EXTRUSION DIE

An extrusion die for extruding a chemical functional additive for making a disposable paper product comprises a supply port and a distribution channel in fluid communication with the supply port. The distribution channel terminate s with at least one discharge mouth having a passage cross-section therethroug h. The discharge mouth comprises an entry orifice having an entry open area Ae, an exit orifice having an exit open area Ax, and a discharge distance define d between the entry orifice and the exit orifice. The exit open area Ax is greater than the entry open area Ae. This ensures that contaminants would pa ss through the discharge mouth, whereby plugging thereof is substantially avoided. Preferably, the passage cross-section of the discharge mouth continuously and gradually increases from the entry orifice to the exit orifice.