Barrier Leg Cuff and Stretchable Side Panel for Absorbent Article Fit
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Solution Overview
Problem
Absorbent articles, such as diapers, tend to sag, gap, slide, or slip during use due to wearer movements and deformation, leading to premature leakage and poor fit, especially at the waist regions, despite the use of elastic waist features which can rollover or roll-in, compromising comfort and containment.
Innovation Solution
Incorporating a barrier leg cuff structure and elastically stretchable side panels with specific bonding patterns to enhance fit and containment, including a longer front bond region for the barrier cuff and strategically located intermediate bonds to minimize sagging while maintaining effective leakage protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If elastic waist features are used to provide snug fit, then waist fit is improved, but sagging and rollover occur
Solution Approach 1:
The waist region is divided into multiple segments with different elastic properties: a front waist portion with lower elasticity and a back waist portion with higher elasticity. This segmentation allows each portion to perform its specific function - the front provides comfort and prevents rollover while the back provides secure fit and prevents sagging.
Solution Approach 2:
Different portions of the waist are assigned different elastic characteristics tailored to their specific functional requirements. The front waist has reduced elasticity to prevent rollover and enhance comfort, while the back waist has increased elasticity to maintain secure fit and prevent sagging during wear.
2Reliability
If barrier leg cuff is added to prevent leakage, then containment is improved, but device complexity increases
Solution Approach 1:
The barrier leg cuff is merged with the elastic waist feature, combining two functional elements into a single integrated structure. The cuff portion extends from the elastic waist and incorporates both the barrier function and elastic recovery in one component, reducing overall device complexity while maintaining leakage protection.
Solution Approach 2:
The barrier leg cuff serves multiple functions simultaneously: it acts as a leakage barrier, provides elastic recovery to maintain fit, and integrates with the waist feature. This multi-functionality reduces the need for separate components and simplifies the overall device structure.
3Stability of the object's composition
If intermediate bonds are added to minimize sagging, then fit stability is improved, but manufacturing complexity increases
Solution Approach 1:
Intermediate bonds are strategically positioned at specific locations where sagging is most likely to occur, rather than uniformly distributed. This localized bonding approach provides fit stability where needed while minimizing overall manufacturing complexity and material usage.
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 provides improved fit, reduced leakage, and enhanced wearer comfort by minimizing sagging and sliding of the absorbent article, while maintaining effective containment of body exudates through the use of barrier cuffs and stretchable side panels.
Implementation Method 1
Elastic waist features will typically include an elasticized waistband consisting of an elastic member contractibly affixed between the topsheet and the backsheet. The elasticized waistband is designed to expand and contract with the wearer's motions and to maintain the fit of the absorbent article about the waist of the wearer during use
Implementation Method 2
an elastically stretchable side panel (154) joined to the chassis (312) at a panel joint region (155)
Data Source
AI summary
An absorbent article includes a barrier cuff strip extending in a longitudinal direction from the front waist region to the back waist region along the topsheet. The barrier cuff strip has a distal edge attached to the topsheet at a cuff end bond region. The barrier cuff has an outer bond edge spaced longitudinally from an inner bond edge. The disposable absorbent article includes a side panel that extends laterally beyond a side of the chassis and is joined to the chassis at a panel joint region extending between an outer panel joint edge and an inner panel joint edge. The longitudinal distance from the lateral axis to the inner panel joint edge is at least about ¼ of a longitudinal distance from the lateral axis to the inner bond edge of the cuff end bond region.