In medical product manufacturing, there is a particularly overlooked issue: micron-level organic contamination (mold release agent residues, machining oils, lubricants). These contaminants are invisible to the naked eye, yet they are highly likely to undermine downstream bonding, printing, and coating processes—posing nanoscale hidden risks.
Conventional approaches often come "at a cost"—strong acid corrosion can damage material surfaces, and organic solvent cleaning carries the risk of chemical residues. Plasma offers a smarter approach: dry, low-temperature, and non-destructive.
The principle is straightforward: gas is excited in a vacuum chamber or under atmospheric pressure to generate plasma containing abundant reactive species. These reactive species (such as oxygen radicals) precisely attack hydrocarbon-based organic contaminants on the surface, decomposing them into CO₂ and H₂O, which are then carried away by the gas flow.
The entire process is dry—no water, no chemical solvents. It is low-temperature throughout—processing temperature can be controlled below 60°C, preventing damage to heat-sensitive polymer materials. Precision reaches the nanoscale—acting only on a few molecular layers at the surface without affecting bulk material properties.
What Can This Technology Do?
① Luer Connectors
Luer connectors are typically injection-molded from materials such as polycarbonate (PC) or ABS. Mold release agents used during injection molding form an extremely thin organic film on the connector surface—invisible to the naked eye, yet this film dramatically compromises the bonding strength of subsequent UV adhesives, potentially leading to leakage or detachment at the connection point. Plasma cleaning precisely strips away this mold release agent contamination while simultaneously activating the PC surface, allowing the adhesive to wet and spread fully, significantly improving bond strength.
② Catheter Inner and Outer Wall Treatment
Whether PVC, PU, or silicone catheters, lubricants or dust are inevitably picked up during processing. Even more challenging are fluoropolymer catheters such as PTFE and FEP—inherently "non-stick," ink won't adhere, and adhesive won't bond. Conventional sodium etching solutions are both hazardous and polluting. Plasma cleaning handles both inner and outer surfaces: the inner wall is cleaned to ensure smooth fluid flow, while the outer wall is activated to ensure clear, durable scale printing—all through a dry process that does not damage the tubing.
③ Titanium Alloy Dental Implant Surfaces
The osseointegration capability of titanium alloy implants depends largely on surface condition. Organic residues such as cutting oils and polishing pastes left over from machining can clog surface micropores, forming a "barrier" that prevents effective bone cell attachment. Plasma cleaning thoroughly removes these nanoscale organic residues, exposing a clean, activated titanium surface and laying a solid foundation for subsequent hydrophilic or hydroxyapatite coatings.
In one sentence:Plasma cleaning does not rely on "dissolving"—it relies on "decomposing." No chemical residues, no material damage, no wastewater or exhaust gas—contaminants are converted into gas, extracted, and that's it.
If you are currently troubled by issues such as insufficient Luer connector bonding, unclear catheter printing, or inconsistent dental implant surface treatment, we welcome you to bring your materials to our booth for an on-site discussion. We will have a wide range of medical industry samples on hand for on-site plasma treatment effect comparisons.
