Some features of viscose yarn take-up on the package on machines of the PNSh type

Conclusions In unwinding a yarn from a package, tension increases from the outer winding layer to the inner ones; this occurs most sharply in unwinding the last 500–600 g of yarn.On increasing the yarn winding speed, tension rises, due to additional yarn friction on the package surface.On removal from the package, a yarn experiences periodic fluctuations in tension which vary both in amplitude and wavelength, both in unwinding a double layer and also in unwinding a single turn.Regardless of the form of yarn winding on packages, the tension in unwinding rises from the outer layers to the inner ones by a factor of 10.Translated from Khimicheskie Volokna, No. 4, pp. 32–35, July–August, 1986.