Balancing Bast Fiber Loom Shed Relative Humidity and Warp Regain
Balancing bast fiber loom shed humidity requires maintaining 76-80% RH to achieve 12% warp regain, preserving yarn elasticity and preventing size film dusting.
Cross over Yarn Tackiness
Adhesion Behavior
Adhesive resistance between adjacent warp threads represents a measurable physical variable in the sizing department of a textile mill. Excessive cross over yarn tackiness causes the individual warp ends to stick together after they leave the sizing trough.
Splitting Force
Mechanical lease rods separate the dried warp sheet into individual sheets before winding onto the weaver beam. When cross over yarn tackiness exceeds the tensile strength of the outermost fibres, the splitting process ruptures these hair-like structures instead of cleanly parting the adhesive bond. The force required to divide these stuck yarns is quantified through laboratory peel tests that pull apart parallel sized strands.
Low moisture content in the sizing room helps control this force.
Weaving Obstruction
High resistance at the lease rods creates micro-fractures in the protective size film that coats each yarn. This structural degradation permits the abrasive action of the heald eyes and reed to rapidly wear down the unprotected flax fibres during the weft insertion sequence. Unchecked degradation leads to high loom stoppage rates, warp breakages, and surface fuzziness that ruins the hand of the finished linen fabric.
Sizing departments monitor the drying oven temperature to ensure the adhesive transition of the polymer is fully completed before the yarn meets the lease rods.