What is the minimum flash point for liquid adhesive coatings used on filters?

The minimum flash point for liquid adhesive coatings used on filters is set to ensure safety and compliance with relevant safety standards. A flash point is the lowest temperature at which the vapors of a volatile substance ignite when exposed to an open flame or spark. In the context of adhesive coatings, a higher flash point indicates a lower risk of flammability, which is particularly important in environments where heat or ignition sources may be present.

Selecting a flash point of 325°F for liquid adhesive coatings balances the need for effective performance of the adhesive while also prioritizing safety. Coatings with a flash point below this threshold could pose a significant fire hazard, especially in applications where heat is involved in the filtering process. Therefore, while higher flash points are present in the other answer choices, the selected value of 325°F is in line with established standards for safe use in mechanical and HVAC applications, making it the correct choice.