Dew-Retted Heilongjiang Line Fiber Processing Parameters for Ring Frames
Optimize wet ring frame trough temperatures to 72°C and hold draft ratios below 17 for Heilongjiang dew-retted line flax to limit end breaks.
Dynamic Draft Force
Drafting Resistance
The mechanical load exerted upon flax roving during the attenuation process determines the structural integrity of the resulting yarn. Dynamic draft force measures the instantaneous opposition encountered by fibre strands as rollers accelerate them to achieve specific linear density. Mills record this value during the spinning phase to detect inconsistencies in the fibre mass per unit length.
Fluctuations in these readings indicate variations in internal fibre cohesion that impact the tensile strength of the finished yarn.
Tension Calibration
Precise control of the attenuation zone allows operators to match the drawing speed with the inherent viscosity of the flax bundles. Fibre bundles possess uneven moisture content and lignin levels that alter the friction generated against the drafting rollers. Technicians monitor the gap between the drafting apron and the nip point because misalignment creates irregular resistance patterns.
A higher resistance value suggests improper alignment or worn components requiring immediate adjustment to prevent breakage. Constant monitoring ensures that the draft settings remain consistent across the entire production run. These adjustments prevent excessive fibre breakage that reduces the yield of high-quality long fibre grades.
Data captured during this stage provides an objective basis for mill acceptance criteria when auditing internal spinning efficiency.
Production Variance
Variations in the force profile signal deviations from standard spinning parameters. High variability indicates poor blending of fibre batches prior to the drawing frame. Uniformity in the measured resistance ensures that the final cloth consistency meets the requirements for export grade linens.
Consistent drafting performance provides the primary assurance that the textile will withstand downstream finishing processes without structural failure.