A research on the air permeability of needlepunched nonwovens made from sheep wool fibers

Air permeability is one of the important properties affecting the quality of insulation materials. This property is related to the passage of air through the fabric. This article presents the method of measuring airflow resistance according to Frazier. And also the dependence of air permeability index on such parameters as: density and thickness is given. Insulating mats made by needle-punching method from coarse and semi-coarse wool of Kazakhstani sheep breeds were used in the work. The main parameters of mats were determined: thickness, density, air permeability. It is established that 4-layer mats with згтсрштп density of 600 rpm have the lowest value of air permeability.

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