Surge Layer Absorbent Core Side Lying Leakage
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Solution Overview
Problem
Conventional absorbent articles, such as diapers, often leak liquid waste when the wearer is in a side-lying position due to insufficient fluid uptake rates and pooling of excess fluid, leading to leakage through gaps between containment flaps and the body, especially during high-volume and high-velocity urination events like nocturnal enuresis in children.
Innovation Solution
The absorbent article incorporates a surge layer that is in liquid communication with the absorbent core and side edges, creating a space for fluid to collect and absorb excess liquid, reducing leakage by decelerating and diffusing fluid surges into the core, thereby enhancing leakage protection when the wearer is in a side-lying position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional absorbent structures are used, then the absorbent article can contain liquid waste in sitting or standing position, but the article leaks liquid waste when the wearer is in side lying position due to insufficient fluid uptake rates
Solution Approach 1:
The absorbent article is divided into distinct functional zones: a target area for initial fluid reception, a surge layer for temporary fluid storage and deceleration, and an absorbent core for final absorption. This segmentation allows each zone to perform its specific function optimally, with the surge layer acting as a buffer that prevents direct overflow to containment flaps during high-volume urination events
Solution Approach 2:
The surge layer is positioned between the target area and the absorbent core to preemptively intercept and decelerate fluid surges before they reach the containment flaps. By performing this preliminary action, the surge layer prevents the formation of gaps between containment flaps and the wearer's body, thereby preventing leakage before it occurs
2Quantity of substance
If the absorbent core directly receives high-volume fluid surges, then absorption occurs, but excess fluid pools on the surface and leaks through gaps between containment flaps and body
Solution Approach 1:
The surge layer serves as an intermediary element between the target area and the absorbent core. It temporarily holds excess fluid and releases it gradually to the absorbent core, preventing direct pooling on the core surface and subsequent leakage through containment flap gaps. This mediator layer balances the high-volume fluid input with the absorption capacity of the core
Solution Approach 2:
The surge layer provides a cushioning effect by temporarily storing excess fluid before it reaches the absorbent core. This prior cushioning prevents the harmful effects of fluid pooling and leakage by absorbing the shock of high-volume urination events and releasing fluid gradually to the core
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 surge layer effectively reduces leakage by rapidly accepting and temporarily holding liquid waste, allowing for improved absorption and containment, even during high urination rates and velocities, thereby minimizing leaks through the article's seams and edges.
Implementation Method 1
The surge layer effectively reduces leakage by rapidly accepting and temporarily holding liquid waste, allowing for improved absorption and containment
Data Source
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AI summary
An absorbent article having improved leakage protection when the wearer of the absorbent article is lying on their side. The absorbent article has a surge layer in liquid communication with a portion of the garment facing region and a portion of a side edge of the absorbent core.