A micro-adding device for a plastic packaging film extruder mainly comprises a motor, a reducer, a hopper, a collecting cylinder, a screw and a powder adding tube. The controller adjusts the motor speed, and the motor drives the screw to push the special starch into the powder feeding tube. The powder feeding tube passes through the extrusion die of the plastic extruder and enters the bottom of the inner wall of the packaging film to uniformly spray the powder on the packaging film. On the inner surface. The device is used in a plastic packaging film extrusion line, which can greatly enhance the opening performance of the packaging film, thereby improving the working efficiency of the subsequent process. At the same time, it also eliminates the need to add an opening agent in the production of packaging film, saving production costs.
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