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US 2022/0064390 A1Published application
Process for production of film comprising microfibrillated cellulose
AssigneeStora Enso OYJ
InventorsKaj Backfolk, Isto Heiskanen, Esa Saukkonen
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Abstract
A film comprising microfibrillated cellulose, nanoparticles, and a retention polymer. The nanoparticles are nanosilica nanoparticles that are anionic at neutral or alkaline pH and have at least one dimension less than 100 nm; and the retention polymer is starch. According to the present invention a high amount of nanoparticles is used as an additive, optionally together with a retention polymer.
Claims14
A film comprising:
- microfibrillated cellulose;
- nanoparticles, wherein said nanoparticles are nanosilica nanoparticles that are anionic at neutral or alkaline pH and have at least one dimension less than 100 nm;
- and
- a retention polymer, wherein said retention polymer comprises starch,
- wherein the film has an oxygen transmission rate <200 cc/m2*day measured at 50% RH, 23° C., and a grammage of 10-50 gsm.
2 more elements
A product comprising:
- a surface having a film, wherein the film comprises
- microfibrillated cellulose;
- nanoparticles, wherein said nanoparticles are nanosilica nanoparticles that are anionic at neutral or alkaline pH and have at least one dimension less than 100 nm;
- and
- a retention polymer, wherein said retention polymer comprises starch,
- wherein the film has an oxygen transmission rate <200 cc/m2*day measured at 50% RH, 23° C., and a grammage of 10-50 gsm
3 more elements
Dependencies are inferred from the claim text.