Flexible Elastic Absorbent Core With Reverse Osmosis Control
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Solution Overview
Problem
Existing absorbent articles suffer from fluid accumulation, slow infiltration, and reverse osmosis issues due to inadequate design and material combinations, leading to bulges and inefficient absorption.
Innovation Solution
An absorbent core body utilizing a basic skeleton layer with vertically distributed fibers and an anti-reverse osmosis layer with irregularly distributed fibers, combined with a functional layer for rapid infiltration and guided absorption, preventing reverse osmosis through vertical diversion and horizontal disorderly isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional top sheet and acquisition layer are used, then fluid absorption is achieved, but fluid accumulation and reverse osmosis occur causing bulges and slow infiltration
Solution Approach 1:
The absorbent core body is divided into multiple functional layers: a top sheet with first through fourth edges, an acquisition layer with discrete acquisition areas positioned away from edges, and a distribution layer. This segmentation prevents fluid accumulation at edges while maintaining rapid absorption through the distributed structure.
Solution Approach 2:
Different regions of the absorbent article are given different properties: the acquisition layer has hydrophilic acquisition areas for rapid fluid uptake in specific zones, while edge regions have hydrophobic or low-absorption characteristics to prevent reverse osmosis. The distribution layer provides localized fluid routing to prevent accumulation.
2Speed
If the acquisition layer is positioned close to the top sheet, then rapid absorption is achieved, but fluid accumulation and bulging occur
Solution Approach 1:
The distribution layer is positioned between the acquisition layer and the core to pre-distribute fluid before it reaches the bulk absorbent material. This preliminary distribution prevents localized accumulation and bulging while maintaining rapid infiltration through the acquisition layer's proximity to the top sheet.
3Reliability
If the top sheet is made hydrophobic to prevent reverse osmosis, then fluid residue is reduced, but fluid accumulation areas form between layers
Solution Approach 1:
The distribution layer acts as an intermediary between the hydrophobic top sheet and the hydrophilic acquisition layer. It receives fluid from the acquisition layer and distributes it laterally, preventing accumulation while the top sheet's hydrophobicity prevents reverse osmosis. This mediator layer resolves the conflict between edge prevention and fluid management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides rapid absorption, reduced residual fluid accumulation, no surface seepage, enhanced strength after absorption, and a more comfortable feel, ensuring the absorbent core remains dry and soft.
Implementation Method 1
at least one basic skeleton layer made from hosiery yarn with at least part of its fibers being vertically distributed fibers, at least one anti-reverse osmosis layer which is located above the basic skeleton layer with its fibers irregularly distributed in the horizontal direction
Implementation Method 2
the fibers of the basic skeleton layer and the fibers of the anti-reverse osmosis layer have been hydrophilically treated
Implementation Method 3
at least one functional layer for absorbing and locking fluid which is located below the basic skeleton layer
Implementation Method 4
the fibers of the basic skeleton layer and the fibers of the anti-reverse osmosis layer have been hydrophilically treated
Data Source
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AI summary
An absorbent core body for rapidly infiltrating, flow guiding, absorbing, and preventing reverse osmosis. The absorbent core body utilizes flow guiding in a vertical direction and disordered isolation in a horizontal direction to prevent reverse osmosis. The absorbent core body comprises: at least one basic framework layer (1) formed by knitted yarns, the fibers of which are at least vertically distributed; at least one functional layer (3) which is located below the basic framework layer (1), is compounded by means of physical weaving or subjected to physical heat sealing, and absorbs and locks a liquid; and at least one anti-reverse osmosis functional layer (4) which is located above the basic framework layer (1), the fibers of which are irregularly distributed in the horizontal direction, and which is formed by anti-reverse osmosis yarns. The fibers of the basic framework layer (1) and the fibers of the anti-reverse osmosis functional layer (4) are both subjected to lyophilic treatment. The absorbent core body can be applied to personal and medical nursing products.