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US 2020/0002893 A1Published application
Pre-mix useful in the manufacture of a fiber based product
AssigneeStora Enso OYJ
InventorsKaj Backfolk, Isto Heiskanen, Esa Saukkonen
Life of this patent
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Abstract
The present invention relates to a process wherein microfibrillated cellulose (MFC) is mixed with at least two retention aids, selected from a cationic or amphoteric polymer and a microparticle or nanoparticle as a pre-mix before dosing it to the stock in a process for manufacture of a fiber based product.
Claims9
A process for the production of a fiber based product comprising the step of preparing a pre-mix comprising:
- a) microfibrillated cellulose, wherein the amount of the microfibrillated cellulose is 0.1 kg to 50 kg per ton dry furnish;
- b) cationic or amphoteric polymer, wherein the amount of the cationic or amphoteric polymer is 0.01 kg to 10 kg per ton dry furnish;
- c) microparticles or nanoparticles, wherein the amount of microparticles or nanoparticles is 0.01 kg to 10 kg per ton dry furnish;
- and dosing said pre-mix to a stock in a process for manufacture of a fiber based product.
1 more element
Dependencies are inferred from the claim text.