{"product_id":"otoplastics-3dresyn-oto-hf-hard-flexible-resin-shore-d70","title":"Otoplastics 3Dresyn OTO-HF – Hard \u0026 Flexible Resin (Shore D70)","description":"\u003cp\u003e\u003cstrong\u003eHard-flexible transparent photopolymer for otoplastics and hearing-related components (HF system)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eProduct description\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e3Dresyn OTO-HF\u003c\/strong\u003e is an advanced photopolymer engineered for the fabrication of clear, durable and hard-flexible ear molds and otoplastic components.\u003c\/p\u003e\n\u003cp\u003eThe material provides a unique balance between flexibility and rigidity, enabling comfortable yet mechanically resistant components with excellent optical clarity.\u003c\/p\u003e\n\u003cp\u003eThe formulation delivers high impact resistance and stable performance under repeated deformation, making it suitable for wearable audiology applications.\u003c\/p\u003e\n\u003cp\u003eIt is compatible with a wide range of SLA, DLP and LCD systems used in professional audiology and dental laboratories.\u003c\/p\u003e\n\n\u003ch3\u003eApplication framework\u003c\/h3\u003e\n\u003cp\u003eIntended for professional use in vat photopolymerization (\u003cstrong\u003eSLA, DLP and LCD\u003c\/strong\u003e) additive manufacturing for audiology and otoplastics workflows.\u003c\/p\u003e\n\u003cp\u003eFinal suitability of printed parts must be validated by the user according to the specific application, processing conditions and applicable regulatory requirements.\u003c\/p\u003e\n\n\u003ch3\u003eTypical applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTransparent ear molds and earmolds\u003c\/li\u003e\n\u003cli\u003eCustom ear shells and hearing aid housings\u003c\/li\u003e\n\u003cli\u003eFlexible-rigid in-ear components\u003c\/li\u003e\n\u003cli\u003eWearable devices requiring clarity, comfort and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaterial properties \u0026amp; test methods\u003c\/h3\u003e\n\n\u003ch4\u003eMechanical properties\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTensile strength:\u003c\/strong\u003e \u0026lt;20 MPa (ISO 527-1 \/ ISO 527-2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexural strength:\u003c\/strong\u003e \u0026lt;20 MPa (ISO 178)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYoung’s modulus:\u003c\/strong\u003e \u0026lt;500 MPa (ISO 527)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElongation at break:\u003c\/strong\u003e \u0026lt;40% (ISO 527)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShore hardness:\u003c\/strong\u003e D70 (ISO 868)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpact resistance (Notched Izod):\u003c\/strong\u003e \u0026lt;85 J\/m (ISO 180)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eThermal behaviour\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eStable performance under typical wearable conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003ePhysical properties\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical behaviour:\u003c\/strong\u003e water-clear, high transparency, non-yellowing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater absorption:\u003c\/strong\u003e ultra-low (ULWA, hydrophobic)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShrinkage:\u003c\/strong\u003e very low (typical)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution capability:\u003c\/strong\u003e very high (features below 20 µm depending on process)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensional stability:\u003c\/strong\u003e high\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStructure:\u003c\/strong\u003e isotropic (minimizes light scattering and diffraction)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFunctional performance characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBalanced hard-flexible behavior for comfort and durability\u003c\/li\u003e\n\u003cli\u003eHigh optical clarity for transparent components\u003c\/li\u003e\n\u003cli\u003eExcellent impact resistance and crack resistance\u003c\/li\u003e\n\u003cli\u003eHydrophobic behavior with very low water absorption\u003c\/li\u003e\n\u003cli\u003eSuitable for thin-walled and complex geometries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePrinting \u0026amp; processing guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrinting technologies:\u003c\/strong\u003e SLA, DLP and