Combustion method to identify fibers
Identification of fiber by combustion method
Acetate: melts and shrinks when near fire. It burns immediately when exposed to fire and burns slowly. Although acetate fiber is also a regenerated cellulose fiber, it has become a semi-synthetic fiber after acetic esterification, so it has a pungent acetic acid smell when burned. The ash is black and not only loose but brittle. The unburned parts turn into hard pieces.
Polyester: curls, melts and burns with smoke when burning, the flame is yellow. It emits an aromatic smell when burned, and the ashes are in the shape of dark brown glass balls that can be crushed by hand.
Nylon (nylon): One side melts when exposed to fire, and the other side burns slowly. There is no smoke or slight white smoke when burning, and the flame is small and blue. It smells like celery when burning. The ashes are in the shape of light brown glass spheres and are not easily broken.
Polypropylene: shrinks quickly 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.
Vinylon: shrinks quickly when burned, but burns slowly. There was little flame and black smoke. There is an aldehyde smell when burning. Ashes are brown amorphous hard lumps 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 and a fishy smell. Ashes are small hard black balls that are brittle and brittle.
It is simple and easy to identify fibers by combustion method, but it is difficult to judge blended products. For interwoven fabrics, one yarn is extracted from the warp and weft directions (that is, the straight and transverse directions) and burned separately. 7qKKLt
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