PROCESS FOR THE PRODUCTION OF A MULTILAYER FIBER WEB FROM CELLULOSE FIBERS

摘要

The invention relates to the production of a multi layer fiber web from c ellulose fibers by separately feeding of at least two different fiber suspen sions and water into a multi layer head box, wherein separating elements sep arate them from each other and from the water. After leaving the nozzle mout h of the head box, they are transported to a device on which a web is formed . The water is guided in a way, such that it ends up in form of a layer betw een two layers of fiber suspensions on the web forming device after exiting the nozzle mouth and thus prevents mixing of the different fiber suspensions . At least one retention agent and/or at least one dehydrating agent is dose d to the fiber suspension and/or to the added water to increase the retentio n, dehydration and formation.