| 摘要 |
A rectangular, absorbent, disintegratable multi-ply sheet, with at least three layers and based on cellulosic wadding, has a specific K(NOVE) coefficient (defined mathematically in terms of strength, area weight, thickness, flexibility, absorption, surface and thickness). The sheets are typically produced by chemically and mechanically combining separately and differently goffered layers. A near rectangular, absorbent, disintegratable multi-ply sheet, with at least three layers and based on cellulosic wadding, has a K(NOVE) coefficient value of more than 45000, where KNOVE = R(SM) x R(ST) x A x S x G x Exp (12 x (E + EP)) x (1/Exp (Sp)). R(ST) = transverse strength in N/m; R(SM) = longitudinal strength in N/m; G = area weight in kg/m2; E = thickness in mm; Sp = flexibility in N; A = absorption in kg per sheet; S = surface in m 2>; EP = average thickness of a layer of the sheet in mm. Independent claims are included for: (1) a roll consisting of a combination of 60-120 of the sheets; (2) a method for producing the sheet, consisting of (a) separately and differently goffering at least three layers forming the sheet, (b) chemically combining the layers using a single adhesion unit and (c) mechanically combining the layer using a pressing cylinder; and (3) an alternative method for producing the sheet, involving (a) projecting a set of papermaking fibers onto a cloth under wet conditions to form a pad, (b) transferring the pad onto the surface of a porous drying cylinder, to be contacted with air jets emanating from the cylinder, (c) transferring the obtained layer onto a crimping cylinder and (d) combining several layers independently formed by steps (a) - (c) during an operation of conversion by mechanical deformation. |
