Spray Coating of Polyurethane Solution and Hydrophilic Coating
Ultrasonic spraying machine is used for the production and research and development of guide wire conduits, spraying polyurethane solution and hydrophilic coating
In the field of medical devices, the surface coating quality of guide wire catheters directly affects the safety and effectiveness of clinical use. Polyurethane solution and hydrophilic coating, as two key functional coatings, have extremely strict requirements for uniformity, adhesion, and biocompatibility. Traditional spraying technology is difficult to break through the bottleneck of accuracy and stability, while ultrasonic spraying machines, with their unique atomization principle, are becoming the core equipment for the production and research and development of guide wire conduits.
Traditional air pressure spraying relies on high-pressure airflow to atomize coatings, which can lead to problems such as uneven coating, droplet splashing, and material waste. The diameter of the guide wire catheter is mostly between 0.5-3 millimeters, and the complex curved structure increases the difficulty of coating control, often resulting in local thickening, pinholes, or sagging. The ultrasonic spraying machine generates mechanical vibrations of 20-100kHz through high-frequency vibration elements, allowing the coating to form micrometer sized uniform droplets at the nozzle without the need for high-pressure airflow assistance, fundamentally solving the shortcomings of traditional processes. The diameter of its atomized particles can be precisely controlled within 5-50 microns, and the coating thickness deviation can be stably controlled within ± 2 microns, fully meeting the high-precision requirements of medical devices.
Ultrasonic technology has shown significant advantages in the polyurethane solution spraying process. Polyurethane coating needs to have good wear resistance, flexibility, and biocompatibility for surface protection and lubrication transition of guide wire conduits. Traditional spraying can easily lead to the breakage of polyurethane molecular chains, affecting the performance of the coating. The low shear characteristics of ultrasonic spraying can maintain the stability of polyurethane solution, while achieving 360 ° circular spraying through a programmable motion system to ensure uniform coating coverage on the surface of the conduit. According to test data from a medical device company, the adhesion of polyurethane coatings sprayed with ultrasonic waves has been improved by 40%, and the wear resistance has increased from 5000 times to 12000 times, significantly improving the product’s service life.
The spraying quality of hydrophilic coating is directly related to the clinical operation safety of guide wire catheter. High quality hydrophilic coatings need to form a super lubricating surface in a moist environment to reduce insertion resistance. Ultrasonic spraying machine can achieve ultra-thin and uniform coating of hydrophilic coating materials, with coating thickness controlled between 1-5 microns, and avoiding the common edge accumulation phenomenon in traditional processes. By precisely controlling the spraying parameters, the gradient distribution of the coating can also be achieved to meet the functional requirements of different parts of the catheter. In addition, the material utilization rate of ultrasonic spraying can reach over 85%, which is 50% higher than traditional processes and effectively reduces production costs.
In actual production, the ultrasonic spraying system can integrate online detection and closed-loop control system, monitor the coating thickness and uniformity in real time, and adjust the spraying parameters in a timely manner. Its modular design facilitates integration with production lines and adapts to the mass production needs of different specifications of guide wire conduits. With the development of minimally invasive medical technology, the performance requirements for guide wire catheters are constantly increasing. Ultrasonic spraying technology, with its high precision, stability, and economy, will play a more important role in the field of medical device coatings, promoting the development of guide wire catheter products towards safer and more efficient directions.
About Cheersonic
Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.
Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.
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