Plastic Film Extrusion Production Technology

Drying, proportioning, mixing, feeding in a vacuum hopper, extruding a filter screen, casting cooling in a die head, corona treatment in a thickness gauge, trimming and pulling, flattening, removing static electricity and rolling.

Production Process of Plastic Film Extrusion Tape Casting

Plastic film extrusion line is easy to be large-scale, high-speed and automatic. The transparency of the produced film is better than that of the blown film, the thickness accuracy is improved, the uniformity of the film is good, and the strength is also 20%-30% higher. There are many kinds of raw materials used in the plastic film making machine, and the molding thickness ranges from 8 to 8~300 um. Therefore, there are strict requirements for the purity, uniformity, additives and stabilizers of the raw materials used, and the selection of high-quality and stable raw materials is also a very important condition.

Extruded Plastic Film Production Raw Materials

Therefore, before producing plastic film, the first job is to select raw materials, and carefully analyze and determine whether the basic characteristics of various materials meet the requirements. It must be based on the performance indexes of extruded products, and the use environment, use methods and functions of the products should be fully understood, so as to select resins and additives and design reasonable formulas.

The feeding system of plastic film extrusion machine is composed of raw material proportioning, mixing, drying, conveying and storage devices, etc. Its function is to feed the extruder in time in strict accordance with the raw material proportioning requirements, so as to make the extruder produce continuously and smoothly.

In order to ensure the quality of plastic film extrusion casting and the physical and mechanical properties of products, it is necessary to accurately measure the amount of various raw materials. For high-quality casting films (such as multi-layer, mixed extrusion of various raw materials, etc.), a high-precision vector weighing system should be equipped.

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