ESD-Safe Resin ESD-FR
Additive grade
ESD-FR = flame-retardant ESD resin
Specify when the ESD fixture must also meet flammability requirements (rail, aerospace interiors, enclosures near live electronics).
Values for the ESD-FR condition
Other ESD-Safe Resin grades and fills
ESD-Safe Resin is listed in 5 conditions; see the grade overview at ESD-Safe Resin.
Compare all 5 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
impact-modified tough ESD resin | Choose for snap features, thin clips and drop-handled ESD tooling where ductility matters more than stiffness. | — | 40 | 25 | 75 Shore D |
conductive / low-resistance ESD resin (10⁴–10⁶ Ω) | Pick when a grounded, near-conductive surface is required (charge draining, shielding-adjacent fixtures) and higher filler-driven brittleness is acceptable. | — | 45 | 3 | 84 Shore D |
ESD-FRThis page Flame-retardant ESD resin | Specify when the ESD fixture must also meet flammability requirements (rail, aerospace interiors, enclosures near live electronics). | — | 50 | 4 | 85 Shore D |
ESD-STDDefault Standard static-dissipative rigid ESD resin | Default choice for ESD-safe jigs, nozzles, trays and PCB fixtures needing dissipative (not conductive) surfaces. | — | 52 | 6 | 82 Shore D |
High-temperature / filled ESD resin | Use for ESD-safe fixtures that see reflow-adjacent heat, ovens or hot test stations; stiffer and more brittle than the standard grade. | — | 60 | 2 | 88 Shore D |
What is ESD-Safe Resin ESD-FR?
ESD-Safe Resin ESD-FR is ESD-Safe Resin in the ESD-FR grade — specify when the ESD fixture must also meet flammability requirements (rail, aerospace interiors, enclosures near live electronics). ESD-Safe Resin ESD-FR has a tensile strength of 50 MPa (7.25 ksi), stronger than 54% of polymer grades. Elongation at break is 4% and the elastic modulus is 2.8 GPa (0.406 Msi). ESD-Safe Resin ESD-FR has a density of 1.3 g/cm³ (0.047 lb/in³), heavier than 69% of polymer grades. Its glass-transition temperature is 68°C (154 °F). ESD-STD is the default condition FabDigit quotes; ESD-FR is available on request or by drawing note.
Limitations
- Difficult to weld — 5/100, worse than 89% of polymer grades
- Limited ductility — 4%, worse than 78% of polymer grades
- Needs corrosion protection — 70/100, worse than 78% of polymer grades
ESD-Safe Resin ESD-FR properties
Typical room-temperature values for ESD-Safe Resin ESD-FR; 12 are specific to this condition. Other listed values are ESD-Safe Resin reference data and may not represent this condition. Bars are the position among polymer grades.
Physical4
ESD-Safe Resin ESD-FR has a density of 1.3 g/cm³ (0.047 lb/in³), heavier than 69% of polymer grades. Its glass-transition temperature is 68°C (154 °F).
Mechanical10
ESD-Safe Resin ESD-FR has a tensile strength of 50 MPa (7.25 ksi), stronger than 54% of polymer grades. Elongation at break is 4% and the elastic modulus is 2.8 GPa (0.406 Msi).
Thermal10
ESD-Safe Resin ESD-FR is rated for continuous service to 75°C (167 °F). It conducts heat at 0.22 W/m·K (0.127 BTU/hr·ft·°F), better than 60% of polymer grades. Thermal expansion is 80 µm/m·K (44.4 µin/in·°F).
Electrical3
ESD-Safe Resin ESD-FR has an electrical resistivity of 1,000,000 Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (70/100), worse than 78% of polymer grades. UV resistance is fair.
Sustainability3
Producing a kilogram of ESD-Safe Resin ESD-FR takes about 115 MJ of energy and emits 5.5 kg of CO₂ — more than 70% of polymer grades. Typical recycled content is 0%.
Manufacturability4
ESD-Safe Resin ESD-FR's machinability is good (55/100, worse than 64% of polymer grades); weldability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ESD-Safe Resin ESD-FR
Is ESD-Safe Resin easy to machine?
