Ultrasonic welding technology makes occupational health better. Especially fabrics welding with heated – hot - wire makes smoke and small particules into the working environment. This affects occupational health negatively. Sonikel Ultrasonics, provides an effective way to weld the fabrics by ultrasonic technology. Ultrasound welding method does not give any smoke or any particules into the environment so ultrasonic cutting is a green technology. This simplifies a lot of process in textile industry. When the fabrics are cut and sealed by hot wire, the edges become hard so when they touch to the person skin, the feeling is not good. If the fabrics are cut by ultrasonic, the edges are very soft and do not disturb the skin. For flexbile textiles, in underwear sector, it is preferred to use ultrasonic welding technology. The welding time is very short, under 1 sec.