Mechanisms of Transient Moisture Transport Between Fabrics

A technique was developed to study moisture transport and to determine the mechanism by which moisture is transported between fabrics under transient conditions at low moisture contents. A variety of fabrics were tested and experiments were performed at various levels of moisture content from 3% to over 100% above regain. Vapor diffusion was the major mechanism of moisture transport between two layers of fabric at low moisture levels for all fabrics. Wicking did not begin until the moisture content was high, more than 30% above regain for the woven samples. The knitted samples did not wick at all. Hydrophilic finished polyester samples had markedly improved transport rates at high moisture contents but showed no improvements at low levels of moisture where vapor diffusion prevails. Moisture transport appears to be closely related to comfort. At low moisture levels, fabrics rated as comfortable transported more moisture than fabrics rated as uncom fortable. Polyester fabric to which a hydrophilic finish was applied to improve moisture transport by wicking was judged similar in comfort to the unfinished polyester. Both transport little moisture at low levels of moisture content, perhaps because at low levels of moisture content, wicking cannot occur, since there is an insufficient amount of moisture to fill the capillaries to permit wicking.

[1]  F. T. Peirce,et al.  14—MEASUREMENT OF THE WATER VAPOUR PERMEABILITY OF TEXTILE FABRICS , 1945 .

[2]  J. E. Algie,et al.  Kinetic Studies of the Wool -Water System , 1961 .

[3]  Norman R. S. Hollies,et al.  Water Transport Mechanisms in Textile Materials , 1957 .

[4]  J. Hearle,et al.  Moisture in textiles , 1960 .

[5]  R. M. Barrer.  Diffusion in and through solids , 1941 .

[6]  Bernard Miller,et al.  Liquid Transport Through Fabrics; Wetting and Steady-State Flow Part I: A New Experimental Approach , 1978 .

[7]  Marjory L. Joseph.  Introductory textile science , 1966 .

[8]  Paul Calvert,et al.  Diffusion in polymers , 1977, Nature.

[9]  R. D Laughlin,et al.  Some Aspects of Capillary Absorption in Fibrous Textile Wicking , 1961 .

[10]  Anthony M. Schwartz,et al.  The Migration of Liquids in Textile Assemblies , 1961 .

[11]  L. Fourt,et al.  Diffusion of Water Vapor Through Textiles , 1947 .

[12]  A. Schwartz,et al.  The Migration of Liquids in Textile Assemblies , 1959 .

[13]  R. C. Weast.  Handbook of chemistry and physics , 1973 .

[14]  Norman R. S. Hollies,et al.  Water Transport Mechanisms in Textile Materials1 Part I: The Role of Yarn Roughness in Capillary-Type Penetration , 1956 .

[15]  R. Harper,et al.  Moisture-Related Properties of Cotton-Polyester Blend Fabrics1 , 1976 .

[16]  Cotton Fibers as Means of Transmitting Water Vapor , 1957 .

[17]  Bernard Miller,et al.  Liquid Transport Through Fabrics; Wetting and Steady-State Flow , 1978 .

[18]  P. C. Hiemenz,et al.  Principles of colloid and surface chemistry , 1977 .

[19]  I. C. Watt,et al.  Kinetic Study of the Wool-Water System , 1960 .

[20]  M. Whelan,et al.  The Diffusion of Water Vapor through Laminae with Particular Reference to Textile Fabrics , 1955 .

[21]  A. Schwartz,et al.  The Migration of Liquids in Textile Assemblies , 1962 .

[22]  James Gregory B.Sc..  5—THE TRANSFER OF MOISTURE THROUGH FABRICS , 1930 .

[23]  John Crank,et al.  The Mathematics Of Diffusion , 1956 .