Resilient Absorbent Core Structure for Fluid Uptake and Comfort
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Solution Overview
Problem
Absorbent articles face challenges in maintaining structural integrity and flexibility while absorbing fluids, leading to discomfort and reduced protection, as they lose shape and resiliency during use.
Innovation Solution
An absorbent structure comprising one or more absorbent layers with a peak force compression between 30-150 grams and dry/wet recovery energy of 0.1-2.8 mJ and 0.6-5.0 mJ, incorporating bicomponent fibers, open-cell foam pieces, and superabsorbent polymers to maintain flexibility and resiliency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the absorbent core absorbs fluid, then absorption capacity is improved, but structural integrity is lost
Solution Approach 1:
The absorbent core is divided into multiple discrete absorbent particles distributed throughout a three-dimensional matrix structure. This segmentation allows each particle to absorb fluid independently while the overall matrix structure maintains its structural integrity and shape even when particles become saturated.
Solution Approach 2:
A flexible outer layer or shell encapsulates the absorbent core, maintaining the overall shape and structural integrity of the product even as the internal absorbent material expands during fluid absorption. This flexible containment prevents the core from losing its form while still allowing volume increase from absorption.
2Quantity of substance
If the absorbent core absorbs fluid, then absorption capacity is improved, but flexibility is lost
Solution Approach 1:
The absorbent core is enclosed in a flexible outer layer that can accommodate volume changes during absorption while maintaining product flexibility. This flexible shell allows the product to bend and move with the consumer's body without becoming rigid or uncomfortable, even when the absorbent material is saturated.
Solution Approach 2:
The product design incorporates controlled volume expansion parameters, allowing the absorbent core to increase in volume by a limited amount (e.g., less than 250% of original volume) while maintaining flexibility. The matrix structure and particle distribution are designed to absorb fluid without creating excessive rigidity or bulk that would compromise comfort.
3Quantity of substance
If the absorbent structure volume increases during absorption, then absorption capacity is improved, but comfort is reduced
Solution Approach 1:
The absorbent structure is designed to control the volume expansion parameter, limiting the increase in volume to a manageable range (e.g., less than 250% of original volume). The three-dimensional matrix and particle distribution are engineered to absorb fluid efficiently while minimizing bulk increase, thereby maintaining comfort and preventing the product from becoming noticeable or uncomfortable to the consumer.
Solution Approach 2:
A flexible outer layer provides a barrier that contains the absorbent core and distributes the volume increase uniformly, preventing localized bulging or discomfort. This flexible shell allows the product to maintain its original shape and fit while accommodating the volume changes from absorption, thereby preserving consumer comfort.
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 absorbent structure maintains its shape and comfort during use, absorbing fluids without significant volume increase, ensuring effective protection and user confidence.
Implementation Method 1
Absorbent cores that lose flexibility due to their composition may become uncomfortable
Implementation Method 2
superabsorbent polymers to maintain flexibility and resiliency
Implementation Method 3
determine the stored energy available to drive a products shape recovery or 'Energy of Recovery' following a compression of the article when in use
Data Source
AI summary
An absorbent structure comprising one or more absorbent layers wherein the absorbent structure exhibits a first cycle Peak Force compression between about 30 grams and about 150 grams. The absorbent structure further exhibits a fifth cycle dry recovery energy between 0.1 mJ and 2.8 mJ.