Disposable Pant Leg Edge Elastic Segmentation for Leakage and Chafing
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Solution Overview
Problem
Disposable pant-type articles face challenges in achieving a balance between fit, comfort, and leakage protection due to pre-tensioned elastic elements causing ruffled and wrinkled edges, which can lead to chafing and leakage issues, while also detracting from an underwear-like appearance.
Innovation Solution
The design incorporates elastically stretchable front and rear body panels with band-shaped crotch elastic members that are pre-tensioned in the longitudinal direction, featuring a concave edge and reinforcing elastic features to distribute forces evenly, preventing wrinkles and leakage, and maintaining a smooth, comfortable fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-tensioned elastic elements are arranged along the waist opening and leg openings to enhance body conformance and leakage security, then fit and leakage protection are improved, but ruffled and wrinkled edge portions are formed which cause chafing and detract from appearance
Solution Approach 1:
The elastic elements are segmented into discrete units (individual elastic elements or elastic bands spaced apart) rather than continuous elastic material. This segmentation allows the elastic force to be distributed at multiple discrete points along the leg edges, providing effective leakage protection while preventing the formation of continuous ruffled and wrinkled edge portions that cause chafing.
Solution Approach 2:
The elastic elements are strategically positioned at specific locations along the leg edges where they provide localized gathering and tension to enhance fit and leakage protection, while the spaces between these localized elastic elements maintain smooth edge portions that prevent chafing and provide an underwear-like appearance.
2Adaptability or versatility
If pre-tensioned elastic elements are used to gather web materials for better fit, then body conformance is improved, but ruffled and wrinkled edge portions are created that may serve as leakage channels
Solution Approach 1:
By using segmented elastic elements spaced apart from each other, the patent creates localized gathering zones that provide body conformance without forming continuous wrinkled channels. The spaces between the segmented elastic elements maintain smooth edge portions that act as barriers against leakage, thus improving reliability while maintaining adaptability.
3Ease of operation
If elastic components are incorporated to provide pre-tension for fit and comfort, then wearer comfort is improved, but the article complexity increases due to multiple components
Solution Approach 1:
The patent incorporates elastic components only at specific locations where they are most needed for comfort and fit (along the leg edges), rather than throughout the entire article. This localized use of elastic components provides wearer comfort while minimizing the overall complexity of the article structure.
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 solution enhances wearer comfort by eliminating wrinkles and leakage channels, providing a smooth, conforming fit that maintains an underwear-like appearance and improves absorbency and leakage protection.
Implementation Method 1
a pre-tensioned first crotch elastic member is arranged extending in the longitudinal direction along the first leg edge and a pre-tensioned second crotch elastic member is arranged extending in the longitudinal direction along the second leg edge
Data Source
AI summary
A disposable pant-type article including a front body panel and a rear body panel, each being elastically stretchable in the transverse direction, and a crotch region being located between a front panel crotch edge and a rear panel crotch edge. The article has first and second leg edges, each leg edge constituted by a front leg edge section being arranged in the front body panel, a rear leg edge section being arranged in the rear body panel; and a crotch leg edge section being arranged in the crotch region. A pre-tensioned first crotch elastic member is arranged extending in the longitudinal direction along the first leg edge and a pre-tensioned second crotch elastic member is arranged extending in the longitudinal direction along the second leg edge. The crotch leg edge section of the leg edges extends completely or partly in the respective crotch elastic member.