UV

Описание: Why do piezoelectric UV inkjet printers have an advantage over pharmaceutical aluminum foil bags?
Pharmaceutical aluminum foil bags are not ordinary plastic bags; they typically have a multi-layered composite structure. Common structures include:
PET/AL/PE
OPA/AL/PE
PET/AL/CPP Each layer has a specific function:
Outer layer: PET/OPA, function: strength, flatness, printability
Middle layer: AL aluminum foil, function: oxygen barrier, moisture protection, light protection
Inner layer: PE/CPP, function: heat sealing, contamination prevention
The layer that truly affects the inkjet printing effect is the "aluminum foil layer." Pharmaceutical packaging must be moisture-proof, oxygen-proof, light-proof, and contamination-proof; therefore, the aluminum foil layer is essential.
In actual medical settings, we often see:
1. Blurred characters, rough edges
2. Blurred QR code edges
3. Ink trailing
4. Code fading after friction
5. Disappearance after alcohol wiping
Why is a UV piezoelectric inkjet printer "naturally suitable"?
The key is:
UV piezoelectric inkjet printing uses ultraviolet light to instantly cure, forming a solid ink film on the surface. Therefore, the clarity, scratch resistance, and QR code readability are more stable on aluminum foil bags.
UV ink does not rely on absorption or evaporation; instead, it forms a highly adhesive cross-linked cured layer on the aluminum foil surface.
Furthermore, the piezoelectric printhead has precise droplet control and stable output over a long period, consistently ejecting 7-14pl micro-droplets. The printed edges are free of ink splatter, and the lines are smooth—this is crucial for clear medical QR codes.
Currently, the pharmaceutical industry is no longer focused on whether printing is possible, but rather on:
1. Long-term stability
2. Auditability
3. Scannable identification
4. Regulatory traceability
These are precisely the strengths of UV piezoelectric inkjet printers!👏