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.
Linear Density Tolerance
Fibre Spread
Flax sliver preparation governs the baseline mass distribution across every spinning frame in the mill. Linear density tolerance controls the acceptable variation in linear mass along a drafted length of flax sliver before roving enters the ring spinning frame. Raw scutched flax fibres arrive in bales with inherent variability in individual technical fibre dimensions.
Mill floor technicians establish an allowable deviation percentage from the nominal tex value to prevent yarn breakage downstream.
Drafting Variation
Roller drafting units attenuate the sliver continuously to reduce cross-sectional mass. Uneven drawing frames introduce thick spots that compromise yarn strength during high speed spinning operations. Quality inspectors measure sliver sections on an electronic capacitance tester to record linear density variations against the internal mill standard.
Excess mass fluctuation causes drafting forces to spike and leads to broken filaments on the spinning ring.
Export Grade
Finished linen yarn lots require strict adherence to buyer contracts regarding linear density parameters before baling for export. Commercial agreements specify permitted mass deviations per kilometre of yarn to guarantee fabric weight consistency in weaving mills. Independent testing laboratories verify the linear density tolerance figures against international textile standards during final lot certification.
Certified test reports accompany each shipping container to confirm compliance with agreed commercial specifications.