The introduction of fiber-free Foumu to the head box or near the head box of Foumu processing web during manufacture

摘要

(57) In Foumu deposition process for manufacturing a nonwoven web of (cellulosic fibers or synthetic fibers, for example) [Abstract] fiber material, the various points of the head box or near the head box to Foumu of a fiber-free virtually it is possible to obtain better, by introducing performance. In (immediately before, for example), by injecting only Foumu to Foumu / fiber mixture in the basis weight distribution of the nonwoven web to be produced can be equalized more near where Foumu / fiber mixture is introduced into the headbox (variations in the basis weight of 0.5% or less, for example) that. By introducing Foumu flow of another fiber-free de facto head box, to the place of the surface away from the perforated member, (Usually, parallel to the flow of Foumu / fiber mixture) Foumu along the surface By the to flow, it is possible to minimize the shear stress of the fibers in the headbox, the fibers in the surface is kept clean to become in one direction the direction of movement of the perforated member and also, without thereby become.