Chemical Composition
Complex structural polysaccharides located in the middle lamella of bast fibres provide the cohesive matrix that binds individual cells into technical bundles. Extraction of flax pectin begins during agricultural retting and finishes during yarn preparation. The remaining polymer governs the final spinning and cloth production limits.
Degumming Chemistry
Chemical degradation of the intercellular matrix occurs during the boiling and bleaching of spun yarn or manufactured cloth. Acidic or enzymatic treatments break down the molecular chains of flax pectin, converting insoluble calcium pectates into soluble fractions. This chemical removal increases the softness and dye uptake of the linen textile.
Excessive treatment must be avoided, as complete loss of the polymer reduces the tensile strength of the yarn.
Spinning Performance
Frictional behaviour during wet spinning depends directly on the thermoplastic softening of the binding elements. Wet spinning frames use hot water to soften flax pectin, which allows the technical fibres to slide past each other and draw down into fine yarn. The softened gel cools and hardens after winding, locking the fibres in their new positions to form a stable structure.
Insufficient softening results in uneven yarn thickness and frequent breakages. Control of water temperature in the spinning trough remains the primary method for regulating this physical transition.
