Polyester fiber production using virgin and recycled PET
Polyester fiber production using virgin and recycled PET
复制标题
使用原生和再生 PET 生产聚酯纤维
作者：
J. Tapia;J. G. Luna;A. García;R. González‐Núñez;A. Bonilla;A. Alvarez
在这项研究中，设计和建造了一种带有纺丝装置的挤出设备，用于以未加工和回收的聚对苯二甲酸乙二酯(PET)为原料生产聚酯纤维。分析了几个操作参数(即压力、温度、进料流量、挤出速度和挤出机设计)，以确定最佳工艺条件。特别是，这项研究着重于详细分析用于涤纶纺织纤维应用的再生原料的加工过程，考虑到工艺的可变性，并确定替代方案，以将对纤维直径和机械规格等质量参数的影响降至最低。将实验结果与为这些特殊情况建立的理论模型的计算值进行了比较。质量流动的数学分析表明，与实验数据有很好的一致性，其中有-lt；3%的百分比差异。研究发现，纤维直径是特性粘度(VI)或熔体流动指数(MFI)的函数。最后对纤维的力学性能进行了评价，结果表明，平均相对分子质量越高的纤维，其强度越高，杨氏模量值越低。
In this study, the design and construction of an extrusion equipment with spinning fiber devices has been developed to produce polyester fiber from virgin and recycled polyethylene terephthalate (PET). Several operating parameters (i.e., pressure, temperature, feed flow rate, extrusion speed and extruder design) have been analyzed to identify the best process conditions. In particular, this study has focused on a detailed analysis for the processing of recycled raw material for polyester textile fiber applications considering the variability of the process and identifying alternatives to minimize the impact on the quality parameters such as the fiber diameter and mechanical specifications. The experimental results were compared with the values calculated using a theoretical model, which has been developed for these particular cases. The mathematical analysis of the mass flow showed a very good agreement with respect to the experimental data, where there was a percentage difference < 3 %. It was found that the fiber diameter is a function of intrinsic viscosity (VI) or melt flow index (MFI). Finally, the mechanical properties of the fibers were evaluated and results indicated that the fiber with higher average molecular weight showed higher tenacity and lower Young’s modulus values.