Installation and method for producing a single- or multi-layer nonwoven

A method for producing a two-ply or three-ply nonwoven comprising:

• producing in an inclined wire former a web of wet-laid fibrous material consisting of 70%-95% by weight of pulp and 30%-5% by weight of solvent-spun cellulose fibers;
• and
• selectively forming the two-ply non-woven by performing one of the following steps (A) and (B) or forming the three-ply nonwoven by performing both of the following steps (A) and (B):
• (A) depositing a carded nonwoven on the web of wet-laid fibrous material from a card arranged above and downstream in a material transport direction from the inclined wire former;
• and
• (B) introducing a further web on the web of wet-laid fibrous material from either an unwinding station or a further card located upstream of or below the inclined wire former;
• wherein each of the carded nonwoven and the further web in steps (A) and (B) consist of 100% by weight of solvent-spun cellulose fibres, or 100% by weight of viscose or 100% by weight of a mixture of solvent-spun cellulose fibres and viscose;
• feeding the two-ply or three-ply nonwoven to a hydroentangler for at least one of bonding, entangling and structuring the plys of the two-ply or three-ply nonwoven;
• and
• subsequently drying the two-ply or three-ply nonwoven.