Clefted Absorbent Article Topsheets for Leakage Prevention
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Solution Overview
Problem
Disposable absorbent articles with wings or side flaps often suffer from fluid leakage issues due to the lack of absorbency and uncomfortable texture of polymer film wings, which can lead to soiling of the wearer's undergarments and clothing, and are perceived as lower quality due to their plastic-like texture and appearance.
Innovation Solution
The development of absorbent articles featuring a topsheet with structurally modified zones, including clefts and film ruptures, created by urging discrete portions of the polymeric film towards or away from the backsheet, providing improved fluid handling, texture, and aesthetic benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymer film is used for wings to provide fluid containment, then fluid leakage prevention is improved, but texture comfort and appearance quality deteriorate due to plastic-like texture
Solution Approach 1:
The patent applies porous materials by incorporating an apertured film layer in the wing portions of the topsheet. This layer contains multiple apertures that provide absorbency and wick fluid away from the surface, eliminating the plastic-like feel while maintaining fluid containment. The porous structure allows the wing to feel softer and more comfortable against the skin while still preventing leakage.
Solution Approach 2:
The patent uses composite materials by combining multiple layers in the wing portions: an apertured film layer, a nonwoven layer, and potentially other functional layers. This composite structure integrates the fluid containment properties of the film with the softness and absorbency of the nonwoven material, achieving both leakage prevention and comfort.
2Ease of manufacture
If uniform topsheet structure is used across the entire absorbent article, then manufacturing simplicity is maintained, but fluid handling performance deteriorates in specific zones
Solution Approach 1:
The patent applies local quality by providing different structural configurations in different zones of the topsheet. The wing portions have apertured film and nonwoven layers for absorbency and comfort, while the central body portion may have a different structure optimized for fluid acquisition and distribution. This zone-specific design allows each area to perform its specific function optimally.
Solution Approach 2:
The patent segments the topsheet into distinct functional zones: wing portions with apertured film and nonwoven layers for containment and comfort, and a central body portion for fluid handling. This segmentation allows each zone to be optimized for its specific function while maintaining overall integration.
3Reliability
If clefts are formed by urging polymeric film towards the backsheet, then fluid management and texture are improved, but structural integrity of the film may deteriorate
Solution Approach 1:
The patent forms clefts in the apertured film layer by urging discrete portions of the polymeric film toward the backsheet. These clefts create channels that enhance fluid management and provide a softer texture. The apertured structure and multi-layer construction maintain structural integrity while allowing the clefts to form for improved performance.
Data Source
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AI summary
An absorbent article comprising a topsheet and laterally extending wings is disclosed. The topsheet having a plurality of clefts is disclosed. The plurality of clefts of the first type can be formed by urging discrete portions of the topsheet in a first direction and the plurality of clefts of the second type are formed by urging discrete portions of the topsheet in a second direction that is different than the first direction. The first or second plurality of clefts can be positioned proximate to a wing or flap of the absorbent article.