Step-by-Step Spunbond Manufacturing Process
- Polymer Dosing & Melting: High-MFI virgin Polypropylene resin granules and color masterbatches are fed into the extruder hopper and melted at 200°C–240°C.
- Filament Spinning: The molten polymer is pumped through precision spinneret dies containing thousands of micro-holes.
- Quenching & Attenuation: High-velocity cold air streams cool and stretch the filaments, orienting the molecular structure for maximum tensile strength.
- Web Laying: Filaments are deposited onto a continuous porous screen belt to form a uniform web.
- Thermal Bonding (Calendering): Heated embossed rollers apply pressure and temperature to fuse the filaments at contact points.
- Slitting & Winding: Automated slitters cut the master web into custom roll widths and wind them under constant tension control.