Cellulosic fiber material and process

A method for manufacturing a cellulosic fiber substrate comprising at least one top surface and at least one bottom surface, the method comprising:

• a) providing at least one sheet of cellulosic fibers having a maximum length of 10 mm;
• b) impregnating the at least one sheet of cellulosic fibers with a mix of an acidic curing catalyst and a binding agent selected from the group consisting of:
• cellulose, hemicellulose, furan, lignin and combinations thereof, to obtain at least one sheet of impregnated cellulosic fibers;
• c) pre-curing the at least one sheet of impregnated cellulosic fibers by applying heat in a range of 50-300° C., to obtain one or more prepregs;
• d) arranging the one or more prepregs in a stack;
• and
• e) pressing said stack in a pressing tool at a pressure of at least 7 kg/cm2 and a temperature of at least 60° C. during a time period of at least 10 seconds, to obtain the cellulosic fiber substrate having the at least one top surface and the at least one bottom surface,
• wherein said cellulosic fiber substrate includes
• 60 to 90 wt % of said cellulosic fibers,
• 0 to 10 wt % of said acidic curing catalyst, and
• 10 to 40 wt % of said binding agent.