A method for estimating the tension acting on a fiber being produced in a melt spinning process is proposed. This method is available whenever a cool airstream is used. Under suitable conditions, the tension is estimated to be
T = 4Q2/πd2ρ
where T is the tension (dynes); Q is the mass extruded through a spinneret orifice in unit time (g/sec); d is the diameter of the melt fiber (cm); and ρ is the density of the fiber (g/cm3).
