近几年,国际上一些发达国家在大宗货物运输中,采用塑料缠绕拉伸回缩薄膜取代热收缩薄膜和其他各塑料薄膜作为运输包装材料已成为1种新的发展趋势。这种薄膜是以线型低密度聚乙烯为主要原料,采用共挤出吹膜法或流延法生产的1种运输包装材料和保鲜包装材料。这种薄膜 In recent years, some developed countries in the international transport of bulk goods, the use of plastic film wrapped around the shrink film instead of heat shrinkable film and other plastic film as a transport packaging material has become a new trend. This film is based on linear low-density polyethylene as the main raw material, the use of co-extrusion blown film or cast production of a transport packaging materials and preservation of packaging materials. This film