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Melt Strength of Cable Compounds and Its Effects on Extrusion Process

机译：电缆料的熔体强度及其对挤出过程的影响

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摘要

The significance of the melt strength for cable processing is addressed in this paper. The main factors, which can influence melt strength, are discussed. The comparison between branched low-density polyethylene (LDPE) and linear high-density polyethylene (HDPE) is made. Their melt strengths and of their blends were measured by using the melt tension flow method. And how to improve the quality of physically expanded foam insulation for radio-frequency (RF) coaxial cables is introduced in detail, including the selection of insulation compounds and equipments, the processing parameters and feedback control of extrusion line. Finally, we briefly summarize the processing techniques to solve some typical extrusion problems associated with poor melt strengths of flame retardant polyolefin (designated as FRPO), polyamide and HDPE.
机译：本文讨论了熔体强度对电缆加工的重要性。讨论了可能影响熔体强度的主要因素。对支化低密度聚乙烯（LDPE）和线性高密度聚乙烯（HDPE）进行了比较。通过使用熔体张力流动法测量它们的熔体强度和它们的共混物。详细介绍了如何提高射频同轴电缆物理发泡泡沫绝缘的质量，包括绝缘化合物和设备的选择，工艺参数以及挤出生产线的反馈控制。最后，我们简要概述了用于解决一些典型的挤出问题的加工技术，这些问题与阻燃聚烯烃（称为FRPO），聚酰胺和HDPE的熔体强度差有关。

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