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

• Principles of Blown Film Extrusion

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

• Resin Materials for Blown Film

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

• Safety Education for Blown Film Operation

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

• The Main Components of Blown Film Machine

  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

• Die and Air Ring as Major Components for Blown Film

  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

• Introduction to the Blown Film Extrusion Machine

  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

• Operating Skills for Blown Film Extrusion Technology

  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

• Die Dismantling, Cleaning and Mounting

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

• Blown Film Extrusion Troubleshooting

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

• Common Secondary Film Processing Methods

  Printing; Bag Making Process; Scrap Recycling

• Quality Control of Blown Film

  Quality Check for Blown Film; Production Recording; How To Report the Result of Manufacturing
• Practice Plant Operations