Absorbent Article Leg Cuff Design for Leakage Containment
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Solution Overview
Problem
Current absorbent articles, such as diapers and adult incontinence products, face issues with leakage due to gaps between the article and the wearer's legs or waist, leading to soiling and discomfort, and lack a garment-like design with evenly distributed elastic for improved fit and aesthetics.
Innovation Solution
A disposable absorbent article featuring a leg gasketing system with a folded outer cuff design and a pocket structure that includes an inner and outer cuff, where the web of material is folded to create a pocket with an opening on the inboard longitudinal edge, providing enhanced containment and aesthetics without the need for a polymeric film layer in the elasticized region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymeric film layer is used in the leg cuff to prevent adhesive bleedthrough and provide high opacity, then leakage prevention and manufacturing reliability are improved, but the article develops a plastic-like appearance and creates noise during application
Solution Approach 1:
The patent removes the polymeric film layer from the leg cuff structure, extracting the component responsible for the plastic-like appearance and noise while maintaining the essential functions through alternative means (barrier leg cuff made of hydrophobic nonwoven material and proper adhesive application techniques)
Solution Approach 2:
The patent uses composite material structures, specifically combining hydrophobic nonwoven material with the backsheet layer to create a barrier leg cuff that provides both leakage prevention and aesthetic appearance without requiring a polymeric film layer
2Ease of manufacture
If outer leg elastic strands are spaced inboard from the longitudinal edge to prevent cutting exposure, then manufacturing safety is improved, but the edge control capability diminishes and leakage perception increases
Solution Approach 1:
The patent addresses the spacing issue by using a folded outer cuff design where the cuff material itself extends to the longitudinal edge, creating a multi-layer structure that provides edge control and leakage prevention without requiring elastic strands to be positioned at the very edge
3Device complexity
If only two to three outer leg elastics per side are used to create gathers, then device complexity is reduced, but achieving the desired appearance of a wide finished leg cuff becomes difficult
Solution Approach 1:
The patent segments the leg cuff structure into distinct functional layers (barrier leg cuff and outer cuff) where the outer cuff material itself provides the gathering and finishing effect, eliminating the need for multiple elastic strands while achieving the desired wide finished appearance
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 design effectively reduces leakage by creating additional void volumes within the leg cuffs for containment, maintaining a close fit to the skin, and providing a more aesthetically pleasing, garment-like appearance while minimizing the risk of soiling and improving user comfort.
Implementation Method 1
The outer cuff contains the outer leg elastic strands, which create the contraction forces and gathers
Implementation Method 2
The barrier leg cuff may be made using a hydrophobic nonwoven and may be disposed on the body-facing surface
Implementation Method 3
the leg gasketing system comprises a web of material forming an inner cuff and an outer cuff... providing enhanced containment
Data Source
AI summary
A disposable absorbent article may include a chassis that includes a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet; and a leg gasketing system. The leg gasketing system may include an inner cuff and an outer cuff; the inner cuff may include an inner cuff folded edge and an inner cuff material edge and the outer cuff may include an outer cuff folded edge and an outer cuff material edge such that the web of material is folded laterally inward to form the outer cuff folded edge and folded laterally outward to form the inner cuff folded edge. The leg gasketing system may also include a leg gasketing system pocket with an opening on an inboard longitudinal edge of the pocket.