Yarn Count and Sizing Chemistry in Warp Preparation
Warp sizing requires matching yarn packing factor to polymer viscosity, adjusting squeeze nip pressure for precise solids add-on, and maintaining elongation.
Reed Dent Clearage
Weaving Space
Physical distance between two adjacent metal wires of a loom’s reed determines the space available for warp yarns to pass through during loom operations. Loom tuners set the reed dent clearage based on the thickness of the flax yarn being turned into linen fabric. This opening must accommodate both the yarn and any surface hairiness without causing excessive friction.
Its dimensions dictate the maximum density of warp yarns per inch.
Mechanical Clearance
Warp yarns undergo intense friction as the reed beats up the weft yarn against the cloth fell. If the reed dent clearage is too narrow for the selected yarn count, the fibres will rub against the metal wire and wear out. This friction leads to warp breakages that force the loom to stop, which reduces the efficiency of the loom shed.
Using a wider gap with multiple yarns per dent can alleviate this stress, but it may affect the uniformity of the cloth. Balancing this clearance is essential for maintaining high production rates.
Defect Prevention
Technicians select the reed number and count before mounting the warp on the loom. A correct selection ensures the yarn passes through smoothly without pilling. Proper spacing prevents warp striping defects in the finished linen fabric.