Coating Failure
Structural separation of the protective sizing film from the surface of warp yarns exposes the fibrous core to severe mechanical friction. In linen weaving preparation, sizing binder delamination happens when the adhesive polymers fail to bond securely with the flax fibers. This failure leaves the yarn vulnerable to shredding and breakage under the rapid stress cycles of the loom.
Operational Disturbance
Peeling of the protective layer during weaving results in the accumulation of loose binder powder and fiber lint within the loom harnesses. Once sizing binder delamination occurs, the shed becomes obstructed, and the warp yarn loses its smooth gliding property. This disruption increases the coefficient of friction, leading to frequent micro-stops and a decline in the overall efficiency of the weaving room.
Preventive Measures
Adjusting the chemical formulation of the sizing bath and maintaining tight control over the drying cylinder temperatures prevents the adhesive coating from cracking and peeling. Technicians test the cohesion of the size on yarn samples taken from the sizing machine, recording the results in the preparation room log. To avoid sizing binder delamination, the mill adds specific softeners to the mix, ensuring the coating remains flexible and adheres to the flax yarn under dry weaving conditions.
This routine test helps the mill meet the buyer’s rigid surface smoothness criteria for high-grade linen warps.
