Meaning
An independent analytical assessment performed by an accredited, neutral third-party laboratory provides binding empirical findings to settle disputes between a resin supplier and a plastics converter over material non-conformance. When incoming raw material testing conducted by a moulder diverges from the resin producer’s certified values, commercial contracts invoke this external evaluation to break the deadlock. The referee facility operates under standardized testing methods such as ISO or ASTM standards, testing sealed, retained samples taken from the disputed resin batch.
The determinations of the referee laboratory are contractually stipulated as definitive, resolving technical disagreements over polymer characteristics without litigation.
Independent Determination
Contractual supply frameworks stipulate third-party verification when the buyer’s quality control laboratory rejects an incoming resin lot that the seller’s documentation certifies as compliant. Recourse to referee testing removes commercial bias by submitting identical, sealed retain samples to an accredited testing laboratory that possesses no financial stake in the transaction. This protocol resolves disagreements over sensitive polymer properties, including melt volume-flow rate, intrinsic viscosity, moisture levels, filler percentages and volatiles content.
Virgin polybutylene terephthalate delivered with suspect intrinsic viscosity might cause processing problems such as nozzle drool or part brittleness, while the supplier’s initial data sheet asserts conformity. The external laboratory performs blind verification using calibrated capillary rheometers and analytical instrumentation maintained under ISO 17025 accreditation, delivering an uncompromised evaluation of physical properties.
Chain Of Custody
Strict sampling controls govern the integrity of polymer materials transferred to the designated referee laboratory. Both counterparties must sign off on sampling protocols executed at the time of delivery, taking dual or triple sealed aliquots from the bulk tanker, railcar or gaylord boxes. Without verified sampling procedures, referee testing cannot determine whether polymer contamination, moisture re-absorption or thermal degradation occurred before delivery or during warehouse storage.
Testing protocols mandate identical specimen preparation rules, including strict vacuum drying times for hydrolytically sensitive polymers such as polycarbonate, polyethylene terephthalate and polyamide. If a converter neglected proper pre-drying before internal testing, the referee laboratory’s controlled thermal drying procedure reveals whether low melt viscosity stemmed from resin defects or improper factory preparation.
Cost Assignment
Commercial purchase contracts specify how testing expenses and operational liabilities are allocated based on the third party’s final findings. The loser-pays clause typically requires the unsuccessful party to absorb the full cost of referee testing, along with associated third-party logistics and material handling fees. If the neutral laboratory confirms that the resin violates the purchase specification, the supplier must replace the material, pay demurrage costs and credit back-charges.
Validation by the referee laboratory of the supplier’s original certification requires the converter to accept the lot and pay all analytical testing invoices, making this mechanism a high-stakes resolution tool.
