Back to results
US 11,453,978 B2Granted
Process for surface sizing using a jet cooked dispersion comprising microfibrillated cellulose, starch and pigment and/or filler
AssigneeStora Enso OYJ
InventorsErik Mansson, Philip Hakansson
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for improved surface sizing in the manufacture of paper or board products. According to the present invention, an aqueous dispersion of microfibrillated cellulose (MFC), starch and pigments or fillers is treated by jet cooking and then used for surface sizing in a process for manufacturing a paper or board product.
Claims15
A process for surface sizing comprising the steps of:
- a) providing an aqueous dispersion consisting essentially of microfibrillated cellulose, starch and pigment and/or filler, wherein the microfibrillated cellulose has a Schopper Riegler value(SR°) of more than 85 SR°;
- b) jet cooking the dispersion of step a);
- and
- using the product obtained after the jet cooking of step b) for surface sizing in a process for the manufacture of a paper or board product.
1 more element
A process comprising the steps of:
- a) providing an aqueous dispersion consisting essentially of microfibrillated cellulose, starch and pigment and/or filler wherein the microfibrillated cellulose has a Schopper Riegler value (SR°) of more than 85 SR°;
- b) jet cooking the dispersion of step a) to providing a surface sizing coating;
- c) providing a base paper comprising filler in an amount of at least 20 wt %, wherein the filler of the base paper comprises calcium carbonate;
- and, d) applying the surface sizing coating obtained in step b) on the base paper.
1 more element
Dependencies are inferred from the claim text.