Fiberglass pultrusion process

What is Pultrusion?

Pultrusion is a manufacturing technology that continuously producing composite profiles. The begins with untwisted glass fiber rovings impregnate fully with reinforced materials (e.g. polyester). Then it comes to go through the certain cross-sectional shape mold and curing occurs straightly out of the mold.

For fiberglass profiles which have a certain cross section, the pultrusion process has its obvious advantages. Firstly, since the pultrusion process is an automated continuous production process, compared with other techniques, it has the highest production efficiency. Secondly, utilization of raw materials on pultrusion products is the highest, generally, the utilization can reach to 95%. Most importantly, pultruded products have the lowest cost, excellent performance, stable quality and beautiful appearance. Due to those advantages FRP products are replacing metal, plastic, wood, ceramics and other materials, and is widely used in chemical, petroleum, construction, electricity, transportation, municipal engineering and other fields.

Pultrusion Process:

Reinforcements ( glass fiber rovings , continuous fiberglass mat and fiberglass surface mat , etc.) in the role of pultrusion equipment traction after resin bath fully impregnated, by a series of pre- formed template guidance, preliminary stereotypes , and finally into the heated mold, mold under the action of high-temperature curing reaction, which can produce continuous, smooth surface, dimensional stability, high strength glass fiber reinforced plastic profiles.

Typical pultrusion process:

Fiberglass roving & continues mat – Saturate with resin in the resin bath – Preforming system – Pultrusion and curing die – Pulling system – Cut off saw – Products

Fiberglass pultrusion process