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    3Dresyn PEEK‑like vs. “Strongest” SLA 3D resins

    Mechanical Resistance Comparison & Executive Summary

    Across leading high-strength photopolymers, 3Dresyn PEEK-like delivers a balanced, real-world mechanical profile:

    • Elite flexural strength: 120-140 MPa, in the same class as top rigid composites.
    • High impact toughness: >30 J/m, helping reduce cracking and chipping.
    • Low density: ~1.0-1.1 g/cm³, supporting superior strength-to-weight performance.
    • High heat performance: HDT >110 °C @ 1.8 MPa and >120 °C @ 0.45 MPa.
    • Open-system compatibility: 385/405 nm SLA, DLP, LCD and MSLA printers.

    Choose resistance, not just stiffness. 3Dresyn PEEK-like pairs elite flexural strength with high impact toughness and low density, delivering a strong strength-to-weight profile compared with ultra-stiff, heavier composites. Add HDT >110 °C @ 1.8 MPa and open-system compatibility for lighter, tougher, heat-ready parts built for real engineering use, not just test coupons.

    This balance helps reduce brittle failures in functional parts compared with systems that prioritise peak MPa at the expense of toughness and weight.

    Mechanical resistance comparison for 3Dresyn PEEK-like resin

    Data Table - Flexural Strength & Key Traits

    Post-cure values are compared using reported manufacturer data. Some materials report maximum flexural strength while others report stress at fixed strain, so the table should be read as a practical engineering comparison rather than a perfectly normalised test dataset.

    Resin Flexural strength Noted traits
    3Dresyn PEEK-like 120-140 MPa >30 J/m Izod, ~1.0-1.1 g/cm³, HDT >110 °C @ 1.8 MPa; open 385/405 nm. Balanced: strength + toughness + heat.
    Liqcreate Composite-X 140-170 MPa, with thermal bake Very stiff, ~9-9.5 GPa, dense at 1.62 g/cm³. High peak MPa but more brittle; open systems.
    Formlabs Rigid 10K 126-158 MPa Ultra-stiff, ~10 GPa, lower toughness; closed ecosystem.
    3D Systems Accura HPC 137-157 MPa High-rigidity composite for jigs and wind-tunnel models; SLA, closed ecosystem.
    3D Systems Accura CeraMAX 137-145 MPa Ceramic-reinforced, very rigid; SLA, closed ecosystem.
    3D Systems Accura Bluestone 124-154 MPa Nano-composite, very high stiffness; SLA, closed ecosystem.
    Stratasys Somos PerFORM 120-146 MPa Rigid, high-temperature composite; lower toughness; closed ecosystem.
    3D Systems Accura Composite PIV ~142 MPa class Rigid, high-contrast PIV tooling; SLA, closed ecosystem.
    Carbon EPX 86FR ~140 MPa class Flame-retardant, high strength; Carbon closed platform.
    Liqcreate Strong-X 134-135 MPa Strong, stiff; open systems.
    Henkel Loctite 3955 HDT280 FST ~138 MPa FR/FST with very high HDT after thermal cure; typically stiffer and more brittle; partner ecosystems.
    Nexa3D xPEEK147 111-134 MPa High temperature, HDT ~230 °C; strong; Nexa3D platform.
    Carbon CE 221 ~130 MPa, often at 5% strain Very high HDT, rigid; Carbon platform.
    Carbon EPX 150 ~123 MPa High heat, HDT ~155 °C; balanced; Carbon platform.
    Carbon EPX 82 ~120-130 MPa, often at 5% strain Durable epoxy; Carbon platform.
    Forward AM Ultracur3D RG 3280 Strength varies Extremely high stiffness, ~10 GPa, very high HDT; ceramic-filled; partner ecosystems.
    Formlabs Grey Pro ~121 MPa / ~86 MPa at 5% strain, older TDS General engineering resin; lower flexural strength than top-tier rigid composites; closed ecosystem.

    Mobile: scroll horizontally to view all columns; the resin column remains sticky. Note on comparability: some brands report stress at fixed strain, for example 5%, rather than maximum flexural strength. Several headline values require thermal post-cure. Normalise test method and post-cure when comparing.

    Where 3Dresyn PEEK-like Wins

    1. Mechanical Resistance in Real Parts

    • Impact toughness: >30 J/m notched Izod, significantly higher than many ultra-stiff composites. This helps reduce crack initiation during handling, assembly and accidental drops.
    • Strength-to-weight: with ~1.0-1.1 g/cm³ density, PEEK-like achieves specific flexural strength that rivals or exceeds heavier composites around ~1.6 g/cm³.

    2. Heat + Durability, Not Just Stiffness

    • HDT >110 °C @ 1.8 MPa supports loaded parts at elevated temperatures, relevant for tooling near motors, enclosures and thermal cycling.

    3. Open-System Compatibility & Process Agility

    • PEEK-like runs on open 385/405 nm SLA, DLP, LCD and MSLA printers. Several high-MPa competitors are locked to proprietary platforms.

    Application Guidance

    • Functional housings, snap-fits and fixtures with shock or assembly loads: choose 3Dresyn PEEK-like for strength, toughness and heat resistance.
    • Wind-tunnel models, ultra-stiff jigs and high-modulus inserts: consider Composite-X, Accura HPC, CeraMAX, Bluestone or Rigid 10K when stiffness dominates and brittleness can be mitigated by design.
    • Very high-temperature exposures: xPEEK147, CE221, Loctite 3955 and RG 3280 may offer extreme HDT; check printer access, brittleness and post-cure requirements.

    Normalisation & Caveats

    • ASTM D790 vs ISO 178: some data report maximum flexural strength, others stress at 5% strain. Normalise before ranking.
    • Thermal bake: several materials list headline MPa only after thermal post-cure. Compare against your actual post-cure process.
    • Platform lock-in: some high-MPa grades are printer-locked. PEEK-like remains open-system.

    References

    From prototyping to industrial production, performance depends on materials, calibration and process control