Mono-layer blown film extrusion machine is a type of equipment used for manufacturing plastic films. This technology involves melting plastic resins, then extruding them through a die to create a thin, continuous sheet of plastic. The sheet is then inflated with air, stretched, and cooled to create a film.

The principle of extrusion is the process of forcing a material through a die or nozzle to produce a specific shape or cross-sectional profile. This is done by applying pressure to the material, typically using a screw or ram, which pushes it through the die or nozzle.