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Polyamide fiber is a kind of earliest synthetic fibers which has been widely used in industry due to its excellent performance. Industrial yarn made by Nylon 6 has high strength, wear resistance and good elasticity. So, it has been used as tire cord, transmission belt, hoses, ropes, fishing nets and so on.Nylon 6 fiber modified by one type of aromatic compounds were prepared by one-step melt spinning process in this paper. The structure and properties of modified nylon 6 were measured by SEM, XRD, DSC and mechanical properties tester. Under the same spinning process, compared with pure nylon 6 fiber, the spinning temperature, drawing process, and mechanical properties were analyzed to identify whether it can be used as tire cord. The main contents and conclusions were shown as follows:The melt-spinning of modified nylon 6 was carried out by one-step melting spinning process in this paper.The structures and properties of fibers modified by aromatic compounds were measured by SEM, FTIR, XRD, DSC, and mechanical properties tester. SEM observations showed that the surface of fibers was different from the unmodified fibers. The aromatic rings were grafted into the polymer chain sucessfully which was confirmed through the FTIR analysis. Under the same spinning process condition, the degree of crystallization has changed in different fibers by XRD analysis. The melting point of different nylon 6 have changed, through the DSC test. Under the same spinning process conditions, through the mechanical properties test, we find that the modified nylon 6 fiber has the advantage in mechanical performance compared with unmodified nylon 6.We also studied that how spinning process influenced fiber properties. We studied how quality of nylon 6 influenced spinnability. We also discussed how spinning temperature influenced spinning compact, melt viscosity, spinnability, breaking strength. Lastly, we studied how draw ratio influenced morphology and mechanical properties of nylon 6 fibers.
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