3Dresyn PMMA-like vs rigid acrylic-like SLA / DLP / LCD 3D printing resins
Mechanical Resistance Comparison & Executive Summary
3Dresyn PMMA-like is a rigid engineering photopolymer designed for applications requiring hard surface behaviour, high stiffness, elevated thermal resistance and a more acrylic-like mechanical profile than softer or tougher engineering resins. It is positioned for parts where rigidity, hardness and dimensional retention matter more than high ductility.
With flexural strength of 80–100 MPa, Young’s modulus of 2.7–3.3 GPa, elongation below 6% and Shore D 85–90, PMMA-like sits in the class of hard, rigid photopolymers intended for dimensionally stable technical parts and aesthetic or structural components requiring a more “acrylic-like” response.
Choose PMMA-like when you need rigidity, hardness and thermal stability, rather than high impact absorption or high deformation tolerance.
Data Table — Typical Properties (post-cure; internal data and competitor TDS)
| Resin | Flexural strength | Elongation | Young’s modulus | Noted traits |
|---|---|---|---|---|
| 3Dresyn PMMA-like | 80–100 MPa | <6% | 2.7–3.3 GPa | Hard and rigid; Shore D 85–90; Tg >130 °C; acrylic-like engineering response. |
| Formlabs Grey Pro | ~121 MPa / depends on strain definition | Low-to-moderate | ~2.2 GPa class | Closed ecosystem; general engineering positioning; lower thermal acrylic-like positioning. |
| Formlabs Rigid 10K | 126–158 MPa | Very low | Very high | Closed ecosystem; ultra-stiff, composite-like, more brittle. |
| Liqcreate Strong-X | ~134–135 MPa | Low | High stiffness | Strength-focused; open systems; less acrylic-style positioning. |
| High-rigidity engineering families | Varies | Varies | Medium-to-high | Often stronger or stiffer, but not always optimized for PMMA-like balance of hardness and thermal behaviour. |
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Comparability note: Rigid resin data often mix maximum flexural strength, stress at fixed strain and varying post-cure conditions. Comparisons should always normalize test method, strain definition and post-processing route.
Where 3Dresyn PMMA-like Wins
1) Hard and rigid acrylic-like engineering response
- PMMA-like is positioned for users who want hard-surface, rigid behaviour with higher thermal stability than many general engineering resins.
2) Better fit for dimensionally stable, high-hardness technical parts
- Suitable for rigid housings, hard covers, aesthetic technical parts, structural inserts and applications where surface hardness and stiffness matter more than impact softness.
3) Strong thermal positioning
- With Tg above 130 °C, PMMA-like occupies a strong place in the collection for temperature-resistant rigid parts.
Application Guidance
- Choose 3Dresyn PMMA-like for: rigid covers, hard structural parts, dimensional inserts, aesthetic engineering parts and high-hardness applications.
- Choose a tougher material if impact absorption or flexural ductility dominates the application.
- Choose a composite-like rigid resin if the only goal is maximum stiffness and brittleness can be tolerated.
Processing Notes (Quick Start)
- Compatible with open SLA, DLP and LCD systems in the 385–405 nm range.
- Use validated post-cure to reach target rigidity and thermal response.
- Not intended for high-deformation use cases.
Normalization & Caveats
- PMMA-like positioning reflects engineering behaviour analogy, not direct equivalence to molded PMMA.
- Part brittleness and impact tolerance depend strongly on geometry and process control.
- Data must be interpreted in the context of final post-curing conditions.
References
- 3Dresyn PMMA-like internal product data
- Formlabs Grey Pro TDS
- Formlabs Rigid 10K TDS
- Liqcreate Strong-X TDS
- Relevant rigid engineering resin documentation