US 11,987,932 B2
Method for producing pulp fibers for cellulose nanofiberization, and pulp fibers for cellulose nanofiberization
Takayoshi Konishi, Kanonji (JP); Toshio Hiraoka, Kanonji (JP); and Noritomo Kurita, Kanonji (JP)
Assigned to UNICHARM CORPORATION, Ehime (JP)
Filed by Unicharm Corporation, Ehime (JP)
Filed on Jan. 12, 2023, as Appl. No. 18/153,410.
Application 18/153,410 is a division of application No. 16/626,983, abandoned, previously published as PCT/JP2018/018175, filed on May 10, 2018.
Claims priority of application No. 2017-126793 (JP), filed on Jun. 28, 2017.
Prior Publication US 2023/0160142 A1, May 25, 2023
Int. Cl. D21C 5/02 (2006.01); A61L 2/18 (2006.01); A61L 11/00 (2006.01); B09B 3/00 (2022.01); B09B 3/80 (2022.01); B29B 17/02 (2006.01); B29L 31/48 (2006.01); D21H 11/14 (2006.01)
CPC D21C 5/022 (2013.01) [A61L 2/183 (2013.01); A61L 11/00 (2013.01); B09B 3/0075 (2013.01); B09B 3/80 (2022.01); B29B 17/02 (2013.01); D21H 11/14 (2013.01); B29B 2017/0293 (2013.01); B29L 2031/4878 (2013.01)] 3 Claims
OG exemplary drawing
 
1. Pulp fibers for cellulose nanofiberization which derive from used hygiene products that include pulp fibers and super absorbent polymers, wherein the pulp fibers for cellulose nanofiberization have a lignin content ratio of 0.1 mass % or less and a water contact angle of 20° or less.