Single-layer blown film machine with a multi-layer blown film machine difference

Is a single-layer blown film machine blown film extrusion die, the general production of film for ordinary common plastic packaging materials look to be, there is PE film blowing machine, PP film blowing machine, PVC film blowing machine. Multi-layer co-extruded blown film machine is a different ratio of raw materials through multiple simultaneous extrusion die made of composite films are generally used for high-end product packaging, this film because of its good barrier properties, preservation, moisture, frost, separated oxygen, oil, can be used in light and heavy packaging. For example fresh fruits, meat, pickles, fresh milk, drink, medicine and other supplies. The cost of such equipment is relatively large, blown film machine choose depends on the requirements of a given product, such as do not understand can consult professional manufacturers.
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