Fiber identification method—combustion test method
Tag:
FiberPolyester Vinyl Acrylic Nylon
The combustion method is a quick and easy way to identify textile fibers. He differentiates fibers based on their different burning characteristics. The identification method is to take a small bundle of fibers, use tweezers to slowly approach the flame, and carefully observe the burning state of the fiber when it is close to the flame, in contact with the flame, and when it leaves the flame, as well as the smell emitted during burning and the characteristics of the residue after burning. fiber. Acetate: melts and shrinks when exposed to fire. It burns when exposed to fire and burns slowly. Although acetate fiber is also a regenerated fiber, it is a semi-synthetic fiber after acetization, so it has a pungent acetic acid smell when burned. The ash is all black, not only loose but crispy. The unburned parts turn into hard pieces. Polyester: It curls, melts and burns with smoke when burning, and the flame is yellow. It emits an aromatic smell when burned, and the ashes are in the shape of dark brown balls that can be crushed by hand. Nylon (nylon): When exposed to fire, one side melts and the other side burns slowly. There is a slight white smoke when burning, and the flame is small and blue. It smells like celery when burning. The ash is in the shape of a light brown ball and is not easy to crush. Polypropylene: shrinks when it is close to the flame and extinguishes when it is away from the fire. There is a pungent chlorine smell when burning. Ashes are amorphous black lumps. Vinyl: shrinks when burned, but burns slowly. There was little flame and black smoke. There is an aldehyde smell when burning. The ash is a brown lump that can be crushed. Acrylic fiber: melts and burns when exposed to fire, and the burning speed is very slow. The flame is white and very bright. Sometimes there is a little black smoke, accompanied by a fishy smell. Ashes are small black balls that are brittle and easily broken. It is simple and easy to use the combustion method to identify fibers, but it is difficult to judge blended products. For woven fabrics, one yarn is extracted from the warp and weft directions (that is, the straight and transverse directions) and burned separately for identification.
：Textile
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