祥彩纺织

A simple method to identify the composition of clothing fabrics is the combustion method. The method is to draw a piece of cloth yarn containing warp yarn and weft yarn at the seam of the garment, light it with fire, observe the state of the burning flame, smell the smell of the cloth yarn after burning, and look at the residue after burning, so as to judge Whether it is consistent with the fabric composition marked on the clothing durability label to identify the authenticity of the fabric composition.

1. Cotton fiber and hemp fiber Cotton fiber and hemp fiber are both ignited when they are close to the flame, and they burn quickly. The flame is yellow and emits blue smoke. The difference between the smell of the two when burning and the ashes after burning is that the burning of cotton gives off the smell of paper, and the burning of hemp gives off the smell of plant ash; after burning, cotton has very little powder ash, which is black or gray, and hemp produces a small amount of off-white powder ash.

2. Wool fiber and silk. Wool smokes when exposed to fire, foams when burned, burns slowly, and emits a burnt smell of hair. After burning, the ashes are mostly glossy black spherical particles, which will shatter when pressed with a finger. Silk shrinks into balls when exposed to fire, burns slowly, with a hissing sound, and emits the smell of burnt hair. After burning, it forms dark brown balls of ashes, which can be crushed when twisted by hand.

3. Nylon and polyester nylon are scientifically named polyamide fibers. When they are close to the flame, they quickly shrink and melt into a white gel. They melt and burn in the flame, drip and foam. There is no flame when burning, and it is difficult to continue burning away from the flame. After cooling, the beige molten material is not easy to grind. The scientific name of polyester is polyester fiber. It is easy to ignite, and it melts and shrinks when it is close to the flame. When it burns, it melts and emits black smoke. It shows a yellow flame and emits an aromatic smell.

4. The scientific name of acrylic fiber and polypropylene fiber is polyacrylonitrile fiber, which softens and shrinks near the fire, emits black smoke after being on fire, and the flame is white, and burns rapidly after leaving the flame, emitting the bitter smell of burning meat. After burning, the ashes are irregular black lumps , hand-twisted fragile. The scientific name of polypropylene fiber is polypropylene fiber. It melts and shrinks when it is near the flame. It is flammable and burns slowly when it is away from the fire and emits black smoke. The upper end of the flame is yellow and the lower end is blue. broken.

5. Vinylon and polyvinyl chloride are scientifically named polyvinyl formal fiber, which is not easy to ignite. It melts and shrinks near the flame. When burning, there is a little flame at the top. After the fibers are melted into a gelatinous flame, the flame becomes larger, with thick black smoke and a bitter smell. , After burning, black bead-like particles remain, which can be crushed with fingers. The scientific name of polyvinyl chloride is polyvinyl chloride fiber, which is difficult to burn and extinguishes immediately after leaving the fire. The flame is yellow, and the lower end of the green white smoke emits a pungent, pungent, spicy and sour smell.

6. Spandex and Fluorine Spandex is scientifically named polyurethane fiber, which burns while melting near the fire. When burning, the flame is blue. It continues to melt and burn away from the fire, emitting a special pungent odor. After burning, the ashes are soft, fluffy black Ash. The scientific name of fluorine fiber is polytetrafluoroethylene fiber, and the ISO organization calls it fluorite fiber. It only melts near the flame, is difficult to ignite, and does not burn. The edge flame is blue-green and carbonized. It melts and decomposes. The gas is poisonous. beads. Fluorine fibers are commonly used in the textile industry to manufacture high-performance sewing threads.

7. Viscose fiber and cuprammonium fiber Viscose fiber is flammable,