Chemical Analysis
Polymer identification procedures utilize infrared spectrophotometry to quantify the composition of polyvinyl chloride compounds. During astm d2124 testing, the technician measures the absorption of infrared energy to determine the specific additives and stabilizers present in the resin batch. It provides the mill with a chemical signature of the incoming raw materials.
Specimen Preparation
Samples are milled into thin films or pressed into discs to allow for maximum light transmission during the scan. Accurate astm d2124 testing relies on achieving a uniform thickness to prevent scattering of the infrared signal.
Calibration Metric
Analysts compare the generated spectrum against a library of known substances to confirm compliance with regulatory limits for hazardous components. Regular astm d2124 testing identifies deviations in the polymer blend that standard mechanical tests overlook. The scan covers the entire mid-infrared range to detect traces of unintended copolymers or contaminants.
Results are used to validate the purity of the synthetic coating before the fabric enters the dyeing range.
Acceptance Value
Verification of the resin mix prevents large batches of defective coating from being applied to the textile. If the astm d2124 testing profile shifts by more than two percent, the supplier must verify the feedstock origin.
