Instead of sewing the material together, it can be joined by welding. Welding can be done with hot air, heat wedge or ultrasound. Ultrasonic welding or gluing with ultrasound provides a strong and very durable joint and is especially suitable when you want to avoid holes after a sewing machine needle. Industries where welding of materials are used include awning seam, blind manufacturing, sails, chapels, filters and non-woven materials. Welding is also used to seal seams with tape on waterproof and water resistant materials, such as rainwear, outerwear, tents, etc.

Joining materials by using ultrasound is a fairly new technique. Ultrasonic welding or gluing with ultrasound provides a strong and very durable joint and is especially suitable for products where you want to avoid holes after a sewing machine needle.