Zuranyangzhishu Loi
输入材料类型与 LOI 氧指数值,判定阻燃等级与适用场景
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Oxygen index | LOI = O2 / (O2 + N2) × 100 percent, the minimum oxygen concentration sustaining combustion | ISO 4589-2:2017, oxygen index test at ambient temperature |
| Classification | An LOI below 21 percent burns readily in air; above 27 percent it is normally classed as flame retardant | ASTM D2863-19, minimum oxygen concentration for candle-like combustion |
| Textile testing | Fabric flame resistance is assessed by vertical burning and limited flame spread tests tied to end use | ISO 15025:2016, protective clothing, method of test for limited flame spread |
阻燃氧指数 (LOI) 是衡量纺织品阻燃性能的核心指标。本工具根据材料类型与 LOI 值,判定阻燃等级(易燃/可燃/难燃/阻燃),判断空气中是否自熄,并与材料参考值对比,帮助阻燃面料选型与品质评估。