Absorbent Article Leg-Circumference Extension Sections
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Solution Overview
Problem
Disposable diapers face issues with lateral leakage due to second barrier cuffs being affected by waist stretchable members, leading to poor fit around the legs and increased risk of excrement seepage through seams between sheets.
Innovation Solution
An absorbent article design featuring waist-circumference sections with elastic members stretchable in the lateral direction and extension sections with elastic members stretchable vertically, formed using a continuous sheet to enhance stiffness and prevent seam exposure, ensuring a closer fit around the legs and reducing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If second barrier cuffs are formed by joining side sheet and cover sheet together, then the structure can be assembled, but excrement is likely to seep out from seam between the two sheets
Solution Approach 1:
The side sheet and cover sheet are merged into a single integrated barrier cuff structure, eliminating the seam between two separate sheets that could allow excrement seepage, while maintaining the assembled protective function
2Adaptability or versatility
If waist stretchable members are used to provide elasticity, then the diaper can fit the wearer, but the second barrier cuffs are easily affected and might contract or curl in lateral direction
Solution Approach 1:
The barrier cuff is segmented into functional zones with different elasticity characteristics - the lateral sides have reduced elasticity to prevent curling while the front and back portions maintain stretchability for fit, separating the conflicting requirements of adaptability and shape stability
Solution Approach 2:
Different regions of the barrier cuff are given different elastic properties - the lateral sides use materials or structures with lower elasticity to maintain shape stability, while other regions maintain higher elasticity for adaptability, allowing each region to perform its specific function optimally
3Ease of manufacture
If extension sections are formed using separate sheets, then the structure can be assembled, but seams are exposed and increase risk of excrement seepage
Solution Approach 1:
The extension sections are formed as a continuous integrated structure from a single sheet, merging what would otherwise be separate assembled components, thereby eliminating exposed seams that could allow excrement seepage while maintaining manufacturability
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 design effectively suppresses lateral leakage by maintaining the leg openings with sufficient width and preventing excrement from seeping through seams, providing a comfortable and secure fit for the wearer.
Implementation Method 1
extension sections each having an elastic member stretchable in the vertical direction placed therein
Implementation Method 2
a welded region having a predetermined length in the lateral direction being placed in a portion where each of the extension sections forms a leg opening
Data Source
AI summary
An absorbent article including an absorbent main body including an absorbent body. The absorbent main body having a longitudinal direction conforming to a vertical direction; and waist-circumference sections in a pair respectively located on one end side and another end side in the longitudinal direction of the absorbent main body. The waist-circumference sections each including an elastic memberstretchable in a lateral direction. The absorbent main body including a pair of extension sections respectively extending outward on two sides of the absorbent body. The extension sections each having an elastic member stretchable in the vertical direction. The extension sections are formed extending laterally outward from a position on a non-skin side of the absorbent body using a continuous sheet that is continuous in the lateral direction. A welded region having a predetermined length in the lateral direction is in a portion where each of the extension sections forms a leg opening.