An easy way to identify the composition of a knitted mesh fabric is the combustion method. The method is to draw a cloth containing warp and weft yarn at the seam edge of the mesh cloth, ignite it with fire, observe the state of the burning flame, smell the smell of the cloth after burning, and see the residue after burning, thereby Determine whether the fabric component marked on the durability label of the mesh fabric matches, in order to distinguish the authenticity of the fabric component of the mesh fabric.
First, cotton fiber and hemp fiber
Both cotton fiber and hemp fiber are burning near the flame, burning rapidly, the flame is yellow, and blue smoke is emitted. The difference between the odor of burning and the ash after burning is that the cotton burns to emit a paper odor, and the numbness emits a ash ash; after burning, the cotton has very little powder ash, which is black or gray, and the hemp produces a small amount of grayish white ash.
Second, wool fiber and silk
When the hair meets the fire and smokes, it foams when burned, and the burning speed is slow. It emits the burnt smell of burnt hair. After burning, the ash is mostly shiny black spherical particles, and the fingers are crushed. The silk huddled in a fire, and the burning speed was slower, accompanied by a squeaking sound, which gave off the burning smell of the hair. After burning, it formed a dark brown globular ash, and the handcuffs were broken.
Third, nylon and polyester
The polyamide fiber of nylon name is rapidly curled and melted into a white gel. It melts and blisters in the flame, and there is no flame when burning. It is difficult to continue burning after leaving the flame, emitting celery flavor, and light brown melting after cooling. Things are not easy to break. Polyester fiber name is easy to ignite. It is melted near the flame. When burning, it emits black smoke when it melts. It has a yellow flame and emits an aromatic odor. After burning, the ash is a black-brown hard block, which can be broken with fingers.
4. Acrylic and polypropylene
Acrylic fiber name polyacrylonitrile fiber, near fire softening and melting, black smoke after the fire, the flame is white, burning quickly after the flame, emitting the bitter smell of fire meat, after burning, the ash is irregular black lumps, handcuffs are brittle . Polypropylene fiber, polypropylene fiber, near the flame is melted, flammable, burning slowly from the fire and black smoke, the upper end of the flame is yellow, the lower end is blue, emitting oily smell, after burning, the ash is hard round light yellow brown granules, hand 捻 easy broken.
V. Vinyl and polyvinyl chloride
The name of vinylon is not easy to ignite, the near flame melts and shrinks, and there is a little flame at the top when burning. When the fiber melts into a gelatinous flame, it has a thick black smoke, a bitter smell, and black after burning. Bead-like particles that can be crushed with your fingers. The name of polyvinyl chloride fiber is difficult to burn. It is extinguished when it leaves the fire. The flame is yellow, and the lower end is green and white smoke. It emits a pungent and pungent spicy acidity. After burning, the ash is dark brown and irregular lumps, and the fingers are not easy to be broken.
Sixth, spandex and fluorocarbon
Polyurethane, the name of spandex fiber, burns near the edge of the fire. When burning, the flame is blue. It leaves the fire and continues to melt, giving off a special irritating odor. After burning, the ash is soft and fluffy black ash. Fluorine fiber name polytetrafluoroethylene fiber, ISO organization called it fluorite fiber, near flame only melt, difficult to ignite, not burning, edge flame is blue-green carbonization, melting and decomposition, gas is toxic, the melt is hard round black Beads. Fluorinated fibers are commonly used in the textile industry to make high performance sewing threads.
7. Viscose fiber and copper ammonium fiber
Viscose fiber is flammable, burning speed is fast, the flame is yellow, and the smell of burning paper is emitted. After burning, the ash is less, and it is smooth and twisted with light gray or grayish white powder.