Which attribute is most important for an adhesive used in filters?

When selecting an adhesive for use in filters, the flash point is a critical attribute because it indicates the temperature at which the adhesive can ignite when exposed to an open flame or spark. For applications involving filters, which often deal with airflow and may be subject to heat and pressure, selecting an adhesive with an appropriate flash point is essential for safety and performance. This characteristic helps ensure that the adhesive remains stable and does not decompose or ignite under the operating conditions of the filter.

Other attributes like color, odor, and cost, while they may hold some relevance under specific circumstances, do not address the fundamental safety issues associated with the adhesive's application in a filter. The color of the adhesive does not typically impact its performance or effectiveness in that context, and odor is more related to the user experience during application rather than the adhesive's functional properties. Cost is certainly an important factor in many purchasing decisions, but it should be secondary to safety attributes like the flash point, particularly in applications that may involve heat or ignition risks.