Absorbent Core With Shape-Changing Channels For Hygiene Products
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Solution Overview
Problem
Current absorbent cores in hygiene products face challenges in achieving uniform liquid distribution and comfort, with a need for improved fluid absorption characteristics and longer-lasting dryness, as well as an effective automatic indication of saturation.
Innovation Solution
The development of an absorbent core with substantially continuous high fluid distribution structures and discontinuous fluid absorption structures, featuring interconnected channels that facilitate faster liquid distribution and a unique shape change upon saturation, providing both visual and tactile indication of saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional absorbent core structures are used, then fluid absorption capacity is achieved, but uniform liquid distribution and comfort are insufficient
Solution Approach 1:
The absorbent core is divided into multiple functional zones with different structures: a first zone with high fluid distribution structures (channels) for rapid liquid transport, and a second zone with absorbent material for fluid retention. This segmentation allows simultaneous achievement of fast distribution and uniform absorption across different regions of the core.
Solution Approach 2:
Different regions of the absorbent core are assigned different properties: the first zone contains channels with high fluid distribution capability for rapid liquid transport, while the second zone contains absorbent material optimized for fluid retention. This local differentiation enables each zone to perform its specific function optimally, achieving both fast distribution and uniform absorption.
2Quantity of substance
If absorbent material is continuously present, then fluid absorption is maintained, but saturation indication becomes difficult
Solution Approach 1:
The core is segmented into a first zone with channels that remain visible when wet, and a second zone with absorbent material. The channel structure provides a visual contrast that persists even when saturated, enabling automatic saturation indication without interfering with the absorbent material's fluid retention function.
Solution Approach 2:
The channel structure in the first zone provides a visual indicator that changes appearance or remains visible upon saturation. The contrasting structure between the channel zone and absorbent material zone creates an automatic visual signal when the absorbent core becomes saturated, eliminating the need for separate indicators.
3Speed
If high fluid distribution structures are added, then liquid distribution speed increases, but device complexity increases
Solution Approach 1:
The channel structure for fluid distribution is merged with the absorbent core itself, forming an integrated structure where the first zone contains channels that are part of the core architecture. This eliminates the need for separate distribution mechanisms, achieving fast liquid distribution without adding external complex components.
Solution Approach 2:
The channel structure serves multiple functions: it acts as a fluid distribution pathway for rapid liquid transport, provides structural definition for the core zones, and serves as a visual indicator for saturation status. This multi-functionality reduces the need for separate components, simplifying the overall device while maintaining high liquid distribution speed.
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 enhances liquid distribution across the core, maintains longer dryness perception, and offers a more effective automatic saturation warning system compared to traditional methods.
Implementation Method 1
one or more substantially interconnected channels extending through at least a portion of the crotch portion along the length of the core and along at least a portion of said width of the core from one side of the core to the other
Implementation Method 2
comprising a front portion, a back portion, a crotch portion position between the front portion and the back portion
Data Source
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AI summary
An absorbent core comprising a front portion; a back portion; a middle portion positioned between the front portion and the back portion; and a longitudinal axis extending along a length of said core and crossing said front, middle and back portions, the absorbent core having a width extending perpendicular to said length and a perimeter comprising at least two opposing ends and at least two opposing sides positioned between said ends wherein the absorbent core comprises one or more channels having a first shape when the absorbent core is in dry state and a second shape when the absorbent core is in wet state and wherein said first and second shapes are different.