Absorbent Article With Super Absorbent Nonwoven Fabric For Viscous Liquid
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Solution Overview
Problem
Conventional absorbent articles have low absorption speed and high likelihood of leakage for viscous liquids such as muddy or watery feces, leading to prolonged surface presence and potential leakage.
Innovation Solution
Incorporation of a super absorbent nonwoven fabric with high Klemm water absorptiveness on the uppermost surface of the absorber, combined with super absorbent polymer particles, to enhance quick absorption and diffusion of viscous liquids, and a cell absorbing sheet structure with unbounded upper and lower sheets to improve absorption speed and reduce leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional absorber structures are used, then manufacturing cost and simplicity are maintained, but absorption speed of viscous liquid is low and leakage occurs
Solution Approach 1:
The absorber is divided into multiple functional layers: a first absorber layer containing SAP particles for rapid initial absorption, and a second absorber layer with different fiber composition for continued absorption. This segmentation allows each layer to specialize in specific absorption tasks, improving overall absorption speed while managing complexity through functional division.
Solution Approach 2:
The patent uses composite nonwoven fabrics combining different fiber types (cellulose fibers, synthetic fibers) with varying properties in different layers. The first absorber layer uses highly absorbent materials for rapid uptake, while the second layer provides structural support and continued absorption, creating a composite structure that balances speed and complexity.
2Quantity of substance
If absorber thickness is increased to improve absorption capacity, then absorbable amount is secured, but flexibility decreases and weight increases
Solution Approach 1:
Different regions of the absorber have different properties: the first absorber layer is positioned to handle viscous liquid absorption with high SAP content for rapid uptake, while the second absorber layer provides additional capacity with different fiber composition. This local differentiation allows optimal absorption performance without uniformly increasing thickness and weight throughout the entire absorber structure.
Solution Approach 2:
The patent optimizes the thickness and composition parameters of each absorber layer separately. The first layer is designed with specific thickness and SAP content for rapid initial absorption, while the second layer has adjusted parameters for continued absorption. This parameter optimization allows achieving required absorbable amount while minimizing overall weight compared to a uniform thick absorber.
3Reliability
If conventional absorber structures are used, then structural simplicity is maintained, but viscous liquid remains on surface and leaks from periphery
Solution Approach 1:
The absorber is segmented into a first layer for rapid viscous liquid absorption and a second layer for continued absorption and containment. This segmentation ensures that viscous liquid is quickly taken up at the surface level and continuously absorbed through the layers, preventing surface pooling and peripheral leakage while maintaining manageable structural complexity.
Solution Approach 2:
The first absorber layer acts as an intermediary between the viscous liquid and the second absorber layer. It rapidly absorbs the viscous liquid from the surface and transfers it to the second layer, which provides continued absorption and containment. This intermediary function prevents direct contact between large volumes of viscous liquid and the final containment layer, improving leakage prevention while keeping the overall structure manageable.
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 significantly enhances the absorbability of viscous liquids by promoting quick permeation and retention, reducing surface presence and leakage, while maintaining flexibility and durability of the absorbent article.
Implementation Method 1
a viscous liquid can be quickly absorbed and diffused by a capillary phenomenon due to minute fiber gaps
Implementation Method 2
a particulate material containing super absorbent polymer particles
Data Source
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AI summary
To improve absorbability of a viscous liquid. The above problem is solved by an absorbent article in which an absorber 70 includes an upper auxiliary layer 71 disposed on an uppermost portion and a main absorption layer 72 disposed on a back surface side of the upper auxiliary layer 71, and the upper auxiliary layer 71 includes a super absorbent nonwoven fabric 42 having a surface exposed to an uppermost surface of the absorber 70 and having a Klemm water absorptiveness of 100 mm or more.