Method of manufacturing a film comprising highly refined cellulose fibers

A method for manufacturing a film comprising highly refined cellulose fibers in a paper-making machine, the method comprising the steps of:

• a) forming a wet web by applying a pulp suspension comprising at least 50% by dry weight of highly refined cellulose fibers having a Schopper-Riegler (SR) value in a range of 80-100 from a headbox onto a moving wire and partially dewatering the wet web on the wire to form a partially dewatered web;
• b) feeding the partially dewatered web from the wire into a dewatering nip formed between a suction roll and a lump breaker roll to further dewater the partially dewatered web;
• c) optionally further dewatering the partially dewatered web from the dewatering nip in a press section;
• and
• d) drying the partially dewatered web in a drying section to obtain a film comprising the highly refined cellulose fibers.