Interruption Rate
The frequency of yarn ruptures recorded per thousand spindle hours on the spinning frames measures the stability of the spinning process. This spinning room end breakage occurs when the tension applied to the yarn exceeds the local strength of the newly formed wet linen. This rate is recorded in the daily mill log and serves to monitor the quality of the incoming combed sliver.
Processing Variable
Roller nip pressure, flyer speed, and spinning bath temperature represent the mechanical influences on yarn formation. If the hot water bath is kept below the required temperature, the pectins on the flax fiber are not softened sufficiently, leading to a high spinning room end breakage rate. This failure occurs because the fibers cannot slide past each other smoothly, creating high-tension regions that break the strand.
Performance Assessment
Yarn spinners use statistical logs of breakages to determine the efficiency of the machinery and the labor required per spinning frame. An elevated spinning room end breakage rate increases the workload of the operators and leads to excessive waste yarn that must be recycled as tow. Shipments of combed sliver that generate breakage rates above the contractual limit are flagged for rejection or price adjustment.
Technicians inspect the travelers and flyers when breakage spikes to ensure that mechanical wear is not the underlying cause of the yarn ruptures. Consistently low breakage counts verify the high quality of both the raw fiber and the drafting system, ensuring that the yarn produced meets the strength criteria for high-speed warping and weaving.
