US 12,077,915 B2
Nanocellulose-reinforced corrugated medium
Theodora Retsina, Atlanta, GA (US); Kimberly Nelson, Atlanta, GA (US); Lee Hill, Atlanta, GA (US); Vesa Pylkkanen, Atlanta, GA (US); and Timothy J. Galliford, Newnan, GA (US)
Assigned to GranBio Intellectual Property Holdings, LLC, Thomaston, GA (US)
Filed by GranBio Intellectual Property Holdings, LLC, Minnetrista, MN (US)
Filed on Jun. 10, 2022, as Appl. No. 17/837,144.
Application 16/591,666 is a division of application No. 15/583,208, filed on May 1, 2017, granted, now 10,435,841, issued on Oct. 8, 2019.
Application 17/837,144 is a continuation of application No. 16/591,666, filed on Oct. 3, 2019, granted, now 11,359,334, issued on Jun. 14, 2022.
Claims priority of provisional application 62/331,429, filed on May 3, 2016.
Prior Publication US 2023/0002972 A1, Jan. 5, 2023
Int. Cl. D21H 11/16 (2006.01); D21C 1/02 (2006.01); D21C 3/04 (2006.01); D21C 3/20 (2006.01); D21C 9/00 (2006.01); D21H 11/02 (2006.01); D21H 11/08 (2006.01); D21H 11/18 (2006.01); D21H 27/40 (2006.01)
CPC D21H 11/16 (2013.01) [D21C 1/02 (2013.01); D21C 3/04 (2013.01); D21C 3/20 (2013.01); D21C 9/007 (2013.01); D21H 11/02 (2013.01); D21H 11/08 (2013.01); D21H 11/18 (2013.01); D21H 27/40 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A process for producing a corrugated medium pulp composition, said process comprising:
(a) obtaining a first pulp from a steam or hot-water extraction of a first amount of lignocellulosic biomass;
(b) further processing said first pulp to produce a corrugated medium product;
(c) obtaining a second pulp from fractionation of a second amount of lignocellulosic biomass in the presence of an acid catalyst, a solvent for lignin, and water; and
(d) mechanically treating said second pulp to generate nanocellulose, wherein said nanocellulose is lignin-coated hydrophobic nanocellulose,
wherein at least a portion of said nanocellulose is introduced to said corrugated medium product (i) directly to said first pulp, prior to step (b), (ii) directly to said corrugated medium product, after step (b), (iii) during step (b), or any combination thereof,
wherein said first pulp is not exposed to said acid catalyst from step (c) or said solvent for lignin from step (c),
and wherein said second pulp is not subjected to steam or hot-water extraction.