**Author details**

**Figure 15.** Normalized between‐area‐density variance curve – compound irregularity

**0 5 10 15 20 25 30**

**Figure 16.** Normalized between‐area‐density variance coefficient curve – compound irregularity.

Nonwoven industries are fiber-based industries. Based on their physical and mechanical properties, the nonwoven applications are increasing inducing a strong growth of the non‐

**Figure 16.** Normalized between-area-density variance coefficient curve – compound irregularity.

**0 5 10 15 20 25 30**

**Web length (m)**

**Figure 15.** Normalized between-area-density variance curve – compound irregularity

**Web length (m)**

1= 4 m 2= 0.5 m =0.4 2=0.6

> 1= 4 m 2= 0.4 m =0.4 2=0.6

.0 04 *m*

.0 04 *m*

**0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1**

> **0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1**

**6. Conclusion**

**A)**

 **(A)**

76 Non-woven Fabrics

Jean-Yves Drean and Omar Harzallah\*

\*Address all correspondence to: o.harzallah@uha.fr

Université de Haute Alsace – Laboratoire de Physique et Mécanique Textiles, Mulhouse, France
