CANZ Glossary of Terms

moulding process for minimising emissions voids and maximising reinforcement content, forcing out entrapped air and excess resin from layups, by drawing vacuum into flexible film draped over part. Also considered “Resin Infusion”. Vacuum may be drawn after resin entry.

A process where the reinforcement is laid-up in the mould dry, then vacuum bagged and the resin is pulled into the mould at lower than atmospheric pressure.

Infusion process where vacuum draws resin into one-sided mould; cover, either rigid or flexible, is placed over top to form vacuum-tight seal.

Material through which water vapour will not pass readily or at all.

Tissue of fibres which drapes and wets easily; of value to provide resin-rich barrier to corrosion or glass print, as in surfacing veil.

Fluid’s resistance to flow.

A laminate containing no entrapped air cavities, blisters or voids.

Laminate defect that occurs during moulding process; characterised by lack of resin material (entrapped air, un-wetted fibres).

Material vaporizing under specific conditions short of decomposition; non-volatile material remains.

Carbon containing chemical compounds (e.g.: solvents or liquids) that evaporate readily at ambient or process temperatures. Environmental, safety and health regulations often limit exposure to these compounds, so low VC content is preferable.