<p>Interlayer friction is widely present during both the manufacturing and service processes of fabrics, serving as a critical factor influencing fabric quality and the mechanical performance of fabric composites. This study investigated the interlayer friction behavior of glass-fiber woven fabrics using a Capstan-based experimental setup, with a quantitative analysis of the coefficient of friction (COF) as a function of tension and relative velocity. The results reveal that the coefficient of static friction strongly depends on the initial overlap configuration of fabric knuckles. Specifically, the highest coefficient of static friction was observed when the knuckles were initially aligned in warp/warp or weft/weft configurations, exceeding the corresponding coefficient of dynamic friction values. In contrast, the lowest coefficient of static friction occurs under warp/weft overlaps, where it is even lower than the coefficient of dynamic friction. Moreover, the COF decreases with increasing tension and gradually approaches a stable value, while it increases monotonically with relative velocity. Notably, the minimum coefficient of dynamic friction exhibits greater sensitivity to these parameters than its maximum counterpart. Finally, quantitative analysis shows that the dependence of COF on tension and relative velocity follows a power-law relationship. Based on this, a compound power-law model was proposed, which not only accurately characterizes the individual influence of the two on the COF, but also reveals their synergistic interaction in shaping the overall frictional behavior.</p>