Raised Absorbent Core for Leakage Prevention
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Solution Overview
Problem
Conventional absorbent articles often fail to efficiently absorb body exudates due to their flat and thin design, leading to early failure and leakage as the exudates follow the body's contour before being absorbed, resulting in staining and discomfort.
Innovation Solution
The absorbent article features a fluid intake layer with multiple bonded nonwoven material layers, including a lapped through air bonded carded web and airlaid materials, providing a raised portion for enhanced vertical absorption and a resilient structure that maintains contact with the body, along with an embossed region to direct exudates effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the absorbent core is made flat and thin to provide comfort, then wearer comfort is improved, but absorption capability deteriorates leading to early failure and leakage
Solution Approach 1:
The patent introduces a raised portion in the absorbent core that extends upward from the base layer, transforming the flat two-dimensional structure into a three-dimensional structure. This dimensional change allows the absorbent core to maintain low profile for comfort while providing vertical depth for enhanced absorption capacity, resolving the contradiction between thinness and absorption capability.
Solution Approach 2:
The absorbent core is segmented into multiple functional layers including a base layer, raised portion, fluid intake layer, and body contact layer. This segmentation allows each layer to perform its specific function optimally - the base layer provides structural support, the raised portion provides absorption capacity, the fluid intake layer accelerates fluid acquisition, and the body contact layer ensures comfort and conformability.
2Volume of moving object
If the absorbent core is made flat and thin, then product thickness is reduced for comfort, but absorption speed deteriorates causing exudates to follow body contour before absorption
Solution Approach 1:
The patent introduces a fluid intake layer as an intermediary component between the body contact layer and the absorbent core. This fluid intake layer acts as a mediator that accelerates fluid acquisition through its highly porous structure and capillary action, transferring fluids rapidly to the absorbent core below, thereby increasing absorption speed without requiring increased overall product thickness.
3Reliability
If multiple material layers are bonded together to enhance absorption, then absorption capability is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functional layers into an integrated absorbent core structure where the base layer, raised portion, fluid intake layer, and body contact layer are bonded together as a unified component. This merging approach maintains enhanced absorption capability through multi-layer construction while simplifying manufacturing and assembly compared to separate modular components.
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
This design significantly improves vertical absorption capability, minimizing leakage and enhancing comfort by ensuring effective absorption and retention of body exudates, reducing the risk of staining and providing better protection for undergarments and outer garments.
Implementation Method 1
a fluid intake layer comprising a material comprising a first material layer and a second material layer bonded together, wherein the first material layer comprises from 2 to 16 sublayers
Implementation Method 2
an absorbent system positioned between the topsheet layer and the backsheet layer, the absorbent system comprising a fluid intake layer comprising a material comprising a first material layer and a second material layer bonded together
Data Source
AI summary
An absorbent article which can have an improved vertical absorption capability in the depth direction of the absorbent article. The absorbent article can have a topsheet layer, a backsheet layer, and an absorbent system positioned between the topsheet layer and the backsheet layer. The absorbent system can have at least a fluid intake layer and an absorbent core. The fluid intake layer can provide the absorbent article with a raised portion which can improve the vertical absorption capability in the depth direction of the absorbent article.