Meaning
Systematic analysis of materials ensures that no unintended resins or chemicals have been mixed into a batch during production or transport. Performing cross contamination screening identifies the presence of foreign polymers that could alter the physical properties of the main material.
Quality Control
Early detection of mixed materials prevents the loss of an entire production run due to incompatible plastics. If cross contamination screening reveals a second resin phase, the mechanical strength and the visual appearance of the moulded parts will likely be compromised. This step acts as a safeguard against the high costs of product recalls and tool damage.
It ensures that the moulder can maintain a consistent process without unexpected changes in melt behavior.
Sourcing Risk
Supply chains involving multiple handlers or recycled content carry a higher probability of impurities. Using cross contamination screening helps verify the claims of a supplier regarding the purity and the origin of a material. It allows for the identification of trace levels of previous batches that remained in the silos or the piping systems.
Detection Limit
Sensitivity of the screening method determines how much of a contaminant can be found before it causes a failure. Thermal analysis or spectroscopy is often used to find these unwanted components at low concentrations. The result is a more robust understanding of the material quality before it enters the high pressure environment of an injection mould.
