Ultrasonic spraying technology has shown unique advantages in the preparation of coatings for medical surgical blades, instruments and staples. Its high precision, uniformity and material adaptability make it the core process of biocompatible coatings, lubricating coatings and functional coatings.
Preparation of surgical blade coatings：
1. Lubricating and anti-adhesive coatings
2. Antibacterial and biocompatible coatings
The PTFE (polytetrafluoroethylene) coating developed for surgical blades deposits PTFE emulsion evenly on the blade edge through ultrasonic atomization to form an ultra-thin lubricating layer of 5-20μm. The friction coefficient of this coating is reduced, which significantly reduces the drag force during tissue cutting and reduces the risk of postoperative inflammation.
Technical advantages: Ultrasonic spraying can accurately control the coating thickness to avoid blade blunting, and at the same time achieve selective coating of the blade edge through airflow guidance to ensure a balance between sharpness and lubricity.
Preparation of staple coating:
1. Degradable magnesium alloy staple coating
2. Drug sustained-release staple coating
Process optimization: Supercritical CO₂-assisted spraying technology is used to reduce the porosity by 80%, ensure the sealing of the PLLA layer, and delay the corrosion rate of the magnesium matrix (initial degradation rate < 10%/14 days). Ultrasonic spraying is used to achieve uniform drug loading. In vitro release experiments show that the drug sustained-release period is up to 28 days, and the smooth muscle cell proliferation rate is inhibited by > 80%.
Ultrasonic spraying technology is reshaping the technical landscape of medical coating preparation through its three core capabilities of precise atomization, uniform deposition, and material adaptability. In the field of surgical blades, it achieves a perfect balance between lubrication and sharpness; in the field of surgical instruments, it solves the problem of no-dead-angle protection of complex structures; in the field of staples, it promotes the clinical transformation of degradable and drug-release technologies. Despite the challenges of efficiency and cost, its irreplaceability in high-end medical devices has been verified.
In the future, with the cross-integration of multiple disciplines (such as materials science and intelligent control), ultrasonic spraying is expected to become the gold standard of medical coating technology, providing key support for precision medicine.
