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Pultrusion Process

The Pultrusion Process is used to create composite materials consisting of a reinforcing material encased in a synthetic resin. Pultruded sections are used to replace metals in many applications because composites are light, strong, non-corroding and need little maintenance.

The pultrusion process involves pulling fibre or mat reinforcing material through a series of processing stages that include:

  • a resin tank that impregnates the fibres with resin
  • preforming guides that give the composite its initial shape
  • heated dies that shape and cure the resin / reinforcement mixture 
  • a cutting stage where the continuous rod of fully cured composite is cooled and cut into designated lengths by a circular saw or bandsaw.


Fibre reinforced plastic (FRP) composites are used to replace metals in many applications including:

  • rods and poles
    • gardening tool handles
    • broom handles
    • plant supporting poles
    • fence poles and posts
    • flag poles
    • lamp posts
    • tent poles
    • poles for sports
  • electric conduit and sheathing
  • rails and fences
  • construction industry applications, e.g. bridges, walkways, tanks and decks

and many others where a structural section is required.

Pultruded composite structural sections
Click here to view the PDF version of this resource. Pulrusion PDF Pultrusion PDF
Copyright Laszlo Lipot.