Flax Cell Wall Microfibril Alignment Determination Methods
X-ray scattering and polarized Raman spectroscopy determine flax microfibril angles to project spinning performance and yarn tenacity.
Elementary Fibre Diameter
Geometric Metric
Single cell thickness defines the cross-sectional dimension of the individual isolated fibers that constitute the core building blocks of flax yarn. Measuring the elementary fibre diameter reveals the ultimate limit of yarn fineness that can be achieved through advanced wet spinning techniques. This dimension is determined by the growing conditions of the crop and the genetic profile of the flax plant.
Finer diameters allow more fibers to be accommodated in a given yarn cross-section, which improves both the yarn strength and its softness. The distribution of these cell diameters across the crop determines the uniformity of the spinning draft. Consistent cell dimensions prevent the generation of irregular drafting waves that weaken the strand.
Spinning Capability
Spinning fine count yarns requires a raw material with a low average cell thickness. When the elementary fibre diameter is small, the yarn exhibits higher flexibility and less stiffness, making it ideal for shirts and bed linens. If the diameter is too large, the yarn becomes harsh and suffers from high stiffness, which limits its use to industrial textiles.
Spinners utilize these dimensions to adjust the draft settings and water temperatures during processing.
Laboratory Inspection
Microscopic analysis and image processing software measure the thickness of the separated flax cells to verify quality. Technicians extract the cells using chemical maceration to dissolve the pectins before conducting the measurements. This analysis provides the spinner with data to verify that the flax lot complies with the acceptance criteria of the contract.
Maintaining strict limits on diameter variance is essential for preventing uneven dyeing in the final woven linen.