Contact with a flame fiber melting, burning

Polylactic acid fiber as compared with the ordinary fibers, the identification of the fibers resembles many features, the microscope test method, the transverse cross-section and longitudinal section confusing features and synthetic, can be clearly separately.
In the burning test method, the combustion performance and the condition also has similarities with synthetic fibers, the difference is lighter in color residues, but this phenomenon is not very clear representation, not alone confirm whether this method is a polylactic acid fiber .Calcium lactate and copolymers thereof can be used spinning solution spinning and melt spinning process, mainly by dry spinning - heat drawing process, and dry mechanical properties of spun fibers is superior to melt spun fibers. Studies have shown that the molecular weight of polylactic acid and its distribution, composition and concentration of the spinning solution, the stretching temperature,lactic acid powder and a polylactic acid fiber diameter, all influence the final properties of the fibers are thermoplastic polymers of polylactic acid, and the obtained fiber properties reducing the melt spinning before the end of the polylactic acid-OH group is not used for acetylation of acetic anhydride and pyridine, was found to improve the thermal stability, the spinning temperature lower than 200 ℃, polylactic acid substantially no thermal degradation .