| abstract |
FIELD: manufacturing technology. n SUBSTANCE: composite sheet (1) by present invention represents sheet, in which like non-woven fabric fibre unit (12) is integrated in one or both sides of cellular sheet or heat-bonded non-woven fabric, which serves as frame material (11), in state where fibres (13), forming fibres unit are woven with each other and also with frame material (11). Composite sheet (1) according to present invention is given three-dimensional uneven geometric shape so, to have multiple projections (2) and recesses (3), and fibers unit (12) forming fibres (13) are lifted from projections (2) and recesses (3) surfaces. Composite sheet (1) according to present invention has ratio of composite fibres number, which are lifted from recesses surface and have height of 1 mm or more, to composite fibres number, which are lifted from recesses surface and have height of 0.1 mm or more, of 25 % or more. n EFFECT: disclosed is composite sheet and method of its production. n 18 cl, 3 tbl, 22 dwg |