Method for producing a solid cellulose foam, a solid cellulose foam, and use thereof

A method for producing a solid cellulose foam having a height hs, a length ls, and a width ws, wherein the method comprises the steps of:

• a) providing a first wet cellulose foam;
• b) depositing the first wet cellulose foam on a surface, so as to obtain a first wet foam deposition having a height h1W, a length l1W, a width w1W, a top surface and a bottom surface;
• c) forming pillars in the first wet foam deposition by providing the top surface of the first wet foam deposition with cutting lines extending at least partially through the height h1 of the first wet foam deposition;
• d) drying the first wet foam deposition so as to obtain a first solid foam deposition comprising the pillars separated by gaps, wherein the gaps are formed along the cutting lines, and wherein the first solid foam deposition has a height h1S, a length l1S, a width w1S, a top surface and a bottom surface;
• e) providing a second wet cellulose foam;
• f) depositing the second wet cellulose foam so as to obtain a subsequent wet foam deposition that fills the gaps between the pillars in the first solid foam deposition;
• and,
• g) drying the second wet foam deposition so as to obtain a solid cellulose foam comprising pillars of the first solid foam deposition and the subsequent solid foam deposition filling the gaps between the pillars.