[Position] Fiber identification method

One, cotton fiber and hemp fiber

Both the cotton fiber and the hemp fiber are flammable immediately after being fired, burning rapidly, and the flame is yellow and blue smoke. The difference between the burning odor and the burning ash is that the cotton burns a paper smell and the hemp burns out the ash odor; after burning, the cotton has very little powder ash, which is black or gray, and the hemp produces a small amount of grayish white powder ash.

Second, wool fiber and silk

Hairy fire smoke, burning, foaming, burning slower, emitting a burning smell of burnt hair, burned ashes are mostly glossy black spherical particles, a finger pressure is broken. The silk shrank into a lump in the form of fire, burning slowly, accompanied by buzzing sounds, emitting a burning smell of the hair, and forming a dark brown ash-like ash after burning, and the handcuffs were broken.

Third, nylon and polyester

Polyamide polyamide fiber, near the flame that quickly curled into a white gel, melting in the flame dripping and blistering, there is no flame when burning, it is difficult to continue to burn away from the flame, emitting a celery flavor, light brown melting after cooling Things are not easy to grind. Polyester scientific name polyester fiber, easy to ignite, near the flame that is melted down, burning time while melting black smoke, a yellow flame, emitting an aromatic smell, burning ash after the dark brown hard block, with your fingers can smash.

Fourth, acrylic and polypropylene

Acrylic name polyacrylonitrile fiber, near the fire softening and melting, black smoke after the fire, the flame was white, quickly burning from the flame, emitting a bitter taste of the fire meat, burned as irregular black hard ash, handcuffs fragile . Polypropylene Polypropylene fiber, near the flame that is melted, flammable, slowly burning from the fire and black smoke, the flame is yellow on the top, the lower end of the blue, emitting an oil flavor, burned after the ash is a hard round yellow-brown particles, easy to handcuffs broken.

V. Vinyl and Kleenex

Vinyl's scientific name is polyvinyl acetal fiber, which is not easy to ignite, and the flame is melted and contracted. When the flame is burning, there is a bit of flame at the top. When the fibers are all melted into a jelly flame, the flame becomes thicker, there is thick black smoke, and the smell of bitterness is emitted, leaving black after burning. Bead-like particles can be crushed with your fingers. Lactose fiber name PVC fiber, it is difficult to burn, away from the fire that is extinguished, the flame is yellow, the lower end of the green white smoke, irritating pungent pungent sour, burning after the ashes are dark brown irregular hard block, the fingers are not easy to smash.

Six, spandex and Kevlar

Spandex scientific name polyurethane fiber, near the edge of the fire edge burning, burning blue flame, leaving the fire to continue to ignite, emitting a special irritating odor, burning after the soft fluffy gray ashes. Teflon scientific name of PTFE fiber, ISO organization called it fluorite fiber, near the flame only melt, difficult to ignite, do not burn, the edge of the flame was blue and green carbonization, melting and decomposition, gas toxic, the melt is a hard round black Beads. Fluorofibers are commonly used in the textile industry to make high-performance sewing threads.

Seven, viscose fiber and copper ammonium fiber

Viscose fibers are flammable, burning fast, yellow flames, smell of burning paper, and less ash after firing. They are smooth twisted ribbons of light gray or grayish white fine powder. The common name of tiger-ammonium fiber is kapok, which is burned near the flame. The burning speed is fast, the flame is yellow, and the ester is sour. After burning, there is very little ash. There is only a small amount of grey-black ash.