When appropriate raw materials are mixed, it is an important step in plastic bag production, namely the blowing of the bags. Extrusion, rotating plastic pellet.

The molten plastic pellets are pressed through a template. Then blow air into the air to inflate the plastic to the desired size. And it is passed through a completely smooth roller again to roll the plastic into a flat shape, preventing air from escaping from the plastic cavity. To keep the air inside constant and keep the size of the plastic bag. The workpiece obtained at this stage is flattened and curled waiting for further printing or cutting.