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Capillary Sorption Equilibria in Fiber Masses

Personal Products Company, Div. of Johnson & Johnson, Milltown, New Jerse

C. Kapur

Personal Products Company, Div. of Johnson & Johnson, Milltown, New Jerse

, Phenomena related to the equilibrium take-up and retention of fluid in porous media can be explained and predicted in terms of the capillary sorption cycle (CSC) formed by the absorption and exsorption isotherms. An experimental method is described for determining the CSC as well as the simultaneous changes in the bulk volume of the porous medium as it cycles between 0 and 100% fill-up. The complex shape of the CSC and the, sometimes highly significant, differences between the first and all subse quent cycles can be explained in terms of the mechanism which causes volume changes. The method of analysis provides a tool for investigating the capillary sorption proper ties of heteroporous media, such as fiber masses of different composition, structure, and bulk density. This has been demonstrated by applying the criteria of sorption equi librium to phenomena related to the spontaneous fill-up and capillary transfer of fluid in the pore system of fiber masses.

Textile Research Journal, Vol. 37, No. 5, 356-366 (1967)
DOI: 10.1177/004051756703700504


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