Tank when we pg 13
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Standard Draves Wetting Test AATCC Method No. Apparatus for running Draves wetting test (Courtesy of Union Carbide). Wetting and scouring are normally associated as being. 16-1 shows the technique for evaluating wetting speed by the standard Draves wetting test. In 50 g/1 solid caustic yields a product that has very good detergency, low foam, and a wetting time (via Draves Cotton Skew Test) of agent 10-13 seconds. Kissa reviewed these techniques and the theoretical basics of wetting and wicking of such fiber assemblies. There are different test methods available, which allow the characterization of the wicking behavior of fibrous assemblies, such as the canvas disk wetting test, the Draves test, the demand wetting test, and the Lennox-Kerr test or sinking float test. TABLE 6-2 Wetting Efficiencies of Surfactants in Aqueous Solution (Concentrations for 25 s Sinking Time at 25° C in Draves Test).
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TABLE 6-1 Wetting Times of Surfactants in Aqueous Solution (Draves Test, 2. Wetting times for some surfactants, using the Draves test at 25☌, with a 3-g hook and a 5-g cotton skein, are listed in Table 6-1. To achieve a 1-s dynamic surface tension value, yls, that does not change much with decrease in surfactant concentration, a bulk phase surfactant concentration of at least 5 x 10-4 M is required (Rosen, 1990). Ī fairly good correlation has been observed between the wetting time on cotton skeins, measured by the Draves test, and the dynamic surface tension (Chapter 5, Section IV) at 1 s. TABLE 13 Wetting Properties of Sulfosuccinate Diesters According to the Draves Test (g/L to give 25-s wetting time).