglass cloth. This helps to prevent the cloth from absorbing excessive heat and minimizes the risk of ignition.

Flame Resistance: When subjected to high temperatures, the vermiculite coating undergoes a process known as exfoliation. This process involves the expansion of the vermiculite particles, forming a low-density layer. The expanded vermiculite layer acts as a barrier, preventing flames from reaching the fibreglass cloth and limiting the spread of fire.

Smoke Suppression: Vermiculite has inherent smoke-suppressing properties. When exposed to fire, the vermiculite coating can help reduce the production and release of smoke and harmful gases. This can be beneficial in fire protection scenarios, as it enhances visibility and minimizes potential respiratory hazards.

By combining these mechanisms, the vermiculite coating effectively enhances the fire resistance of fibreglass cloth. It helps to delay the ignition time, reduce flame spread, limit heat transfer, and provide additional time for fire containment and suppression efforts.

It's worth noting that the specific performance of Vermiculite Coated Fibreglass Cloth can vary depending on the quality and thickness of the vermiculite coating, as well as the specific construction and composition of the fibreglass cloth. Therefore, it's important to consult the manufacturer or supplier for detailed information on the fire resistance capabilities of a particular product.