Absorber Curving Units for Disposable Diaper Fit
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Solution Overview
Problem
The existing disposable diapers face issues with wearing comfort due to the unequal shape of the absorber at the center and side crotch portions, leading to potential gaps or excessive adhesion, which affects absorption performance and comfort.
Innovation Solution
A disposable diaper design featuring a central curving unit and pairs of first and second curving units that allow the absorber to curve in convex shapes, with specific elastic members and slit configurations to match the body contours, ensuring improved fit and absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the absorber is curved in a convex shape to improve absorption performance, then the absorption performance is improved, but the wearing comfort deteriorates due to gaps or excessive adhesion
Solution Approach 1:
The patent applies different curving configurations to different regions of the absorber. The central curving unit has a longer length than the first and second curving units, creating locally optimized curvature that matches the body's contour. This local differentiation allows the absorber to maintain both high absorption performance through effective curving and wearing comfort by avoiding excessive adhesion or gaps in specific regions.
Solution Approach 2:
The patent introduces asymmetric curving unit lengths where the central curving unit extends further than the side curving units. This asymmetric design reflects the natural asymmetry of the human body contour in the crotch region, allowing the absorber to fit better without creating uncomfortable gaps or excessive adhesion points, thus resolving the contradiction between absorption performance and wearing comfort.
2Ease of manufacture
If the central curving unit length is equal to the side curving unit length, then the manufacturing is simplified, but the fit to body contours deteriorates
Solution Approach 1:
The patent specifies that the central curving unit has a different length than the first and second curving units, creating local quality variations that match the body's natural contours. This local differentiation improves the fit to body shape while maintaining reasonable manufacturing simplicity through a standardized curving unit design that only varies in length parameter.
Solution Approach 2:
The patent resolves the contradiction by changing the length parameter of the curving units differently in the central and side regions. This parameter variation allows the absorber to conform to the asymmetric body contour while maintaining a relatively simple manufacturing process that only requires adjusting the length parameter during production.
Data Source
AI summary
A disposable wearing article includes a central curving unit that allows the absorber to curve in the inner direction in a convex shape is formed in the center of the absorber, a pair of first curving units along the front-back direction that allow the absorber to curve in the outer direction in a convex shape is formed outboard of the central curving unit of the absorber, a pair of second curving units along the front-back direction that allow the absorber to curve in the inner direction in a convex shape is formed outboard of the first curving unit of the absorber, and a front end of the central curving unit is positioned posteriorly of a front end of a second curving unit.