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65 clicksPure PA12 (unmodified): typically UL94 HB (flammable, slow burning, non self extinguishing), with an oxygen index of approximately 21%, flammable, dripping, and non flame retardant.
UL94 V-0 (most common): 0.8-3.0mm thickness can reach V-0 (self extinguishing, no dripping), available in both halogen-free and halogen containing systems.
UL94 V-1/V-2: Some hoses/extrusion grades are V-2 (self extinguishing, drip allowed).
Oxygen index LOI: The flame retardant level can reach 28% -34% (the higher, the more difficult it is to ignite).
Hot wire GWIT: 750-960 ℃ (no sustained flame).
Typical brand flame retardant parameters (UL94)
Winstar VESTAMID ® LX9104: V-0 @ 0.8mm, LOI 28% (halogen-free).
BASF Ultramid ® PA12 FR: V-0 @ 1.5/3.0mm (halogen-free).
HP MJF PA12 FR：V-0 @2.5mm， Zero halogen, specifically designed for 3D printing.
Flame retardant PA12 hose: V-2 (industrial/automotive wiring harness).
Supplementary standards
Rail transit: EN45545 HL1/HL2 (low smoke and low toxicity).
Aviation: FAR 25.853 (flame retardant/low smoke).
Key selection points
Thin walled parts (≤ 1.0mm): Choose V-0 @ 0.8mm (such as LX9104).
Structural components (≥ 1.5mm): V-0 @ 1.5/3.0mm universal.
Hose/extrusion: mostly V-2, with lower cost.
