Absorbent Article Groove Stiffness Design
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Solution Overview
Problem
Absorbers in absorbent articles can collapse when body pressure is applied, leading to a deterioration in their functionality, particularly due to the closure of grooves or slits that are intended to enhance fluid transfer and air permeability.
Innovation Solution
Incorporating a high-stiffness part in the first absorber layer extending outward from the edges of grooves or slits, with a stiffness higher than the second absorber layer, to prevent collapse and maintain functionality under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a groove or slit is provided in the absorber to promote fluid transfer and air permeability, then the functionality of fluid transfer and air permeability is improved, but the groove or slit may collapse when body pressure is applied, deteriorating its function
Solution Approach 1:
The patent applies local quality by creating a high-stiffness part in the first absorber layer with different mechanical properties than the surrounding absorber material. This high-stiffness part is specifically positioned at the edge portion of the groove to provide localized structural support, preventing collapse while maintaining the groove's fluid transfer and air permeability functions. The differential stiffness creates a zone of enhanced stability exactly where needed to counteract body pressure effects.
Solution Approach 2:
The patent employs composite materials by combining absorber materials with different stiffness characteristics in a layered structure. The first absorber layer contains a high-stiffness part that forms a composite structure with the lower-stiffness second absorber layer. This composite construction allows the groove to maintain its shape under pressure while preserving the flexibility and absorption capabilities of the overall absorber assembly.
2Stability of the object's composition
If the stiffness of the absorber is increased to prevent groove collapse, then the structural stability is improved, but the flexibility of the absorber deteriorates
Solution Approach 1:
The patent resolves this contradiction by applying local quality - the high-stiffness part is localized specifically at the groove edge portion where structural support is needed, rather than making the entire absorber stiff. This localized stiffening provides groove stability while leaving the rest of the absorber flexible and adaptable to body contours and movement.
Solution Approach 2:
The patent uses segmentation by dividing the absorber into functional zones: a high-stiffness part for structural support at the groove edge, and lower-stiffness regions for flexibility and absorption. The absorber is also divided into multiple layers (first and second absorber layers) with different stiffness characteristics, allowing each segment to perform its specific function without compromising overall flexibility.
Data Source
AI summary
An absorbent article includes a liquid permeable top sheet, a liquid impermeable back sheet, and an absorber provided between the two sheets, the absorbent article having a predetermined length in a front-to-rear direction, and a predetermined width in a width direction perpendicular to the front-to-rear direction, wherein the absorber is provided with a groove or a slit extending in the front-to-rear direction, the absorber includes a first absorber layer on the side closer to the top sheet, and a second absorber layer on the side closer to the back sheet, and the first absorber layer includes a high-stiffness part extending outward in the width direction from an edge portion of the groove or slit, and a stiffness of the high-stiffness part is higher than a stiffness of the second absorber layer.