Disposable Wearing Article Waist Region Segmentation
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Solution Overview
Problem
Disposable wearing articles face issues with waist elastic members causing linear pressure, leading to discomfort and pressure marks on young babies, and the liquid absorbent structure shifting or slipping due to inadequate fit and elasticity.
Innovation Solution
A disposable wearing article design featuring a front waist region with a stretchable sheet and waist elastic members, where the contraction force of the second region is stronger than the first region, allowing for a snug fit without tightness and preventing the liquid absorbent structure from shifting or slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If waist elastic members are secured along the waist opening edge to provide elasticity, then the wearing article can fit the wearer's body, but the linear pressure causes discomfort and pressure marks on the skin
Solution Approach 1:
The front waist region is divided into multiple regions (first region between waist opening edge and liquid absorbent structure, second region including stretchable sheet and waist elastic members). This segmentation allows different contraction forces in different areas, distributing pressure away from the skin to prevent pressure marks while maintaining overall fit.
Solution Approach 2:
The invention applies different contraction force characteristics to different regions: the first region provides gentle fit with lower contraction force to avoid pressure marks, while the second region provides stronger contraction force for stable positioning. This local differentiation resolves the contradiction between fit and comfort.
2Adaptability or versatility
If the waist opening edge is elongated to fit around the waist, then it can accommodate the body shape, but it shifts position without conforming to body movement
Solution Approach 1:
Dividing the front waist region into multiple functional regions allows the waist opening edge to be elongated for body conformity while the second region with stronger contraction force prevents position shift, resolving the contradiction between adaptability and stability.
Solution Approach 2:
The stretchable sheet and waist elastic members provide dynamic elasticity that adapts to body movements. The segmented structure allows the waist opening edge to dynamically conform to body shape changes while maintaining position stability through the stronger contraction force in the second region.
3Object-affected harmful factors
If elasticity is imparted only by a stretchable sheet for the whole front waist region, then the fit is gentle, but the liquid absorbent structure moves upward and the wearing article slips down
Solution Approach 1:
The front waist region is segmented into a first region with gentle stretchable sheet for comfort and a second region with stronger contraction force for stable positioning of the liquid absorbent structure, resolving the contradiction between gentle fit and position stability.
Solution Approach 2:
Different contraction force characteristics are applied locally: the first region provides gentle fit without tightness, while the second region provides stronger contraction to prevent the liquid absorbent structure from moving upward and prevent slipping down.
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 ensures a stable fit along the body shape, preventing waist opening edge shifts and pressure marks, while maintaining effective absorption and preventing the liquid absorbent structure from moving upward or slipping down.
Implementation Method 1
a stretchable sheet extending inward in the vertical direction from a waist opening edge and overlapping with the end flap, a plurality of waist elastic members extending in the lateral direction and overlapping with at least the end flap
Implementation Method 2
a liquid absorbent structure having an absorbent core, extending to the front waist region centering on the crotch region and the rear waist region
Data Source
AI summary
A disposable wearing article which enables the liquid absorbent structure to fit the body stably, without a shift in position of the waist opening edge part when worn. A liquid absorbent structure further has an end flap positioned between a front-end edge of the liquid absorbent structure and a front-end edge of an absorbent core. A front waist region has a stretchable sheet extending inward in a vertical direction Y from a waist opening edge and overlapping with the end flap, a plurality of waist elastic members extending in a lateral direction X and overlapping with at least the end flap, a first region positioned between the waist opening edge and the front-end edge of the liquid absorbent structure, and a second region including the stretchable sheet and the waist elastic members, at an inner side in the vertical direction Y of the front-end edge of the liquid absorbent structure.