Layered Absorbent Core Structure for High-BMI Leakage Protection
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Solution Overview
Problem
Disposable absorbent articles with superabsorbent materials fail to provide adequate protection against leakage for users with high body mass index (BMI), leading to increased bunching and leakage risks due to inadequate fit and conformance.
Innovation Solution
The absorbent articles feature a configuration with a first and second absorbent core having varying widths and offsets, allowing for improved flexibility and conformance to the wearer's body, reducing bunching and enhancing leakage protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer absorbent core is used, then the article structure is simple, but users with high BMI experience exaggerated bunching and increased leakage
Solution Approach 1:
The absorbent core is divided into multiple layers (first absorbent core layer and second absorbent core layer) with different widths and configurations. This segmentation allows each layer to serve specific functions: the wider first layer provides overall absorbency while the narrower second layer maintains discretion and reduces bunching for high BMI users, thereby resolving the contradiction between structural simplicity and leakage protection reliability.
Solution Approach 2:
Different regions of the absorbent core are designed with different properties. The first absorbent core layer has a greater width than the second absorbent core layer, creating varying absorbency distribution across the article. This local quality variation ensures that high-absorbency areas are positioned where needed while narrower regions prevent excessive bulk and bunching, improving both reliability and comfort for diverse user types.
2Quantity of substance
If superabsorbent materials are incorporated into fibrous webs, then absorbency increases and bulk is reduced, but users with high BMI still experience bunching and leakage
Solution Approach 1:
The absorbent core incorporating superabsorbent materials is segmented into multiple layers with different width characteristics. The first layer provides high absorbency capacity while the second narrower layer prevents excessive bulk accumulation. This segmentation maintains the benefits of superabsorbent materials (high capacity, low bulk) while addressing the bunching issue for high BMI users through differential layer design.
Solution Approach 2:
The patent changes the width parameter of the absorbent core layers to optimize performance. By making the first absorbent core layer wider than the second layer, the design adjusts the distribution of absorbent materials to provide sufficient capacity while preventing the uniform bulk that causes bunching in high BMI users, thereby maintaining both absorbency and reliability.
3Quantity of substance
If the absorbent core width is increased to provide more absorbency, then absorbent capacity improves, but the article becomes bulkier and causes more bunching
Solution Approach 1:
The absorbent core is segmented into layers with progressively narrower widths. The first layer provides the primary absorbent capacity while subsequent layers are narrower, creating a stepped width profile. This segmentation allows the article to maintain sufficient absorbent capacity without the uniform bulk that would cause excessive bunching, as the narrower outer layers conform better to the wearer's body contours.
Solution Approach 2:
Different width zones are created within the absorbent core structure. The first absorbent core layer has a greater width providing high absorbency in the central region, while the second layer narrows toward the edges. This local quality variation in width allows the article to provide maximum absorbency where needed while maintaining a slimmer profile at the edges that reduces bunching and improves conformance to the wearer's body shape.
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 designed absorbent articles provide enhanced protection against leakage for users with varying BMIs by ensuring better fit and conformance, minimizing leakage risks through strategic core configurations and material distribution.
Implementation Method 1
a first absorbent core disposed between the topsheet and the backsheet, the first absorbent core having an intermediate region first absorbent core width; a second absorbent core disposed between the first absorbent core and the backsheet
Data Source
AI summary
A disposable absorbent article having a longitudinal centerline and a lateral centerline generally perpendicular to the longitudinal centerline is described herein. The disposable absorbent article has a topsheet; a backsheet; and an absorbent system disposed between the topsheet and the backsheet. The absorbent system has a first and second absorbent core configured such that there is an overlap between the first and second absorbent core and a pair of outboard distances for the first and second absorbent cores.