Identification of fabric components
A simple method to identify fabric components is combustion.The method is to extract a wisp of fabric yarn containing warp and weft at the hem of the garment, ignite it with fire, observe the state of burning flame, smell the smell of cloth yarn after burning, look at the residue after burning, so as to judge whether the fabric composition is consistent with that marked on the garment durability label, in order to distinguish the authenticity of fabric composition.
Cotton fiber and hemp fiber
Both cotton fiber and hemp fiber are on fire immediately, burning fast, the flame yellow, blue smoke.The difference between them in the smell of burning and the ashes after burning is that the paper smell is produced by cotton burning and the wood ash smell is produced by hemp burning.After burning, cotton has very little powder ashes, black or gray, hemp produces a small amount of gray white powder ashes.
Wool and silk
Hair on fire smoke, when burning bubble, slow burning rate, give out the burning hair of the scorch odour, after burning ash is mostly shiny black spherical particles, a finger crushed.They burn slowly and hiss, giving off the smell of burning hair. When burned, they form small balls of dark brown ash.
Third, polyamide and polyester
Polyamide fiber is a polyamide fiber. When it is near the flame, it will shrink rapidly and melt into a white gel. When it is burning, it will drip and bubble.Polyester polyester fibers, easy to ignite, near the flame of the shrinkage, burning when the melting side of smoke, yellow flame, aromatic smell, burned after the ash is black and brown hard blocks, with fingers can be broken.
4. Acrylic and polypropylene
The acrylic fiber, known as polyacrylonitrile fiber, softened and melted in the near fire. After burning, it glows black smoke. The flame is white.Polypropylene fiber, a polypropylene fiber, melted near the flame, flammable, burning slowly from the fire and emitting black smoke, the flame yellow on the top, blue on the bottom, emitting oil flavor, burned ash hard round pale yellow brown particles, easy to break hand.
V. polyvinyl chloride and polyvinyl chloride
Vinylon scientific name polyvinyl formal fiber, not easy ignite, near flame melt shrink, when burning, there is a bit of flame at the top, wait for fiber to melt into glue shape flame to become big, have thick black smoke, send out bitter sweet smell, after burning, remain black small bead shape grain, usable finger is crushed.Polyvinyl chloride (PVC) fiber, hard to burn, extinguishes the fire immediately, the flame is yellow, green and white smoke at the lower end, emitting pungent, pungent and acrid taste, after burning ashes for black and brown irregular hard blocks, fingers not easy to crush.
Six, spandex and fluorlon
Polyurethane fiber, a kind of polyurethane fiber, melted and burned near the fire. When burned, the flame appears blue, and continues to fuse after leaving the fire, giving off a special pungent smell. After burning, the ash is soft and fluffy black ash.Polytetrafluoroethylene (teflon) fiber as its scientific name, ISO organization called it fluorite fiber, the near flame only melts, difficult to ignite, does not burn, the edge flame shows bluish green carbonization, melts and decomposes, the gas is poisonous, the melt is hard round black bead.Fluoron fiber is often used in the textile industry to make high performance sewing thread.
Viscose fiber and cuprammonium fiber
Viscose fibers are flammable and burn quickly. The flame is yellow and gives off the smell of burning paper.Ammonium cupric fiber common name tiger wood cotton, near the flame is burning, burning fast, the flame is yellow, spreading ester acid taste, burning ash is very few, only a small amount of grey black ash.