Physical Interaction
Physical interactions of longitudinal yarns prior to any chemical treatment or finishing. Greige warp mechanics determine how raw threads respond to the stresses of high speed weaving. These forces include cyclical tension and abrasion within the loom harness.
Tensile Resistance
Measurements of elongation and breaking strength define the limits of the unprocessed yarn. Such greige warp mechanics rely on the inherent twist and fibre cohesion of the raw material. If the tension exceeds the elastic limit, the individual ends fail.
Frictional Coefficient
Surface roughness dictates the level of shedding during the weaving process. Under the specific greige warp mechanics of a high density construction, excessive friction leads to fibre migration and balling. This interaction occurs at the interface between the yarn and the metal reed.
Operational Limit
Weaving efficiency drops when the mechanical load surpasses the design capacity of the yarn. Because greige warp mechanics are static until the loom engages, testing must simulate the actual speed of production. A warp that performs well in a slow lab test might fail under the heat and vibration of a modern industrial air jet loom.
Constant monitoring of break rates provides the data needed to adjust machine settings or sizing applications. High break rates indicate that the mechanical properties of the greige state are insufficient for the current loom speed.