LCD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWavelength range:\u003c\/strong\u003e 385–405 nm\u003c\/li\u003e\n\u003cli\u003eCompatible with most commercial and professional systems when properly calibrated\u003c\/li\u003e\n\u003cli\u003eOptimized for high-resolution transparent parts\u003c\/li\u003e\n\u003cli\u003eFollow 3Dresyns IFU for exposure, washing and post-curing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWorkflow recommendations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse validated cleaning and post-curing workflows to preserve optical clarity\u003c\/li\u003e\n\u003cli\u003eOptimize parameters to minimize haze and maximize transparency\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBiocompatibility \u0026amp; quality framework\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBiocompatibility-related testing may be performed under controlled laboratory conditions\u003c\/li\u003e\n\u003cli\u003eEvaluation frameworks may include ISO 10993 methodologies\u003c\/li\u003e\n\u003cli\u003eManufacturing aligned with ISO 13485 quality management systems\u003c\/li\u003e\n\u003cli\u003eFinal biological performance depends on validated processing workflow\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant note\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis material contains reactive components that may cause skin and eye irritation prior to full polymerization.\u003c\/strong\u003e Printed otoplastic components must undergo validated cleaning and post-curing workflows to ensure maximum achievable polymer conversion and reduction of residual extractables, leachables and byproducts. Final device qualification and regulatory compliance remain the responsibility of the legal manufacturer.\u003c\/p\u003e\n\n\u003ch3\u003eTesting \u0026amp; processing disclaimer\u003c\/h3\u003e\n\u003cp\u003eMaterial properties are measured on printed and post-processed specimens and may vary depending on printer type, printing parameters, build orientation, post-curing conditions and workflow validation. Reported values are indicative and provided for reference only.\u003c\/p\u003e\n\n\u003ch3\u003eRegulatory \u0026amp; legal notice\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis material is supplied as a professional manufacturing material for audiology and otoplastics workflows and is not marketed as a finished medical device.\u003c\/strong\u003e The regulatory classification, conformity assessment and validation of any final device manufactured using this material remain the sole responsibility of the legal manufacturer in accordance with applicable regulations.\u003c\/p\u003e\n\n\u003ch3\u003eWhy choose 3Dresyn® OTO-HF\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHard-flexible balance for comfort and durability\u003c\/li\u003e\n\u003cli\u003eExcellent optical clarity and non-yellowing\u003c\/li\u003e\n\u003cli\u003eHigh impact resistance and dimensional stability\u003c\/li\u003e\n\u003cli\u003eVery low water absorption (ULWA)\u003c\/li\u003e\n\u003cli\u003eVery high resolution and low shrinkage\u003c\/li\u003e\n\u003cli\u003eCompatible with SLA\/DLP\/LCD systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv style=\"border: 1px solid rgba(0,0,0,.14); padding: 16px; border-radius: 18px; background: #fafafa; margin-top: 24px; margin-bottom: 12px;\"\u003e\n\u003cstrong\u003ePart of the 3Dresyns® Technical Documentation System\u003c\/strong\u003e\n\u003cp style=\"margin: .5rem 0 0 0;\"\u003eThis technical datasheet should be used together with the relevant processing, calibration, safety and workflow documentation available in the 3Dresyns® Resources section.\u003c\/p\u003e\n\u003cp style=\"margin: .6rem 0 0 0;\"\u003e\n\u003ca href=\"https:\/\/www.3dresyns.com\/pages\/resources\"\u003e Access the 3Dresyns® Technical Resources (IFU, calibration, CRT, post-processing and troubleshooting) \u003c\/a\u003e\n\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"font-size: 0.9em; opacity: 0.8;\"\u003eDocument reference: TDS-OTO-HF-EN | Version: 1.0 | Last updated: March 2026\u003c\/p\u003e","brand":"3Dresyns","offers":[{"title":"1000 grams","offer_id":50770998853966,"sku":"P20935","price":150.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0282\/5616\/files\/38_f8647ed1-8d0a-4157-b59e-1784ce5cd87b.png?v=1735300125","url":"https:\/\/www.3dresyns.com\/products\/otoplastics-3dresyn-oto-hf-hard-flexible-resin-shore-d70","provider":"3Dresyns","version":"1.0","type":"link"}