There are several types of non-woven fabrics used in diaper production: 1. Spunbond Non-woven Fabric: This is made by spinning and bonding polypropylene fibers together. It is durable, strong, and breathable. 2. Meltblown Non-woven Fabric: This is made by melting and extruding polypropylene fibers to create fine fibers that are then laid down and bonded to form the fabric. It is soft, absorbent, and good at filtering. 3. SMS Non-woven Fabric: This is made by combining spunbond and meltblown fabrics together to create a layered fabric that is soft, strong, and has good barrier properties. 4. Hot Air Non-woven Fabric: This is made by using hot air to melt and bond fibers together. It is often used as a top layer in diapers to provide a soft, dry feel. 5. Wetlaid Non-woven Fabric: This is made by using a wet process to blend and form fibers together. It is often used in absorbent cores of diapers to provide excellent liquid retention.