Impact of Pectin Removal on Hackling Yield and Line Fineness
Controlled pectin removal enables clean bundle cleavage, elevating metric fibre fineness above Nm 2000 while maintaining long line yield above 60 percent.
Dynamic Wet Friction
Fibre Interaction
Lubrication resistance during the wet processing stage determines the quality of flax yarns. Dynamic wet friction identifies the drag force occurring between wet fibres and contact surfaces under active movement. Spinners monitor these values to calibrate carding machines and drawing frames.
High resistance leads to fibre breakage, while values below the threshold promote slippage and uneven drafting.
Drafting Protocol
Technical teams rely on this metric to define the speed limits for wet spinning lines. Changes in water temperature or the addition of surfactants alter the chemical affinity of the pectin layer on the flax surface. Engineers adjust the rotor tension in response to these variations to maintain a consistent linear density.
Laboratory test stands simulate the production run by pulling a strand through a bath at defined velocities. Data from these trials informs the setting of the draw-off force in the mill documentation.
Acceptance Boundary
Procurement departments use these limits to set the minimum quality standards for incoming raw material batches. Acceptance criteria stipulate that flax stalks must exhibit specific slip characteristics when fully saturated in a controlled environment. Suppliers certify that their fibre lots meet these mechanical requirements before shipping.
Failure to remain within the specified range triggers a secondary review of the retting process. Deviations in the surface properties of the fibre result in inconsistent tension that creates flaws in the final woven cloth.