Table 1. shows the relationship between fibre linear density and classification. [3]
Fibre count, dtex/f Fibre classification
> 7.0 coarse
7.0-2.4 medium fine
2.4-1.0 fine
1.0-0.3 micro
< 0.3
super-microfibres including nanofibres
when their cross-sectional
dimmentions are within a range of nm,
that is of