Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020201627 - METHOD FOR MANUFACTURING FILMS FROM HIGH CONSISTENCY NANOCELLULOSE SUSPENSIONS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS:

1. A method for manufacturing films from nanocellulose, characterized in comprising at least the following steps:

feeding modified or unmodified nanocellulose, with or without additives, at at least 5 wt.% total solids, between two substrates, wherein at least one substrate is porous, to obtain a multi-layered structure,

passing the multi-layered structure through one or more nips having controlled gap(s) to form a film.

2. The method according to claim 1, characterized in that the nanocellulose suspensions consists of cellulose nanofibrils (CNF), microfibrillar cellulose (MFC), cellulose nanocrystals (CNC), or bacterial cellulose suspensions, or any mixture of these, in modified or unmodified form.

3. The method according claim 1 or 2, characterized in that the mass percentage of nanocellulose is at least 50% of the total dry mass of the mixture, while rest of the dry mass consists of additives.

4. The method according to any of the preceding claims, characterized in that the consistency of the nanocellulose suspension being used for film production is in the range of 5-60%, preferably at least 10%.

5. The method according to any of the preceding claims, characterized in controlling film thickness by adjusting the nip gaps.

6. The method according to any of the preceding claims, characterized in that the film is dried at ambient conditions or using external heating.

7. The method according to any of the preceding claims, characterized in separating the film from both substrates, keeping it attached to either substrate, or transferring a semi-dry or fully dry film to a third substrate.

8. Use of the film, manufactured according to a method of any of the preceding claims 1 to 7, as a standalone film or in multilayer structures for applications in packaging, electronics, pharmaceuticals, energy storage, construction, cosmetics and hygiene products, filtration and agriculture.