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Production of polypropylene melt blown nonwoven fabrics: Part I-Numerical simulation and prediction of fibre diameter

机译:聚丙烯熔喷无纺布的生产:第一部分-纤维直径的数值模拟和预测

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摘要

The air drawing model and the air jet flow field model of dual slot inset sharp die of melt blowing for polypropylene polymer nonwovens have been established. The dual slot inset sharp die is often used to yield polymer fibres in the melt blowing process. The air jet flow field model of melt blowing is solved by using the finite difference method. The numerical computation results of air speed distribution are found to be in accordance with the experimental values. The influence of melt blowing processing parameters on the fibre diameter is also discussed. The predicted fibre diameter agrees with the experimental data. A lower polymer throughput rate, higher initial polymer melt temperature, larger die-to-collector distance, higher air initial temperature, and higher air initial velocity can yield finer fibres. The results show great potential of this research for the computer assisted design of melt blowing technology.
机译:建立了聚丙烯聚合物非织造布双缝嵌缝尖锐模头的抽气模型和喷气流场模型。通常在熔喷工艺中使用双缝隙插入的尖锐模头来生产聚合物纤维。采用有限差分法求解了熔喷的空气流场模型。发现风速分布的数值计算结果与实验值一致。还讨论了熔喷工艺参数对纤维直径的影响。预测的纤维直径与实验数据一致。较低的聚合物通过量,较高的初始聚合物熔体温度,较大的模头到收集器的距离,较高的空气初始温度和较高的空气初始速度可以产生更细的纤维。结果表明该研究对于熔喷技术的计算机辅助设计具有巨大的潜力。

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