processingdetails

Pultrusion

Pultrusion is a manufacturing process that produces reinforced plastic shapes with constant cross-sections. The composite material is reinforced by pulling fibers through a liquid resin mixture. The finished product has exceptional strength to weight properties and corrosion resistance.

Pultrusion is a continuous process of manufacturing of composite materials with constant cross-section whereby reinforced fibers are pulled through a resin, possibly followed by a separate preforming system, and into a heated die, where the resin undergoes polymerization. Many resin types may be used in pultrusion including polyester, polyurethane, vinylester and epoxy.

But the technology isn't limited to thermosetting resins. More recently, pultrusion has also been successfully used with thermoplastic matrices such as polybutylene terephthalate (PBT) either by powder impregnation of the glass fiber or by surrounding it with sheet material of the thermoplastic matrix which is then molten up.