How to prepare the surface coating process of non-woven fabrics?

Preparation of surface coatings for medical devices and consumables——Ultrasonic spraying

As people's requirements for the performance of medical devices and protective equipment increase, ultrasonic spraying technology can be used to develop non-woven protective products, medical testing consumables, etc. with high-efficiency antibacterial, antiviral, waterproof and breathable functions. Develop new solutions that can load drugs, evenly coat them on non-woven fabrics through ultrasonic spraying technology, and make medical products with drug sustained-release function to achieve long-term and stable drug release.

● Advantages of ultrasonic nozzles over traditional spray guns:

① Coating accuracy: Ultrasonic spraying solution particles are evenly distributed, which can make the coating uniformity reach more than 95%, and the formed coating is denser and has stronger adhesion. The spray impact of traditional spray guns is large, which can easily cause problems such as uneven coating thickness and poor adhesion.

② Material utilization rate: Ultrasonic spraying does not require air pressure to assist atomization, which greatly reduces liquid rebound and splashing. The raw material utilization rate is more than 4 times that of ordinary air spraying, up to more than 90%. In comparison, traditional spray guns waste materials seriously.

③ Thickness control accuracy: Ultrasonic nozzles have no pressure effect on liquids, and can control the flow rate of atomized sprayed coating liquid through high-precision syringes, which can achieve a thin coating of tens of nanometers. Traditional spray guns are difficult to accurately control the coating thickness.

④ Easy maintenance of nozzles: The atomized particles of ultrasonic nozzles are determined by the ultrasonic oscillation frequency, the aperture does not need to be very small, the risk of clogging is low, and there is no wear of moving parts. The nozzles of traditional spray guns have small calibers, are easy to clog, and need to be frequently cleaned and replaced.

⑤ Operational safety: The entire operation process is carried out in a closed system, which reduces contact with toxic substances and improves operational safety. Traditional spray guns may expose operators to more harmful substances.

Shanghai Yangmi convergent ultrasonic nozzle spraying non-woven fabrics can more accurately control the spraying area and spraying amount, save the use of paint and solvent to a greater extent, and reduce production costs. The atomization impact is small, and liquid splashing will not be caused. It can reduce the waste of raw materials and air pollution caused by reverse spraying, and also reduce the pollution to the working environment.