SUNLU ABS-FR Filament Guide
Flame-retardant ABS with UL94 V-0 for safety-critical 3D printing applications
In professional FDM 3D printing, there is an increasing demand for materials that combine mechanical stability with tested flame retardancy. SUNLU ABS-FR (Flame Retardant) was developed precisely for these requirements.
The filament is certified to UL94 V-0—the highest standard for self-extinguishing plastics—and is ideally suited for applications in electronics, industry, automotive, and public infrastructure.
What is SUNLU ABS-FR?
SUNLU ABS-FR is a halogen-free, flame-retardant ABS filament that has been specifically optimized for FDM 3D printing. Compared to standard ABS, it offers additional fire protection without sacrificing impact resistance or processability.
- UL94 V-0 certified
- Self-extinguishing within ≤10 seconds
- No burning drips
- High impact and heat resistance
UL94 V-0 explained: Why this certification is critical
The UL94 V-0 classification is the most rigorous vertical burn test for plastics. The material must self-extinguish after the flame is removed and must not produce any burning drips.
SUNLU ABS-FR uses a modern intumescent flame retardant formula that forms a protective char layer when heated, effectively stopping the spread of fire.
This makes the filament suitable for applications with high safety requirements according to IEC, EN, and industrial fire safety standards.
Mechanical & thermal properties
- Impact strength: high, ideal for load-bearing components
- Heat deflection temperature (HDT): up to 86.5 °C
- Low warping: optimized for stable prints
- Diameter tolerance: ±0.03 mm
- Surface: uniform & layer-stable
This positions SUNLU ABS-FR between standard ABS and expensive engineering filaments such as PC-ABS or FR-nylon.
Typical applications for ABS-FR
Electronics & Electrical Engineering
Housings for power supply units, control boxes, PCB mounts, or battery modules where fire protection is critical.
Automotive & Transport
Interior components, brackets, air ducts, and functional prototypes with increased safety requirements.
Industry & Tools
Jigs, assembly aids, grippers, and functional parts for industrial environments.
Drones & RC applications
Motor mounts, structural parts, and frames with improved safety for electrical components.
Recommended print settings for SUNLU ABS-FR
- Nozzle temperature: 240–260 °C (recommended: 245 °C)
- Heated bed: 80–100 °C
- Print speed: 50–150 mm/s
- Fan: 0–30%
- Enclosure: strongly recommended
- Drying the filament: 50 °C, 4–6 hours
An enclosed print chamber reduces warping and significantly improves layer adhesion.
Why choose SUNLU ABS-FR?
- Tested UL94 V-0 flame retardancy
- Halogen-free formula
- Stable dimensional accuracy
- Industrial performance at an attractive price
- Reliable quality from SUNLU
Conclusion
SUNLU ABS-FR is the ideal solution for anyone needing to combine safety, stability, and reliability in 3D printing. From functional prototypes to real-world end applications, this filament enables professional results with tested flame-retardant performance.
