3Dresyn PET-like vs balanced packaging and engineering SLA / DLP / LCD 3D printing resins
Mechanical Resistance Comparison & Executive Summary
3Dresyn PET-like is a balanced engineering photopolymer designed to approximate a PET-like functional response in additive manufacturing. It is positioned for applications requiring moderate stiffness, useful elongation, stable technical behaviour and a balanced compromise between rigid and flexible performance.
With flexural strength below 50 MPa, elongation below 40–60%, Young’s modulus below 1000 MPa and Shore D 60–70, PET-like occupies a useful middle ground between more rigid engineering families and softer ductile or flexible materials.
Choose PET-like when a part must remain balanced, practical and moderately deformable, without moving to the extremes of rigid structural resins or very flexible systems.
Data Table — Typical Properties (post-cure; internal data and competitor TDS)
| Resin | Flexural strength | Elongation | Young’s modulus | Noted traits |
|---|---|---|---|---|
| 3Dresyn PET-like | <50 MPa | <40–60% | <1000 MPa | Balanced moderate stiffness and ductility; Shore D 60–70; mid-range engineering response. |
| Balanced engineering / packaging-style resin families | Varies | Varies | Varies | Broad category; many alternatives drift either too rigid or too soft for PET-like behaviour. |
| Formlabs Tough 2000 | ~65 MPa | ~48–74% | ~1.1–1.6 GPa class | Tougher and often stiffer; closed ecosystem. |
| Liqcreate Tough-X | Impact-focused | 100–150% | Lower stiffness | More ductile and softer than balanced PET-like positioning. |
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Comparability note: PET-like behaviour in photopolymer systems is generally approximated through balanced mid-range mechanical profiles rather than strict polymer equivalence. Fair comparisons require normalization of modulus, elongation and cure state.
Where 3Dresyn PET-like Wins
1) Balanced mid-range engineering behaviour
- PET-like is positioned between rigid technical resins and highly ductile tough families, offering a practical compromise for general functional use.
2) Useful moderate stiffness with moderate ductility
- This makes it suitable for technical parts that should not be too rigid, but also should not collapse into very soft flexible behaviour.
3) General-purpose functional fit
- Useful for balanced functional parts, housings, semi-rigid shells and technical components with moderate deformation tolerance.
Application Guidance
- Choose 3Dresyn PET-like for: balanced technical parts, semi-rigid covers, general engineering components and functional geometries requiring a mid-range mechanical profile.
- Choose a stiffer material if dimensional rigidity dominates.
- Choose a softer ductile material if flex and elongation dominate.
Processing Notes (Quick Start)
- Compatible with open SLA, DLP and LCD systems in the 385–405 nm range.
- Use validated cure conditions to maintain the intended balance between stiffness and elongation.
Normalization & Caveats
- PET-like positioning is an engineering behaviour analogy, not direct equivalence to molded PET.
- Mechanical balance depends strongly on post-curing and geometry.
References
- 3Dresyn PET-like internal product data
- Relevant balanced engineering resin documentation
- Formlabs Tough 2000 TDS
- Liqcreate Tough-X TDS