ALLIED COMPANIES
What is Blown Film Extrusion?



  • Blown Film Extrusion is one of the most common polymer conversion processes in the world
  • Film is made by extruding molten plastic through a circular die, forming an inflated tubular bubble that moves through a cage as it cools, that is then collapsed and formed into rolls
  • The typical film blowing process consists of a series of stages, including extrusion, blowing, collapsing, and winding
HIPF Course Description


Course Objective

At the end of the course, the trainees will be able to:
  • Develop a working knowledge of and learn how to operate a Blown Film Extrusion machine
  • Understand the basics of blown film technology, the common material used, and some common problem solving situations
  • Analyze and solve practical blown film problems
  • Develop a working knowledge on maintaining a blown film machine
Course Outline
  1. Principles of Blown Film Extrusion

    2. Definition and Principle; Product and Applications; Film Fabrication Process; Types of Blown Film Machines

  2. Resin Materials for Blown Film

    3. Raw Materials Use for Blown Film Extrusion; Three Common Polyethylene Grades Used for Blown Film; Suitable Grade index for Blown Film

  3. Safety Education for Blown Film Operation

    4. Safety Guideline and SOP; Personal Protective Equipment (PPE); Safety Devices; Warning Signs; Safety Rules for Operation; Safety Instructions on Operation

  4. The Main Components of Blown Film Machine

    5. The Extruder; The Die Head and Die; The Bubble Cooling System; Bubble Stabilizer; The Take-Off System/Pinch or Nip Rolls; The Wind-Up System; Corona Treatment

  5. Die and Air Ring as Major Components for Blown Film

    6. Kinds of Die for Blown Film; Details of Die and How It Works; Details of Air Ring and How It Works; Die and Air Ring Care and Maintenance

  6. Introduction to the Blown Film Extrusion Machine

    7. BFE Process Flow; Start-Up of Blown Film Line; Quality Control for Blown Film; Scheduled Shut-Down of Blown Film Line; Emergency Shut-Down of Blown Film Line; Switching On After Emergency Stop

  7. Operating Skills for Blown Film Extrusion Technology

    8. Checking of Machine Conditions Before Operation; Winder Preparations; Film Guide Set-Up and Importance; Blown Film Run Preparations; Die Checking and Adjustments; Parameter Setting-Up; Switching On After Emergency Stop; Changing Die; Changing Materials and Filling Procedures

  8. Die Dismantling, Cleaning and Mounting

    9. Die Dismantling Procedure; Die Cleaning and Care; Understand Die Assembly and Mounting

  9. Blown Film Extrusion Troubleshooting

    10. Types of Trouble of Blown Film Process; Unstable Bubble; Film Appearance; Machine Malfunction

  10. Common Secondary Film Processing Methods

    11. Printing; Bag Making Process; Scrap Recycling

  11. Quality Control of Blown Film

    12. Quality Check for Blown Film; Production Recording; How To Report the Result of Manufacturing

  12. Practice Plant Operations


Click to view the Blown Film Extrusion Workbook
Blown Film Extrusion Workshop Gallery