US 12,336,895 B2
Thin fluid absorbent core-absorbent paper
Stephan Bauer, Ludwigshafen (DE); Katrin Baumann, Ludwigshafen (DE); Norbert Herfert, Shanghai (CN); Li Guo Duan, Shanghai (CN); Le Li, Shanghai (CN); Xiao Yan Liu, Shanghai (CN); and Gao Min Sun, Shanghai (CN)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/048,354
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Apr. 9, 2019, PCT No. PCT/EP2019/058925
§ 371(c)(1), (2) Date Oct. 16, 2020,
PCT Pub. No. WO2019/201668, PCT Pub. Date Oct. 24, 2019.
Claims priority of application No. PCT/CN2018/083937 (WO), filed on Apr. 20, 2018; and application No. PCT/CN2019/074788 (WO), filed on Feb. 11, 2019.
Prior Publication US 2021/0169709 A1, Jun. 10, 2021
Prior Publication US 2022/0071818 A9, Mar. 10, 2022
Int. Cl. A61F 13/53 (2006.01); A61L 15/24 (2006.01); A61L 15/60 (2006.01)
CPC A61F 13/53 (2013.01) [A61L 15/24 (2013.01); A61L 15/60 (2013.01); A61F 2013/530591 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fluid absorbent core comprising:
at least one absorption layer, the at least one absorption layer comprising at least 80% by weight of water-absorbent polymer particles,
0 to 10% by weight of an adhesive, and
from 0 to 10% by weight of fibrous material,
wherein the water-absorbent polymer particles within the at least one absorption layer are water-absorbent polymer particles having a vortex of 40 s or less and having a roundness of 0.79 to 0.85 and a centrifuge retention capacity (CRC) of 38 g/g to 85 g/g;
wherein the water-absorbent polymer particles have a free swell capacity (FSC) (1 min) of at least 25 g/g/s.