Absorbent core and absorbent article comprising the same

The absorbent core with separate SAP types and controlled permeability layers enhances absorption speed, capacity, and comfort by optimizing fluid distribution and retention, addressing manufacturing cost challenges in airfelt-free designs.

WO2026112880A1 Publication Date: 2026-06-04PROCTER & GAMBLE CO +3
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Patent Information

Application Number
PCT/CN2024/135227
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing absorbent cores in personal hygiene products face challenges in achieving optimal absorption speed, capacity, low rewet, and wearer comfort while maintaining low manufacturing costs, particularly in airfelt-free designs.

Method used

The absorbent core comprises a liquid-permeable top layer, a bottom layer, and intermediate and absorption layers with distinct superabsorbent polymer (SAP) types, where the intermediate layer has controlled SAP permeability and the SAP types are separated by a nonwoven sheet, enhancing absorption efficiency and preventing mixing.

Benefits of technology

This design improves absorption speed, capacity, and wearer comfort while maintaining low manufacturing costs by utilizing SAP with different properties in distinct layers, effectively managing fluid distribution and retention.

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Abstract

The present invention is directed to an absorbent core for use in an absorbent article and an absorbent article comprising the same, the absorbent core comprising a top layer, a bottom layer, an intermediate layer disposed between the top layer and the bottom layer, a first absorption layer disposed between the top layer and the intermediate layer, the first absorption layer comprising first superabsorbent polymer particles "SAP1", and a second absorption layer disposed between the intermediate layer and the bottom layer, the second absorption layer comprising second superabsorbent polymer particles "SAP2", wherein the intermediate layer has at least one of: a SAP permeability no higher than about 1%at static condition as measured according to SAP permeability Test, and a SAP permeability no higher than about 25%at vibration condition for 10 seconds as measured according to SAP permeability Test, and wherein SAP1 is different from SAP2.
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