公开(公告)号：US10806640B2

公开(公告)日：2020-10-20

申请号：US15471281

申请日：2017-03-28

Applicant: BASF SE

Inventor： Norbert Herfert ,  Somjate Sonkaew ,  Thomas Daniel ,  Tanyatorn Sitkhunthod

IPC: A61F13/53 ,  A61L15/22 ,  A61L15/24 ,  A61L15/60 ,  A61L15/58

Abstract: An absorbent core and an absorbent article respectively with improved properties, especially rewet performance, are disclosed. The absorbent core has at least two layers, wherein each layer comprising from 0 to 10% by weight fibrous material and from 90 to 100% by weight water-absorbent polymer particles, based on the sum of water-absorbent polymer particles and fibrous material. The surface-postcrosslinked water absorbent polymer particles within the upper layer have a sphericity of at least 0.89 and a CRC of at least 34 g/g. Preferably the water-absorbent polymer particles have a sphericity of at least 0.89 and the sum of the CRC and AUL (0.3 psi, 21 g cm−2) (EDANA 442.2-02) of the water absorbent polymer particles is at least 65 g/g.

公开(公告)号：US20170281425A1

公开(公告)日：2017-10-05

申请号：US15471835

申请日：2017-03-28

Applicant: BASF SE

Inventor： Norbert Herfert ,  Somjate Sonkaew ,  Thomas Daniel ,  Tanyatom Sitkhunthod

IPC: A61F13/535 ,  A61F13/539 ,  B01J20/26

CPC classification number: A61F13/535 ,  A61F13/534 ,  A61F13/539 ,  A61F2013/530481 ,  A61F2013/530489 ,  A61F2013/530591 ,  A61F2013/53908 ,  A61F2013/53991 ,  B01J20/261 ,  B01J20/267

Abstract: Absorbent core and an absorbent article respectively with improved properties, especially rewet performance, are disclosed. The absorbent core contains at least two layers, wherein each layer has from 0 to 10% by weight fibrous material and from 90 to 100% by weight water-absorbent polymer particles, based on the sum of water-absorbent polymer particles and fibrous material. The surface crosslinked water absorbent polymer particles within the upper layer have a sphericity of at least 0.89 and the absorbent core shows a CRCAP/TACAP ratio of at least 0.65.

公开(公告)号：US20170281422A1

公开(公告)日：2017-10-05

申请号：US15471281

申请日：2017-03-28

Applicant: BASF SE

Inventor： Norbert Herfert ,  Somjate Sonkaew ,  Thomas Daniel ,  Tanyatorn Sitkhunthod

IPC: A61F13/53 ,  A61L15/58 ,  A61L15/60 ,  B32B5/02 ,  A61L15/22 ,  B32B37/12 ,  B32B7/12 ,  B32B38/00 ,  A61F13/15 ,  A61L15/24

Abstract: An absorbent core and an absorbent article respectively with improved properties, especially rewet performance, are disclosed. The absorbent core has at least two layers, wherein each layer comprising from 0 to 10% by weight fibrous material and from 90 to 100% by weight water-absorbent polymer particles, based on the sum of water-absorbent polymer particles and fibrous material. The surface-postcrosslinked water absorbent polymer particles within the upper layer have a sphericity of at least 0.89 and a CRC of at least 34 g/g. Preferably the water-absorbent polymer particles have a sphericity of at least 0.89 and the sum of the CRC and AUL (0.3 psi, 21 g cm−2) (EDANA 442.2-02) of the water absorbent polymer particles is at least 65 g/g.