According to the different chemical composition and combustion characteristics of non-woven fibers, the non-woven fibers can be roughly classified. The comparison of combustion characteristics of several common non-woven fibers is as follows:
(1) cotton, hemp, viscose fiber, copper ammonia fiber: close to the flame: non shrinking and non melting; Contact with flame: rapid combustion; Leave the flame: continue to burn; Smell: 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 and burn; Leave the flame: burn slowly and sometimes extinguish by itself; Smell: the smell of burning hair; Residue characteristics: loose and brittle black particles or coke.
(3) polyester fiber: close to flame: melting and shrinking; Contact flame: melting, smoking, slow combustion; Leave the flame: continue to burn, sometimes extinguish by itself; Odor: special aromatic sweet taste; Residue characteristics: hard black round beads.
(4) nylon fiber: close to flame: melting and shrinking; Contact flame: melting and smoking; Leaving the flame: self extinguishing; Odor: amino odor; Residue characteristics: hard light brown transparent round beads.
(5) acrylic fiber: close to flame: melting and shrinking; Contact flame: melting and smoking; Leave the flame: continue to burn, emitting black smoke; Smell: spicy; Residue characteristics: Black irregular beads, fragile.
(6) Polypropylene fiber: close to flame: melting and shrinking; Contact flame: melting and burning; Leave the flame: continue to burn; Odor: paraffin smell; Residue characteristics: gray white hard transparent round beads.
(7) spandex fiber: close to flame: melting and shrinking; Contact flame: melting and burning; Leaving the flame: self extinguishing; Odor: special flavor; Residue characteristics: white colloidal.
(8) . nylon fiber: close to flame: melting and shrinking; Contact flame: melting, burning, emitting black smoke; Leaving the flame: self extinguishing; Odor: pungent odor; Residue characteristics: dark brown hard block.
(9) vinylon fiber: close to flame: melting and shrinking; Contact flame: melting and burning; Leave the flame: continue to burn, emitting black smoke; Odor: unique fragrance; Residue characteristics: irregular Brown hard lump.