The properties, characteristics and identification methods of clothing fabrics

Cotton fiber and hemp fiber

Cotton fiber and hemp fiber are just near the flame burning, burning quickly, the flame is yellow, blue smoke. The difference between the two is that cotton burning gives out the smell of paper while hemp burning gives out the smell of wood ash. After combustion, cotton has very little powder ash, black or gray, hemp will produce a small amount of gray powder ash.

Wool fibers and pure silk

Hair meets fire to smoke, when burning bubble, burning speed is slower, send out the burnt stink that burns a hair, after burning ash is glossy black ball grain more, the finger presses namely broken. It shrinks into clumps by fire, burns slowly and hissing, and gives off a singed smell of hair. When burned, it forms small balls of black and brown ash, which can be broken if you twist it.

3. Polyamide fiber and polyester

Polyamide fiber, the scientific name of polyamide fiber, near the flame is quickly rolled down into white glue, in the flame of melting drop and bubble, there is no flame when burning, leaving the flame is difficult to continue burning, emitting a celery flavor, after cooling light brown melt is not easy to grind. Polyester polyester fiber, easy to ignite, near the flame melting shrinkage, burning edge melting edge black smoke, yellow flame, sending out a sweet smell, burning ashes for dark brown hard, with fingers can be broken.

Four, acrylic and Polypropylene fiber

Acrylonitrile fiber is known as polyacrylonitrile fiber. It melts and shrinks near the fire, gives off black smoke and white flame, and burns quickly after leaving the flame, giving off the bitter smell of burning meat. After burning, the ashes are irregular black hard pieces, which can be easily broken by hand twist. Polypropylene fiber, known as polypropylene fiber, is melted near the flame, flammable, burns slowly away from the fire and gives off black smoke. The top of the flame is yellow and the bottom is blue, emitting oil smell. After burning, the ashes are hard round and light brown particles, which are easily broken by hand twist.

V. Vinylon and Chloroprene

Pva is known as polyvinyl formal fiber, not easy to ignite, near flame melting shrinkage, combustion top has a little flame, when the fiber melts into a gelatinous flame become larger, there is a thick black smoke, send out bitter smell, burning left with black beads of particles, can be crushed by fingers. Polyvinyl chloride fiber, difficult to burn, from the fire is extinguished, the flame is yellow, the lower green white smoke, emitting a pungent acrid acid smell, burning ashes for black brown irregular hard, fingers are not easy to twist broken.

Spandex and flon

Polyurethane fiber, also known as polyurethane fiber in science, melts and burns near the fire. When burning, the flame is blue and melts away from the fire, giving off a particularly pungent odor. After burning, the ashes become soft and fluffy black ash. Fluoron scientific name polytetrafluoroethylene fiber, ISO organization called it fluorite fiber, near the flame only melting, difficult to ignite, do not burn, edge flame is blue green carbonization, melting and decomposition, gas toxic, molten material for hard round black beads. Fluorocarbon fiber is often used to make high performance sewing thread in textile industry.

Viscose fiber and cuprammonium fiber

Viscose fiber is inflammable, burning speed is very fast, the flame is yellow, sending out burning paper smell, burning ash less, a smooth twisted strip of light gray or gray white fine powder. Cuprammonium fibre common name is kapok, near the flame is burning, burning speed, the flame is yellow, sending out ester acid taste, burning ashes, only a small amount of gray black ash.