NONWOVEN MATERIAL WITH IMPROVED SOFTNESS AND BARRIER PROPERTIES Russian patent published in 2003 - IPC

FIELD: manufacture of nonwoven materials. SUBSTANCE: nonwoven material is produced by aerodynamic method from melt by drawing basic nonwoven material for value of about 1-35% of its initial length in at least one direction, with lengthening distance not in the excess of 88.9 cm. According to another embodiment, nonwoven material is also produced by aerodynamic method from melt by drawing it in at least one direction, with lengthening distance not in the excess of 88.9 cm, and by multiple drawing stages. Combined laminated material has two outer layers of nonwoven materials produced by ejecting with high-speed air flow and combined with inner layer of material produced by aerodynamic method from melt (material of SMS type). Resultant material has weight per unit of area not in the excess of 50.87 g/sq.m and water column head pressure resistance of at least 73 mbar. EFFECT: improved softness, tensile strength and barrier properties with regard to moisture penetration. 36 cl, 4 dwg, 6 tbl