How to identify the composition of lace fabric?
Feb 21, 2024
As long as you take out a piece of silk from the fabric, ignite it with fire, and then observe the state of the burning flame, smell the smell of the burning cloth, and look at the residue after burning, you can judge the clothing durability label. Whether the fabric composition is consistent to identify the authenticity of the fabric composition.
The main components of lace fabrics are: nylon, polyester, spandex, fluorine elastic, viscose fiber, cupro fiber, etc. The chemical reactions produced by different components when burned are different, as follows:
1. Nylon and polyester
Nylon, scientific name polyamide fiber
Close to the flame, it quickly curls and melts into a white gel. The melt drips and bubbles in the flames. There is no flame when burning, and it is difficult to continue burning without flame.
Polyester, scientific name polyester fiber
It is easy to ignite and melts when close to flame. When burning, it emits black smoke when melting, showing a yellow flame and emitting an aromatic smell. After burning, the ash will be dark brown lumps that can be crushed with your fingers.
2. Spandex and fluorine
Spandex, scientific name polyurethane fiber
It melts and burns close to fire. When burning, the flame appears blue. When it leaves the fire, it continues to melt and emits a special pungent smell. The ash after burning is soft and fluffy black ash.
PTFE, scientific name polytetrafluoroethylene fiber
The ISO organization calls it fluorite fiber. Melts only close to the flame, is difficult to ignite, and does not burn. The edge flame is blue-green carbonized, melts and decomposes, the gas is toxic, and the melt is a hard round black bead. Fluorofibers are commonly used in the textile industry to make high-performance sewing threads.
3. Viscose fiber and cuprammonium fiber
Viscose fibers are flammable and burn quickly. The flame is yellow and smells like burning paper. Less ash after burning. It is a light gray or off-white fine powder with smooth twisted bands.
Cuprammonium fiber, commonly known as tiger kapok
It burns near the flame. Burns quickly. The flame is yellow and gives off a sour smell. There are very few ash after burning, only a small amount of gray black.
