Barrier Cuff Layout to Reduce Absorbent Article Side Leakage
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Solution Overview
Problem
Existing absorbent articles face issues with side leakage, particularly with premium lofty topsheets, soft topsheets, air-through bonded topsheets, and topsheets based on natural materials, as liquids can be guided via the topsheet under the barrier cuffs, leading to leakage.
Innovation Solution
The absorbent article design features barrier cuffs with an inwards unattached portion and outwards attached portion, where the topsheet width is less than or equal to the distance between hinge points, and the cuffs are free of attachment to the topsheet in the crotch region, minimizing the presence of the topsheet under the outwards attached portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the topsheet width is increased to improve absorbency and comfort, then the absorbent capacity is improved, but liquid can be guided via the topsheet under the barrier cuffs towards the sides, causing side leakage
Solution Approach 1:
The barrier cuff is divided into two functional portions: an outwards attached portion that prevents side leakage and an inwards unattached portion that allows the topsheet to be separated from the barrier cuff in the crotch region. This segmentation enables the topsheet to be narrower than the distance between hinge points, blocking liquid guidance under the cuff while maintaining adequate absorbent capacity
Solution Approach 2:
The barrier cuff is configured to extend beyond the lateral edges of the topsheet, creating a dimensional relationship where the cuff width exceeds the topsheet width. This dimensional arrangement ensures that the topsheet cannot guide liquid under the barrier cuff to the sides, effectively preventing side leakage while maintaining absorbency
2Object-affected harmful factors
If barrier cuffs are attached throughout their length to the topsheet to improve leakage protection, then side leakage is reduced, but the complexity of the attachment system increases and comfort is compromised
Solution Approach 1:
The attachment system is segmented into two distinct zones: the outwards attached portion is secured to the topsheet to prevent side leakage, while the inwards unattached portion remains free of attachment in the crotch region. This selective segmentation reduces attachment complexity while maintaining leakage protection where most needed
Solution Approach 2:
Different attachment characteristics are applied to different portions of the barrier cuff: the outwards portion has strong attachment to the topsheet for leakage prevention, while the inwards portion has no attachment to ensure comfort and allow natural movement in the crotch region. This local differentiation optimizes both leakage protection and comfort
3Object-affected harmful factors
If the topsheet is made narrower to prevent liquid guidance under the barrier cuff, then side leakage is reduced, but the material usage and CO2 footprint are decreased
Solution Approach 1:
The problematic function of the topsheet to guide liquid under the barrier cuff is eliminated by making the topsheet narrower than the distance between hinge points. The barrier cuff's outwards attached portion extracts and performs the leakage prevention function independently, allowing the topsheet to be narrower without compromising protection while reducing 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
This design significantly reduces side leakage, especially in larger sizes and during increased wearer movement, while potentially reducing material and CO2 footprint, and enhances comfort by minimizing plastic contact with the skin.
Implementation Method 1
elastic gathering elements have been incorporated in various ways along the lateral edges of the absorbent article. These may include barrier cuffs which are elasticized flaps which stand substantially upright
Implementation Method 2
gasketing cuffs, also called leg elastics, which are elasticized flaps which do not stand substantially upright, and which are more preferably disposed outwardly towards the longitudinal side edges of the article
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The present disclosure relates to an absorbent article (100) comprising a pair of barrier cuffs (20a, 20b) extending in a longitudinal direction from the front waist region to the back waist region along the topsheet (10), each barrier cuff (20a, 20b) comprising an inwards unattached portion (21) and an outwards attached portion (23) with a hinge point (22a, 22b) therebetween. The maximum width of the topsheet (WT) is less than or equal to a distance (DH) measured along the lateral axis (X-X) between the hinge points (22a, 22b) of each barrier cuff (20a, 20b) and the barrier cuffs (20a, 20b) are free of any attachment to the topsheet (10) in the crotch region (2) .