ISO/TS 21237 is a standard that discusses the specification and measurement methods for nanotechnologies. ISO/TS 21237 describes the measurement methods for determining the individual characteristics.
ISO/TS 21237 specifies the characteristics to be measured of air filter media containing polymeric nanofibres on the surface of a substrate.
Note: ISO/TS 21237 does not cover the characteristics specific to health and safety issues.
ISO/TS 21237 on air filter media containing polymeric nanofibres is applicable to:
Air filter media play an important role in the performance and efficiency of different types of air filters. In this respect, most air filter media take advantage of nonwovens to separate solid or liquid particles. In recent years, air filter media containing nanofibres have been commercialized and widely used by different industries.
In this regard, ISO/TS 21237 specifies the mandatory characteristics to be measured and their corresponding measurement methods. The mandatory characteristics include fibre diameter and morphology. Meanwhile, non-mandatory characteristics include surface area, chemical composition content, thermal stability and crystallinity, amongst others. The surface area and crossed-fibres porosity of the formed nonwoven layer are mainly affected by the nanofibre diameter as well as the morphology.
Compliance with the necessary measurement methods specified by ISO/TS 21237, can ultimately help ensure optimum filter efficiency.
Overall, ISO/TS 21237 facilitates communication between sellers and buyers and supports the growing trade of this new class of air filter media.
ISO/TS 21237