Ultrasonic sealing/welding
Using ultrasonic technology, the ultrasonic energy is transmitted to the welding area through the upper weldment. Due to the large acoustic resistance of the welding area, that is, the interface between the two weldings, local high temperature will be generated. In addition, due to the poor thermal conductivity of plastics, nylon, chemical fiber, non-woven fabrics, multilayer fabrics, gold fabrics and other materials, the heat cannot be dissipated in time and gathers in the welding area, causing the two contact surfaces to melt rapidly. After a certain pressure is applied, they will fuse. Into one.
When the ultrasonic stops working, let the pressure continue for a while for a while to make it solidify and shape, thus forming a solid molecular chain to achieve the purpose of welding. The welding strength can be close to the strength of the raw material. This is why many manufacturers use ultrasonic waves. The main reason for welding non-woven fabrics.
Ultrasonic welding has the advantages of fast, clean, safe, stable performance and high output, and it makes the wearer's ears comfortable, no pressure, and the filter cloth layer has a good filtering effect. It perfectly fits the face of Asian people and is widely applicable to individuals under the current epidemic. Protection, high-pollution red zone protection, and protective equipment for high-pollution industries such as construction and mining.
