Multi-layered paper web i.e. multi-layered copying paper web, manufacturing method, involves regulating tension length ratio of web in z-direction by changing mixing concentration of mixing current in fiber suspension layer

摘要

#CMT# #/CMT# The method involves distributing fiber suspensions (2.1, 2.2) in partial currents (6.1, 6.2) over a machine width (B) of a multi-layered flowbox (1) e.g. two-layered flowbox, with machine-width distribution devices in fiber suspension layers (7.1, 7.2). The partial current (6.1) of the fiber suspension layer (7.1) is supplied to regulate supply current (8.1) during production of mixing current with a mixing concentration (Cm). A tension length ratio of a multi-layered paper web in a z-direction is regulated by changing the mixing concentration in the suspension layer (7.1). #CMT# : #/CMT# Independent claims are also included for the following: (1) a multi-layered flowbox for manufacturing a multi-layered paper web (2) a system for manufacturing a multi-layered paper web. #CMT#USE : #/CMT# Method for manufacturing a multi-layered paper web i.e. multi-layered copying paper web. #CMT#ADVANTAGE : #/CMT# The tension length ratio of the multi-layered paper web in the z-direction is regulated by changing the mixing concentration of the mixing current in the fiber suspension layer, thus providing the sheet structure with optimal copying characteristics by different consistencies within a single situation, and hence avoiding machine-structural expenditure of a rigid separative element between the individual situations. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a multi-layered flowbox. Cm : Mixing concentration B : Machine width 1 : Multi-layered flowbox 2.1, 2.2 : Fiber suspensions 6.1, 6.2 : Partial currents 7.1, 7.2 : Fiber suspension layers 8.1 : Supply current.