Barrier Flap Elastic Member Distribution for Leakage and Skin Irritation
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Solution Overview
Problem
Conventional elastic barrier flaps in disposable absorbent articles often fail to provide an adequate seal against the wearer's body, leading to leakage, or they can irritate the skin due to excessive elasticization, necessitating a solution that balances seal effectiveness with comfort and skin safety.
Innovation Solution
The design incorporates a web with a gap and symmetrically arranged elastic members to create an air pocket, providing a soft and comfortable barrier against exudates while inhibiting transverse flow without excessive pressure on the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the elasticization of the distal edges of the barrier flaps is increased to provide a better seal against the wearer's body, then the seal effectiveness is improved, but the barrier flaps may irritate and/or mark the wearer's skin due to excessive pressure
Solution Approach 1:
The barrier flap is designed with non-uniform elastic member distribution, where the first elastic member is positioned at the distal edge to provide sealing pressure, while the remaining elastic members are distributed along the longitudinal extent. This local differentiation allows the distal edge to maintain adequate seal effectiveness while reducing excessive pressure concentration that would cause skin irritation.
Solution Approach 2:
The barrier flap is segmented into distinct functional zones: a distal edge region with the first elastic member for sealing, and a longitudinal body with remaining elastic members for structural support. This segmentation allows independent optimization of sealing performance and comfort, resolving the contradiction between seal effectiveness and skin irritation.
2Object-affected harmful factors
If the elasticization of the distal edges of the barrier flaps is decreased to reduce skin irritation, then the comfort is improved, but the barrier flaps may fail to provide an adequate seal against the wearer's body, resulting in leakage
Solution Approach 1:
The barrier flap concentrates elasticization at the distal edge where the first elastic member is positioned, providing adequate sealing pressure exactly where needed. The remaining portions of the flap have reduced elastic member density, minimizing pressure on the body and preventing skin irritation while maintaining seal effectiveness.
Solution Approach 2:
The barrier flap applies elastic pressure partially and selectively - the first elastic member provides sufficient elasticization at the distal edge to ensure sealing, while the remaining elastic members are spaced to provide just enough support without excessive pressure, thus achieving adequate seal with minimal irritation.
3Reliability
If the barrier flaps are designed with high elasticization to inhibit transverse flow of exudates, then the leakage protection is improved, but the barrier flaps can irritate and/or mark the wearer's skin due to high tension and/or elongation
Solution Approach 1:
The barrier flap structure implements local quality by positioning the first elastic member at the distal edge to provide high elasticization for leakage protection, while distributing the remaining elastic members along the longitudinal extent at lower density. This creates a gradient of elastic pressure that protects against leakage at the critical sealing point while reducing irritation along the body-contacting surfaces.
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 effectively reduces leakage while maintaining comfort and preventing skin irritation, offering a perceived softness that enhances user experience.
Implementation Method 1
Each of the barrier flaps includes a proximal edge attached to the body-side liner (or some other suitable component of the article) and an elasticized distal edge opposite the proximal edge
Implementation Method 2
The web and plurality of elastic members are adapted to inhibit the transverse flow of body exudates released by a wearer of the absorbent article
Data Source
Figure 1
Figure 2
Figure 3~3B
AI summary
An elastic barrier flap for an absorbent article includes a web configured to define a gap and a plurality of elastic members captured by the web. The plurality of elastic members is symmetrically arranged about the gap defined by the web. The web and plurality of elastic members are adapted to inhibit the transverse flow of body exudates released by a wearer of the absorbent article.