METHOD FOR MANUFACTURING MULTI-LAYERED FIBROUS WEB AND MULTI-LAYERED FIBROUS WEB

A method for manufacturing a multi-layered fibrous web， which comprises at least two fibrous layers， wherein each of the layer is formed from one or more fibre stocks， the fibrous layers are combined prior to subjecting the multilayered fibrous web to wet-pressing and drying， and in which method at least one layer of the multi-layered fibrous web is formed from the fibre stock comprising at least 50 weight-% of chemi-thermomechanical pulp (CTMP)， hardwood kraft pulp and/or recycled fibre material calculated from the thick stock applied to the particular layer approach system， and to which fibre stock is added a first strength component and a second strength component， wherein the first strength component is a cationic strength agent and the second strength component comprises a synthetic amphoteric polymer composition having a net charge from -3 to +1 meq/g (dry)， at pH 7.