Measuring Cyclic Oligomer Content in Synthetic Filament Extracted Yarns
Solvent extraction coupled with liquid chromatography isolates synthetic yarn cyclic oligomers to set strict delivery specs and stop knitting deposit failures.
ISO 1833 Yarn Extraction
Standardized Extraction
A standardized testing protocol isolates and calculates the mass proportion of different fibres in blended yarns through selective chemical dissolution. Textile quality checkers perform the ISO 1833 yarn extraction to verify fiber content declarations on commercial product labels. This procedure removes one fibre type from the blend using a specific solvent, leaving the second fibre intact for weighing.
Measuring the dry weights before and after chemical exposure determines the exact composition of the synthetic and natural blend.
Testing Sequence
The dry sample undergoes treatment with a chemical reagent that dissolves only the target fibre. Filtering the mixture collects the undissolved fibres on a sintered glass crucible. Drying and weighing this residue allows the lab to calculate the original blend ratio.
Customs Compliance
Garment import duties depend on accurate fibre percentage declarations. If the measured fiber ratio deviates from the commercial invoice, the shipment can face customs delays. This standard test provides the certified evidence required for cross-border trade.
Process Accuracy
Correct solvent temperature and exposure time are necessary to prevent the dissolution of the second fibre. If the solvent is too strong, the intact fibre loses mass, resulting in an incorrect calculation. Strict adherence to the standard procedure prevents these analytical errors.