01 – What is Pultrusion?

Pultrusion is a continuous low pressured moulding process using fibre reinforcements and thermosetting resin matrices. The fibreglass reinforcements are drawn through a resin bath or injected with resin so that all fibres are thoroughly impregnated with the liquid resin system. The wet-out fibre is then formed to the desired geometric shape and pulled through a heated steel die. Once inside the die the resin cure is initiated by continuous rolling at precise elevated temperatures. The fibreglass solidifies into the exact shape of the die, as it is continuously “pulled” by the Pultrusion machine. Thus, the name – Pultrusion

02 – Can we see through fibreglass?

No, these profiles are composed of glass fibres held together by a polymeric matrix of thermosetting resin and additives.  All these composites produce an opaque framing structure that does not allow us to see through it. Fibreglass is not a type of glass. 

03 – Can this material be exposed to the sun, UV rays and very high temperatures, such as in deserts? At what temperature does it melt?

Yes, the material can be exposed to the sun. It passes through a special production process to help to make it resistant to UV light. The material is also painted with special, high-performing paint that gives it a long life.

The P320-400 resin that we use is based on thermoset polyester chemistry so it does not melt after it is properly cured. The upper use temperature of P320-400 is about 240F – circa 115ºC.

04 – Does burning the fibreglass profiles release any malign chemicals?

BOAVISTA windows pultruded profiles have low toxicity values due to the absence of halogens.

05 – How strong can pultruded profiles be?

The Tensile strength of pultruded profiles is of 200 to 300 MPa.

06 – Can pultruded parts be painted?

Yes they can! They can be coated to any RAL colour.