US 12,077,650 B2
Foam assisted drying process of nano- and microfibrillated cellulose
Karita Kinnunen-Raudaskoski, Espoo (FI); Tuomo Hjelt, Espoo (FI); and Jani Lehmonen, Espoo (FI)
Assigned to Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
Appl. No. 17/297,091
Filed by Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
PCT Filed Nov. 22, 2019, PCT No. PCT/FI2019/050836
§ 371(c)(1), (2) Date May 26, 2021,
PCT Pub. No. WO2020/109657, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 20185996 (FI), filed on Nov. 26, 2018.
Prior Publication US 2022/0025147 A1, Jan. 27, 2022
Int. Cl. C08J 9/28 (2006.01); C08J 9/00 (2006.01); C08J 9/30 (2006.01); D21H 11/18 (2006.01); D21H 21/56 (2006.01)
CPC C08J 9/28 (2013.01) [C08J 9/0023 (2013.01); C08J 9/0033 (2013.01); C08J 9/30 (2013.01); D21H 11/18 (2013.01); D21H 21/56 (2013.01); C08J 2201/0502 (2013.01); C08J 2301/02 (2013.01)] 20 Claims
 
1. A method for drying nano- or micro-fibrillated cellulose comprising at least the steps of:
mixing together unmodified or modified nano- or micro-fibrillated cellulose and a foaming agent and foaming the mixture,
spreading the foamed mixture on a substrate that does not adhere to the foamed mixture and does not absorb into the foamed mixture, and
drying the foamed mixture.