..., to know the friction coefficient when choosing the appropriate sewing thread. This contribution presents the influence of the sewing thread movement velocity over the guide element, the influence of the contact angle between the thread and guide element and the influence of the guide element material...

... handle Friction coefficient On the basis of these curves the strain increment, in the initial interval of force elongation curve, and force increment corresponding to this strain were read. Initial tensile modulus was calculated according to equation (5): (see equation 5) where: b = sample...