The simple method of distinguishing the composition of garment fabrics is combustion method. The practice is to draw a thread of cloth that contains the warp and weft in the hem of the garment, use fire to ignite it, observe the state of burning flame, smell the smell of cloth after burning, look at the residue after burning, and judge whether the fabric is in conformity with the label of clothing durability tag, to distinguish the authenticity of fabric components.
Cotton Fibre and hemp fiber
Cotton fibres and hemp fibers are fire-ignited, burning quickly, yellow flames, blue smoke. The difference between the smell of burning and the burning of ashes is that the cotton burns out the smell of paper, the hemp burns out the smell of vegetation, and after burning, the cotton has very little powder ashes, black or gray, and hemp produces a small amount of gray and white powder ashes.
Second, wool fiber and silk
Hair in the fire smoke, burning foaming, burning slower, emitting a burning hair of the burning smell, after burning ashes for shiny black spherical particles, fingers a crush. Pure silk in the form of a pellet, burning slower, accompanied by a hissing sound, emitting hair burning smell, after burning into a black-brown ball-like ashes, hand twist is broken.
Nylon and Polyester
Nylon Scientific name polyamide fiber, near the flame that quickly shrink melt into white glue, melt in the flames and foaming, burning without flame, leaving the flame is difficult to continue burning, emitting celery flavor, cooling light brown molten material is not easy to grind. Polyester is the name of polyester, easy to ignite, near the flame that is melting shrink, burning edge of the melting edge of black smoke, yellow flame, emitting aromatic odor, after burning ashes for dark brown hard block, with fingers can be twisted.
Acrylic fiber and polypropylene fiber
Acrylic fiber is the name of Polyacrylonitrile fibers, near-fire softening melt shrinkage, after the fire, black smoke, white flame, from the flame quickly after burning, emitting the bitterness of burning meat odor, after burning ash for irregular black hard block, hand twist fragile. Polypropylene fiber, the near flame is melting shrink, flammable, burning slowly from the fire and black smoke, the upper end of the flame yellow, blue at the lower end, emitting oil flavor, after burning ashes for hard round light yellow brown particles, hand twist fragile.
Five, Vinylon and VDC
Vinylon is the name polyvinyl acetal fiber, not easy to ignite, near flame melting contraction, burning the top there is a little flame, to the fiber melts into a rubber-like flames, there are black smoke, fragrance odor, after burning the remaining small beads of the dark bead, can be crushed with fingers. VDC is a scientific name polyvinyl chloride fiber, difficult to burn, out of the fire, the flame is yellow, the lower green white smoke, emitting irritating pungent acrid sour, burning ashes for Black brown irregular hard block, fingers are not easy to twist.
Six, spandex and fluorine LUN
Polyurethane is the name of polyurethane fiber, near the edge of the fire burning, burning flame blue, leaving the fire continue to fuse, emitting a special irritant odor, burning ashes for soft fluffy black ash. Fluorine LUN name PTFE fiber, ISO organization called it as fluorite fiber, near flame only melting, difficult to ignite, not burning, the edge of the flame is blue-green carbonation, melting and decomposition, gas toxic, melting as hard round black beads. The fluorine fiber is used in the textile industry to manufacture high performance sewing thread.
Viscose Rayon and copper-ammonium fiber
Viscose Fiber flammable, burning fast, the flame is yellow, emitting burning odor, burned less ashes, is a smooth twisted ribbon light gray or off-white fine powder. Copper-ammonium fiber common names Tiger Kapok, near-flame is burning, burning fast, yellow flame, emitting ester sour, burned very little ashes, only a small amount of gray and black ash