The results of experiments using needle-bonded polypropylene fibers as filter fabrics show that the air permeability of the filter fabrics depends on the type and size of needles used for fabric construction. For dust filtration, the internal structure of the filter fabrics has an effect on the resultant collection capacity based on the air permeability. A new gas and dust filtration apparatus was designed for the investigation, and the results obtained are reproducible. A regression analysis produced high correlations between pressure drop and air flow rates, which are statistically valid at a significance level of 0.1%.
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References
1.
ClaytonF. H., The Measurement of the Air Permeability of Fabrics, J. Textile Inst.26, T171–T186 (1935).
2.
DavisN. C., Factors Influencing the Air Permeability of Felt-Like Structures, Textile Res. J.28, 318–324 (1938).
3.
DarcyH., Les Fontaines Publiques de la Ville de Dijon, Exposition et Application à Suivre et des Formules à Employer dans les Questions de Distribution d'Etau, Victor Dalamont, Paris, 1856.
4.
DavisW. T.La RosaP. J.NollK. E., The Generation and Evaluation of Fabric Filter Curves from Pilot Plant Data, Filtr. Sep.13, 555 (1976).
5.
DechantJ., Air-permeability of Textile Fabrics (in German), Faserforsch. Textiltech.7, 510–515 (1956).
6.
DentR. W., “Nonwovens 1971’, Lennox-KerrP., Ed., Textile Trade Press, Manchester, 1971, p. 190.
7.
DentR. W., Air Permeability of Nonwoven Fabrics, J. Textile Inst.67, 220 (1976).
8.
GogliaM. J.La VierH. W. S.BrownC. D., Air Permeability of Parachute Cloths, Textile Res. J.25, 296–313 (1955).
9.
IgweG. J. I.SmithP. A., The Influence of Some Production Parameters on the Characteristics of Needle Felts for Air Filtration, Melliand Int. Textile Rep.8, 545, 626–629 (1985).
10.
IgweG. J. I.SmithP. A., Effect of Increasing Needling Densities on Collection Capacity and Filtration Efficiency, Melliand Int. Textile Rep.9, 256, 624–626 (1986).
11.
IgweG. J. I.SmithP. A., The Influence of Some Production Parameters on the Characteristics of Needle felts for Gas Filtration, J. Textile Inst.77 (4), 263–266 (1986).
12.
IgweG. J. I.SmithP. A., Effect of Depths of Needle Penetration on Dust Collection and Filtration Efficiency, Melliand Int. Textile Rep.10, 287, 703–705 (1986).
13.
IgweG. J. I.AllenT., Advances in Gas Permeability Measurements, J. Chem. Eng. Technol.10 (2), 86–92 (1987).
14.
KothariV. K.NewtonA., The Air Permeability of Nonwoven Fabrics, J. Textile Inst.65, 525 (1974).
15.
LichteneckerK., Physik, Z.115 (1926).
16.
LordJ., The Determination of the Air Permeability of Fabrics, J. Textile Inst.50, T569–T582 (1959).
17.
MarschM. C., Some Notes on the Permeability of Fabrics to Air, J. Textile Inst.22, T56–T63 (1931).
18.
MehrotraA. K., Masters thesis, Leeds University, 1977.
19.
RainardL. W., Air Permeability of Fabrics I, Textile Res. J.17, 167–170 (1947).
20.
RainardL. W., Air Permeability of Fabrics, II, Textile Res. J.17, 167–170 (1947).
21.
SieminskiM. A.HotteG. H., The Permeability of Fabrics, Rayon Textile Mon.26, 68–70 (1945).
22.
SieminskiM. A.HotteG. H., The Permeability of Fabrics, Rayon Textile Mon.26, 61–62 (1945).
