Sonikel Ultrasonics, designs and manufactures Ultrasonic Welding Machine for nylon Velcro strap application made of PP and PVC thermoplastics. In textile industry Velcro straps are used and welding, sealing should have some figure to supply a high strength sealing. This application cannot be performed by heating or gluing by chemicals. The fastest and the most economical way is ultrasonic welding technology. Thermoplastic parts can be welded by ultrasonic technology. Supporting by Industry 4.0 theory, ultrasonic welder designed by Sonikel, lets mass production and automation. There will be no need to use any chemicals for sealing plastic parts to each other. Ultrasonic welding technology will be enough.