Articles:

Factors Influencing Air Flow Through Unbacked Tufted Carpets

Hsi-Lung Stephen Lee - School of Textile & Fiber Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, U.S.A.

Wallace W. Carr - School of Textile & Fiber Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, U.S.A.

Haskell W. Beckham - School of Textile & Fiber Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, U.S.A.

William J. Wepfer - The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, U.S.A.

Textile Research Journal, Vol. 70, No. 10, 876-885 (2000)

2000

Through-air dryers are widely used for drying unbacked tufted carpets after dyeing- steaming-washing processes. Since the drying rate depends greatly on air velocity, carpet air permeability is a very important parameter affecting drying time. We study the effects of several carpet construction and process parameters on the air permeability of unbacked cut-pile nylon carpets with woven polypropylene primary backing using a modified Frazier air permeability tester and a laboratory through-air dryer. We then present a model predicting pressure drop over the carpets versus apparent velocity.

Astm D737-75, Standard Test Method for Air Permeability of Textile Fabrics.
Brock, J.D., and Gorton, C.W., Through-Flow Drying of Tufted Textile Materials, Textile Res. J. 34, 1-13 (1964).
Carman, P.C., "Flow of Gases Through Porous Media," Academic Press, Inc., NY, 1956.
"Carpets and Rugs," Industrial Brief, vol. 1, no. 15R, Electric Power Research Institute, Palo Alto, CA, 1995. 5. Clayton, F.H., The Measurement of the Air Permeability of Fabrics, J. Textile Inst. 26, T171-T186 (1935).
Davis, N.C., Factors Influencing the Air Permeability of Felt and Felt-Like Structures, Textile Res. J. 28, 318-324 ( 1958).
Dullien, F.A.L., "Porous Media Fluid Transport and Pore Structure," 2nd ed., Academic Press, Inc., San Diego, CA, 1992.
Ghali, K., Jones, B., and Tracy, J., Experimental Techniques for Measuring Parameters Describing Wetting and Wicking in Fabrics, Textile Res. J. 64, 106-111 (1994).
Goglia, M.J. , LaVier, H.W.S., and Brown, C.D., Air Permeability of Parachute Cloths, Textile Res. J. 25, 296-313 ( 1955).
Igwe, G.J.I. , Design of a Simple Gas and Solid Filtration Apparatus, Textile Res. J. 58, 280-285 (1988).
Kothari, V.K. , and Newton, A., The Air-Permeability of Non-Woven Fabrics, J. Textile Inst. 65, 525-531 (1974).
Lord, E., Air Flow Through Plugs of Textile Fibers, Part I: General Flow Relations , J. Textile Inst. 45, T191-T213 ( 1954).
McGregor, R. , The Effect of Rate of Flow on Rate of Dyeing, II: The Mechanism of Fluid Flow Through Textiles and Its Significance in Dyeing, J. Soc. Dyers Colour. 81, 429-438 (1965).
Nossar, M.S. , Chaikin, M., and Datyner, A., High Intensity Drying of Textile Fibers, Part I: The Nature of The Flow of Air Through Beds of Drying Fibers, J. Textile Inst. 64, 594-600 ( 1973).
Perry, R.H., and Green, D.W., "Perry's Chemical Engineers' Handbook," 7th ed., McGraw-Hill, NY, 1997.
Rainard, L.W. , Air Permeability of Fabrics, I, Textik Res. J. 16, 473-480(1946).
Rainard, L.W. , Air Permeability of Fabrics, II, Textile Res. J. 17, 167-170 (1947).
Scheidegger, A.E., "The Physics of Flow Through Porous Media ," University of Toronto Press, Toronto, 1960.
Schiefer and Boyland, J. Research Nat. Bur. Standards 28, May 1942.
Van Den Brekel, L.D.M., and De Jong, E. J., Hydrodynamics in Packed Textile Beds, Textile Res. J. 59, 433-440 ( 1989).
Wehner, J.A. , Miller, B., and Rebenfeld, L. Moisture Induced Changes in Fabric Structure as Evidenced by Air Permeability Measurements , Textile Res. J. 57, 247-256 ( 1987).