Frictional Resistance
Frictional resistance between crossing yarn strands determines the stability of the weave and the ease of yarn movement during shed formation. The interlace friction coefficient evaluates how easily two contacting yarns slide against each other under a specified load. This value affects both the weaving efficiency and the final handle of the fabric.
Testing Method
Static friction trials involve wrapping one yarn around another and pulling them in opposite directions while recording the tension. A high interlace friction coefficient indicates that the yarns will grip each other tightly, which can cause high warp tension during shedding and lead to yarn breaks. The test is performed under controlled laboratory conditions to ensure results are repeatable across different yarn batches.
Yarn Finish
Spin finishes and sizing agents are applied to the yarn to reduce friction. These lubricants lower the interlace friction coefficient, allowing the yarns to slide past each other smoothly on the loom.
Fabric Stability
Once the yarn is woven into cloth, a moderate amount of friction is needed to prevent the yarns from shifting. If the interlace friction coefficient is too low, the fabric can suffer from yarn slippage at the seams. This slippage reduces the durability of the finished garment.
