1 Cotton fiber and linen fiber:
Cotton fiber: It ignites as soon as it is close to the flame, burning quickly, the flame is yellow and blue smoke is emitted. When burning, it emits the smell of burning paper. After burning, the cotton fiber has very little powdery ash, which is black and gray.
Hemp fiber: It ignites as soon as it gets close to the flame. It burns quickly. The flame is yellow and blue smoke is emitted. It emits a plant ash smell and produces a small amount of off-white powdery ash after burning.
2 Wool fiber and silk:
Wool: (animal hair fiber, wool, cashmere, mink, etc.) foams when exposed to fire and smoke. , burns slowly and emits the smell of burning hair. After burning, the ashes are mostly shiny black spherical particles that break into pieces when pressed with your fingers.
Real silk: shrinks into balls when exposed to fire, burns slowly and makes a hissing sound. It emits the smell of burning hair, and after burning, the ashes form small dark brown balls that break into pieces when twisted by hand.
3 Nylon and polyester:
Nylon: the scientific name is polyamide fiber (usually called nylon), which quickly shrinks and melts into a white gel when near a flame. , melts, drips and bubbles in the flame, and burns without flame. It is difficult to continue burning without the flame and smells like celery. After cooling, the melt turns light brown and is not easy to crush.
Polyester: The scientific name is polyester fiber (really good fiber). It is easy to ignite. It melts and shrinks when it is near the flame. When it burns, it melts and emits black smoke. The flame is yellow and exudes a slightly sweet aroma. The ashes after burning are Dark brown lump. Can be crushed with fingers.
4 Acrylic fiber and polypropylene fiber:
Acrylic fiber: the scientific name is polyacrylonitrile fiber (commonly used to make chemical fiber woolen clothing), which softens and shrinks when near fire. Black smoke is emitted, and the flame is white. It burns quickly after leaving the flame, exuding the pungent smell of roasted meat. After burning, the ashes turn into irregular black lumps that are easily broken by hand.
Polypropylene: The scientific name is polypropylene fiber. It melts and shrinks when near the flame. It is flammable. It burns slowly away from the flame and emits black smoke. The upper end of the flame is yellow and the lower end is blue. It emits a petroleum smell. , the ashes after burning are hard round light yellow-brown particles, which are easily broken by hand.
5 vinylon and polyvinyl chloride:
Vinylon: scientific name is polyvinyl formal fiber. It is not easy to ignite. It melts and shrinks near the flame. There is a little bit at the top when burning. Flame, when the fibers are melted into a gel, the flame will increase rapidly, emit thick black smoke, and emit an aromatic smell. After burning, small black bead-like particles will remain, which can be crushed with your fingers.
Polyvinyl chloride: the scientific name is polyvinyl chloride fiber. It is difficult to burn and extinguishes immediately after leaving the fire. The flame is yellow with a green lower end, white smoke and a pungent, spicy and sour smell. After burning, the ashes will be dark brown irregular hard lumps that are difficult to crush with fingers.
6 Spandex and Fluoron:
Spandex: scientific name is polyurethane fiber. It burns when melted near the fire. The flame is blue and leaves The fire continues to burn, emitting a special pungent odor, and the ashes turn into soft, fluffy black ash after burning.
Fluoron: The scientific name is polytetrafluoroethylene fiber. It only melts when close to the flame. It is difficult to ignite and does not burn. The edge flame is blue-green carbonized. It decomposes after melting, and the gas is poisonous. The melt is a hard black bead, which is not easy to break when twisted by hand.
7 Viscose fiber and cuprammonium fiber:
Viscose fiber: flammable, burning very quickly, with a yellow flame and a smell of burning paper. After burning, there is little ash, which is a smooth twisted belt-shaped light gray or off-white fine powder.
Copper ammonium fiber: Commonly known as tiger kapok, it burns when near a flame. It burns very fast. The flame is yellow and emits the smell of chemical ester acid. There is very little ash after burning, only a small amount. Gray black gray.
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