Non-woven fabrics are made from polymer compounds through high-temperature melting and a special molding process. They are characterized by being structureless, non-woven, non-directional, and having a uniform cross-section. This is specifically demonstrated in the following aspects:
1. Structureless: Non-woven fabrics lack linear density and linear form, lack a regular mesh structure, and possess a loose three-dimensional structure.
2. Non-Woven: Non-woven fabrics do not require traditional processes such as spinning and weaving, eliminating significant production steps and energy consumption.
3. Non-Directional: Unlike textiles, non-woven fabrics exhibit distinct directional properties; their physical properties are essentially the same in all directions.
4. Uniform Cross-Section: The cross-section of non-woven materials is generally circular or nearly circular.
