【作者】 周豪；

【导师】 宗成中；

【作者基本信息】 青岛科技大学 ， 材料工程， 2007， 硕士

【摘要】 流延法是利用热塑性材料生产塑料薄膜的方法之一。聚丙烯流延膜(CPP)是塑料工业中一种未拉伸的平模挤出聚丙烯(CPP)薄膜，与聚丙烯双向拉伸薄膜(BOPP)、OPP、吹胀膜(IPP)共同作为聚丙烯包装薄膜的三大品种，广泛应用于食品、纺织品、日用品的包装。CPP的产品类型主要有金属化(镀铝)型、普通复合型、蒸煮型、特殊用途类等，多采用多层复合共挤方式。多层复合共挤流延膜一般可分为热封层、支撑层，电晕层三层，其中热封层、电晕层采用无规共聚聚丙烯树脂为原料。本文针对无规共聚聚丙烯流延膜热封层专用料的工业化开发与规模化生产所涉及的多方面因素进行了探讨研究，通过对国内外同类原料进行剖析比较，确定了共聚合工艺中乙烯的加入量、MFR等关键控制指标；对聚丙烯无规共聚工艺进行深入的研究，评价、筛选了适宜的催化剂体系，对影响装置长周期运行的因素进行了摸索，避免因环管易堵所导致的装置停工；并针对专用料添加剂体系结合产品的应用性能要求进行了设计和优化。通过本文所开展的研究工作，为专用料的工程化开发提供了指导，并成功实现了专用料的工业规模化开发。更多还原

【Abstract】 Cast is a method of preparing plastic films with thermoplasticmaterials. Cast polypropylene (CPP) film is of a kind of thin film extrudedfrom flat mold in the plastics industry. The PP packing films such asCPP, BOPP, OPP and IPP are widely used in the packings of the food, textileproduct and daily necessity.The types of CPP products mainly includes plating(aluminum)type, common type, steam to cooking type, special use etc., much adoptionmany layer compound total crowded way, cast film can is divided into heatsealing layer, propup layer, electricity dizzy layer, among them heatsealing layer, electricity dizzy layer adoption random propylene-ethylenecopolymer as raw material.The factors of industrial development and scaled production of CPPare discussed in this paper. By analyzing and comparing the raw materialsof domestic and overseas, the crucial index such as the dosage of ethylenein copolymerization technics and MFR are confirmed. To polypropylenepolyaddtion to carry on thorough of research, evaluating catalyzersystem, limit factors that affect stable long term safe running of theco-polymerization unit and relevant solutions has been research, avoidbecause of loop reactor easy cause of equip cease work; according to thedemand of cast film combine to appropriation anticipate additive systemto carried on a design with excellent turn.The industrialization passing the research of this work, the characterparameter and production technics condition are confirmed, and the specialresin was successfully industrializing developed.更多还原