In textile industry polyester rope welding is a big need in production lines. During fabric production, the ropes can be cut and stops the machine so the polyester rope should be connected to each other as soon as possible. This connection should be very close to the original rope shape so ultrasonic sealing plays a big role here. Ultrasonic spot welder or hand type model can be used to seal the two edges of polyester rope. This ultrasonic welding process is nearşy 1 second so it is very fast sealing method. Ultrasonic welding needs no chemicals.