3Dresyn PP-like Polypropylene Semi-Flexible Engineering Resin

3Dresyn® PP-like is a high-performance photopolymer engineered to replicate the mechanical behaviour of polypropylene, offering a balance between flexibility, toughness and low density mechanical response. The material exhibits semi-flexible behaviour with good elongation and impact resistance, making it suitable for functional components requiring durability and repeated deformation. It provides clear to light transparent orange finishes depending on formulation and post-processing conditions, while maintaining ultra low water absorption. It is available in HV (higher mechanical performance) and LV (lower viscosity) versions for compatibility with SLA, DLP and LCD printing systems.

Intended for professional use in vat photopolymerization (SLA, DLP and LCD) additive manufacturing.
Final suitability of printed parts must be validated by the user according to the specific application, processing conditions and applicable regulatory requirements.

• Flexible functional parts and living hinges
• Containers, housings and fluid-contact components
• Impact-resistant lightweight components
• Snap-fit parts and repeated-use mechanical elements
• Biomedical and food-contact oriented applications (subject to validation)

• Tensile strength: <30 MPa (typical) (ISO 527-1 / ISO 527-2)
• Flexural strength (break): <30 MPa (typical) (ISO 178)
• Young’s modulus: <1000 MPa (typical) (ISO 527-1 / ISO 527-2)
• Elongation at break: <80% (typical) (ISO 527-1 / ISO 527-2)
• Impact resistance (Notched Izod): <85 J/m (typical) (ISO 180)
• Shore hardness: D70 (ISO 868)

• Density: ~1.0–1.1 g/cm³ (typical) (ISO 1675)
• Water absorption: ultra low (ULWA, hydrophobic behaviour) (ISO 62)
• Printing shrinkage: no measurable dimensional shrinkage after calibration under validated processing conditions
• Color: clear to light transparent orange depending on formulation and post-processing
• Bio-based content: >20% from renewable sources

• Glass transition temperature (Tg): <25 °C (typical) (ISO 11357-2)

• Printing technologies: SLA, DLP and LCD
• Wavelength range: 385–405 nm
• Compatible with open-parameter vat photopolymerization systems
• LV (~<10,000 cP @ 25 °C): optimized for unheated printers or ambient temperatures below ~25 °C
• HV (~higher viscosity): optimized for heated systems and improved mechanical performance
• Follow 3Dresyns IFU for exposure, washing and post-curing to achieve target properties

• Biocompatible formulation platform
• Biocompatibility must be evaluated on the final printed and post-processed device according to ISO 10993
• Manufacturing aligned with ISO 13485 quality management systems
• Organo-tin free formulation

Material properties are measured on printed and post-processed specimens and may vary depending on the selected material version, printer type, printing parameters, build orientation, post-curing conditions and test specimen preparation. Reported values are indicative and provided for reference only.

• PP-like balance of flexibility, toughness and durability
• Good elongation with resistance to repeated deformation
• High impact resistance for lightweight functional parts
• Ultra low water absorption (ULWA) and hydrophobic behaviour
• Bio-based content from renewable sources
• Very low shrinkage and good dimensional stability
• Available in LV and HV versions for broader processing flexibility
• Open-system compatibility (385–405 nm) across SLA/DLP/LCD workflows

For polypropylene-like 3D printing applications, compare nearby engineering resin routes when the target balance shifts between semi-flexible, flexible and elastic mechanical behaviour.

• Engineering & Functional 3D Resins
• 3Dresyn HDPE-like
• 3Dresyn TPU-like

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)