Ultrasonic spraying adopts the spraying method of ultrasonic atomization technology, which is fundamentally different from traditional single-fluid or two-fluid spraying. Ultrasonic spraying adopts atomization device, which will be different in usage effect. What are the advantages?
1. High coating uniformity
The uniformity of liquid particle distribution after atomization by the ultrasonic nozzle is significantly higher than that of the two-fluid nozzle, which is commonly known as the air spray gun, so the uniformity of the coating after spraying by the ultrasonic nozzle has been significantly improved. Usually, the coating uniformity of ultrasonic spraying can reach more than 95%.
2. High utilization rate of raw materials and less splash
Since ultrasonic spraying is liquid atomization by ultrasonic oscillation, the process of coating is atomized does not require any gas, that is, the atomization process does not require pressure, and only a very low carrier gas pressure is applied after atomization to transport the liquid mist, so The liquid rebound and splash caused by the high-pressure air of the two-fluid spraying are greatly reduced, thereby greatly improving the utilization rate of the paint. The raw material utilization rate of ultrasonic spraying is more than 4 times that of ordinary air spraying, and the utilization rate can reach more than 90%.
3. High precision of coating thickness control
The main factor that affects the thickness accuracy of the coating is the spray flow of the coating, that is, the amount of material loaded on the substrate per unit time. The ultrasonic nozzle does not have any pressure effect on the liquid, so the flow rate of the sprayed paint liquid can be completely controlled by the high-precision metering pump, thus realizing the high-precision spraying flow control. For example, a high-precision syringe pump, its flow control accuracy can reach the level of picoliters per second, and the micro-channel design of the ultrasonic nozzle can also achieve the overall control accuracy of nanoliters per second.
4. The thickness of the coating is thin, which can reach tens of nanometers
Since the spray volume of the ultrasonic nozzle can achieve a very low and stable flow rate (0.001ml/min), it can achieve a very small amount of loading on the substrate, thereby achieving a very thin dry film. For some nanomaterials, the dry film thickness can be as low as tens of nanometers. It can be used to prepare glass films such as transparent conductive films, antireflection and antireflection films, heat insulation films, hydrophilic and hydrophobic films, etc.
5. No blockage of nozzles and low maintenance costs
Because the ultrasonic nozzle realizes the liquid atomization through ultrasonic oscillation, and the atomized particles are determined by the ultrasonic oscillation frequency, so it is different from the two-fluid nozzle. risk of nozzle clogging.
