Structure and Properties of Regenerated Parallel Composite Hollow Polyester Staple Fiber
In order to recycling and reuse waste polyester and reduce the environmental and resource pres-sure,the parallel composite hollow polyester staple fiber with high and low viscosity was prepared using polyester bottle chips and foam as raw materials.Optical microscopy,field emission scanning electron micro-scope,differential scanning calorimetry(DSC),and two-dimensional wide-angle X-ray diffraction were used for testing and analysis.The results show that the hollowness of sample 1 with small intrinsic viscosity differ-ence is about 15.5%,and the hollowness of sample 2 with large viscosity difference is about 18.6%.The larg-er the viscosity difference,the larger the hollowness.The bulkiness V2 of sample 2 is about 57.8 cm3/g,and the compressive elastic recovery rate is about 80.0%.The bulkiness V2 of sample 1 is about 34.0 cm3/g,and the compressive elastic recovery rate is about 69.0%.The thermal performance of sample 2 is better than that of sample 1.When the areal density is 100 g/m2,the thermal value is about 5.47 clo,while the thermal value of sample 1 is 3.95 clo.The crystallinity obtained by DSC and the two-dimensional wide-angle X-ray diffraction spectrum and the one-dimensional integral X-ray diffraction spectrum show that there is no significant difference in the crystallization properties of the two parallel composite fibers.The results of half-peak width calculation show that the orientation degree of sample 1 is slightly higher than that of sam-ple 2.The research results provide a reference for the recycling of waste polyester to develop and produce high value-added differentiated fibers.
waste polyesterhigh and low viscosityparallel composite staple fiberrecycling
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