Another benefit is the time of glycerol separation.This is also faster and one of the reasons for it is that less methanol is been used, so glycerol separation is faster. Hand held ultrasonic welding machines, also known as portable ultrasonic welding machines, hand held ultrasonic welding machines, handheld welding machine, portable welding machine, ultrasonic spot welding, riveting machines, ultrasonic point welder, can be used for the butt welding of thermoplastics, welding head can also be replaced according to customer demand for riveting, spot welding, embedding, removal process, compared to other traditional crafts (such as adhesive, scald together or screw fastening, etc.), with high production efficiency and welding quality good, environmentally friendly and energy-saving advantages.