Polypropylene fibers are categorized into long fibers, short fibers, spunbonded nonwovens, meltblown nonwovens, etc.

Polypropylene long fibers are divided into ordinary long fibers and fine denier long fibers (single fiber fineness ≤ 2.2 dtex, suitable for producing garments, decorations, and some industrial long fiber products. Polypropylene fine denier long fibers have good luster, soft texture, excellent drape, and low density, making them ideal for the knitting industry. When blended with cotton, viscose, silk, spandex, and other materials to create products like cotton-over-pp and silk-over-pp, they are perfect for manufacturing sportswear, T-shirts, and more.

Polypropylene short fibers are mainly produced using porous, low-speed, continuous processes, known as short spinning technology. These fibers can be blended with cotton to create丙棉细布, bed linens, and blankets, as well as mixed with粘胶 for use in carpets. They are also used in pure and blended yarns for knitting, polypropylene carpets and rugs, and cigarette filters. The fiber thickness for hygiene products ranges from 1.5 to 2.5 dtex, while for ground fabrics, it is 5 to 10 dtex. The fiber length varies from 1.5 to 200.0 mm, depending on the application. Short fibers for concrete typically range from 1.5 to 200.0 mm, those for diapers are usually 40.0 mm, and for ground fabrics, 60.0 mm.

Spunbond nonwoven fabric, also known as filament nonwoven, is made by melting polypropylene material, then extruding, spinning, stretching, laying, and bonding it into shape. It boasts short processes, low costs, high production rates, excellent product performance, and wide applications. Polypropylene nonwoven fabric is extensively used in various fields of production and daily life, such as disposable medical supplies, one-time protective clothing, agricultural fabrics, furniture fabrics, and shoe lining.

The fibers produced by meltblown nonwoven technology are extremely fine (down to 0.25μm). Meltblown nonwovens have a large specific surface area, small pores, and a high porosity, which makes their application properties such as filtration, shielding, and oil absorption characteristics difficult to achieve with nonwovens produced by other separate processes. Meltblown nonwovens are widely used in healthcare, thermal insulation materials, and filtration materials, among other fields.