Microfibrillated film
US10927504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2017 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Aug 9, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D81/34
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of producing a microfibrillated cellulose (MFC) film comprising reinforcement fibers. The method includes: providing a suspension comprising a first MFC in an amount of at least 50 weight %, reinforcement fibers in an amount of at least 5 weight %, all percentages calculated on the total solid content of said suspension, and a formation aid; mixing said suspension to form a mixture; forming a fibrous web from the mixture; and dewatering and/or drying said fibrous web to form a film having a basis weight of less than 40 g/m2, a specific formation number of below 0.45 g0.5/m2, and an Oxygen Transmission Rate (OTR) value of below 100 ml/m2/per 24 hours, preferably of below 50 ml/m2per 24 hours at 50% relative humidity. Also, a film and use of the film in food or liquid packaging applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.