V

Vacuuming must take into account that the film has enough space to lie against the product everywhere, without spans. At the location of a span, resin will accumulate, resulting in increased weight and a worse laminate.

A laminate is placed dry in the mould and sealed with a vacuum bag. This bag is vacuumed and resin is drawn into the bag through a supply hose. In this way, the laminate fills absolutely bubble-free and without excess resin. The fibre-resin ratio is therefore very high. As the resin is not processed in the open air, the emission of harmful fumes is kept to a minimum.

Also called RTM or Light RTM in the composites industry. In this process, fibres are impregnated with resin in a combination of vacuum and pressure in a closed mould.

A process in which the resin flows into the fibres by means of vacuum pressure, see also infusion or vacuum pressure technique.

A hand laminate contains an amount of excess resin and air, which can be removed by applying a vacuum bag. Air pressure pushes on the bag, compressing the laminate and allowing the excess resin to flow into a bleed mat. This also removes air bubbles from the laminate.