What is Sheet Extrusion?

• Sheet Extrusion is a technique for making flat plastics sheets from a variety of resins
• Molten resin is continuously extruded in a flat form through a die, then nipped by polishing rolls for cooling and shaping to form a flat sheet
• The flat sheet is pulled by a haul-off system and is wound up to for a sheet roll

HIPF Course Description

Course Objective

At the end of this course, the trainees will have acquired basic knowledge and skills important to the operations of a Multilayer Sheet Extrusion Plant

Course Outline

1. Introduction to Safety
   General Instructions; Protective Devices; Emergency Stops; Pictograms for Safety and Information; Dangerous Spots in Sheet Extrusion Line
2. Introduction to Sheet Extrusion
   Definition of Sheet; Presentation of Sheet Rolls and Products from Sheets; Sheet Extrusion Principle and Techniques; Sheet Extrusion Process and Functions
3. Introduction to Multilayer Co-extrusion
   Definition of Multilayer Co-extrusion; Methods for Multilayer Co-extrusion
4. Introduction to Commodity Plastics
   Definition of Terms; Kinds of Commodity Plastics; History of Commodity Plastics; Polymerization Process; Sample Technical Data; Parameters and Application
5. Machine Startup & Shutdown Procedure
   Proper Startup and Shutdown Procedures; Familiarization with the Control Buttons; Safety Measures
6. Line Operations and Product Quality Check
   Parameter Adjustment; Quality Check – Online and Product Thickness, Appearance of Sheet, Product Width and Layer Thickness Using Polarizing Microscope
7. Practice Operations

• Machine Startup and Shutdown Operations
• Parameter Adjustments
• Quality Check – Online Sheet and Product Sheet
• Run 0.65 mm Polystyrene Multilayer Sheet
• Run 1.00 mm Polypropylene Multilayer Sheet
• Definition of Sheet; Presentation of Sheet Rolls and Products from Sheets; Sheet Extrusion Principle and Techniques; Sheet Extrusion Process and Functions

1. Introduction to Multilayer Co-extrusion
   Definition of Multilayer Co-extrusion; Methods for Multilayer Co-extrusion
2. Introduction to Commodity Plastics
   Definition of Terms; Kinds of Commodity Plastics; History of Commodity Plastics; Polymerization Process; Sample Technical Data; Parameters and Application
3. Machine Startup & Shutdown Procedure
   Proper Startup and Shutdown Procedures; Familiarization with the Control Buttons; Safety Measures
4. Line Operations and Product Quality Check
   Parameter Adjustment; Quality Check – Online and Product Thickness, Appearance of Sheet, Product Width and Layer Thickness Using Polarizing Microscope
5. Practice Operations

• Machine Startup and Shutdown Operations
• Parameter Adjustments
• Quality Check – Online Sheet and Product Sheet
• Run 0.65 mm Polystyrene Multilayer Sheet
• Run 1.00 mm Polypropylene Multilayer Sheet