The relationship between the different fineness,cross-section,color of polylactic acid fibers and spinneret,pump supply,spinning temperature and drafting multiple in the production process were estab-lished by regulating the production process parameters of polylactic acid fiber,and the morphology and strength of the fibers were characterized.The results showed that in the spinning process of differentiated polylactic acid fiber,the change of fiber fineness would cause the changes of process parameters and physi-cal properties.Under the same fineness,the pump supply and drafting multiple of special-shaped fiber were lower than that of conventional fiber,while the spinning temperature was higher than it.Compared with natural polylactic acid fiber,the process parameters and performance of colored polylactic acid had no significant changes.
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