1.  Rapid, Mold-Free 3D Printing
We utilize a proprietary cryogenic extrusion process that injects polymer solutions through a micro-pore array onto a frozen backing film. This completely eliminates the cumbersome lifecycle of traditional molds (manufacturing, sterilization, and disposal), enabling rapid and scalable fabrication.

      2.  Customized Geometries for Enhanced Bioavailability

     Traditional molds often cause breakage when demolding long needles (>0.8mm) needed for drug delivery. Our mold-free process removes this constraint, allowing us to print unique geometries like a narrowed waist and enlarged tip, which significantly enhances transdermal bioavailability.

      3.  Chemical-Free Physical Crosslinking

      To achieve a swellable-but-insoluble matrix, traditional methods rely on reactive chemical crosslinkers that carry toxicity risks and potential drug interactions. We eliminate this hazard through a simple freeze-thaw process that forms internal "micro-crystalline domains." This ensures zero toxic residue and no drug-crosslinker reactions, making it perfectly safe for frequent dosing (e.g., mealtime insulin, daily PTH).

        4.  Sustained Channels for Minimally Invasive Monitoring

      Because our microneedles swell rather than dissolve in dermal fluids, they maintain open micro-channels for extended periods. This enables continuous, minimally invasive extraction of endocrine fluids for precise biomarker monitoring, such as accurate blood glucose tracking.

 Home-made extrusion-freezing 3D printing system          Working mechanism of extrusion-freezing 3D printing