Burning Characteristics of Fibers: A Guide to Identification and Analysis
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Fiber | Behavior in Flame | Behavior When Removed from Flame | Odor | Residue |
---|---|---|---|---|
Cotton/Flax | Does not shrink away; burns quickly, ignites easily | Continues to burn; glows after burning | Similar to burning paper | Light, feathery gray ash |
Polyester | Fuses, melts, and shrinks away from flame | Self-extinguishes; drips molten polymer | Chemical odor | Hard, tough gray bead |
Nylon | Melts, fuses, and curls away from flame | Self-extinguishes; drips molten polymer | Similar to celery | Hard, tough tan bead |
Acrylic | Melts and sputters; shrinks away from flame | Self-extinguishes; brittle molten drops | Acrid or chemical odor | Hard, black irregularly shaped bead |
Wool/Silk | Burns slowly, curls away from flame, sputters slightly | Self-extinguishes | Similar to burning hair | Crushable black bead |
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