AIR DRAG OF NEEDLE-PUNCH FILTER MATERIAL

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Abstract

The effect of filter material manufacturing technology on its initial air drag is a function of the choice of the criterion used for assessing the structure of the materials to a great degree. When the surface density is used as a structural characteristic, the initial drag of needle-punch cloth and modified materials is described by a common curve. Additional research is necessary for determining the optimum method of thermal modification that would ensure manufacture of materials with adjustable initial drag.

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