Yarn Joining
Compressed air streams intermingle individual fibers from two untwisted yarn ends to join continuous textile strands without knots. Automatic winding machinery applies pneumatic splicing to produce knotless yarn packages that pass smoothly through high-speed weaving and knitting equipment. Flax yarn processing relies on compressed air joining to accommodate stiff, inelastic technical fibers that resist mechanical knotting.
The technique applies to single and plied yarns across various linear densities but stops at heavy cordage where mechanical clamping is required.
Air Chamber Mechanism
The joining process occurs inside a precision splicing chamber equipped with air nozzles. Mechanical cutters trim and untwist the two yarn ends using vacuum suction or reverse air blasts to expose individual fiber tails. The untwisted ends overlap inside the chamber, where a controlled burst of high-pressure air creates turbulent vortices.
These air currents intertwine the overlapping flax fibers, recreating the structural twist of the parent yarn. Air pressure settings and chamber duration must be adjusted for flax yarns owing to higher fiber stiffness compared to cotton or synthetic fibers. Properly spliced joints achieve up to ninety percent of parent yarn tensile strength while maintaining equivalent yarn diameter.
Production Efficiency
Knotless linen packages eliminate yarn breakage caused by bulky knots catching in loom reed dents or drop wires. Warp preparation speed increases significantly when creel packages feature smooth pneumatic splices. Fabric quality improves because smooth yarn joints prevent surface slubs and localized warp tension spikes during weaving.
Mill quality control records track splice failure rates during high-speed unwinding tests.
