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首页> 外文期刊>Journal of Applied Polymer Science >Polymer distribution during bicomponent melt blowing of poly(propylene)/poly(ethylene terephthalate) and its improvement
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Polymer distribution during bicomponent melt blowing of poly(propylene)/poly(ethylene terephthalate) and its improvement

机译：聚丙烯/聚对苯二甲酸乙二醇酯双组分熔喷过程中的聚合物分布及其改进

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摘要

Bicomponent melt blown (MB) microfiber nonwovens of poly(propylene) (PP) and poly(ethylene terephthalate) (PET) were produced in this study. It is interesting to analyze the polymer distribution uniformity across the web because it affects many end-use properties. By utilizing the technique of differential scanning calorimetry (DSC), a standard working line between heat of fusion and weight percentage was constructed for mixtures of PP and PET components. The fitted equations were used for determination of a component percentage in a certain position across the MB web. Measurements were conducted from DSC re-heating curves to achieve accurate results. The distribution of polymer varies with polymer mass ratio and processing conditions. The overall uniformity increased with the percentage of PP. When PP is the minor component in the polymer pair, it exhibits notably higher percentage in edge areas across the MB web. These results suggest the phase interface distortion of the polymer melt occurred at the entrance of the MB coat-hanger die tip. The polymer distribution uniformity is improved by adjusting temperature profile of the MB die. (C) 2002 Wiley Periodicals, Inc. [References: 7]
机译：在这项研究中，生产了聚丙烯（PP）和聚对苯二甲酸乙二醇酯（PET）的双组分熔喷（MB）超细纤维非织造布。分析聚合物在纤维网上的分布均匀性很有趣，因为它会影响许多最终使用性能。通过使用差示扫描量热法（DSC），为PP和PET组分的混合物建立了熔化热和重量百分比之间的标准工作线。拟合方程用于确定整个MB纤维网中某个位置的组分百分比。根据DSC再加热曲线进行测量以获得准确的结果。聚合物的分布随聚合物质量比和加工条件而变化。总体均匀度随PP的百分比而增加。当PP是聚合物对中的次要组分时，它在MB纤维网的边缘区域中表现出明显更高的百分比。这些结果表明，聚合物熔体的相界面变形发生在MB涂层衣架模头尖端的入口。通过调节MB模具的温度曲线可以改善聚合物分布的均匀性。 （C）2002 Wiley Periodicals，Inc. [参考：7]

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