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多层共挤复合膜(以下简称多层共挤膜)是一种采用共挤出工艺生产的复合膜,即使用二台以上挤出机,以多种不同性能特点的塑料原料熔融后,经可控的分配流道,进入自动模头挤出,冷却后制成的多层复合膜。复合层数可以是二——三层到五——七层,甚至更多层。多层共挤复合膜能够充分利用各种不同性能的塑料原料,根据需要进行合理组合,从而提高复合膜和片材的整体性能,它不仅具有优良的物理机械性能,而且阻隔性好,透气透湿率低;耐热,耐低温;保鲜,保香;无毒,无味,耐油脂等,适应性广而又灵活,用它包装的食品、药品、饮料等具有较长的保鲜、保质寿命和货架寿命,适用于较长保存期的中、高档商品的包装。
Multi-layer co-extruded composite film (hereinafter referred to as multi-layer co-extruded film) is a co-extrusion process using the composite film, that is, using more than two extruders, with a variety of different performance characteristics of plastic raw materials after melting, Controllable distribution of flow channels into the automatic die extrusion, cooling made of multi-layer composite membrane. Composite layers can be two - three to five - seven, even more layers. Multi-layer co-extruded composite film can take full advantage of a variety of different properties of plastic raw materials, according to the needs of a reasonable combination to improve the overall performance of composite films and sheets, it not only has excellent physical and mechanical properties, and good barrier, breathable Low humidity, heat-resistant, low-temperature-resistant; fresh, Paul Hong; non-toxic, tasteless, greasy and so on, adaptable and flexible, with its packaging of food, medicines, beverages, etc. have a longer shelf life and shelf life Shelf life, for a longer shelf life of medium and high-end product packaging.