Two Layer Blown Film Plant

Blown Film Plant is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polumer through a die and inflating to several times its initial diameter to form a thin film bubble.The blown film process is used to produce a wide variety of products, ranging from simple monolayer films for bags to very complex multilayer structures used in food packaging. Multilayer film structures may be made by blown film coextrusion and combines two or more molten polymer layers.The blow up ratio is simply the ratio of the final diameter of the tube relative to the die diameter. The amount the film is oriented in the machine direction is controlled by the draw down ratio (DDR), which is simply the ratio of the thickness of the extrudate exiting the die to the final film gauge.