Absorbent Core Channel Configuration for Leakage Prevention
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Solution Overview
Problem
Absorbent cores with longitudinally extending channels in absorbent pants tend to fold into a U-shape when applied, reducing surface contact with the body and increasing the risk of leakage due to inadequate fit in the crotch region.
Innovation Solution
An absorbent core with a continuous channel configuration, featuring longitudinally-oriented and laterally-oriented portions, is designed to maintain optimal contact with the body by preventing excessive folding, ensuring better fit and reduced leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the absorbent core has longitudinally extending channels, then liquid acquisition rate is improved, but the absorbent core folds into a U-shape when applied to the body
Solution Approach 1:
The continuous channel is segmented into multiple portions (first longitudinally extending portion, second longitudinally extending portion, first laterally extending portion, second laterally extending portion) that are spatially distributed throughout the absorbent core. This segmentation allows different portions of the channel to serve different functions: longitudinal portions facilitate liquid acquisition while lateral portions prevent excessive folding by creating structural anchors at strategic locations.
Solution Approach 2:
Different portions of the channel have different orientations and functions tailored to local requirements. The longitudinally extending portions are optimized for liquid acquisition rate, while the laterally extending portions are positioned to control folding behavior in specific regions. This local differentiation allows the channel to simultaneously improve acquisition rate while maintaining proper fit in the crotch region.
2Quantity of substance
If the absorbent core has longitudinally extending channels, then liquid distribution is improved, but body surface coverage is reduced due to inadequate fit in the crotch region
Solution Approach 1:
The channel system is divided into longitudinally extending portions for liquid distribution and laterally extending portions for maintaining surface coverage. The lateral portions act as structural elements that prevent the core from folding away from the body, ensuring continuous contact in the crotch region while the longitudinal portions maintain effective liquid distribution pathways.
Solution Approach 2:
The channel configuration merges the liquid distribution function (longitudinal portions) with the structural support function (lateral portions) into a single integrated system. This combined structure simultaneously achieves effective liquid distribution along the length of the core while maintaining proper fit and body surface coverage through the lateral extensions that prevent folding.
3Ease of operation
If the absorbent core is pulled upwards between the wearer's legs, then the pant is properly applied, but the absorbent core forms a U-shape with reduced contact in the crotch region
Solution Approach 1:
The laterally extending portions of the channel are pre-positioned during manufacturing to act as structural anchors that resist U-shape formation. These lateral portions are strategically located to provide preemptive structural support in the crotch region, preventing excessive folding before the pant is fully applied, thereby maintaining body surface coverage during the application process.
4Volume of moving object
If the absorbent core uses higher proportions of superabsorbent polymer particles, then the core becomes thinner and less bulky when dry, but the core becomes saggy and bulky when wetted
Solution Approach 1:
The absorbent core is segmented into regions with different channel densities and orientations. The longitudinally extending portions are distributed to maintain structural rigidity through the crotch region when wetted, preventing the saggy appearance. Meanwhile, the overall core composition can still use high proportions of superabsorbent polymer particles to achieve thin, non-bulky characteristics when dry.
Solution Approach 2:
Different regions of the absorbent core have different channel configurations tailored to local requirements. The longitudinal portions are strategically positioned in areas needing structural support when wetted (crotch region) to prevent sagging, while allowing high superabsorbent polymer content in other areas to maintain thin profile when dry. This local differentiation resolves the contradiction between thin dry profile and non-saggy wet appearance.
Data Source
AI summary
The invention relates to a disposable absorbent pant comprising a central chassis and elasticized front and rear belt. The central chassis comprises an absorbent core with an absorbent layer. The absorbent layer comprises a continuous channel formed therein.