When purchasing various ribbons, ribbons or ribbons, how to distinguish between different types of ribbons. Often when faced with this problem, we are at a loss, and we don’t know much about the relevant knowledge. , here we will briefly introduce the method of identification, and I hope it will be helpful to all textile friends.
Generally, it is simple and easy to use the combustion method to identify fibers, but it is not easy to judge blended products. It is necessary to draw a yarn from the warp and weft directions (ie, the vertical and horizontal directions) and burn them separately. Several warp and weft yarns of two unknown types of ribbons were removed and burned with a lighter respectively. During the burning process, some physical phenomena were observed to determine the raw materials of the warp and weft yarns. When burning, observe the flame, melting condition and smell, and the condition of the burned ashes. The following are the burning physical performance parameters of webbing, ribbon or satin materials, which can be used for your reference when using the burning identification method:
1. Cotton fiber and hemp fiber are both flammable just near the flame, burning rapidly, the flame is yellow, and blue smoke is emitted. The difference between the smell and ashes after burning is that cotton emits paper smell when burned, and hemp burns emits 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. Nylon and polyester Nylon (nylon) scientific name is polyamide fiber, which quickly shrinks and melts into a white gel when it is near the flame. It melts and burns in the flame, drips and foams. Celery flavor, light brown molten material is not easy to grind after cooling. 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. Nylon webbing: close to the flame and shrink, melt, drip and foam, not directly continue to burn, smell like celery, hard, round, light, brown to gray, beaded. Polyester webbing: near the flame, it melts and shrinks, melts, drips and bubbles, can continue to burn, a few have smoke, very weak sweetness, hard round, black or light brown.
3. Acrylic fiber and polypropylene fiber The scientific name of acrylic 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, exuding the bitter smell of burning meat, and the ashes after burning 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.
4. Vinylon and polyvinyl chloride are scientifically named polyvinyl formal fibers, which are not easy to ignite. They melt and shrink near the flame. When burning, there is a little flame at the top. After the fibers are melted into gelatinous flames, 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.
Post time: Jun-14-2023