Heat and drought lower flax middle lamella pectin shear strength, reducing hackling long-line yield and dropping wet-spinning count caps from Nm 39 to Nm 26.
Targeted enzymatic pectin digestion splits technical flax bundles to under 6 dtex, optimizing sliver cohesion for wet spinning yarn tenacities over 38 cN/tex.
Air permeability testing measures specific surface area to derive bast fibre linear density, requiring precise moisture conditioning and shive removal.
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