Non woven fabrics and spunbonded fabrics are subordinate. Non woven fabric is a kind of fabric formed without spinning and weaving.

Characteristics and applications of non-woven fabrics. Durability, disposable. Insulated, conductive. Softness, rigidity. Fineness and expansibility. Isotropic, anisotropic.

The fibers used in the production of non-woven fabrics are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose fiber, acrylic fiber, polyethylene (HDPE), and polyvinyl chloride (PVC).

Structure of Nonwoven Materials In general, it is required that the filter material can block or adsorb particles in structure and ensure the smooth passage of a certain amount of gas. The filtration effect of the filter material is realized through its internal pore channels, so the pore size and