Blown Film Machine

A blown film machine is used to produce plastic film through a process called blown film extrusion. This machine melts plastic resin pellets and extrudes them through a circular die, inflating the resin into a bubble shape. The bubble is then cooled and flattened to form a continuous sheet or tube of plastic film.

Blown film machines operate by feeding plastic resin pellets into an extruder barrel where they are melted and forced through a circular die. Air is introduced into the center of the die to inflate the molten resin into a bubble. As the bubble expands, it is cooled by air or water to solidify the plastic film. The film is then collapsed, flattened, and wound onto rolls.

Blown film machines can produce a variety of plastic films including: LDPE (Low-Density Polyethylene) film: Commonly used for packaging applications like bags and wraps. HDPE (High-Density Polyethylene) film: Known for its strength and used in heavier duty applications such as industrial liners and sacks. LLDPE (Linear Low-Density Polyethylene) film: Offers enhanced tensile strength and puncture resistance, ideal for stretch film and agricultural films. Multi-layer films: Combining different types of resins to achieve specific properties like barrier protection or enhanced strength.