Spunbonded nonwovens production lines are used to manufacture nonwoven fabrics from synthetic fibers. China spunbonded nonwovens production line supplier give the basic steps involved in the production process:
Polymer extrusion
The first step in the process is to extrude the polymer, typically polypropylene, through a spinneret. The spinneret has numerous small holes, which are used to extrude the polymer into filaments.
Filament spinning
The extruded polymer filaments are then drawn and stretched to orient the molecules and improve the strength and durability of the fibers.
Web formation
The oriented filaments are then laid down onto a moving conveyor belt in a random or patterned manner, creating a web of fibers.
Bonding
The fibers are then bonded together using heat, pressure, or chemical bonding to form a nonwoven fabric. Spunbonded nonwovens are typically bonded using heat, where the fibers are passed through a calendering machine that applies heat and pressure to the fibers to fuse them together.
Finishing
The nonwoven fabric is then finished with various processes to improve its properties, such as adding a coating or lamination to provide additional strength or barrier properties.
Cutting and winding
The finished nonwoven fabric is then cut and wound onto rolls for storage and transportation.
During the production process, various quality control measures are taken to ensure that the nonwoven fabric meets the required specifications, such as weight, thickness, and strength. These measures may include online monitoring of the production process and laboratory testing of the finished product.