Multi-ply liner with washed NSSC pulp

A method for manufacturing a multi-ply liner for use in food or beverage packaging material, comprising the steps of:

• a) forming a first web layer from a first pulp suspension and dewatering said first web layer to obtain a first ply;
• b) forming a second web layer from a second pulp suspension and dewatering said second web layer to obtain a second ply on the first ply;
• wherein said first pulp suspension comprises at least 70 wt % unbleached kraft pulp and less than 30 wt % neutral sulfite semi chemical (NSSC) pulp based on dry weight, and
• wherein said second pulp suspension comprises at least 50 wt % NSSC pulp and less than 50 wt % unbleached kraft pulp based on dry weight, and
• wherein said NSSC pulp in the second pulp suspension is a washed NSSC pulp which has an ash content of less than 1.8 wt %, as determined according to standard ISO 1762:2019.