Disposable Diaper Elastic Member Overlap for Crotch Sag Prevention
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Solution Overview
Problem
The existing disposable diapers face issues with sagging of the crotch region due to the weight of bodily fluids, leading to separation from the wearer and compromised leg fitting, which can result in side leakage.
Innovation Solution
The disposable diaper incorporates a configuration with elastic members arranged in an extended state along the longitudinal direction, overlapping with the joining unit in the thickness direction, to maintain the crotch region's position and ensure proper leg gathering, thereby preventing side leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the absorber is made larger to increase absorption capacity, then the absorption capacity is improved, but the weight of the absorber increases causing the crotch region to sag down
Solution Approach 1:
The patent applies the anti-weight principle by introducing elastic members that exert an upward counteracting force to balance the downward gravitational force of the heavy absorber. The elastic members are arranged to extend from the waistline region toward the crotch region, providing tensile force that prevents the crotch region from sagging down due to the increased weight of the absorber with greater absorption capacity.
2Ease of operation
If the elastic member is separated from the side flap to allow independent movement, then the ease of operation is improved, but the fitting ability at the legs deteriorates due to sagging
Solution Approach 1:
The patent applies the merging principle by integrating the elastic member with the side flap through a fixing member. This connection ensures that when the side flap is adjusted and fixed at the waistline, the elastic member is simultaneously secured in position. This integrated arrangement ensures that the elastic member maintains proper tension and position to form effective leg gathers, preventing sagging and ensuring reliable fitting ability while still allowing independent adjustment of the side flap.
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 configuration enhances the fitting ability at the legs, reducing the likelihood of side leakage by maintaining the crotch region's alignment with the wearer and preventing sagging, even when the absorber becomes heavy.
Implementation Method 1
elastic members configuring leg gathers which run around the legs of a wearer
Implementation Method 2
a joining unit configured to join the side flap and the diaper main body
Data Source
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AI summary
A disposable diaper has a diaper main body including a plurality of elastic members arranged in an extended state along a longitudinal direction of the absorber, at outer sides in a widthwise direction with respect to the absorber, a dorsal side flap protruded towards outer sides in the widthwise direction with respect to the diaper main body, at an outer end of the diaper main body in the longitudinal direction; and a joining unit configured to join the side flap and the diaper main body. The elastic member positioned at outermost sides in the widthwise direction out of the plurality of elastic members is overlapped in an extended state in the longitudinal direction, with the joining unit in a thickness direction of the disposable diaper.