Co – extrusion and its benefits

When two or more materials are put through the same die to produce a single plastic extrusion the process is known as co – extrusion. Many extruders use this process due to its fantastic benefits. However, like most things there are some disadvantages evident with co – extrusion. This blog addresses the pro’s and the cons.


  • Less equipment to control and less man power as there are less steps in the process
  • Less energy required to power the machine
  • Stable process
  • Cost effective – choice of low cost materials for filling
  • Great varieties in the widths and line speeds producing first class layer extrusions
  • Multi-layer can also be produced in one process


  • Physical properties might vary and some might be unable to be combined
  • It can be difficult to ensure that different polymers have similar melt viscosities
  • Lots of planning and design is required which can be quite timely
  • In order for the process to operate it requires a sophisticated extruder which can initially be very expensive.
Posted on by Rayda Plastics | This entry was posted in Plastic Extrusion. Bookmark the permalink.

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