Comb Array Staple Length Distribution Analysis for Hackling Yield Prediction
Comb array length analysis predicts hackling long-line yield, tow waste, and spinnable count limits to establish true landed cost per finished metre.
Comb Array
Measurement Instrument
Laboratory testing instruments used to sort and measure the length distribution of textile fibres operate by separating individual strands into length categories. The comb array consists of a series of closely spaced metal combs designed to hold a sample of flax or linen fibres during manual sorting. This apparatus allows technicians to extract fibres sequentially from longest to shortest.
A precise diagram of fibre length, known as a staple diagram, emerges from this action. Mill laboratories rely on this configuration to evaluate the spun potential of incoming raw flax consignments before spinning.
Sorting Procedure
Manual manipulation of the specimen within the pins requires a systematic extraction process. The technician draws fibres from the comb array by their tips using a special gripping clamp, then lays them down on a velvet board in descending order. This manual sort reveals the proportion of short fibres, which otherwise increase yarn hairiness and reduce overall spinning efficiency.
Mill managers utilise these records to adjust the settings on drawing and combing machines.
Grading Outcome
High variation in fibre length indicates a lower grade of raw material that requires more intensive processing. By analyzing the results obtained from the comb array, the spinning mill can negotiate price adjustments with raw flax suppliers or redirect poorer batches to coarser weft yarn production. Accurate sorting prevents the waste of high-quality long-staple linen on low-count yarns.