2. Difference between nonwovens and woven or knitted fabrics: a matter of scale
2.1 Micro scale: the fiber or filament
The basic unit of a fibrous structure is the fiber or filament. The distinction is based on the length of the unit. The term “filament” refers to a linear element of very great length. These are essentially objects produced by spinning petroleum-based polymers. The term “fiber,” on the other hand, is used to refer to objects whose length does not exceed a few centimeters or tens of centimeters. Fibers and filaments do not necessarily have a circular cross-section; whether they are natural fibers or synthetic filaments, various shapes can be observed (Figure
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Difference between nonwovens and woven or knitted fabrics: a matter of scale
Porosity in a Textile
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