23/01/2025
About Qingya Paper 12 Methods for Fiber Identification (3) --- Melting Point Method user manual | Qingya Paper
12 Methods for Fiber Identification (3) --- Melting Point Method:
Different melting points of various chemical fibers can also be used for fiber identification. For example, the melting points of nylon 6 and nylon 66 are different, with the former being 216°C and the latter 244°C. The melting point of chemical fibers can be determined by observing the temperature at which the fibers lose birefringence under a polarized light microscope equipped with a heated stage and thermometer. The melting point method is suitable for identifying certain synthetic fibers that have a distinct melting point.