Clean room moulding is used in situations where contamination of parts during the production process could be hazardous - for example, the production of certain medical devices or aerospace components. The moulding process must therefore take place in a clean room - a sterile room which is especially designed to reduce the possibility of contamination by dust or other pollutants.
In the interest of reducing the introduction of contaminants, operators entering a clean room environment are generally covered with gowns, shoe covers and masks. The equipment used is also electronic rather than hydraulic, which results in less contaminants in the air.
Clean room moulding generally uses injection moulding, although other moulding methods can be utilised. Due to the care and attention taken to avoid contamination, clean room moulding is usually more expensive than conventional moulding, although depending on the end application, it is sometimes essential.