Patent ID: 6675702
Filing Date: 2004-01-13
Classification: D04H

Abstract:
A method for producing an absorbent fiber web which is tear resistant, and rollable, from cellulose fibers, cellulose pulp or of wood pulp cardboard without the use of additional binding agents, where said fiber web is suitable for use in the hygiene sector comprising the following processing steps:(a) providing an irregular cellulose fiber layer and pre-condensing it under relatively low pressure to produce a loose non-woven with low density and tear strength; and (b) providing a pair of calender rolls having a pattern of point or line-shaped sluds, defining a gap therebetween, and inserting the loose non-woven into the gap of the calender rolls that is used to create a pattern of point- or line-shaped pressure zones under relatively high pressure, where the irregularly arranged fibers are pressed onto each other, wherein (1) the loose non-woven has a moisture content of up to 5 percent by weight when it is inserted, (2) the irregularly arranged fibers are pressed onto each other under a pressure in a range between 250 and 600 MPa such that non-separating fusion of the fibers occurs and a fiber web with an embossing pattern is created, and (3) the tear strength of the fiber web is at least 0.12 kN/m.