Method for producing a film comprising microfibrillated cellulose, and a film comprising microfibrillated cellulose

A method for producing a film comprising microfibrillated cellulose, wherein the method comprises the steps of:

• providing a suspension comprising between 30 weight-% to 100 weight-% microfibrillated cellulose based on a total dry weight;
• forming a wet web of said suspension by casting on a support, wherein said support is a non-porous support, a paper substrate or a paperboard substrate, wherein said wet web has a dry content of 1-25% by weight;
• wet-pressing said wet web so as to form a dewatered web having a dry content of 15-80% by weight, wherein said wet-pressing comprises applying a press fabric into direct contact with said wet web and conducting said wet web, arranged between said press fabric and said support, through a pressing equipment,
• smoothening said dewatered web so as to form a smoothened web, wherein said smoothening comprises applying at least one smoothing press to said dewatered web arranged on said support, each smoothing press comprises a smoothing element arranged to be in direct contact with said dewatered web, and compressing said dewatered web between said smoothing element and said support, wherein a pressure of 0.1-25 MPa is applied in each smoothing press, wherein said dewatered web has a dry content of 20-60% by weight when said at least one smoothing press is applied, and
• drying said smoothened web so as to form said film.