Smart Wearables & Biosensors
Tolerance Typically ISO 2768-m. Tighter tolerances of +/- 0.05 mm are achievable on specific features but will increase machining time and cost. · min feature Min Wall Thickness: ~1.0 mm; Min Hole Diameter: ~1.0 mm (highly dependent on material and depth-to-diameter ratio).
| Physical Properties | |
| Density | 1.21 |
|---|---|
| Tensile Strength | 45.0 |
| Max Service Temp | 85.0 |
| Hardness | 95A |
| Standard Tolerance | Typically ISO 2768-m. Tighter tolerances of +/- 0.05 mm are achievable on specific features but will increase machining time and cost. |
| Manufacturing Limits | |
| Equipment Specs | Clamping Force: 1500 kN. Rotary Table Diameter: 1200 mm. Injection Unit (example size 400): Max Shot Volume (PS) 139 cm³, Screw Diameter 40 mm. Max Mold Weight per Station: ~350 kg. Ejector Stroke: 150 mm. Control System: SELOGICA. |
| Min Feature Size | Min Wall Thickness: ~1.0 mm; Min Hole Diameter: ~1.0 mm (highly dependent on material and depth-to-diameter ratio). |
| Precision Grade | Typical Part Tolerance: ISO 2768-m (general), but capable of achieving ±0.02mm on critical features under controlled conditions. Shot-to-shot weight repeatability: <0.1%. Conforms to molding precision grade IT7-IT8. |
| Commercial | |
| Factory Advantage | The high hygroscopic nature and shear sensitivity of biocompatible polyurethanes like Elastollan 1195A present significant molding challenges. Uncontrolled processing leads to hydrolysis, causing splay marks and compromising structural integrity, which is unacceptable for IP68-rated wearables. Our approach leverages the Arburg Allrounder A 1500T's servo-electric drives and advanced SELOGICA control system. This combination provides the exceptional process repeatability needed to manage the narrow processing window, ensuring consistent melt viscosity and preventing material degradation. For two-shot applications, the machine's vertical rotary table is a game-changer. It facilitates a single, highly controlled overmolding cycle, achieving a superior chemical bond between the TPU and a rigid substrate. This net-shape process, perfected at MechanoFab, eliminates delamination risks and meets stringent ISO 10993 and ISO 13485 requirements without secondary operations. |
| Target Volume | Optimized for 250 - 25,000 units |