Fluid Management Layer Composition for Soft, Resilient Absorbent Articles
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Solution Overview
Problem
Disposable absorbent articles often face a trade-off between softness and resiliency, with materials that provide cushiony feeling tending to compress and lose shape under use, and resilient materials lacking softness. Additionally, fluid acquisition and stain masking are inadequate, leading to discomfort and potential leakage.
Innovation Solution
Incorporation of a fluid management layer composed of a carded nonwoven material with integrated fibers, featuring a specific basis weight, fiber composition, and caliper, which enhances resiliency, fluid acquisition speed, and stain masking without adhesives or latex binders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If lofty materials are utilized to provide a thick cushiony feeling article, then softness is improved, but resiliency deteriorates
Solution Approach 1:
The fluid management layer is constructed from a composite of different fiber types including hydrophilic fibers for fluid acquisition, hydrophobic fibers for structural support, and elastic fibers for resiliency. This multi-fiber composite approach allows the material to simultaneously provide softness through the lofty structure while maintaining resiliency through the elastic fiber component and shape recovery capabilities.
2Stability of the object's composition
If higher force is applied to compress an article, then resiliency is improved, but softness deteriorates
Solution Approach 1:
The absorbent article incorporates zones with different compression characteristics - the fluid management layer provides localized cushioning and softness at the wearer interface, while other structural components provide overall support and resiliency. This allows different regions of the article to have optimized properties for their specific functions without compromising overall performance.
3Stability of the object's composition
If absorbent articles are made resilient to recover shape, then shape recovery is improved, but softness deteriorates
Solution Approach 1:
The fluid management layer incorporates elastic fibers that provide dynamic recovery capabilities - the material can compress under applied forces during use and then actively recover its original shape when forces are removed. This dynamic behavior allows the article to adapt to movement and maintain both softness during compression and shape recovery when needed.
4Quantity of substance
If material characteristics change after fluid absorption, then fluid acquisition is improved, but flexibility deteriorates
Solution Approach 1:
The fluid management layer utilizes a porous nonwoven structure that allows rapid fluid penetration and acquisition. The porous architecture enables fluid to be quickly absorbed into the core while the interconnected void spaces maintain structural flexibility even after saturation. The hydrophobic fiber components help maintain structural integrity and flexibility by resisting fluid saturation in certain regions.
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 fluid management layer provides improved softness, resiliency, and fluid handling capabilities, maintaining shape and reducing visible stains, while ensuring rapid fluid acquisition and minimizing rewet.
Implementation Method 1
The fluid management layer comprises a carded fiber nonwoven material comprising a plurality of integrated fibers
Implementation Method 2
Users typically also desire resiliency. Namely, the article should be able to recover its shape, at least to some extent, due to forces applied to the article by the user
Data Source
AI summary
A disposable absorbent article having a topsheet, a backsheet, an absorbent core disposed between the topsheet and the backsheet, and a fluid management layer disposed between the topsheet and the absorbent core is disclosed. The disposable absorbent article provides improved fluid acquisition, improved stain size control, and improved performance when wet.