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AN IMPROVED PURGING COMPOUND FOR POLYAMIDES AND ETHYLENE VINYL ALCOHOL COPOLYMERS

机译：聚酰胺和乙烯-乙烯基醇共聚物的改进的填料

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This paper discusses the development of a new purge compound, PlexarTM PX 909, produced by Quantum Chemical Company. The compound is designed to remove residual polyamides and EVOH and can also be used to purge other polar compounds such as oxidized polyethylenes or color concentrates adhered to the internal parts of the extruder. Several characterization techniques were used to compare the purging efficiency of PX 909 to other commercial purge products and to low density polyethylene (LDPE). These techniques include Fourier Transform Infrared spectroscopy (FTTR), INTEC gel analysis technique and optical microscopy. The FTIR technique was used to determine quantitatively the amount of residue (nylon or EVOH) purged versus time and the total nylon concentration removed at the end of purging. The INTEC technique was used to determine the amount and the size of gel particles in a LDPE film extruded after cleaning the extruder. The optical microscopy measurements were used to determine the compatibility of the purge compound with nylon or EVOH remaining in the extruder. It was concluded that PX 909 is at least twice as efficient in purging nylon or EVOH from extruders compared to LDPE and other commercial purging compounds. The high purging efficiency of PX 909 was attributed to its ability to chemically react with residual polar compounds remaining in the extruder.
机译：本文讨论了由Quantum Chemical Company生产的新型吹扫化合物PlexarTM PX 909的开发。该化合物设计用于去除残留的聚酰胺和EVOH，也可用于清除粘附在挤出机内部的其他极性化合物，例如氧化聚乙烯或色母料。使用了几种表征技术来比较PX 909与其他商用吹扫产品和低密度聚乙烯（LDPE）的吹扫效率。这些技术包括傅里叶变换红外光谱（FTTR），INTEC凝胶分析技术和光学显微镜。 FTIR技术用于定量确定吹扫后的残留物（尼龙或EVOH）量与时间的关系，以及吹扫结束时除去的总尼龙浓度。使用INTEC技术确定清洗挤出机后挤出的LDPE薄膜中凝胶颗粒的数量和大小。光学显微镜测量用于确定吹扫化合物与挤出机中残留的尼龙或EVOH的相容性。结论是，与LDPE和其他商用吹扫化合物相比，PX 909从挤出机吹扫尼龙或EVOH的效率至少两倍。 PX 909的高吹扫效率归因于其与挤出机中残留的残留极性化合物发生化学反应的能力。

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