Drilling, tapping and light milling are possible on fully post-cured parts with sharp tools and low feed; conductive filler is abrasive and edges chip, so leave 0.2–0.3 mm stock and avoid coolant soak.
Can ESD-Safe Resin be welded?
Not weldable (crosslinked thermoset); join with cyanoacrylate/epoxy or mechanical fasteners and heat-set inserts, and verify resistance across bond lines.
Can ESD-Safe Resin be formed, bent or molded?
Vat photopolymerization only — stir/shake thoroughly before each print because conductive filler settles, print at 25–40 °C resin temperature, then wash briefly in IPA and heat post-cure per datasheet to reach rated strength and stable resistivity.
What surface finishes work on ESD-Safe Resin?
Parts are inherently black/grey; sanding, priming or painting can insulate the surface and destroy the ESD rating, so keep functional faces as-printed (or bead-blast lightly) and retest per ANSI/ESD STM11.11.
ESD-Safe Resin chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| urethane-acrylate / epoxy-acrylate oligobackbone photopolymer network | 35 – 70 | 50 |
| acrylate/methacrylate reactive diluent mviscosity and crosslink control | 20 – 50 | 35 |
| conductive additive (carbon black / CNT sets 10⁴–10⁹ Ω resistance range; causes black/grey opacity | 0.3 – 6 | 2.5 |
| inorganic filler (silica / glass / ceram0 in standard grade, high in ESD-HT variants | 0 – 35 | 8 |
| photoinitiator + stabilizers/dispersantstypically acylphosphine oxide type | 0.5 – 4 | 2 |
ESD-Safe Resin ESD-FR — frequently asked
What is ESD-Safe Resin ESD-FR used for?
ESD-Safe Resin ESD-FR is typically used for electronics jigs and fixtures, component trays and cleanroom tooling. In short: static-dissipative printable resin; tooling-grade toughness; 60 °C service ceiling.
What is the tensile strength of ESD-Safe Resin ESD-FR?
ESD-Safe Resin ESD-FR has a typical tensile strength of 50 MPa (7.25 ksi) — stronger than 54% of polymer grades. Strength varies by condition: see the 5 listed tempers.
Is ESD-Safe Resin ESD-FR easy to machine?
Reasonably — machinability is rated good (55/100, worse than 64% of polymer grades). Drilling, tapping and light milling are possible on fully post-cured parts with sharp tools and low feed; conductive filler is abrasive and edges chip, so leave 0.2–0.3 mm stock and avoid coolant soak.
Can ESD-Safe Resin ESD-FR be welded?
Not readily — weldability is rated not recommended (5/100). Not weldable (crosslinked thermoset); join with cyanoacrylate/epoxy or mechanical fasteners and heat-set inserts, and verify resistance across bond lines.
What surface finishes work on ESD-Safe Resin ESD-FR?
Parts are inherently black/grey; sanding, priming or painting can insulate the surface and destroy the ESD rating, so keep functional faces as-printed (or bead-blast lightly) and retest per ANSI/ESD STM11.11.
Can ESD-Safe Resin ESD-FR be formed, bent or molded?
Vat photopolymerization only — stir/shake thoroughly before each print because conductive filler settles, print at 25–40 °C resin temperature, then wash briefly in IPA and heat post-cure per datasheet to reach rated strength and stable resistivity.
What is the maximum service temperature of ESD-Safe Resin ESD-FR?
ESD-Safe Resin ESD-FR is rated for continuous use to about 75°C (167 °F), and briefly to 90°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ESD Resin technical data sheet (static-dissipative SLA resin) — Formlabs (2023)
- Loctite 3D Printing photopolymer materials selector (ESD/tough/HDT grades) — Henkel (2024)
- ANSI/ESD STM11.11 Surface Resistance Measurement of Static Dissipative Planar Materials — ESD Association (2015)
- ANSI/ESD S20.20 Protection of Electrical and Electronic Parts, Assemblies and Equipment — ESD Association (2021)
- ISO 527 / ISO 178 / ISO 75 plastics test methods — ISO (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.