Capillary Rheometer End Correction Data Processing Workflows
End-corrected capillary rheology isolates entry losses and non-Newtonian wall shear rates to establish accurate melt viscosity curves for compounding quality control.
Resin Valuation
Meaning
Financial and material audits determine the monetary worth and utility of bulk plastic raw materials based on their purity, grade, and processing history. This assessment method dictates the pricing of incoming material lots, particularly when utilizing recycled resins or off-spec batches that may contain contaminants. Through a structured resin valuation, purchasing departments calculate the true economic value of a material by factoring in the costs of additional processing, drying, or filtration required to make the material usable.
Establishing this value prevents the overpayment for variable feedstocks and secures the operating margins of high-volume molding lines.
Quality Impact
Variations in the melt flow index and moisture content can alter the processing efficiency of the resin. When resin valuation is conducted on incoming lots, these physical properties are analyzed to determine the likelihood of molding defects. Batches that require extensive drying or have high contamination levels are discounted to offset the increased manufacturing risk.
Market Costing
Commodity price indexes provide the baseline for calculating the raw material cost before quality adjustments. Purchasing contracts often tie the final price of the resin to these indexes, using the valuation audit to apply discounts or premiums. This mechanism ensures that the buyer only pays for verified material capability.
Testing Requirement
Laboratory testing of sample batches must be executed before the final price is settled. If the analysis is performed using uncalibrated equipment, the resulting resin valuation will be skewed, leading to overpayment or supplier disputes.