The Effect of Testing Conditions on Fiber Drag: Part I: Dynamic Method
1963
Simpson, Jack | DeLuca, Lloyd B.
The effect of testing conditions on fiber drag when a dynamic drafting force measurement (West Point Cohesion Tester²) is used was investigated. It was demonstrated that the drag characteristic of a particular cotton can best be evaluated by measuring the drafting tenacity at several roll settings. An exponential type of curve was obtained when the reciprocal of roll setting was plotted against drafting tenacity. Based on the equation for a particular draft, the equation for any draft can be derived by multiplying the constant of the equation by the ratio of the drafts. The drafting-force wavelength increased with increases in fiber length, roll setting, and draft, and it corresponded exactly to the wavelength of the sliver thickness wave as obtained with the Saco-Lowell Sliver Tester.
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