Nonwovens are flat or tufted porous sheet or web structures bonded together by entangling fiber or filaments (and by perforating films) mechanically, thermally or chemically. Depending on the material structure, these fabrics can provide good filtration and breathability.

Generally speaking, these fabrics can be made from a combination of recycled materials and oil-based materials. Spunbond polypropylene is a common example of this kind of fabric.

The SMMSS Spunmelt Nonwoven Machine is a new kind of production line combining spunbond and melt blowing technologies. It is an economical, energy-saving and reliable production line that is suitable for producing a variety of nonwoven fabrics with different widths.

The main components of the SMS machine are a screw, feed distribution channel and a spinneret. The screw preheats the pellets of polymer in the feed zone and conveys them to the transition zone where they are compressed and melted by the screw action.

Next, the screw conveys the melted polymer pellets to the spinneret. The screw is designed with a number of nozzle holes or slits. Air as hot as melting temperature emerges from these nozzles and draws the fibers along. As the fibers cross the nozzles, they self-bond at their crossover points, due to their inherent tackiness.

The nozzles also have air slots on both sides to expel drawing gas ‘1’ (primary air) and room air ‘2’. The resulting air-saturated polymer is drawn through the spinneret and rolled to form a continuous filament. The resulting continuous filament is then blown into a die or spin net and collected to produce a finished nonwoven product.