FIELD: technological processes.
SUBSTANCE: invention is intended for production of sheet with high water-absorption. Method with application of dispersed suspension that contains water-absorbing hard material, which is dispersed in liquid medium on the surface of base sheet, includes formation of layer that contains suspension, which is installed between top and bottom layers, which is supplied into the space between them, at that top layer is flexible coating film, bottom one - base sheet, which moves under specified top layer, and formation of convex-concave relief on the top layer by means of rotation of relief roller in the same direction as the direction of base sheet movement. Roller has convex-concave relief on its surface. Relief application is carried out by means of pressing convex parts of roller to top parts of flexible coating film, the end of which is not fixed. The other variant of the method implementation includes formation of coating layer that contains suspension, on the surface of base by means of installation of rotating relief roller above the base, moving in longitudinal direction sheet through coating film, and by means of continuous supply of dispersed suspension between base sheet and coating film, with rotation of relief roller in the same direction as the direction of base sheet movement. Method also includes formation of the first and second fields on the surface of base sheet. The first one has coating layer of larger thickness, and the second one - coating layer of smaller thickness or practically does not have coating layer, with relief that has been applied with roller through coating film, the end of which is not fixed. Device for method implementation contains mechanism of base sheet movement in longitudinal direction, relief roller, which rotates in respect to horizontal axis, coating film for covering roller surface. The front end of mentioned coating film is installed downstream from the lowest position of rotating relief roller. Facility of suspension supply is installed between coating film and base sheet. Device provides formation of the first field with coating layer of larger thickness on the surface of base sheet, and second filed with coating layer of smaller thickness or almost without this layer.
EFFECT: permits to produce sheets with high water-absorption, with sufficient flexibility in longitudinal and transverse directions and higher coefficient of liquid diffusion.
22 cl, 18 dwg
