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0引言农用地膜是由原材料和辅助材料按设定的比例经过熔融、塑化、混炼、压实、卷辊及裁切等一系列工艺,形成有一定厚度、宽度的农用薄膜。它的原料主要有低密度聚乙烯、增粘母料和防老化母料等,熔融温度控制在260～280℃,压实温度为20～35℃,厚度一般有6、8及10μm等规格。
0 Introduction Agricultural film is a set of raw materials and auxiliary materials according to the set ratio of melting, plasticizing, mixing, compaction, roll and cutting a series of processes to form a certain thickness, width of the agricultural film. Its raw materials are mainly low-density polyethylene, tackifier masterbatch and anti-aging masterbatch, melt temperature control at 260 ~ 280 ℃, compaction temperature of 20 ~ 35 ℃, the thickness of 6,8 and 10μm and other specifications generally.