Dosing of nanocellulose suspension in gel phase
AssigneesStora Enso OYJ, Wetend Technologies Oy
InventorsEsa Saukkonen, Isto Heiskanen, Kaj Backfolk, Jouni Matula, Jussi Matula
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Abstract
A method of dosing a nanocellulose suspension in gel phase into a second suspension, wherein the method comprises the steps of: providing said nanocellulose suspension in gel phase; providing said second suspension; bringing said nanocellulose suspension in gel phase in contact with said second suspension; wherein the method comprises a step of subjecting said nanocellulose suspension in gel phase to a shear rate of more than 500 l/s, simultaneously with and/or immediately prior to the step of bringing said nanocellulose suspension in gel phase and said second suspension in contact with each other.
Claims15
A method of dosing a nanocellulose suspension in gel phase into a second suspension, wherein the method comprises the steps of:
- providing said nanocellulose suspension in gel phase;
- providing said second suspension wherein said second suspension is selected from a cellulose stock solution, a coating composition and a surface sizing composition;
- carrying out a high shear rate treatment step comprising subjecting said nanocellulose suspension in gel phase to a shear rate of more than 500 1/s in a high shear mixing device, wherein said nanocellulose suspension in gel phase is brought to a fluidized state through said high shear rate treatment step;
- and
- bringing said nanocellulose suspension in gel phase and said second suspension in contact with each other within less than 1 second of said high shear rate treatment step
- wherein said high shear mixing device is any one of a modified Trump jet apparatus, high pressure liquid injection apparatus, ultrasound apparatus, and a high pressure drop apparatus.
Dependencies are inferred from the claim text.