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Abstract
The theoretical factors governing the constant- and falling-rate periods in cloth-drying are reviewed, and the distinction between the two regions is pointed out. The difficulties involved in the analytical derivation of a single equation to represent the entire drying process are summarized, together with the conditions that must be met in order to achieve this aim.
A unified equation is then derived empirically and applied to a large number of drying trials with a wide range of fibre contents, drying times, air temperatures, and initial moisture contents. It is shown that the equation is applicable in all cases, and its use in the design of an automatic control system for tentering is postulated.