Comb Sorter Staple Profiling for Long-Staple Linen Yarn Qualification
Comb sorter profiling establishes staple length distribution, short fibre content, and drafting bounds to guarantee target yarn counts and fabric yield.
Baer Sorter Array
Fiber Length Analysis
Laboratory apparatus designed for fiber measurement isolates individual long and short fibers from a prepared sample to chart length distribution. Textile laboratories utilize the baer sorter array to extract successive groups of aligned flax fibers from a combed beard and lay them down sequentially on a plush velvet pad. This mechanical sorting creates a visual profile from the longest to the shortest fibers.
Raw material buyers demand this assessment because fiber length dictates the maximum spinning limit of the delivery.
Fractional Sorting Procedure
Manual manipulation of the metal combs and sorting forceps requires a steady hand and a standardized workflow to prevent fiber breakage during the extraction sequence. The operator combs the flax sample to align the ends, places the beard in the lower comb bank, and then uses a grip to pull out the fibers that project furthest before placing them on the velvet sorting field. Each group represents a distinct length class.
Repeating this pulling action across successive combed banks generates a complete fiber array. The resulting trace represents a physical histogram that can be measured with a graduated rule. Because manual combing can introduce human bias, the technician must apply uniform tension during every pull to ensure the final sorted trace corresponds accurately to the raw fiber distribution.
Spinning Limit Prediction
Calculations based on the sorted fibers determine the mean length and the proportion of short fibers that exceed thirty millimeters. Spun yarn strength depends on these parameters because longer fibers provide more contact surface for twist insertion. Slippage during drafting increases when the proportion of short fibers exceeds twenty percent.
Mills adjust their draft ratios and machine speeds according to these array profiles to avoid excessive yarn breakage during the wet spinning process.