3Dresyn IJ OTO-UHF Bio – Ultra-Hard & Flexible Inkjet Resin

3Dresyn IJ OTO UHF BIO is an ultra hard and flexible bio-based photopolymer formulation designed for high-performance inkjet 3D printing applications in otoplastics and advanced engineering workflows. The material is engineered to deliver a unique combination of high hardness and controlled flexibility, enabling the fabrication of durable components with improved impact resistance and reduced brittleness compared to ultra rigid systems.

This formulation provides a balance between stiffness and flexibility, supporting the production of parts with high dimensional stability, structural integrity and enhanced resistance to cracking under mechanical stress.

Designed for use in commercial and professional inkjet 3D printing systems within otoplastics, industrial and product development environments requiring durable, semi-rigid and high-strength components.

• Otoplastic shells with improved impact resistance
• Semi-rigid hearing device components
• Functional parts requiring stiffness with controlled flexibility
• Mechanical housings with reduced brittleness
• High-resolution technical components

• Tensile strength: >30 MPa (ISO 527)
• Flexural strength: >40 MPa (ISO 178)
• Young’s modulus: 1000–2000 MPa (ISO 527)
• Elongation at break: 5–15% (ISO 527)
• Shore hardness: D80–85 (ISO 868)

• Density: 0.90–1.20 g/cm³, depending on formulation and, where applicable, selected version (ISO 1675)
• Printing shrinkage: no measurable dimensional shrinkage after calibration under validated processing conditions
• Resolution capability: very high
• Color stability: non-settling of color
• Inkjet viscosity: <20 mPas at 70°C and <15 mPas at 80°C (ISO 3219)

• Ultra hard with controlled flexible behavior
• High strength with improved impact resistance
• Reduced brittleness compared to ultra rigid materials
• Excellent dimensional stability
• Durable performance under mechanical stress
• Very high resolution for technical geometries

• Printing technology: inkjet 3D printing
• Compatible with most commercial and professional inkjet 3D printers
• Optimized viscosity for reliable jetting performance
• Supports stable processing and high-resolution output

• Bio-based formulation
• Organo-tin free formulation
• Biocompatible formulation for otoplastic workflows (final validation required)

Material properties are measured under controlled laboratory conditions and may vary depending on printer model, jetting temperature, printing conditions, build geometry and post-processing workflow.

This material is supplied as a professional manufacturing material for engineering and otoplastic workflows. It is not marketed as a finished medical device. Final part performance and suitability must be validated by the user according to the intended application and regulatory requirements.

This technical datasheet should be used together with the relevant processing, calibration, safety and workflow documentation available in the 3Dresyns® Resources section.

Access the 3Dresyns® Technical Resources (IFU, calibration, CRT, post-processing and troubleshooting)