Sponge-bond (SB) non-woven fabric is manufactured by dissolving thermoplastic resin (polypropylene, polyester, polyethylene, etc.) which is raw material at high temperatures and releasing it in filament form through a metal nozzle, then distributing it uniformly and aggregating it on conveyor belts that move continuously. The manufacturing process is relatively simple and the final product from the raw material resin is manufactured through one process.
SMS non-woven fabric is made in the same way as the previously discussed sponge non-woven fabric, where the metal nozzle being radiated is divided into primary and secondary and tertiary sections, and after releasing filaments from the primary nozzle and passing through certain segments, fine fibers less than 10 μm from the secondary nozzle, and again by emitting filaments such as the primary nozzle from the secondary nozzle. Since it is usually made up of microfiber, it has the effect of collecting fine dust, and filter lumps are used for masks and others.
Such SB or SMS non-woven fabrics are good for air permeability as protective clothing fabrics, but they have limitations in excluding fine dust and liquid materials. To compensate for these shortcomings, SF non-woven fabrics are laminated with functional adhesives on sponge-bond non-woven fabric, which is breathable and releases sweat-like moisture out of the room to ensure the safety of the wearer of the suit.
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