Folded Leg Gasketing Cuff for Diaper Leakage Protection
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Solution Overview
Problem
Conventional diaper designs face issues with manufacturing tolerances leading to uneven distribution of outer leg elastics, resulting in less effective leakage protection and a less aesthetically pleasing, clothing-like appearance due to the use of polymeric film and spaced-out elastics.
Innovation Solution
A folded outer leg cuff design with neatly finished edges and elastic members strategically positioned to maintain close proximity to the skin, eliminating the need for a polymeric film and enhancing leakage protection while achieving a garment-like appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If outer leg elastic strands are spaced inboard from the longitudinal edge, then manufacturing is easier and elastic strands are protected from cutting, but the fit is compromised and leakage risk increases
Solution Approach 1:
The patent extends the outer leg cuff laterally beyond the longitudinal edges of the chassis, creating a folded edge that wraps around the wearer's leg. This dimensional extension allows the elastic strands to be positioned closer to the effective edge while maintaining manufacturing safety through the folded structure.
Solution Approach 2:
The outer leg cuff is divided into distinct functional zones: a first portion containing the elastic strands joined to the chassis, and a second folded portion that extends beyond the chassis edges. This segmentation allows each zone to perform its specific function optimally.
2Reliability
If polymeric film is used in the outer leg cuff, then adhesive containment is improved, but manufacturing contamination occurs and aesthetic appearance deteriorates
Solution Approach 1:
The patent removes the polymeric film layer from the outer leg cuff structure, extracting the problematic element that caused manufacturing contamination and aesthetic issues. Adhesive containment is achieved through alternative means such as strategic adhesive application zones and the folded cuff structure itself.
Solution Approach 2:
The patent applies adhesive selectively in specific zones rather than using a universal polymeric film barrier. Adhesive is applied in controlled amounts at strategic locations where it is needed for joining, while the rest of the outer leg cuff remains free of adhesive and film materials.
3Shape
If outer leg elastic strands are spaced farther apart, then a wider finished cuff appearance is achieved, but control of gathers diminishes and leakage perception increases
Solution Approach 1:
The patent extends the cuff width by folding the material laterally beyond the chassis edges, creating a broader finished appearance. This dimensional extension allows for wider spacing of elastic strands while maintaining adequate coverage and control through the extended folded structure.
Data Source
AI summary
A disposable absorbent article may include a topsheet, a backsheet, 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.