3D-formable sheet material

3D-formable sheet material, characterized by comprising:

• (a) a cellulose material in an amount from 15 to 55 wt.-%, based on the total dry weight of the 3D-formable sheet material, wherein the cellulose material is a cellulose material mixture comprising:
• (i) microfibrillated cellulose in an amount of ≥55 wt.-%, based on the total dry weight of the cellulose material mixture, and
• (ii) cellulose fibres in an amount of ≤45 wt.-%, based on the total dry weight of the cellulose material mixture,
• and the sum of the amount of the microfibrillated cellulose and the cellulose fibres is 100 wt.-%, based on the total dry weight of the cellulose material mixture, and
• (b) at least one particulate inorganic filler material in an amount of 45 wt.-% to 85 wt.-%, based on the total dry weight of the 3D-formable sheet material,
• wherein the sum of the amount of the cellulose material and the at least one particulate inorganic filler material is 100.0 wt.-%, based on the total dry weight of the cellulose material and the at least one particulate inorganic filler material;
• wherein the 3D-formable sheet material has:
• (x) a normalized stretch increase per level of moisture content in the range from 0.15 to 0.7% per percent moisture, and
• (y) an elongation at break of at least 6%, and
• (z) a sheet weight from 50 to 500 g/m2.