Combing Process
The physical separation of short, tangled fibers and shives from the long flax stricks during machine combing determines the proportion of line fiber recovered. Understanding hackling yield mechanics is essential for predicting the ratio of high-value line linen to lower-value tow. The action of the pins gradually increases in density to split the fiber bundles without causing excessive breakage of the long technical fibers.
Mechanical Factor
Pin geometry, machine speed, and the moisture content of the flax stricks represent the primary variables in the combing room. These variables alter the hackling yield mechanics by changing the resistance of the fiber bundles to the combing force. Optimal combing requires that fibers have sufficient moisture to remain pliable, preventing brittle fracture when the pins penetrate the bundle.
Evaluation Criterion
Mill managers track the recovery rate of combed line fiber against the raw scutched input to assess the commercial viability of each flax batch. This measurement of hackling yield mechanics is recorded on the daily combing logs and forms the basis for material cost allocation. When the yield of line fiber drops below the accepted threshold, technicians inspect the combing sheet pins for wear or adjust the machine cycle times to reduce combing severity.
Consistently high yield values verify the efficiency of both the preceding retting process and the mechanical combing sequence.
