Principle of ultrasonic sealing:
Under the action of ultrasonic vibration energy, the welding line first melts, and the melt spreads to the upper and lower surfaces of the welded products under the action of pressure. When the ultrasonic wave stops, the temperature drops and the molten plastic solidifies, thus connecting the welded products.
knowledge extension:
ultrasonic encapsulation is to transmit high-frequency vibration waves to the surfaces of two objects to be welded, and under pressure, the surfaces of the two objects rub against each other to form fusion between molecular layers.