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Standard Reliable Quality Blown Film Extrusion Plant

Standard Reliable Quality Blown Film Extrusion Plant
Standard Reliable Quality Blown Film Extrusion Plant
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Product Code : MLBM-10
Brand Name : OEPL
Price And Quantity
  • Minimum Order Quantity
  • 1
  • Unit of Measure
  • Ton/Tons
Product Specifications
  • Type
  • Packaging Line
  • Material
  • LD,PP,HD,HM,PU,PVC
  • Computerized
  • Yes
  • Automatic Grade
  • Automatic
  • Control System
  • PLC Control
  • Drive Type
  • Electric
  • Color
  • White & Blue
Product Description

Standard Reliable Quality Blown Film Extrusion Plant

Extrusion coating is using a blown or cast film process to coat an additional layer onto an existing rollstock of paper, foil or film. For example, this process can be used to improve the characteristics of paper by coating it with polyethylene to make it more resistant to water. The extruded layer can also be used as an adhesive to bring two other materials together. Tetrapak is a commercial example of this process.

Standard Reliable Quality Blown Film Extrusion Plant

One of the most common methods of film manufacture is Blown Film (also referred to as the Tubular Film) Extrusion. The process involves extrusion of a plastic through a circular die, followed by "bubble-like" expansion. The principal advantages of manufacturing film by this process include the ability to:

  • Produce tubing (both flat and gussetted) in a single operation

  • Regulation of film width and thichness by control of the volume of air in the bubble, the output of the extruder and the speed of the haul-off

  • Eliminate end effects such as edge bead trim and non uniform temperature that can result from flat die film extrusion

  • Capability of biaxial orientation (allowing uniformity of mechanical properties)

  • Blown Film Extrusion can be used for the manufacture of co-extruded, multi-layer films for high barrier applications such as food packaging.


Standard Reliable Quality Blown Film Extrusion Plant
The Process: Plastic melt is extruded through an annular slit die, usually vertically, to form a thin walled tube. Air is introduced via a hole in the centre of the die to blow up the tube like a balloon. Mounted on top of the die, a high-speed air ring blows onto the hot film to cool it. The tube of film then continues upwards, continually cooling, until it passes through nip rolls where the tube is flattened to create what is known as a ' lay-flat' tube of film. This lay-flat or collapsed tube is then taken back down the extrusion ' tower' via more rollers. On higher output lines, the air inside the bubble is also exchanged. This is known as IBS (Internal Bubble Cooling).

The lay-flat film is then either kept as such or the edges of the lay-flat are slit off to produce two flat film sheets and wound up onto reels. If kept as lay-flat, the tube of film is made into bags by sealing across the width of film and cutting or perforating to make each bag. This is done either in line with the blown film process or at a later stage.

Typically, the expansion ratio between die and blown tube of film would be 1.5 to 4 times the die diameter. The drawdown between the melt wall thickness and the cooled film thickness occurs in both radial and longitudinal directions and is easily controlled by changing the volume of air inside the bubble and by altering the haul off speed. This gives blown film a better balance of properties than traditional cast or extruded film which is drawn down along the extrusion direction only.
Standard Reliable Quality Blown Film Extrusion Plant

Trade Information
  • Delivery Time
  • 3 Months
  • Main Domestic Market
  • All India

OCEAN EXTRUSIONS PVT LTD.
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