According to the different chemical composition of the non-woven fiber, the combustion characteristics are also different, so as to roughly distinguish the major categories of non-woven fibers. The comparison of the combustion characteristics of several common non-woven fibers is as follows:
(1) Cotton, hemp, viscose, cupra: close to the flame: no shrinkage and no melting; contact with the flame: rapid burning; leaving the flame: continuing to burn; smell: the smell of burning paper; residue characteristics: a small amount of gray black or gray white ash.
(2) Silk and wool fiber: close to flame: curl and melt; contact flame: curl, melt, burn; leave flame: slow burning and sometimes extinguish by itself; smell: smell of burnt hair; residue characteristics: loose and brittle black particles Or coke-like.
(3) Polyester fiber: close to the flame: melting; contacting the flame: melting, smoking, slow burning; leaving the flame: continuing to burn, sometimes extinguished by itself; smell: special aromatic sweetness; residue characteristics: hard black round beads .
(4) Nylon fiber: near the flame: melting; contacting the flame: melting, smoking; leaving the flame: self-extinguishing; smell: amino smell; residue characteristics: hard light brown transparent round beads.
(5) Acrylic fiber: close to the flame: melting; contacting the flame: melting and smoking; leaving the flame: continuing to burn and emitting black smoke; smell: spicy; residue characteristics: black irregular beads, fragile.
(6), polypropylene fiber: close to the flame: melting; contact with the flame: melting, burning; leaving the flame: continue to burn; smell: paraffin; residue characteristics: off-white hard transparent beads.
(7) Spandex fiber: close to the flame: melting; contacting the flame: melting, burning; leaving the flame: self-extinguishing; smell: peculiar smell; residue characteristics: white gel.
(8) Chlorine fiber: near the flame: melting; touching the flame: melting, burning, black smoke; leaving the flame: self-extinguishing; smell: pungent smell; residue characteristics: dark brown lumps.
(9) Vinylon fiber: close to the flame: melting; contacting the flame: melting and burning; leaving the flame: continuing to burn and emitting black smoke; smell: unique fragrance; residue characteristics: irregularly burnt brown lumps.
