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发布人：admin发布时间：2020-04-02 10:46:12

　　A simple method to identify the components of kindergarten clothing fabric: combustion method.
　　In kindergarten, there is a thread of warp and weft under the smoke. The cloth is ignited by fire. Observe the state of the burning flame, smell the smell of the burnt fabric yarn, and see the residue after the burning. Therefore, judge that the content of the durability label of the fabric is consistent with that of the kindergarten, and identify the authenticity of the structural content.
　　Identification of fabric composition of cotton and hemp fiber kindergarten clothing: when cotton and hemp fiber burn, the flame is close, burning quickly, the flame is yellow, emitting blue smoke. After burning, cotton has little powder ash, black or gray, hemp will produce a small amount of ash powder ash.
　　The hair fiber and silk hair smoke in the fire. When it burns, it bubbles. The burning speed is slow. It gives off a burning smell of hair. After burning, the ashes are mostly smooth black spherical particles, and the fingers are broken when it is pressed. When the silk meets the indentation, the fire slows down, hisses, and gives off the smell of burnt hair. After forming a dark brown ball, it burns to ashes, and the hand twists and breaks.
　　Polyamide and polyester polyamide, the scientific name of polyamide fiber, close to the flame or curl and melt into white colloid, quickly melt and sparkle, burn in the flame without fire, leaving the flame burning hard, sending out the smell of celery, the beige melting material is not easy to crush after cooling. The scientific name of polyester fiber is polyester, which is easy to ignite. It shrinks, melts and smokes when it is close to the flame. The flame is yellow and smells fragrant. After combustion, the ash is dark brown block, which can be twisted by fingers.
　　The scientific name of propylene and polypropylene propylene is polyacrylonitrile fiber. It softens and melts near the fire and then smokes. It burns into a white flame with a large fire. After the fire burns rapidly, it gives off the bitter taste of the fire meat. After the fire, the ashes are irregular black blocks, and the hands are fragile. Scientific name of polypropylene: polypropylene fiber shrinks when it is close to the flame. It is flammable. It burns slowly and smokes. The upper part of the flame is yellow and the bottom is blue. It gives off the smell of oil smoke. The ashes after burning are like small hard yellow brown particles, which are fragile after being twisted by hand.

　　Its scientific name is Whalen and chloro fiber Whalen polyvinyl formal fiber, which is not easy to ignite. It is near the flame melting and contracting. There is a little flame on the top. The flame is a mixed gelatinized flame of fiber, with thick black smoke and bitter sweet smell. After burning, it leaves small black beads, which can be crushed by fingers. Its scientific name is PVC fiber, which is not easy to burn. If it is far away from the fire, it will be extinguished. The flame is yellow, with green and white smoke at the bottom. It is spicy and sour. After burning, the ash is dark brown irregular block, and the fingers are not easy to break.
　　Spandex and halothane spandex, also known as polyurethane fiber, melt and burn near the fire. When the flame burns, it is blue, and continues to melt and burn away from the fire, giving out a special pungent smell. The ash after combustion is soft and fluffy black ash.
　　ISO organization calls it fluorite fiber. It is only melted near the flame, which is difficult to ignite and does not burn. The flame edge is blue-green carbonization, melting decomposition, toxic gas, melting into a hard round black bead.

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