Medical Device Packaging Engineering

Overview

When a medical device goes into production, the product itself is only half the job. Every device needs packaging that protects it during sterilization, transport, and storage while giving the surgical team fast, reliable access in the operating room. For implantable and sterile-use devices, the packaging is not an afterthought. It is a regulated, engineered component of the product system.

This project covered the complete packaging development for multiple medical device kits, including catheter systems and drainage kits. The scope included packaging geometry design, material selection, wall thickness optimization, and the design of thermoforming molds for series production.

The Challenge

Each kit contains multiple components with different geometries, materials, and fragility levels. The packaging had to secure every item in a fixed position during handling and shipping, maintain sterile barrier integrity through EtO or gamma sterilization cycles, and allow the surgical team to identify and access components quickly during a procedure.

The packaging also needed to be produced at scale using thermoforming, which meant every design decision had to account for material behavior during forming, draft angles for mold release, wall thinning at corners, and dimensional consistency across production batches.

Our Approach

Material Selection

We selected both APET (amorphous polyethylene terephthalate) and PETG (glycol-modified PET) depending on the specific packaging application. APET provides excellent optical clarity for product visibility and strong chemical resistance for sterilization compatibility. PETG offers superior impact resistance and flexibility during thermoforming, making it ideal for deeper draws and more complex tray geometries. Both materials meet the biocompatibility and sterilization requirements for medical device packaging.

Packaging Geometry Design

Each packaging variant was designed around the specific device kit it would contain. The catheter kit packaging (195mm x 420mm) uses a shallow-draw tray with a matched cover, optimized for flat catheter assemblies and small accessory components. The drainage kit packaging (255mm x 555mm) required a deeper tray geometry to accommodate the drainage column and tubing assembly, with internal features that hold each component in position without additional fixturing.

Wall Thickness Optimization

Wall thickness was engineered at 0.50mm for tray bodies and 0.70mm for cover sections. These values were determined by balancing structural rigidity against material usage, thermoforming feasibility, and seal integrity requirements. At these thicknesses, the packaging maintains enough stiffness to protect contents during stacking and transport while remaining thin enough for clean peeling at the sterile barrier seal.

Thermoforming Mold Design

We designed the production molds for each packaging variant, accounting for draft angles that allow clean part release without deformation, corner radii (R5.00mm and R9.00mm) that prevent excessive wall thinning during forming, cooling channel layout for uniform temperature distribution across the mold surface, and ejection system geometry that avoids marking or warping the formed part. Each mold was designed for integration with the manufacturer's existing thermoforming production line.

The Result

A complete packaging system covering multiple medical device kits, with production-ready thermoforming mold designs and fully dimensioned documentation. Every packaging variant was validated for sterilization compatibility, component security, and manufacturing consistency.

This project demonstrates a critical capability: when we develop a product, the packaging is engineered as part of the same system. Clients receive not just a designed device, but a complete, production-ready product including its packaging, molds, and manufacturing documentation.

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