Enzymatic Degumming Impact on Bast Fibre Sliver Cohesion and Wet Spun Yarn Tenacity
Targeted enzymatic pectin digestion splits technical flax bundles to under 6 dtex, optimizing sliver cohesion for wet spinning yarn tenacities over 38 cN/tex.
Non-Cellulosic Binder
Resin Application
Synthetic polymers applied to flax rovings modify the interfacial adhesion between the plant material and the surrounding matrix during composite fabrication. A non-cellulosic binder coats the intermediate slivers to prevent fiber degradation during high-speed wet spinning runs in Jiangxi mills. Excessive polymer deposition alters the thermal degradation profile of the yarn, shifting the pyrolysis peak downward by several degrees Celsius.
Mill engineers record these treatment parameters in the daily sizing ledger before moving the bobbins to the drying chamber. Applying excessive amounts of this agent restricts subsequent moisture absorption, which interferes with alkaline scouring baths later in the finishing line.
Tensile Strength
Mechanical testing of treated linen yarns reveals significant variations in elongation at break depending on polymer distribution across the cross section. A non-cellulosic binder increases the ultimate load capacity of the raw flax strand by filling internal voids between individual elementary cells. Quality control technicians evaluate tenacity ratings on conditioned samples using standard dynamometers under controlled humidity conditions.
Acceptance limits established by the purchasing department require breaking tenacity values to exceed specific thresholds before export approval is granted. Tensile performance drops sharply if curing temperatures exceed recommended thresholds during the thermal setting phase.
Crosslinking Density
Chemical bonding within the applied polymer network dictates the permanence of the sizing agent during subsequent alkaline treatments. A non-cellulosic binder exhibits varying resistance to sodium hydroxide solutions depending on the proportion of reactive functional groups available for condensation reactions. Laboratory analysts determine crosslinking efficiency through solvent extraction tests on finished fabric samples taken from the loom state output.
Buyer specifications mandate a maximum soluble fraction percentage to ensure the sized yarn maintains structural integrity through repeated industrial laundering cycles. Polymer chains degrade under prolonged exposure to ultraviolet radiation, causing yellowing on the stored fabric surface prior to final garment assembly.