US 10,889,939 B2
Sizing method for making paper and paper prepared thereof
Zhi Chen, Shanghai (CN); Jinhai Xiao, Hubei (CN); Xiaofeng Zhang, Jiangsu (CN); Kun Hou, Shanghai (CN); James L. Thomas, Naperville, IL (US); and Kaihong Huang, Fujian (CN)
Assigned to ECOLAB USA INC., St. Paul, MN (US)
Appl. No. 16/64,262
Filed by Ecolab USA Inc., St. Paul, MN (US)
PCT Filed Dec. 26, 2016, PCT No. PCT/CN2016/112055
§ 371(c)(1), (2) Date Jun. 20, 2018,
PCT Pub. No. WO2017/108005, PCT Pub. Date Jun. 29, 2017.
Claims priority of application No. 2015 1 0994194 (CN), filed on Dec. 25, 2015.
Prior Publication US 2019/0003125 A1, Jan. 3, 2019
Int. Cl. D21H 21/16 (2006.01); D21H 17/15 (2006.01); D21H 17/66 (2006.01); D21H 17/62 (2006.01); D21H 17/17 (2006.01); D21H 17/28 (2006.01); D21H 17/00 (2006.01); D21H 23/24 (2006.01); D21H 23/26 (2006.01); D21H 23/28 (2006.01); D21H 17/14 (2006.01); D21H 17/70 (2006.01)
CPC D21H 21/16 (2013.01) [D21H 17/14 (2013.01); D21H 17/15 (2013.01); D21H 17/17 (2013.01); D21H 17/28 (2013.01); D21H 17/62 (2013.01); D21H 17/66 (2013.01); D21H 17/70 (2013.01); D21H 17/74 (2013.01); D21H 23/24 (2013.01); D21H 23/26 (2013.01); D21H 23/28 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A sizing method for making paper, the method comprising:
adding alkenyl succinic anhydride to a papermaking furnish in a papermaking process, and
adding an aluminum salt to one or more process steps during the papermaking process via surface treatment,
wherein the surface treatment comprises spraying the aluminum salt onto a surface of a paper sheet in the one or more process steps during the papermaking process, wherein alkenyl succinic anhydride Is not added in the one or more process steps via a surface treatment,
wherein the one or more process steps during the papermaking process are selected from a process step at a forming section of the paper machine, a process step at a multilayer paperboard combining section, a process step at a press section, a process step at a drying section, a process step at a surface sizing section, and a combination thereof,
wherein the aluminum salt is added to the papermaking process in an amount greater than 0.3 kilograms per ton of paper, and the alkenyl succinic anhydride is added in an amount of at least 0.9 kilograms per ton of paper.