Chemical Breakdown
Quantitative laboratory tests determine the composition of carbohydrate polymers in plant cell walls. In linen manufacturing, monosaccharide analysis provides a detailed breakdown of the hemicellulose and pectin components in raw flax fibers. This analysis measures the sugars released during processing, helping to optimize the retting process.
Hydrolysis Procedure
High-performance liquid chromatography separates and quantifies individual sugars such as xylose and glucose after acid hydrolysis of the fiber samples. The extraction process breaks down the complex polysaccharides into their monomeric units, which are then injected into the analytical column. This step requires precise temperature control to prevent the degradation of the released monomers during the acid treatment.
The resulting chromatogram provides a chemical fingerprint of the flax batch’s non-cellulosic matrix.
Fibre Assessment
Spinneries use these sugar profiles to predict how the raw fiber will behave during wet spinning and yarn finishing. Since pectins and hemicelluloses bind the individual flax cells together, monosaccharide analysis helps in predicting the fineness and strength of the spun yarn. High levels of residual rhamnose and galacturonic acid indicate incomplete retting, which can cause coarse and stiff yarn.
This analytical data guides the chemical dosing in the wet-treatment baths to ensure uniform yarn quality, which is crucial for high-speed automated weaving looms that require highly flexible and strong warp yarns. The laboratory reports are archived to trace seasonal variations in fiber chemistry.
