Structure Determination of Raw Flax Yarns for Warp Preparation
Evaluating raw flax yarn bundle morphology, pectin chemistry, and tensile metrics prevents high-speed warping breaks and protects loom hour efficiency.
Splice Strength Efficiency
Mechanical Ratio
Ratio of the breaking force of a spliced joint to that of the parent yarn is a primary quality parameter used to evaluate the performance of yarn joining in linen spinning. This splice strength efficiency is measured by tensile testing and logged in the spinning quality report. It indicates how well the spliced area can withstand the tension of subsequent warping and weaving operations.
Splicing Process
Automatic winding machines join yarn ends using compressed air or water to untwist, intermingle, and retwist the fibers, replacing traditional knots. Linen yarn requires highly precise splicing parameters because of the stiff and long nature of flax fibers. If the splice strength efficiency is too low, the joint will fail during the high-tension phases of weaving, leading to loom stoppages and fabric defects.
The spinning mill optimizes the air pressure, splicing duration, and water mist quantity to maximize this ratio for different yarn counts.
Weaving Verification
Warp runs on the loom require joints that are both strong and thin to pass smoothly through the heald eyes and reed dents. Spliced yarns with high efficiency ratings are selected for warp prep, while lower-quality runs are restricted to the weft. This selection maintains high loom productivity and reduces defects.