由于我国聚乙烯(PE)产品的质量档次普遍不高.长期主要依靠进口,2005年进口依存度高达 50%。双峰PE由高分子量和低分子量两个部分组成,不仅比单峰PE有更好的物理性能,而且还有更长的使用寿命,能够满足市场对高附加值树脂的需求,广泛应用于各种日用制品的生产,如管材、薄膜、软包装材料和吹塑中空容器等。目前我国总生产能力为69万吨/年,预计2006年的总需求量将达到150万吨,具有良好的发展前景。 As China’s polyethylene (PE) product quality is generally not high grade long-term mainly rely on imports, imports in 2005 up to 50%. Bimodal PE consists of high molecular weight and low molecular weight components, not only better than the unimodal PE physical properties, but also have a longer life, to meet the market demand for high value-added resins are widely used in Production of daily necessities, such as pipes, films, flexible packaging materials and blow-molded hollow containers. At present, China’s total production capacity of 690,000 tons / year is expected in 2006 the total demand will reach 1.5 million tons, with good prospects for development.