Influence of Processing Conditions On the Peel Behavior of Polyethylene/ Polybutene-1 Peel Systems
Influence of Processing Conditions On the Peel Behavior of Polyethylene/ Polybutene-1 Peel Systems
复制标题
加工条件对聚乙烯/聚丁烯-1 剥离体系剥离行为的影响
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
W. Grellmann
中科院分区：
文献类型：
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作者：
M. Nase;B. Langer;W. Grellmann
研究了一种特殊的剥离体系低密度聚乙烯/等规聚丁烯-1（PE-LD/iPB-1），该体系常用于保护性包装。打开包装所需的剥离力取决于iPB-1的含量和吹塑工艺的加工条件。商业产品具有恒定量的iPB-1。因此，可以通过改变处理条件来调节限定的剥离力。根据加工条件研究具有6重量% iPB-1的标准剥离系统PE-LD。改变加工线的最重要的加工参数（挤出机、模头、管成形区域），并检查它们对剥离性能的影响。例如，研究了挤出机内熔体的温度、模头内模隙的尺寸以及膜泡的冷却行为。挤出机内较高的熔体温度降低了剥离力。调查还显示，剥离力的模具间隙的大小和冷却的程度上的强烈依赖。采用新发展的凝固时间参数来表征合金的冷却行为。
The specific peel system low-density polyethylene/isotactic polybutene-1 (PE-LD/iPB-1), which is often used for protective packages, was investigated in this study. The required peel force to open the package depends on the content of iPB-1 and on the processing conditions of the blowing process. Commercial products have a constant amount of iPB-1. Thus, a defined peel force can be adjusted by varying the processing conditions. The standard peel system PE-LD with 6 wt% iPB-1 was investigated in dependence on the processing conditions. The most important processing parameters of the processing line (extruder, die head, tube forming area) were varied and their influence on the peel properties was examined. For example the temperatures of the melt within the extruder, the size of the die gap within the die head, and the cooling behavior of the film bubble were investigated. Higher melt temperatures within the extruder decreased the peel force. The investigations also revealed a strong dependence of the peel force on the size of the die gap and on the degree of cooling. The new developed parameter time of solidification was used to characterize the cooling behavior.