blown film extrusion

Blown film extrusion is a manufacturing process used to produce plastic film, like that in packaging or plastic bags. It involves melting plastic pellets and then extruding the molten plastic through a circular die to form a thin tube. The tube is simultaneously expanded and cooled with air to create a thin, uniform film. The film is then flattened, rolled, and cut for use. This method allows for efficient production of large quantities of high-quality, consistent plastic film suitable for various commercial applications.