Nonwoven Fabric is the primary raw material for the top layer of diapers and sanitary pads. It is mainly composed of polypropylene, composite fibers, and polyester. The production processes include spunbond non-woven fabric, hot air non-woven fabric, thermal calendaring non-woven fabric, hydroentangled non-woven fabric, and meltblown non-woven fabric.

In terms of hydrophilicity, non-woven fabric can be divided into hydrophilic and hydrophobic types. Hydrophilic nonwoven fabric requires the addition of a hydrophilic agent to achieve absorbency and is often used in the top layer and outer cover of diapers. Hydrophobic nonwoven fabric is used in the leak-proof leg cuffs, backsheet, and backsheet film of diapers.