Average fiber diameter of fiber glass mats

This method covers the determination of the average fiber diameter (or distribution of diameters) of fibers used in nonwoven fiber glass mats.

Samples of glass fiber extracted from the mat are cut into short lengths. The fibers are then mounted onto a glass slide and placed on a gridded microscope stage. Fiber diameters are recorded for each sample and the average fiber diameter is recorded as the average of these readings.