Contoured Barrier Cuffs for Absorbent Articles
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Solution Overview
Problem
Current absorbent articles, such as diapers, face challenges in providing anatomically conforming barrier cuffs that effectively distribute loading forces while minimizing sagging and maintaining optimal barrier properties, with existing barrier cuffs being rectilinear and poorly adapted to the wearer's anatomy, leading to inefficiencies in material usage and increased cost.
Innovation Solution
The development of contoured barrier leg cuffs with varying cuff heights and spans, where the cuff height ratio and span ratio are greater than 1, allowing for a more anatomically compliant shape that distributes loading forces more evenly and reduces sagging, while maintaining effective barrier function in the crotch region and minimizing bulk in the waist region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If barrier cuffs are constructed with uniform rectilinear shape and equal spacing, then manufacturing is simple, but anatomical fit is poor and loading forces are not evenly distributed
Solution Approach 1:
The barrier cuff is designed with non-uniform properties: the cuff height varies along its length, being greater at the front and rear ends and smaller at the midsection. This local variation in height allows the cuff to conform to the anatomical contours of the wearer's body, providing better adaptation without significantly complicating manufacturing processes.
Solution Approach 2:
The invention transitions from a two-dimensional uniform rectilinear barrier cuff to a three-dimensional contoured structure with varying height along its length. This dimensional change enables the barrier cuff to match the anatomical shape of the wearer's body, improving adaptability while maintaining manufacturing feasibility through standard forming processes.
2Reliability
If barrier cuffs are made with larger cuff height to improve barrier function, then leakage protection is enhanced, but sagging in waist regions increases due to concentrated loading forces
Solution Approach 1:
The barrier cuff height is optimized locally: larger heights are provided at the front and rear ends where barrier function is most critical for preventing leakage, while a smaller height at the midsection reduces the concentration of loading forces in the waist regions. This local differentiation maintains effective leakage protection while minimizing sagging.
Solution Approach 2:
The cuff height parameter is varied along the length of the barrier cuff rather than remaining constant. By changing this geometric parameter, the design achieves both adequate barrier function at critical locations and reduced loading force concentration in waist regions, thereby preventing sagging while maintaining reliability.
3Adaptability or versatility
If barrier cuffs are tapered to reduce width in perineal area for better anatomical fit, then anatomical conformance is improved, but barrier effectiveness in containing exudates may be reduced
Solution Approach 1:
The barrier cuff is designed with different heights at different locations: the midsection has a smaller height that conforms to the narrow perineal area, while the front and rear ends have larger heights that provide enhanced barrier function for exudate containment. This local differentiation resolves the contradiction between anatomical fit and containment effectiveness.
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 contoured barrier cuffs provide improved anatomical fit, reduced sagging, and efficient material usage by distributing loading forces more evenly, while maintaining effective containment and leakage protection, thus enhancing wearer comfort and reducing production costs.
Implementation Method 1
a longitudinally extending elastic member joined to a barrier member such that the elastic member lifts the barrier zone away from the body-facing surface of absorbent article during wear of the absorbent article
Data Source
AI summary
A disposable absorbent article may comprise a chassis and a pair of longitudinally disposed barrier cuffs. Each cuff may contain a barrier zone, an attachment zone, and a transition edge separating the barrier zone and attachment zone. The barrier cuffs exhibit a cuff span and a cuff height at a given cross-section through a crotch point and an end region. The absorbent article exhibits a cuff span ratio, defined as a maximum cuff span as measured in the end region of the barrier cuff divided by a cuff span as measured at the crotch point, of greater than 1. The absorbent article exhibits a cuff height ratio, defined as a cuff height as measured at the crotch point divided by a minimum cuff height as measured in the end region, of greater than 1.