Leak-Proof Cuff Structure for Soft Feel and Upright Diaper Fit
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Solution Overview
Problem
Existing disposable diapers with soft nonwoven fabric leak-proof cuffs lack sufficient upstanding capabilities, leading to reduced fit and increased leakage due to the wearer's movement during wear, resulting in reduced fit and increased leakage of bodily waste.
Innovation Solution
The leak-proof cuff includes a leak-proof cuff that includes a fixed edge, an elasticized free edge region, and a fold between the edges, with a soft upper region and a joined lower region, providing both upstanding capabilities and a soft feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If soft nonwoven fabric is used for leak-proof cuffs, then the feel against skin is improved, but upstanding capabilities are insufficient
Solution Approach 1:
The leak-proof cuff is divided into multiple functional regions: a first region with high stiffness (5-20 cN) for upstanding capability, a second region with low stiffness (0.1-5 cN) for skin comfort, and a third region with medium stiffness for transition. This segmentation allows each region to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different regions of the leak-proof cuff are assigned different stiffness properties tailored to their specific functions. The first region near the fixed edge has high stiffness to provide structural support and upstanding capability, while the second region at the free edge has low stiffness to provide soft feel against skin, and the third region provides a gradient transition between these extremes.
2Ease of operation
If soft nonwoven fabric is used for leak-proof cuffs, then the feel against skin is improved, but fit to wearer's movement is reduced
Solution Approach 1:
The leak-proof cuff is divided into multiple functional regions: a first region with high stiffness (5-20 cN) for upstanding capability, a second region with low stiffness (0.1-5 cN) for skin comfort, and a third region with medium stiffness for transition. This segmentation allows each region to perform its specific function optimally without compromising the other.
Solution Approach 2:
The leak-proof cuff incorporates an elastic member that dynamically adjusts the cuff's configuration during wearer movement. The elastic member allows the cuff to expand and contract, maintaining fit and functionality as the wearer moves, while the multi-region stiffness structure ensures proper upstanding and comfort characteristics are preserved throughout the range of motion.
3Ease of operation
If soft nonwoven fabric is used for leak-proof cuffs, then the feel against skin is improved, but leakage prevention is increased
Solution Approach 1:
The leak-proof cuff is divided into multiple functional regions: a first region with high stiffness (5-20 cN) for upstanding capability, a second region with low stiffness (0.1-5 cN) for skin comfort, and a third region with medium stiffness for transition. This segmentation allows each region to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different regions of the leak-proof cuff are assigned different stiffness properties tailored to their specific functions. The first region near the fixed edge has high stiffness to provide structural support and upstanding capability, while the second region at the free edge has low stiffness to provide soft feel against skin, and the third region provides a gradient transition between these extremes.
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 diaper provides a superior fit to the wearer's skin by conforming to movement while maintaining effective leakage prevention.
Implementation Method 1
an elasticized free edge region having an elastic member arranged along the free edge
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A disposable diaper 1 has leak-proof cuffs 6. Each leak-proof cuff 6 includes two facing nonwoven layers 60 having a friction coefficient mean deviation (MMD) of 0.015 or smaller. The leak-proof cuff 6 has a free edge 61 along a lateral side edge and a fixed edge 62 along the opposite lateral side edge. The leak-proof cuff 6 has an elasticized free edge region 64 having an elastic member 63 fixed along the free edge 61 and a fold 66 between the free edge 61 and the fixed edge 62. The leak-proof cuff 6 includes an upper soft region 69 between the elasticized free edge region 64 and the fold 66 and a lower joined region 68 between the fold 66 and the fixed edge 62. The upper soft region 69 has the two nonwoven layers 60 unjoined together or has a lower peel strength between the two nonwoven layers 60 than the lower joined region 68.