Heterocapillarity of Nonwoven Cloth in Different Production Stages

The effect of the processing stages in production of nonwoven material on the size and position of its capillaries in the bulk of the material was investigated; a decrease in the capillary diameter as the needle-punching density increases was found. It was shown that nonwovens are characterized by a communicating system of capillaries. Heat treatment decreases the capillary diameter to 100-130 μm and causes the appearance of closed capillaries inaccessible to filling with sorbate. The optimum areas of application of nonwovens obtained in different production stages were determined.